0 im-6822 manual.book
Circularly Polarized FM
Broadcast Antenna
Model 6822
Instruction Manual
Installation, Operation, &
Maintenance
Congratulations!
Thank you for purchasing one of the finest FM broadcast antennas on the
market today. The Shively Labs 6822 is the top-of-the-line in its class for its
simplicity, superior performance and durability.
Your purchase is backed by the best technical support in the industry. Shively
is a leading manufacturer in the broadcast industry, providing an extensive
range of antennas, transmission line and components. Our technical staff has
a wealth of experience in the broadcast industry and is standing by to serve
you in any way.
This manual is intended to give you a good basic understanding of your
antenna: its proper and safe installation, startup, and operation, and troubleshooting and maintenance information to keep it working satisfactorily for
years to come. Please have everyone involved with the antenna read this
manual carefully, and keep it handy for future reference.
Meanwhile, please feel free to contact your sales representative at Shively
Labs at any time if you need information or help. Call or write:
Publication No. im-6822 (170824)
IMPORTANT
Please read this manual in its entirety before beginning
installation of your antenna!
Failure to follow the installation and operation
instructions in this manual could lead to failure of your
equipment and might even void your warranty!
Table of Contents
Chapter 1 Preparation ........................................................................ 1
Check the shipment............................................................................... 1
Torque specifications............................................................................. 1
Table 1 Torque specifications ..................................................... 1
Check the parts..................................................................................... 1
Set up the mounting location. ................................................................ 1
Tower-leg mount.............................................................................. 2
Support-pipe mount.......................................................................... 2
Top-mounted support pipe................................................................ 2
Preparing the tower leg or mounting pipe .......................................... 2
Figure 1 Mounting options.......................................................... 3
Figure 2 Tower layout, single antenna bay .................................. 4
Figure 3 Tower layout, two-bay antenna ..................................... 5
Figure 4 Tower layout, three-bay antenna ................................... 6
Figure 5 Tower layout, four-bay antenna..................................... 7
Figure 6 Tower layout, five-bay antenna ..................................... 8
Figure 7 Tower layout, six-bay antenna....................................... 9
Figure 8 Tower layout, eight-bay antenna ................................. 10
Figure 9 Top mounted installation............................................. 11
Figure 10 Proper (and improper) securing of bay cables ............. 12
Chapter 2 Bay Assembly................................................................... 13
Attach the mount to the bay weldment ................................................. 13
Mounting pipe size to 3-1/2 inches outside diameter:........................ 13
Mounting pipe size 3-1/2 inches to six inches outside diameter:......... 13
Figure 11 Mount attachment, pipe size up to 3-1/2 inches .......... 14
Table 2 Mounting U-bolt usage ................................................ 14
Figure 12 Mount attachment, pipe size 3-1/2" to 6".................... 15
Attach the bay arms. ........................................................................... 15
Figure 13 Bay arm attachment.................................................. 16
Attach the bay cable (single-bay antenna only) ..................................... 16
Attach the feedstraps to the endseal. ................................................... 16
Figure 14 Bay cable & feedstrap attachment (bay cable for single-bay
antenna only) ................................................................. 17
Chapter 3 Mounting the Antenna Bay(s) ......................................... 19
Tower leg or mounting pipe up to 3-1/2 inches outside diameter:........... 19
Figure 15 Bay mounting on pipe up to 3-1/2 inches OD.............. 19
Tower leg or mounting pipe 3-1/2 to 6 inches outside diameter: ............ 20
Figure 16 Bay mounting on pipe 3-1/2" - 6" OD ........................ 20
Chapter 4 Connecting the Antenna (single-bay).............................. 21
Connect the antenna bay..................................................................... 21
Figure 17 Single bay antenna connection .................................. 21
i
Table of Contents
Chapter 5 Connecting the Antenna (2- to 6-bay) ............................ 23
Mount the power divider...................................................................... 23
Figure 18 Power divider mounting............................................. 23
Install the slugged line section (if applicable). ....................................... 24
Figure 19 Slugged line section installation (if applicable)............. 25
Install the optional fine-matching transformer (if applicable) .................. 26
Figure 20 Fine-matching transformer installation........................ 27
Connect the antenna bay cables........................................................... 28
Figure 21 Antenna bay cable connection ................................... 28
Connect the tower transmission line. .................................................... 29
Figure 22 Tower transmission line connection ............................ 29
Chapter 6 Connecting the Antenna (8-bay) ..................................... 31
Mount the power dividers. ................................................................... 31
Install the slugged line section (if applicable). ....................................... 31
Figure 23 Power divider mounting for 8-bay antenna ................. 32
Figure 24 Slugged line section installation (if applicable)............. 33
Install the optional fine-matching transformer (if applicable) .................. 34
Figure 25 Fine-matching transformer installation........................ 35
Connect the antenna bay cables........................................................... 36
Figure 26 Antenna bay cable connection ................................... 36
Connect the tower transmission line. .................................................... 37
Figure 27 Tower transmission line connection ............................ 38
Chapter 7 Installing the De-icer System (if applicable)................... 39
Precautions......................................................................................... 39
De-icer system description ................................................................... 39
Dual-setting thermostat .................................................................. 39
Electric power ................................................................................ 39
Table 3 De-icer specifications .................................................. 39
De-icer installation .............................................................................. 40
Installing the de-icer junction boxes. ............................................... 40
Figure 28 De-icer junction box installation ................................. 40
Figure 29 Junction box installed on antenna bay ........................ 41
Installing the interbay cables.......................................................... 41
Figure 30
Figure 31
Figure 32
Figure 33
Figure 34
Interbay cable section, bottom end ............................ 41
Sheath cut back........................................................ 42
Sheath bent back over the grommet .......................... 42
Final assembly, top of second junction box ................. 42
De-icer electrical schematic diagram........................... 43
Installing the tower junction box ..................................................... 44
Installing the thermostat (if applicable) ............................................ 44
Table 4 Thermostat readings .................................................... 44
ii
Table of Contents
Chapter 8 Retuning .......................................................................... 45
Before beginning retuning: .................................................................. 45
Setup ................................................................................................. 45
Tuning ............................................................................................... 46
Figure 35
Figure 36
Figure 37
Figure 38
Arm length and feed strap angle vs. frequency ........... 46
Optimal VSWR at 108 MHz, narrow feedstrap ............. 47
Optimal VSWR at 108 MHz, wide feedstrap ................. 48
Optimal VSWR at 88 MHz, wide feedstrap................... 49
Chapter 9 Startup............................................................................. 51
Initial characterization ......................................................................... 51
Before beginning initial characterization: .......................................... 51
Read transmission line VSWR. ......................................................... 51
Read transmission line TDR............................................................. 51
Read system VSWR. ....................................................................... 51
Impedance trimming. .......................................................................... 52
Figure 39 Impedance-matching transformer .............................. 52
Checkout. ........................................................................................... 53
Operation. .......................................................................................... 53
Figure 40 Apply the signal. ....................................................... 54
Chapter 10 Maintenance .................................................................. 55
Log .................................................................................................... 55
Inspection .......................................................................................... 55
Paint .................................................................................................. 55
Return policy ...................................................................................... 55
Troubleshooting .................................................................................. 55
Broad spectrum RF noise. ............................................................... 55
High VSWR .................................................................................... 55
Change in coverage ........................................................................ 55
Chapter 11 Parts .............................................................................. 57
Bay components
(without de-icers) ............................................................ 57
Table 5 Components, antenna bay without de-icer (per bay) ..... 57
Figure 41 Components, 6822 bay (without de-icers)................... 58
De-Icer Components ........................................................................... 59
Table 6 Components, de-icer (per bay) ..................................... 59
Figure 42 Components, 6822 de-icer......................................... 59
Mounting system components .............................................................. 60
Up to 3-1/2" mounting pipe OD:...................................................... 60
Table 7 Components, mounts for up to 3-1/2" mounting pipe
(per antenna bay) .......................................................... 60
Figure 43 Components, mounts for up to 3-1/2" mounting pipe .. 60
3-1/2" - 6" mounting pipe OD: ........................................................ 61
Table 8 Components, mounts for 3-1/2" to 6" mounting pipe
(per antenna bay) .......................................................... 61
Figure 44 Components, mounts for 3-1/2" to 6" mounting pipe... 62
iii
Table of Contents
Feed system components .................................................................... 63
Table 9 Components, feed system for single-bay antenna ....... 63
Table 10 Components, feed system for 2-bay antenna 
(per array) .................................................................. 63
Table 11 Components, feed system for 3-bay antenna 
(per array) .................................................................. 63
Figure 45 Feed system components for 2- to 6-bay antennas...... 64
Table 12 Components, feed system for 4-bay antenna 
(per array) .................................................................. 65
Table 13 Components, feed system for 5-bay antenna 
(per array) .................................................................. 65
Table 14 Components, feed system for 6-bay antenna 
(per array) .................................................................... 65
Table 15 Components, feed system for 8-bay antenna 
(per array) .................................................................. 66
Figure 46 Feed system components, 8-bay antenna ................... 67
Accessories and optional items............................................................. 68
Table 16 Accessories and optional items ................................... 68
Figure 47 Slugged line section (if applicable) components .......... 69
Figure 48 Fine-matching transformer (optional) components ...... 70
iv
Preparation
1
Preparation
Check the shipment.
As soon as you receive your antenna, BEFORE signing for the shipment:
a. Check to be sure all the material has arrived.
b. Check for evident damage to any of the boxes.
c. If any boxes are missing, or if any are obviously damaged, describe the
problem in a WRITTEN note on the shipping papers BEFORE signing them.
Then call Shively right away, and we’ll do everything we can to correct the
situation.
Important!
Never store the antenna system outdoors, boxed or otherwise. Take
pains to keep the antenna components dry. You will need to purge moisture from the interior of the antenna components if they get wet.
Torque specifications.
NOTE
Use an anti-seize compound to minimize galling on stainless steel
threads.
Table 1. Torque specifications
Hardware size
Check the parts.
Torque (dry)
Torque (lubricated)
5/16-18 (1-5/8" EIA flanges)
132 in-lbf (14.9 N-m) 112 in-lbf (12.7 N-m)
3/8-16 (2-1/8", 3-1/8" EIA
flanges)
236 in-lbf (26.7 N-m) 201 in-lbf (22.7 N-m)
7/16 DIN (antenna input fitting)
18 - 22 lb-in (21 - 25
cm-kg)
n/a
Check to be sure all the parts listed in Chapter 11, as applicable, have arrived
in good condition.
NOTE
Item callouts are consistent across all the illustrations in this manual.
Set up the mounting
location.
Remember!
It is YOUR responsibility to ensure that your installation meets all applicable codes and the centerline-of-radiation requirements of your FCC
construction permit.
CAUTION
Important
Improper antenna mounting is a leading cause of
poor performance in 6822
antennas.
It is very
important to install the
antenna as indicated and
to position it away from
other metallic structures.
Before attaching the pipe mounts to the tower, scrape away tower paint
to ensure good electrical contact. If you don’t, the antenna may generate unwanted electrical signals, and performance may be degraded.
CAUTION
Watch for tower components that might interfere with your installation.
Mounting is a little different for tower-leg mounting, support-pipe mount, and
top-mounted poles.
1
Preparation
Tower-leg mount
The 6822 antenna may be mounted on a tower leg if the tower has at least
18" face width. The width is necessary to allow separation between the
antenna and the power divider, as shown in Figure 1a.
The tower leg must extend at least five feet (1500 mm) above the top bay
and five feet below the bottom bay.
Figure 2 shows the mounting, cable run of a typical side-mounted single-bay
antenna.
Support-pipe mount
An alternative is to mount to a customer-supplied vertical pipe (Figure 1b),
which in turn is mounted on the tower. The pipe must be between 2-3/8” and
3-1/2” (60 and 89 mm) nominal outside diameter and mounted at least 16" off
the tower.
The mounting pipe must extend at least five feet (1500 mm) above the top
bay and five feet below the bottom bay.
Figure 3 through Figure 8 show support-pipe mounting for two- through eightbay antennas.
NOTE
Shively can accommodate other pipe sizes if necessary by special order.
Top-mounted support pipe
NOTE
This mounting method can only be used for a single-bay antenna,
because it allows no location to mount a power divider.
If your support pipe is mounted on top of a tower or building (Figure 9),
locate the antenna with at least ten feet (3.1 m) of vertical clearance between
the bottom antenna bay and the top of the tower or building. Then mount the
pipe in accordance with the guidelines above.
Preparing the tower leg or
mounting pipe
CAUTION
If you don't get good electrical contact between the
mounts, the support pipe,
and the tower, the
antenna may not perform
as designed and may produce stray signals that will
interfere with other services on the tower.
Prepare the mounting location as follows (see Figure 10):
a. Starting at the top of the support pipe, mark the location of each bay in
accordance with the installation drawing.
b. Also, mark the specified location of any accessory mounts (eg: de-icer box
mounts), to make sure they will fit as planned.
c. To ensure good electrical contact between the support pipe and the tower,
remove the tower paint and any rust at the support pipe mount locations
before installing the mounts. After installing the mounts, be sure to touch up
the paint where you removed it.
2
Preparation
Figure 1. Mounting options
3
Preparation
Figure 2. Tower layout, single
antenna bay
4
Preparation
Figure 3. Tower layout, two-bay
antenna
5
Preparation
Figure 4. Tower layout, threebay antenna
6
Preparation
Figure 5. Tower layout, four-bay
antenna
7
Preparation
Figure 6. Tower layout, five-bay
antenna
8
Preparation
Figure 7. Tower layout, six-bay
antenna
9
Preparation
Figure 8. Tower layout, eightbay antenna
10
Preparation
Figure 9. Top mounted
installation
11
Preparation
Figure 10. Proper (and
improper) securing of bay cables
12
Bay Assembly
2
Bay Assembly
Attach the mount to
the bay weldment
Mounting pipe size to 3-1/2
inches outside diameter:
NOTE
For mounting pipes between 3-1/2" and 6" diameter, see the next section.
NOTE
The mount is reversible and can be attached to either side of the bay
weldment.
a. Using two screws (Figure 12, 1) with hardware (2, 3, and 4), attach the balun
mount (29) to the bay weldment (5) as shown. Tighten in accordance with
Table 1 on page 1.
b. Using the two 1"-pipe U-bolts (30) with hardware (2, 3, and 4), secure the
balun mount to the bay weldment. Tighten in accordance with Table 1.
c. With reference to Table 2, determine which size mount U-bolts you will be
using.
d. Insert two mounting U-bolts (31 or 32 - but not both!) into the slots in the
mount. Install the hardware (33, 34, and 35) loosely onto the U-bolts.
Discard the unused U-bolts.
Mounting pipe size 3-1/2
inches to six inches outside
diameter:
NOTE
For mounting pipes up to 3-1/2" diameter, see the previous section.
NOTE
The mount is reversible and can be attached to either side of the bay
weldment.
a. Using two screws (Figure 12, 1) with hardware (2, 3, and 4), attach the balun
mount (36) to the bay weldment (5) as shown. Tighten in accordance with
Table 1 on page 1.
b. Using the two 1"-pipe U-bolts (30) with hardware (2, 3, and 4), secure the
balun mount to the bay weldment. Tighten in accordance with Table 1.
c. Using the galvanized 5/8" hardware (Figure 12, 37, 38, and 39), attach the
threaded rods (40) to the balun mount.
NOTE
Mount antenna bays with feed straps up, clear of all guylines and other
obstructions.
d. Using the galvanized 5/8" hardware, attach the support clamps (41) loosely
to the threaded rods (40).
13
Bay Assembly
Figure 11. Mount attachment,
pipe size up to 3-1/2 inches
Table 2. Mounting U-bolt usage
Mounting pipe size
U-bolt size
Up to 2 inches (5.1 cm)
outside diameter
2 in (6.35 cm)
2 to 4 in (5 to 10.2 cm)
4 in (10.2 cm)
4 to 6 in (10 to 15.2 cm)
See Figure 12
14
Bay Assembly
Figure 12. Mount attachment,
pipe size 3-1/2" to 6"
Attach the bay arms.
CAUTION
Do not loosen the hose clamps or move the sliding V-arms. This will spoil
the performance of your antenna.
a. Locate the inner and outer dipole arms (Figure 13, 7). The sliding V-arms
(18) on each dipole arm are factory-assembled and adjusted for proper
performance (all the same), and secured with hose clamps (19).
b. Using upper arm clamps (6) and 5/16-18 hardware (1, 2, 3, and 4), attach
the two dipole arms (7) to the saddles on the bay weldment (5) as shown.
Tighten in accordance with Table 1.
15
Bay Assembly
Figure 13. Bay arm attachment
Attach the bay cable
(single-bay antenna
only)
NOTE
If your antenna has more than one bay, skip this section and go on to
Attach the feedstraps to the endseal.
a. Attach the angled connector of the bay cable section (Figure 14 on page 17,
8) to the base of the endseal (9).
b. Pass the cable under the arm saddle to the mount end of the weldment.
Secure it firmly to the weldment, using tie-wraps (44).
Attach the feedstraps
to the endseal.
NOTE
The feedstraps are shipped in place on the dipole arms.
a. Remove the wingnut and washers from the endseal (Figure 14, 9) (the white
plastic dome on the antenna weldment).
CAUTION
Do NOT move the feedstrap clips on the sliding V-arms. The antenna
was tuned with the clips in place. If you move them, the antenna will not
work as expected.
b. Loosen the feedstrap clip hardware (10) just enough to swing the feedstraps
(11) into place over the endseal.
c. Place the slots in the feedstraps over the endseal stud and reinstall the
endseal washers and the wingnut. Be sure to reinstall the brass washer (12)
as shown. Tighten the wingnut.
16
Bay Assembly
Figure 14. Bay cable & feedstrap
attachment (bay cable for
single-bay antenna only)
d. Tighten the feedstrap clip hardware, only until the lock washer flattens. Do
not overtighten.
17
Mounting the Antenna Bay(s)
3
Mounting the Antenna Bay(s)
WARNING
Whenever a rigger is on the tower in the area of the antenna, shut off
the signal and lock it off so that it cannot be turned on accidentally. RF
emissions at close range are hazardous.
CAUTION
Do not attach the bays together with the RF cable before mounting
them. NEVER try to support the bays from the cable.
Tower leg or mounting
pipe up to 3-1/2 inches
outside diameter:
a. At the locations you marked on the mounting pipe (Set up the mounting
location. on page 1), scrape away any paint or other coating to achieve good
electrical contact.
NOTE
Mount antenna bays with feed straps up, clear of all guylines and other
obstructions.
b. Using the U-bolts (Figure 15, 31 or 32), attach the antenna bays at the
marked locations.
c. Repeat for the other antenna bay(s) as applicable.
d. Align the bays to the correct azimuth and align them vertically with each
other, then tighten the mounting hardware in accordance with Table 1 on
page 1.
e. Repaint the pipe as needed around the antenna bay mount.
Figure 15. Bay mounting on pipe
up to 3-1/2 inches OD
19
Mounting the Antenna Bay(s)
Tower leg or mounting
pipe 3-1/2 to 6 inches
outside diameter:
a. At the locations you marked on the mounting pipe (Set up the mounting
location. on page 1), scrape away any paint or other coating to achieve good
electrical contact.
NOTE
Mount antenna bays with feed straps up, clear of all guylines and other
obstructions.
b. Using the threaded rods (40), support clamps (41), and 5/8-11 galvanized
hardware (Figure 16, 37, 38, and 39), attach the antenna bays at the marked
locations. Tighten in accordance with Table 1 on page 1.
c. Repeat for the other antenna bay(s) as applicable.
d. Align the bays to the correct azimuth and align them vertically with each
other, then tighten the mounting hardware in accordance with Table 1 on
page 1.
e. Repaint the pipe as needed around the antenna bay mount.
Figure 16. Bay mounting on pipe
3-1/2" - 6" OD
NOTE
The Model 6822 does not require pressurization or purging. The feed
system up to the bay may be pressurized.
Proceed to Connecting the Antenna (single-bay) on page 21 or Connecting the
Antenna (2- to 6-bay) on page 23 as applicable.
20
Connecting the Antenna (single-bay)
4
Connect the antenna
bay.
Connecting the Antenna (single-bay)
The antenna bay is not pressurized. The feed system up to the bay may be
pressurized.
a. Provide a gas stop between the tower transmission line and the antenna
input if necessary.
b. Connect the tower DIN transmission cable to the input of the antenna bay
cable (Figure 17, 8). Tighten in accordance with Table 1 on page 1.
Figure 17. Single bay antenna
connection
c. Loop or drape any excess cable and secure it to the pipe, using tie-wraps
(44) or customer-supplied clamps, to prevent wind damage to the cables and
to ensure the weight of the cable is not carried by the antenna input.
NOTE
The Model 6822 bay does not require pressurization or purging.
Installation of your Model 6822 single-bay is now complete. Please proceed to
Startup on page 51.
21
Connecting the Antenna (2- to 6-bay)
5
Connecting the Antenna (2- to 6-bay)
Mount the power
divider.
Using a power divider mounting kit (Figure 18, 45), mount the power divider
(46, 49, 52, 55, or 58) to the mounting structure with its outlet ports roughly
halfway along the antenna array. Locate the mounts as close to the ends of
the power divider as you can.
NOTE
You may need to provide a coax adapter between your transmission line
and the power divider.
Figure 18. Power divider
mounting
NOTE
Two-way and 4-way feed
systems shown. Three,
five, and six-way feed systems are similar.
23
Connecting the Antenna (2- to 6-bay)
Install the slugged line
section (if applicable).
In the event your antenna has non-standard bay spacing or other special features, we may have provided you with a line section containing a "slug" to
perfect the tuning of the antenna. This piece is to be installed between the
output of the transformer (if applicable) and the input of the power divider.
CAUTION
Do not remove or modify the slug from the slugged line section. This will
ruin your antenna’s performance.
NOTE
Line section mounts are generally similar to feedline mounts and should
be installed in the same manner.
NOTE
You may need to provide a coax adapter between your transmission line
and the slugged line section.
Install the slugged line section (70 or 71, as applicable) at the input flange of
your power divider (Figure 20, 46, 49, 52, 55, or 58) as follows:
a. Ensure there is an inner conductor connector in the slugged line section
outlet flange.
b. Attach the mounts (45) to the slugged line section, close to the ends.
c. Coat the O-ring (43 or 54, as applicable) lightly with O-Lube (supplied with
the antenna), then install it in the O-ring groove in the outlet flange.
d. Mate the flanges and secure the slugged line section to the mounting pipe.
Do not fully tighten the mounts until the flange hardware is in place.
e. Install the flange hardware kit (42 or 53, as applicable) hardware and secure
the flange. Tighten in accordance with Table 1 on page 1.
f. Tighten the mount hardware in accordance with Table 1.
24
Connecting the Antenna (2- to 6-bay)
Figure 19. Slugged line section
installation (if applicable)
25
Connecting the Antenna (2- to 6-bay)
Install the optional
fine-matching
transformer (if
applicable)
One of the unique features of Shively Labs antenna systems is the adjustable
impedance-matching transformer (Figure 20, 72 or 73, as applicable) optionally available with the antenna. It allows the installer to compensate for
changes in the input impedance caused by the installation (tower, conduit,
ladder, etc.).
NOTE
The transformer may be oriented in whichever direction you wish (see
Figure 20). Make it easy to reach for adjustment at startup.
NOTE
Transformer mounts are generally similar to feedline mounts and should
be installed in the same manner.
NOTE
You may need to provide a coax adapter between your transmission line
and the fine-matching transformer.
Install the transformer at the input flange of your power divider (Figure 20,
46, 49, 52, 55, or 58, as applicable), or slugged line section (70 or 71, as
applicable), as follows:
a. Ensure there is an inner conductor connector in the transformer outlet
flange.
b. Attach the transformer mounts (45) to the transformer, close to the ends.
c. Coat the O-ring (43 or 54, as applicable) lightly with O-Lube (supplied with
the antenna), then install it in the O-ring groove in the transformer outlet
flange.
d. Mate the flanges and secure the transformer to the mounting pipe. Do not
fully tighten the mounts until the flange hardware is in place.
e. Install the flange hardware kit (42 or 53, as applicable) hardware and secure
the flange. Tighten in accordance with Table 1 on page 1.
f. Tighten the mount hardware in accordance with Table 1.
26
Connecting the Antenna (2- to 6-bay)
Figure 20. Fine-matching
transformer installation
27
Connecting the Antenna (2- to 6-bay)
Connect the antenna
bay cables.
CAUTION
Stressing a coax connection after assembly can detune the system.
Therefore, never make a connection and then bend or twist the cable, or
use the connector to force the coax into shape. Form the cable first,
then attach it to the connector.
CAUTION
The minimum single bending radius for HCA78-50J coax is 4" (100 mm).
The repeated bending radius is 10" (250 mm). Do not bend it too tightly;
you may damage it.
CAUTION
The minimum bending radius for 1/2" coax is 3" (8 cm). Do not bend it
too tightly; you may damage it.
CAUTION
Do not overtighten the connectors. Overtightening may damage them.
a. Connect the output end (90° connectors) of the antenna bay cable (47, 50,
56, or 59) to the DIN connector at the bottom of the endseal.
Figure 21. Antenna bay cable
connection
b. Run the cable along the antenna weldment and secure it, using tie-wraps
(44), so as to prevent it moving and chafing against the U-bolt or other
surfaces.
c. Connect the input end of the antenna bay cable to the power divider DIN
outputs.
d. Secure the cable to the mounting pipe or tower leg, using tie-wraps or
customer-supplied cable clamps.
e. Repeat for the other antenna bay(s).
28
Connecting the Antenna (2- to 6-bay)
Connect the tower
transmission line.
a. The antenna system is not pressurized, but the tower transmission line may
be. If necessary, provide a gas stop between the tower transmission line and
the system input (power divider input, or transformer input if applicable).
b. Coat the O-ring (54) lightly with O-Lube (supplied with the antenna), then
install it in the O-ring groove in the flange.
c. Using the 1-5/8" EIA flange hardware kit (Figure 22, 45), attach the tower
transmission cable to the power divider (or transformer) input. Tighten in
accordance with Table 1 on page 1.
d. Secure the tower transmission cable to the mounting pipe or tower leg, using
tie-wraps or customer-supplied cable clamps.
Figure 22. Tower transmission
line connection
29
e. Loop or drape any excess cable and tie-wrap it to the pipe, to prevent wind
damage to the cables and to ensure the weight of the cable is not carried by
the antenna input.
NOTE
The Model 6822 antenna does not require pressurization or purging. The
feed system up to the power divider may be pressurized.
Installation of your Model 6822 2- to 8-bay antenna is now complete. Please
proceed to Startup on page 51.
Connecting the Antenna (8-bay)
6
Mount the power
dividers.
Connecting the Antenna (8-bay)
a. Using two mount bases (Figure 23, 63), two saddles (64), and two hose
clamps (65), mount the 1-5/8" 2-way power divider (62) onto the mounting
structure with its outlet end roughly halfway between bays 4 and 5. Locate
the mounts as close to the ends of the power divider as you can.
NOTE
You may have to provide short threaded rod sections to fit the 7/8" 7/8" power dividers to the mounting structure.
b. Using lightly lubricated O-rings (43) and flange hardware kits (42), attach the
7/8" transmission line sections (66 or 67, as applicable) to the outlet flanges
of the 2-way power divider (62). Secure them to the mounting pole, using
power divider mounting kits (45).
c. Using lightly lubricated O-rings (43) and flange hardware kits (42), attach the
7/8" to 7/8" power dividers (46, 49, 52, 55, or 58) to the outlet flanges of
the transmission line sections. Secure them to the mounting pole, using
power divider mounting kits (45).
Install the slugged line
section (if applicable).
In the event your antenna has non-standard bay spacing or other special features, we may have provided you with a line section containing a "slug" to
perfect the tuning of the antenna. This is to be installed between the output
of the transformer (if applicable) and the input of the power divider.
CAUTION
Do not remove or modify the slug from the slugged line section. This will
ruin your antenna’s performance.
NOTE
Line section mounts are generally similar to feedline mounts and should
be installed in the same manner.
Install the slugged line section (Figure 23, 71) at the input flange of your
power divider (62) as follows:
a. Ensure there is an inner conductor connector in the slugged line section
outlet flange.
b. Attach the mounts (45) to the slugged line section, close to the ends.
c. Coat the O-ring (54) lightly with O-Lube (supplied with the antenna), then
install it in the O-ring groove in the outlet flange.
d. Mate the flanges and secure the slugged line section to the mounting pipe.
Do not fully tighten the mounts until the flange hardware is in place.
e. Install the flange hardware kit (53) hardware and secure the flange. Tighten
in accordance with Table 1 on page 1.
f. Tighten the mount hardware in accordance with Table 1.
31
Connecting the Antenna (8-bay)
Figure 23. Power divider
mounting for 8-bay antenna
32
Connecting the Antenna (8-bay)
Figure 24. Slugged line section
installation (if applicable)
33
Connecting the Antenna (8-bay)
Install the optional
fine-matching
transformer (if
applicable)
One of the unique features of Shively Labs antenna systems is the adjustable
impedance-matching transformer (Figure 25, 73) optionally available with the
antenna. It allows the installer to compensate for changes in the input impedance caused by the installation (tower, conduit, ladder, etc.).
NOTE
The transformer may be oriented in whichever direction you wish (see
Figure 25). Make it easy for yourself to reach for adjustment at startup.
NOTE
Transformer mounts are generally similar to feedline mounts and should
be installed in the same manner.
NOTE
You may need to provide a coax adapter between your transmission line
and the fine-matching transformer.
Install the transformer at the input flange of your power divider (62) or
slugged line section (71) if applicable, as follows:
a. Ensure there is an inner conductor connector in the transformer outlet
flange.
b. Attach the transformer mounts (45) to the transformer, close to the ends.
c. Coat the O-ring (54) lightly with O-Lube (supplied with the antenna), then
install it in the O-ring groove in the transformer outlet flange.
d. Mate the flanges and secure the transformer to the mounting pipe. Do not
fully tighten the mounts until the flange hardware is in place.
e. Install the flange hardware kit (53) hardware and secure the flange. Tighten
in accordance with Table 1 on page 1.
f. Tighten the mount hardware in accordance with Table 1.
34
Connecting the Antenna (8-bay)
Figure 25. Fine-matching
transformer installation
35
Connecting the Antenna (8-bay)
Connect the antenna
bay cables.
CAUTION
Stressing a coax connection after assembly can detune the system.
Therefore, never make a connection and then bend or twist the cable, or
use the connector to force the coax into shape. Form the cable first,
then attach it to the connector.
CAUTION
The minimum single bending radius for HCA78-50J coax is 4" (100 mm).
The repeated bending radius is 10" (250 mm). Do not bend it too tightly;
you may damage it.
CAUTION
The minimum bending radius for 1/2" coax is 3" (8 cm). Do not bend it
too tightly; you may damage it.
CAUTION
Do not overtighten the connectors. Overtightening may damage them.
a. Connect the output end (90° connectors) of the antenna bay cable (47, 50,
56, or 59) to the DIN connector at the bottom of the endseal.
Figure 26. Antenna bay cable
connection
b. Run the cable along the antenna weldment and secure it, using tie-wraps
(44), so as to prevent it moving and chafing against the U-bolt or other
surfaces.
c. Connect the input end of the antenna bay cable to the power divider DIN
outputs.
d. Secure the cable to the mounting pipe or tower leg, using tie-wraps or
customer-supplied cable clamps.
e. Repeat for the other antenna bay(s).
36
Connecting the Antenna (8-bay)
Connect the tower
transmission line.
NOTE
You may need to provide a coax adapter between your transmission line
and the antenna components.
a. The antenna system is not pressurized, but the tower transmission line may
be. If necessary, provide a gas stop between the tower transmission line and
the system input (power divider input, or transformer input if applicable).
b. Coat the O-ring (43 or 54, as applicable) lightly with O-Lube (supplied with
the antenna), then install it in the O-ring groove in the flange.
c. Using the flange hardware kit (42 or 53, as applicable), attach the tower
transmission cable to the power divider (or transformer) input. Tighten in
accordance with Table 1 on page 1.
d. Secure the tower transmission cable to the mounting pipe or tower leg, using
tie-wraps or customer-supplied cable clamps.
e. Loop or drape any excess cable and tie-wrap it to the pipe, to prevent wind
damage to the cables and to ensure the weight of the cable is not carried by
the antenna input.
NOTE
The Model 6822 antenna does not require pressurization or purging. The
feed system up to the power divider may be pressurized.
Installation of your Model 6822 2- to 8-bay is now complete. Please proceed
to Startup on page 51.
37
Connecting the Antenna (8-bay)
Figure 27. Tower transmission
line connection
38
Installing the De-icer System (if applicable)
7
Installing the De-icer System (if applicable)
Precautions
WARNING
Installation should be performed only by personnel
experienced in RF systems, qualified in electrical work, and familiar
with this equipment.
WARNING
Don't expose personnel to the medical hazards of intense radio frequency (RF) radiation. Whenever working on the tower in the area of
the antenna, turn off all transmitters and lock them out so that they cannot be turned on accidentally.
CAUTION
All parts of the de-icer system within approximately 20 feet (6 meters) of
any radiator must be shielded from RF energy, and the entire outdoor
portion of the system must be made waterproof.
CAUTION
An improperly installed de-icer can overheat and damage your antenna.
De-icer system
description
The de-icer system consists of the heating elements in the bays, their branch
cables, a bay junction box for each antenna bay, interbay cables, and a "pigtail" of wires about 10 feet (3 meters) long which you will connect to the
tower junction box you are to provide. The following will help in installation:
• System electrical schematic: Figure 34 on page 43.
• Electrical specifications: Table 3 on page 39.
• Thermostat readings: Table 4 on page 44.
Your system may also include specially-ordered items, such as a groundmounted main control box, a power cable extending up the tower, or a towermounted dual-setting thermostat.
Dual-setting thermostat
CAUTION
Remember that conditions may be favorable for icing on the tower, even
if they are not on the ground.
Shively Labs deicers are designed to prevent ice from forming on antenna elements and are not designed to melt ice that has already formed. For this reason, Shively Labs recommends that the system be installed with a towermounted dual-setting thermostat assembly (Shively Labs Model 55522-G502)
and de-icer control box (Shively Labs Model 94068) that ensure the deicers
are operated in the temperature range ice is most likely to form.
Electric power
The de-icer system requires 240 VAC, 50 - 60 Hz., single-phase. Table 3 shows
approximate heater leg resistances and current draw, respectively.
Table 3. De-icer specifications
Heater leg
resistance, 
Heater leg (T1 or T2)
current draw, amps
1-Bay
288
0.42
2-Bay
144
0.84
3-Bay
96
1.3
4-Bay
72
1.7
5-Bay
57
2.1
6-Bay
48
2.5
39
Installing the De-icer System (if applicable)
Table 3. De-icer specifications (continued)
8-Bay, single circuit
Heater leg
resistance, 
Heater leg (T1 or T2)
current draw, amps
36
3.3
De-icer installation
Installing the de-icer
junction boxes.
a. Insert the electrical leads (Figure 28, 23) from the antenna mast through the
side port of the junction box.
Figure 28. De-icer junction box
installation
b. Screw the junction box onto the threaded end of the antenna mast as shown
(Figure 29). Tighten the jam nut against the junction box.
40
Installing the De-icer System (if applicable)
Figure 29. Junction box installed
on antenna bay
NOTE
The access cover of the junction box may be positioned on the left or
right side.
c. (Top bay only) Using PTFE tape to seal the opening, install the pipe plug
(Figure 28, 26) in the top port of the junction box.
Installing the interbay
cables.
a. Examine an interbay cable section (Figure 28, 23). It consists of a liquid-tight
connector (28): a gland, a retainer, a bushing, and a body, all strung on each
end of a length of cable.
b. Identify the top end and the bottom end of the cable section. At the top end,
the components are pre-assembled and tightened.
c. At the bottom end (Figure 30), the components are only loosely assembled
and the outer cable insulation and the braided sheath have been cut back to
the proper length at the factory.
Figure 30. Interbay cable
section, bottom end
d. Install the top end of the cable section:
(1) Apply PTFE tape to the body threads on the top end.
(2) Turning the entire cable section, screw the top end into the bottom port
of the topmost junction box. Tighten.
e. Install the bottom end of the cable section:
(1) Remove the body from the cable assembly. Using PTFE tape, install the
body into the port at the top of the second junction box. Tighten.
(2) Using scissors, slit the braided sheath (Figure 31) to the end of the
insulation.
41
Installing the De-icer System (if applicable)
Figure 31. Sheath cut back
(3) Slide the grommet to the end of the insulation. Unravel the sheath as
necessary and bend it back over the grommet (Figure 32).
Figure 32. Sheath bent back
over the grommet
(4) Insert the leads through the body and the top port of the second
junction box.
(5) Press the bushing (unraveled sheath and all) into the body (Figure 33).
Then screw the cable gland over the retainer and onto the bushing and
tighten.
Figure 33. Final assembly, top of
second junction box
42
Installing the De-icer System (if applicable)
Figure 34. De-icer electrical
schematic diagram
NOTE
Customer-supplied items
are shown in broken lines.
NOTE
Wire nuts, cover with
screws, and gaskets, and
tie-wraps are provided
with the de-icer cable sections.
CAUTION
Shively Labs's de-icer
control box, Model 94068,
is designed for interior
installation only.
43
Installing the De-icer System (if applicable)
f. Inside each junction box, connect the leads as shown in Figure 28, using wire
nuts (7) to secure the connections.
g. Repeat for the remaining bays, junction boxes, and interbay cables.
h. Secure the interbay cables to the mounting pipe or tower leg, using tiewraps.
i. Connect the 10-foot pigtail at the bottom of the bottommost junction box.
Installing the tower
junction box
CAUTION
It is important to ground both the tower junction box and the control
box, as shown in the schematic diagrams.
a. Furnish a tower junction box as shown schematically in Figure 34 to connect
the antenna’s de-icer harness to the main power.
b. Run the ten-foot de-icer pigtail to the tower junction box and secure it to the
mounting pipe and/or the tower.
Installing the thermostat
(if applicable)
If you are using a thermostat, you may locate and mount it at your discretion.
We recommend mounting it as close as practical to the antenna.
CAUTION
When testing the thermostat, be sure to have one or both thermostat
leads disconnected before taking resistance readings. Otherwise, readings may be affected by other components.
a. Before you connect the thermostat, measure the resistance across the
thermostat circuit and from it to ground to ensure that there are no shortcircuits. Thermostat readings should be as shown in Table 4 on page 44.
b. Mount the thermostat near the antenna and connect the thermostat leads to
points S1 and S2 in the control box as shown in the schematic diagram,
Figure 34.
Table 4. Thermostat readings
Reading
Location
Ambient
Temperature
Resistance =
0 ohms
(short circuit)
Resistance =
infinite ohms
(open circuit)
Any
Defective thermostat or shorted
leads
OK
Above about 38° F
(3.3° C)
Defective thermostat or shorted
leads
OK
Between about 10°
and about 38° F
(-6.7° to 3.3° C)
OK
Defective thermostat or broken leads
Below about 10° F
(-6.7° C)
Defective thermostat or shorted
leads
OK
Leg-toGround
Leg-to-Leg
44
Retuning
8
Retuning
If you are re-using an existing antenna at a different frequency, or setting up
a used antenna at your site, you will need to retune the antenna to your
needs.
Before beginning
retuning:
Important
In the days before the hazards of intense RF power were realized, it was
common practice to have a technician climb the tower and adjust the
impedance match using the transmitter as a signal source and reading
the VSWR or return power on the transmitter. This practice MUST NOT
be used, as few transmitters can be operated at a low enough power
level to avoid exposing the rigger to an unsafe RF level. For reference,
see 29 CFR, Section 1910.97, the OSHA standard for exposure to nonionizing radiation.
To test and adjust VSWR safely, use low-power test equipment, such as
a network analyzer. If you don't have access to low-power test equipment, please call Shively Labs before proceeding.
WARNING
Whenever a rigger is on the tower in the area of the antenna, shut off
the transmitter signal and lock and tag it out so that it cannot be turned
on accidentally.
Low-power test equipment should be used to prevent excessive radiation exposure to the person doing the adjusting.
A high transmission line VSWR may indicate damaged transmission line and is
likely to cause problems in the future, including serious damage to your equipment.
Setup
a. Adjust the arm lengths and feed straps to the settings in Figure 35. This is a
good starting point.
b. Install the radiators on the tower leg or mounting pipe at the specified bayto-bay spacing (full-wave 118", half-wave 60". Special spacing in accordance
with specification - contact the factory if necessary).
c. Attach the feed cables to each bay in turn and dress cables along the tower
leg or mounting pipe (do not leave them hanging loosely in the RF field).
Attach the power divider near the bottom bay of the array using the saddle
"C" clamps and hose clamps. Coil the excess feed cables at the power divider
to the smallest diameter allowable with the minimum repeatable bend radius
for the cable being used.
NOTE
If the array is half-wave or special spaced the power divider input may
need to be slugged - contact the factory.
45
Retuning
Tuning
Figure 35. Arm length and feed
strap angle vs. frequency
a. Tweak for minimum VSWR from there (see Chapter 9). The specification is
less than 1.2:1 (Figure 36, Figure 37, and Figure 38).
46
Retuning
Figure 36. Optimal VSWR at 108
MHz, narrow feedstrap
47
Retuning
Figure 37. Optimal VSWR at 108
MHz, wide feedstrap
48
Retuning
Figure 38. Optimal VSWR at 88
MHz, wide feedstrap
49
Startup
9
Startup
We strongly recommend initial characterization as the best way to identify
both initial problems and possible future system damage.
Initial characterization
Before beginning initial
characterization:
Important
In the days before the hazards of intense RF power were realized, it was
common practice to have a technician climb the tower and adjust the
impedance match using the transmitter as a signal source and reading
the VSWR or return power on the transmitter. This practice MUST NOT
be used, as few transmitters can be operated at a low enough power
level to avoid exposing the rigger to an unsafe RF level. For reference,
see 29 CFR, Section 1910.97, the OSHA standard for exposure to nonionizing radiation.
To test and adjust VSWR safely, use low-power test equipment, such as
a network analyzer. If you don't have access to low-power test equipment, please call Shively Labs before proceeding.
WARNING
Whenever a rigger is on the tower in the area of the antenna, shut off
the transmitter signal and lock and tag it out so that it cannot be turned
on accidentally.
Low-power test equipment should be used to prevent excessive radiation exposure to the person doing the adjusting.
A high transmission line VSWR may indicate damaged transmission line and is
likely to cause problems in the future, including serious damage to your equipment.
Read transmission line
VSWR.
The first step is to characterize the transmission line by itself.
a. Briefly disconnect the transmission line from the antenna system input. Seal
the antenna system input to prevent the entry of moisture.
b. Terminate the coax transmission line in an instrument-quality 50-ohm load.
c. Measure and record the voltage standing wave ratio (VSWR) across the
operating band. File this information with this manual for future reference.
d. The VSWR of the transmission line should be within the manufacturer's
specifications. If it is, proceed. If not, you should call the manufacturer
before connecting the antenna. Problems must be worked out with the
design engineer on a case-by-case basis.
Read transmission line
TDR.
With the transmission line still terminated in 50 ohms, make a time domain
reflectometer (TDR) plot. Label and file the plot with this manual.
Read system VSWR.
You tested the VSWR of the transmission line alone. Now test the VSWR of the
system as a whole.
a. Remove the load and connect the transmission line to the antenna system
input.
b. Measure VSWR. VSWR at this point should be around 1.2 : 1 or better. If it
is not, check to be sure all the radiators are functioning (below).
c. Record the reading and file it with this manual.
51
Startup
Impedance trimming.
If your antenna is equipped with the optional Shively fine-matching transformer, adjust the transformer (Figure 39) as follows:
a. Loosen the hose clamps on the tuning stubs enough to allow the stubs to
move.
b. Grasp one of the tuning stubs and slide it in or out about 1/4 inch or 6
millimeters. It will move stiffly because of O-ring friction.
Figure 39. Impedance-matching
transformer
c. Read the VSWR. If the reading went down, move the control rod again in the
same direction. If the VSWR went up, move the same rod in the opposite
direction. Repeat until no further improvement is seen.
d. Adjust the second and third tuning stubs in the same manner.
NOTE
If you get "lost," return all three tuning stubs to the factory setting (all
the way out) and start over.
e. Return to the first tuning stub, and so forth, until you have the lowest
possible VSWR or return power reading. This is the optimal transformer
setting at this frequency.
f. VSWR for each frequency at this point should be below 1.2 : 1. If it is not,
call Shively Labs to help identify the problem.
g. When you have set the transformer, use a sharp point to scribe the shaft of
each control rod where it leaves the flange collar. Record the settings of the
control rods and file this information with this manual for future reference.
h. Tighten the hose clamps. If the clamps are left loose, vibration may change
the adjustments.
52
Startup
Checkout.
a. Before beginning checkout of the antenna system, be sure the following
items have been done:
• The antenna system has been installed in accordance with this
manual and the installation drawing.
• All radiators are operating and VSWR is within specification.
• The initial characterization data have been recorded.
• The system is gas-tight, purged, and pressurized.
b. Check the system out as follows:
(1) Bring up RF power slowly and observe transmitter readings, stability,
and general operation.
(2) Run at about half power for at least an hour, reading forward and
reflected power, stability, etc.
(3) If the system is stable and seems to be operating properly, bring it up
to full power. Take initial readings, and repeat the readings periodically.
c. Performance readings should not change, and there should be no evidence
of abnormal heating in the antenna system.
d. If any problem is found, fix it now. Call Shively Labs if you need help or
advice.
Operation.
Once the antenna has been installed and VSWR has been optimized, simply
apply the transmitter signal. Don’t exceed the rated power of the antenna.
53
Startup
Figure 40. Apply the signal.
54
Maintenance
10
Maintenance
WARNING
Whenever a rigger is on the tower in the area of the antenna, shut off
the signal and lock it off so that it cannot be turned on accidentally. RF
emissions at close range are hazardous.
Log
We recommend that you keep a log of VSWR readings and any other performance notes and maintenance history for your antenna. Such a record can be
invaluable for troubleshooting.
Inspection
Whenever a rigger is on the tower for any reason, it is a good idea to have
him check your antenna for general condition, looseness of connectors and
mounts, and electrical damage.
Paint
The radiator should never be painted; this will affect the VSWR.
Return policy
When returning any material to the factory, be sure to call your salesperson
and obtain an returned materials authorization (RMA) number first. Material
may be refused and sent back to you at your expense if you don’t do this.
Troubleshooting
Broad spectrum RF noise.
This indicates that some component is not in good electrical contact with the
tower. Make sure mounts are tight, that tower paint has been removed from
under the mounts, and that components of other systems are likewise in good
contact with the tower.
High VSWR
This is caused by any factor that changes the impedance match between the
antenna and the transmitter. Look for:
• Defective RF connector. Make sure connectors are in good shape,
and that center pins are not bent over.
• Damage to any antenna components.
• Paint on radiators.
• Ice buildup on radiators.
• Interference from other tower components, especially components
broken by wind or ice.
Change in coverage
This may be caused by the same factors that can cause high VSWR. Look for
VSWR changes as well.
Do recognize, however, that apparent changes in coverage may be due to subjective factors or faults of the receiving equipment. Before doing more than
checking the VSWR, be sure that an actual coverage change has occurred.
55
Parts
11
Parts
NOTE
Item numbers are consistent across all the illustrations in this technical
manual, with the exception of the assembly drawings in Appendix A.
Bay components
(without de-icers)
Table 5. Components, antenna bay without de-icer (per bay)
Part Number
Description
Qty.
1. 5/16-18SS036HM
Screw, hex head 5/16-18 x 2-1/4" SS
4
2. 5/16-18SS
Nut, hex 5/16-18 SS
4
3. 5/16SSF
Washer, flat 5/16" SS
8
4. 5/16SSS
Washer, split lock 5/16" SS
4
5. 97353-G502
Bay weldment
1
6. 97353-09
Clamp, upper arm
4
7. 97353-01
Arm, dipole
2
8. 99349-G5XXCABLE
(single-bay antenna only) Cable assembly,
7/16 DIN female to 90° 7/16 DIN male,
30" long
1
9. 99786-G502
Endseal assembly
1
10. 97353-07
Clip, feedstrap
2
11. 97353-10
Feedstrap
2
12. 96384-11
Washer, #10 endseal brass Bokers
2
13. 01/4-20SS016HM
Screw, hex head 1/4-20 x 1-1/4" SS
2
14. 01/4-20SS
Nut, hex 1/4-20 SS
2
15. 01/4SSF
Washer, flat 1/4" SS
4
16. 01/4SSS
Washer, split lock 1/4" SS
2
17. 96384-12
Washer, 1/4" brass Bokers
4
18. 99014-07
V-arm, sliding
4
19. 52750-M10H-1.13
OD
Clamp, hose
4
20. 0006-32SS
Nut, hex 6-32 SS
4
21. 0006SSS
Washer, split lock #6 SS
4
22. 0006SSFN
Washer, flat #6 narrow
4
57
Parts
Figure 41. Components, 6822
bay (without de-icers)
58
Parts
De-Icer Components
Table 6. Components, de-icer (per bay)
Part Number
Description
Qty.
23. 51299-G5XXX.XX
LG
De-icer bay-to-bay box cable assembly,
3-conductor with shield
1
24. 97353-12
Box, aluminum conduit tee
1
25. 2426-141
Locknut, 1/2" pipe
1
26. 52762-CUP-1
Plug, pipe, 1/2" NPT (end bay only)
1
27. 2426-RC55
Nut, wire, crimp-on
2
28. 2426-2521
Connector, liquid-tight, 1/2"
2
Figure 42. Components, 6822
de-icer
59
Parts
Mounting system
components
Up to 3-1/2" mounting
pipe OD:
NOTE
For mounting pipes between 3-1/2" and 6" diameter, see the next section.
Table 7. Components, mounts for up to 3-1/2" mounting pipe
(per antenna bay)
Part Number
Description
Qty.
29. 98141-07
Mount, balun for 1.50" - 3.50" OD pipe
1
30. 6384-16
U-bolt, 1" pipe
2
31. 55020-48
U-bolt, stainless 4.00"
2
32. 55020-49
U-bolt, stainless 2.50"
2
33. 03/8-16SS
Nut, hex 3/8-16 SS
8
34. 03/8SSF
Washer, flat 3/8" SS
8
35. 03/8SSS
Washer, split lock 3/8" SS
8
1. 5/16-18SS036HM
Screw, hex head 5/16-18 x 2-1/4" SS
2
2. 5/16-18SS
Nut, hex 5/16-18 SS
2
3. 5/16SSF
Washer, flat 5/16" SS
4
4. 5/16SSS
Washer, split lock 5/16" SS
2
Figure 43. Components, mounts
for up to 3-1/2" mounting pipe
60
Parts
3-1/2" - 6" mounting pipe
OD:
NOTE
For mounting pipes up to 4" diameter, see the previous section.
Table 8. Components, mounts for 3-1/2" to 6" mounting pipe
(per antenna bay)
Part Number
Description
Qty.
36. 98141-06
Mount, balun for 3-1/2" - 6-5/8" OD
1
1. 5/16-18SS036HM
Screw, hex head 5/16-18 x 2-1/4" SS
2
2. 5/16-18SS
Nut, hex 5/16-18 SS
2
3. 5/16SSF
Washer, flat 5/16" SS
4
4. 5/16SSS
Washer, split lock 5/16" SS
2
30. 6384-16
U-bolt, 1" pipe
2
37. G58NUT
Nut, hex 5/8-11 heavy galvanized
12
38. G58FW
Washer, flat 5/8 heavy galvanized
12
39. G58LW
Washer, split lock 5/8" galvanized
8
40. G58R-12
Rod, full threaded 5/8-11 galvanized
4
41. 98141-04
Clamp, support for 3-1/2" - 6-5/8" OD
2
61
Parts
Figure 44. Components, mounts
for 3-1/2" to 6" mounting pipe
62
Parts
Feed system
components
Table 9. Components, feed system for single-bay antenna
Part Number
Description
Qty.
42. 82912-G506
Kit, flange hardware, 7/8" flange
1
43. 9068-215
O-ring, silicone, 7/8" EIA flange
1
44. TY529MX
Tie-wrap
6
Table 10. Components, feed system for 2-bay antenna
(per array)
Part Number
Description
Qty.
45. 98162-G501
Kit, power divider mount, 7/8"
1
46. 078F-716X2
Power divider, 2-way 7/8" EIA flange to 
7/16 DIN male
1
42. 82912-G506
•
Kit, flange hardware, 7/8" flange
1
43. 9068-215
•
O-ring, silicone, 7/8" EIA flange
1
47. 97353-G505120.00
(Full-wave-spaced) Coax cable section, 10
ft (3.0 m) long, 7/16 DIN male on input end
and 90° 7/16 DIN male on output end
2
48. 97353-G50572.00
(Half-wave-spaced) Coax cable section, 6 ft
(1.83 m) long, 7/16 DIN male on input end
and 90° 7/16 DIN male on output end
2
44. TY529MX
Tie-wrap
12
Table 11. Components, feed system for 3-bay antenna
(per array)
Part Number
Description
Qty.
45. 98162-G501
Kit, power divider mount, 7/8" & 1-5/8"
1
49. 078F-716X3
Power divider, 3-way 7/8" EIA flange to 
7/16 DIN male
1
42. 82912-G506
•
Kit, flange hardware, 7/8" flange
1
43. 9068-215
•
O-ring, silicone, 7/8" EIA flange
1
50. 97353-G505240.00
(Full-wave-spaced) Coax cable section, 20
ft (6.1 m) long, 7/16 DIN male on input end
and 90° 7/16 DIN male on output end
3
51. 97353-G50596.00
(Half-wave-spaced) Coax cable section, 8 ft
(2.44 m) long, 7/16 DIN male on input end
and 90° 7/16 DIN male on output end
3
44. TY529MX
Tie-wrap
25
63
Parts
Figure 45. Feed system
components for 2- to 6-bay
antennas
64
Parts
Table 12. Components, feed system for 4-bay antenna
(per array)
Part Number
Description
Qty.
45. 98162-G501
Kit, power divider mount, 7/8" & 1-5/8"
1
52. 158F-716X4
Power divider, 4-way 1-5/8" EIA flange to
7/16 DIN male
1
53. 82912-G501
•
Kit, flange hardware, 1-5/8" flange
1
54. 9068-328
•
O-ring, silicone, 1-5/8" EIA flange
1
50. 97353-G505240.00
(Full-wave-spaced) Coax cable section, 20
ft (6.1 m) long, 7/16 DIN male on input end
and 90° 7/16 DIN male on output end
4
47. 97353-G505120.00
(Half-wave-spaced) Coax cable section, 10
ft (3.0 m) long, 7/16 DIN male on input end
and 90° 7/16 DIN male on output end
4
44. TY529MX
Tie-wrap
35
Table 13. Components, feed system for 5-bay antenna
(per array)
Part Number
Description
Qty.
45. 98162-G501
Kit, power divider mount, 7/8" & 1-5/8"
1
55. 158F-716X5
Power divider, 5-way 1-5/8" EIA flange to
7/16 DIN male
1
54. 82912-G501
•
Kit, flange hardware, 1-5/8" flange
1
55. 9068-328
•
O-ring, silicone, 1-5/8" EIA flange
1
56. 97353-G505336.00
(Full-wave-spaced) Coax cable section, 28
ft (8.54 m) long, 7/16 DIN male on input
end and 90° 7/16 DIN male on output end
5
57. 97353-G505168.00
(Half-wave-spaced) Coax cable section, 14
ft (4.27 m) long, 7/16 DIN male on input
end and 90° 7/16 DIN male on output end
5
44. TY529MX
Tie-wrap
50
Table 14. Components, feed system for 6-bay antenna
(per array)
Part Number
Description
Qty.
45. 98162-G501
Kit, power divider mount, 7/8" & 1-5/8"
1
58. 158F-716X6
Power divider, 6-way 1-5/8" EIA flange to
7/16 DIN male
1
54. 82912-G501
•
Kit, flange hardware, 1-5/8" flange
1
55. 9068-328
•
O-ring, silicone, 1-5/8" EIA flange
1
59. 97353-G505384.00
(Full-wave-spaced) Coax cable section, 32
ft (9.78 m) long, 7/16 DIN male on input
end and 90° 7/16 DIN male on output end
6
65
Parts
Table 14. Components, feed system for 6-bay antenna
(per array) (continued)
Part Number
Description
Qty.
60. 97353-G505228.50
(Half-wave-spaced) Coax cable section,
228-1/2 in (5.80 m) long, 7/16 DIN male on
input end and 90° 7/16 DIN male on output
end
6
44. TY529MX
Tie-wrap
70
Table 15. Components, feed system for 8-bay antenna
(per array)
Part Number
Description
Qty.
45. 98162-G501
Kit, power divider mount, 7/8" & 1-5/8"
4
61. 078F-716X4
Power divider, 4-way 7/8" EIA flange to 
7/16 DIN male
2
42. 82912-G506
•
Kit, flange hardware, 7/8" flange
2
43. 9068-215
•
O-ring, silicone, 7/8" EIA flange
2
62. 158F-078FX2
Power divider, 2-way 1-5/8" EIA flange to
7/8" EIA flange
1
54. 82912-G501
•
Kit, flange hardware, 1-5/8" flange
1
55. 9068-328
•
O-ring, silicone, 1-5/8" EIA flange
1
63. 98361-G501
Mount base assembly
2
64. 98359-G503
Saddle assembly, 1-5/8"
2
65. 6114-***
Clamp, hose
4
66. 078F-103-***
(Full-wave-spaced) Transmission line section, flanged, 7/8" x ***" long
2
67. 078F-103-***
(Half-wave-spaced) Transmission line section, flanged, 7/8" x ***" long
2
68. 97353-G505-***
(Full-wave-spaced) Coax cable section, ***
ft (*** m) long, 7/16 DIN male on input
end and 90° 7/16 DIN male on output end
8
69. 97353-G505-***
(Half-wave-spaced) Coax cable section,
*** ft (*** m) long, 7/16 DIN male on input end and 90° 7/16 DIN male on output
end
8
44. TY529MX
Tie-wrap
70
66
Parts
Figure 46. Feed system
components, 8-bay antenna
67
Parts
Accessories and
optional items
Table 16. Accessories and optional items
Part Number
Description
Qty.
70. Various
Line section, slugged, 7/8"
1
42. 82912-G506
•
Kit, flange hardware, 7/8" flange
1
43. 9068-215
•
O-ring, silicone, 7/8" EIA flange
1
71. Various
Line section, slugged, 1-5/8"
1
54. 82912-G501
•
Kit, flange hardware, 1-5/8" flange
1
55. 9068-328
•
O-ring, silicone, 1-5/8" EIA flange
1
72. 99952-G502
Transformer, fine matching, 7/8" EIA
1
42. 82912-G506
•
Kit, flange hardware, 7/8" flange
1
43. 9068-215
•
O-ring, silicone, 7/8" EIA flange
1
73. 99952-G502
Transformer, fine matching, 1-5/8" EIA
1
54. 82912-G501
•
Kit, flange hardware, 1-5/8" flange
1
55. 9068-328
•
O-ring, silicone, 1-5/8" EIA flange
1
45. 98162-G501
Kit, power divider mount, 7/8" & 1-5/8"
68
4
Parts
Figure 47. Slugged line section
(if applicable) components
69
Parts
Figure 48. Fine-matching
transformer (optional)
components
70
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