TY96/TY96A Installation Manual

TY96/96A and TY97/97A VHF Radio Installation Manual

01238-00

22 June 20177

Issue AE

The MIL reference for the basic style of hand tool is M22520/2-01. This style of tool can crimp many different contact types, and relies on interchangeable "positioners" to hold the actual contact in use.

The MIL reference for the positioner that you need for the crimps we supply is M22520/2-08.

Any tool that complies with these references can be used to crimp these contacts. One of the most popular vendors of these small hand tools is Daniels Manufacturing Corporation (see www.dmctools.com). Their AFM8 hand tool complies with M22520/2-01, and their K13-1 positioner is M22520/2-08 compliant, so the combination will crimp the supplied connectors.

Once crimped, the contacts should be slotted into the rear of the connector shell. Push the contact in until the retaining tab clicks into place. Tug gently to confirm the contact is locked in place.

5.4.3 Power and Ground Wiring

The peak current consumption of the TY96 on transmit exceeds the current capability of a single pin on the connector. Both power inputs must be wired, and at least two ground returns must be wired. This is particularly important when the VHF radio is mounted on a non-conducting surface, such as a composite structure.

Use 20 AWG wire for the power connection wires.

5.4.4 Stereo Wiring Considerations

The TY96 uses stereo for the headphone connections. It is important to connect the left and right audio signals correctly to ensure the intercom and dual watch audio is correctly routed to the headphones. A typical general aviation headset will have the left channel on the tip and the right channel on the ring of the phones jack.

Sleeve

(audio ground)

Tip

(left audio)

Ring

(right audio)

Intercom Audio

When using the stereo intercom, the audio output will appear more towards the side of the person who is speaking. For example, when the pilot is speaking, the co-pilot will hear this slightly more in there left ear than their right.

If the stereo wiring is incorrect then the audio will be routed to the wrong side of the headphones.

Dual Watch Audio

When using the dual watch function, the TY96 will route audio received on the primary channel to the centre of both headphones. Audio received on the secondary channel will be quieter and routed to the rear-right of the headphones.

5.4.5 Mono Wiring Considerations

The TY96 audio wiring can be connected to suit a mono installation. To do this, you must short the left and right signal wires together at the TY96 end of the loom. This will have the effect of placing all audio in the centre of the connected headphones.

This may be relevant when replacing a previous mono VHF radio where you wish to utilise the existing wiring and mono headset jacks.

5.4.6 Audio Wiring

All wires carrying audio signals should be wired using 22 AWG shielded cable to MIL-C-27500 or

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Page 12 Trig Avionics Limited

TY96/96A and TY97/97A VHF Radio Installation Manual

01238-00

22 June 2017

Issue AE equivalent. Mono audio signals should use 2 core shielded cable and stereo signals should use 3 core shielded cable. One core wire within each shielded cable should be connected to ground; the cable shield should not be used to carry the audio ground signals.

The cable shield should be connected to ground at the TY96 end only. Do not connect the shield at both ends of the cable to avoid a ground loop which can increase interference effects.

When terminating shielded cable it is recommended to cut away the cable insulation to expose the cable shield. At the end of the cable, strip the insulation and shield back at least 90mm. Trim the audio signal wires back to 30mm, keeping the signal ground wire at least 90mm in length.

15mm 25mm 30mm

90mm

60mm

Strip the insulation to expose the cable shield

Signal ground wire

Audio signal wires

The audio signal wires can be terminated with D connector socket contacts that conform to MIL part number M39029/63-368.

Using a solder sleeve, attach some flat copper braid to the exposed shield and terminate with a crimp ring. Repeat for all shielded cable and connect the crimp ring terminals to the ground points on the mounting tray back plate.

Solder

Sleeve

Secure shield connection to the mounting tray back plate

Connect the cable shields to the mounting tray back plate along with the signal ground connections.

Secure the ring crimps to the back plate ground lugs using M2.5 screws and spring washers.

Trig Avionics Limited

Ground lugs

(x6)

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