Index by Instrument
“GR Inst List” My Documents/GR Archives/GR Inst List
8/09/95,
Added 1260
HPH
03/15/03
GR Instruments and Parts
Dates are of GR Experimenter or GR Today articles
Dates in () are other articles on item & later models
Letters in () refer to catalogs, letters with - are versions (-B).
Names are signed Authors, names of others who worked on item are in ().
In Bold: In Museum Collection
Underlined: on display in Westford Museum on May 02
By Type Number:
25-A Broadcast Frequency Monitor
Jan 1940
J.K.Clapp
50 Variac
July 1939
S.A.Buckingham
60-AM,-AU Variac
Nov 1941
S.Smiley
70 Variac
May 1938
71 Variac

May 1951
H.M.Wilson (gift of C Wenzelberger)
80 Variac
May 1938
90-B Variac
Sep/Oct 1940
100 Variac

May 1938
100Q
101 Condenser 1915
See June 1930
101-L 101-M
102 Decade Resistor (A,C)
102-E&G 102-C
105 Wavemeter (A) 1916
See June 1930
106-C 106-K?
106 Standard Inductor L,G,K,M,N A)
107 Aryton-Perry Variable Inductor (A) Jan 1935
Unsigned
June 1932
108 Oil Condenser (A) 1916
-D .006, -F .0015
109-A 3-wire Receptical
July 1957
110 Spark Indicator (A)
110-M Vacuum Tube used in
111 10 Step Inductor (A)
also 12 Step Inductor (C)
115 Thermo-Meter (for 105) (A) L.W.Austin Jour NBS No7 Vol.2
Jan 1937
119 R-F Choke
120-A,-B,-C Standard Condersers (A)
air, fixed
122 Audibility Meter (A)
123 Key
have photo
124 Condenser
1916 (A)
See June 1930
125 Phantom-Antenna Resistor (A,G)
127 Hot Wire Ammeters, 3” (C,F)
Bull 901 Jan 1920
128 Hot Wire Ammeters, 5”
129 Galvanometer
(B)
130 Slide-Wire Bridge 1918
133 Standard Resistor
(A,G)
134 Thermo Couples (C)
137 Dials & Knobs
Bull 916 Oct 1923
138 A-Z Binding Posts,Plugs
Bull 916 Oct 1923
139A Multiple Leaf Switch
Bull 916 Oct 1923
140 Relay Key
143-D Rectifier Tube (H)
145 Direct Reading Wavemeter (C)
149 Radio Transmitter have photo
151 Flame Proof Key (C) 1915
154 Voltage Divider
(J)
156 Socket (E)
Bull 916 Oct 1920
158 Auxiliary Radio Transmitter
have photo
160 Decade Bridge
1918 (B)
Designed by Rawson?
161 Antenna Reel
164 Audibility Mixer 1916
Bull 201 1920
166 Amp & Tele Transformers
(C)
Bull 901 Jan 1920, Bull 932
168 Switch have photo
169 Vernier Condenser (C)
170 Hot Wire Galvanometer (C)
171 Single Leaf Switch
Bull 916 Oct 1920
174 Direct Reading Wave Meter (C,F)
176 High Frequency Buzzer
Bulletin 916 1923
177 Inductor Form
Oct 1933
178 High-Frequency Buzzer (C)
Bull 916 Oct 1920
182 Variable Air Condenser (C)
189 Pointer Galvanometer (C)
189L
1
191 Universal Wave Meter (C)
193 Decade Bridge (B-F)
1919
193-P1 Wagner Ground
(F2)
See Sept 1931
R.F.Field
199 Galvanometer
200 Variac
 200-CM
`
June/July 1933
*200CU, 200B
202 Switch and Knob (E)
Bull 916 Oct 1920
203 Audio Oscillator (fork) have photo (from B. Sargent)
206 1 Step Amplifier
Bull 902 May 1920
(F,G)
Bull 903, Aug 1920
210 Ratio-Arm Box
211 Vacuum Tube Detector
Bull 902, May 1920
213 Audio Oscillator (E,F,G)
Apr 1930
C.E.Worthan -2 1000c, -C 400c
214 Rheostats
Bull 901, Jan 1920
215 2 Step Amplifier
Bull 902, May 1920
216 Capacity Bridge (E,F,G) Bull 404, Jan 1921
see Jan 1930 RFF
219 Decade Condensers (E,F)
(11/42)
219-M
222 Variable Condensor, (F) 1916-1936
(10/35 R.F.Field)
224 Precision Wavemeter (G)
Sept 1929
226 Four Step Inductor
Bull 302, Aug 1920, Bull 916, Oct 1920
229 Galvanometer Shunt (E,G) Bull 903, Aug 1920
231-A Ampifying Transformer
Bull 916 Oct 1920
(231-M Modulating Trans)
236 Paper Condenser
(in radio)
239 Special Geared Condenser (E)
(Variable Air)
240 Capacity Meter (E)
Bull #409 Aug 1924
Morley has one (a bridge)
241 Microphone Hummer (F)
246 Variable Air Condenser (E,G)
Bltn 108
Nov 1923
247 Variable Air Condenser (E,F)
Bull 916 Oct 1923
see July 1931
247-W Wavemeter and Filter
Bull 931 1929
248 Line-Amplifier Transformer (E)
Aug 1927
H.W.Lamson
249 Attenuation Box (F)
260 Porcelain Insulator (E,G)
Bulletin 916 Oct 1933
Feb 1933
268 Variocoupler (E,G)
269 Variometer (E,G)
271 Medium Frequency Transformer
Radio Apparatus catalog, Bltn 918 May 1924
274 Jacks and Plugs (E)
275 Piezo-Electric Oscillator (E,F) see Nov 1930
J.K.Clapp Bltn 718 1924
276 Quartz Plate
Feb 1930 earlier?
277 Inductance and Coupling Coils (E)
280 Insulator (E)
Bulletin 916 1923
282 Socket
Bull 916 Oct 1920
283 Tube Protecting Resistance Unit
Radio Apparatus Cat
284 Line-Amplifier Transformers
285 Audio Transformers
Oct 1927
287 Direct-Reading Ohmmeter (E)
289 Fader Recorder
see June 1930
290 Piezo-Electric Oscillator (F2)
292 Audio Frequency Transformers
Jan 1932
293 Universal Bridge (F3,G)
Jan 1932
R.F.Field 293-P1
298 Meter Mountings (G)
299 Socket (E)
Bull 916 Oct 1920
(in radio)
300 Amplifier Unit
Bull 916, Oct 1920
301 Rheostat & Potentiometer (E,G) Bull 916 Oct 1920
301-S104 Variable Delay Line
Oct 1961
F.D.Lewis
302 Geared Dial (E)
303 Geared Dial (E)
305 Radio Filter
Bull 710 Oct 1923
306 Crystal Set
(Tom Vales has picture)
309 Socket Cushion (E)
see July 1931
310 Dials (G)
314 Rheostats & Potentiometers (G)
317 Dials (F,G)
318 Dial Plate (F2)
Apr/May 1933
320 180 K.C. Test Oscillator
321 Artificial-Cable Boxes (E)
329 Variable Attenuation Network (F)
Sept 1927
H.W.Lamson
330 Filter Section (E,F,G)
331 Tuned Transformer
332 Station Frequency Meter D3
Bltn 7100 July 1927
2
333 Rheostat & Potentiometer
Feb 1933
334, 335 Variable Air Condensers (E,F) May 1929
337 Switch (E,F,G)
338 String Oscillograph & Vibration Galvanometer (E,G) Bltn 717 1926 see Apr 1931
339 Switch (F)
340 Rheostat (E,F) (switched, in box)
345 Audio-Frequency Transformer
see June 1930
346 Adapter (E) (tube socket adapter)
348 Antenna Measuring Equipment
1929
349 Socket (E,G)
355 Transformer Test Set (E)
see June 1930
356 Quartz-Plate Holder
Bull 932
1939
358 Wave Meter (E,F,G)
359 Variable-Ratio Transformer (E,F,G)
360 175 & 180 KC Test Oscillators
June 1929, Sept 1929 C.T.Burke
361-B Vacuum-Tube Bridge (E,F)
see Feb 1928
365 Plate-Supply Transformer (E)
366 Filter Choke (E)
367 Output Transformer (E)
Oct 1927
368 Variable Air Condenser (E,G)
369 Impedance (inductor) (E)
371 Rheostat & Potentiometer (E,F,G)
373 Double Impedance Coupler (E)
Oct 1927
374 Condenser (variable, air) (E)
375 Piezo-Electric Oscillator (E,F)
(6/35)
376 Quartz Plates (F,G)
Bull 916 Oct 1920
(2/30 C.E.Worthen)
377-B Low-Frequency Oscillator (E,G) Oct 1929
L.B.Arguimbau (6/35)
379 Radio-Frequency Chokes (E,F,G)
380 Decade Condenser Units (F) (for 219 Boxes)
383 Portable Capacity Bridge (E,F,G)
Feb 1927
384 Portable R-F Oscillator & Inductors (E,F,G) Apr 1929
387-A Speaker Filter (E,F)
Oct 1927
388 Vacuum Tube Reactivator
Feb 1928
C.T.Burke
389-B Pierce Magnetostriction Oscillator (F)
400 Plate Supply & Power Amplifier
403 Standard-Signal Generator (E,F) Mar 1930
C.T.Burke (1928 see 6/35) Lewis Hull
404 Service Test Oscillator (F2)
June 1929
405 Power Supply Unit
407 Synchronous Shutter (F2)
Apr 1931 H.W.Lamson (P1 Shutter Wheel)
408 Oscillograph Camera (F2)
Apr 1931
H.W.Lamson
409 Camera Shelf
(F2)
410 Rheostats
(E)
July 1927
411 Synchronous Motor
(E)
May 1927
J.K.Clapp
413 Beat-Frequency Oscillator (E,F) Apr 1927
415 Laboratory Amplifier
Mar 1927
418 Dummy Antenna (F3,G)
See Aug 1930
(-G 11/37)
419 Rectifier-Type Wavemeter(F3)
Nov 1931
E.Karplus
421 R.F. Reactance Meter
Apr 1934
H.H.Scott
423 Vacuum Tube Oscillator (F)
426-A Thermionic Voltmeter (E,G)
Sept 1928
427-F Alternating-Current Voltmeter (F)
429 Attenuation Box (F,G)
(7/35)
433 Rheostat
Jan 1942
434-B Frequency Meter (F3,G)
Nov 1931
-B (No -A?)R.F.Field
(Wien Br)
437 Adjustable Center Tap Resistor (E,F) Dec 1927
438 Socket (E)
July 1927
439 Center Tap Resistor (E,F)
July 1927
440-A Low-Voltage Transformer (E)
July 1927
441 Push-Pull Amplifier (E)
Oct 1927
C.T.Burke
443 Mutual-Conductance Meter
Sept 1928
(bridge)
444 Socket (H)
445 Plate Supply & Grid-Bias Supply (E) Sept 27
446 Voltage Divider (E)
Dec 1927
449 Adjustable Attenuator
Nov 1937
452 Voltage Divider (F)
Nov 1937
452-C
456 Duplex Siphon Recorder
Feb 1932
H.W.Lamson
457 Modulation Meter (F2,G)
see Mar 1930
458 5-Meter Wavemeter (E)
3
459-A Manual Recorder
Dec 1931
H.S.Wilkins
467 Synchronous Driving Fork
Nov 1927
H.W.Lamson
471 Rheostats & Potentiometers (G)
473 Synchronometer
Nov 1927
H.W.Lamson
475 Frequency Monitor (J)
Apr 1935
C.E.Worthen
476 Quartz Bar (J)
478 Cathode-Ray Oscllograph Tube (F3,G)
480 Relay Rack (F,G)
Sept 1932
481 Polar Relay
Feb 1929
C.R.Burke
481-P412 Rack adapter Set
July 1965
R.W.Harley
483 Output Meter (F3,G)
(-F 6/36)
484 Modulated Oscllator & Inductors Oct 1932
486 Output Meter (F)
July/Aug 1929
J.D.Crawford
487 Megohm Meter (J)
Sep/Oct1936
F. Ireland
488 Alternating-Current Meters (F,G)
489-B Pierce Twin Magnetostriction Oscillator (F)
492 Oxide Rectifier (F2,G)
493 Vacuum Thermocouples (F3,G)
Mar 1939
D.B.Sinclair
496 Cathode Ray Oscillograph & Power Supply Unit (F3,G)
497 Tube Mounting (F3,G)
500 Resistors (F3,G)
502 Dials (F2,G)
503 Dials (F2,G)
505 Condensers (J)
Jan 1933
A.E.Thiessen
May 1932 H.H.Scott
506-A Bedell Sweep Circuit (F)
507-A Non-Polar Relay
Nov 1929
508 Oscillator (F3,J)
(1/36, R.F.Field)
509 Mica Condensers
Apr 1935
509-U 0.2uF
510 Decade Resistor Unit (F3,G)
511 Synchronous Clocks (F,G)
see June 1930,
511-C Synchro-Clock
Oct 1930
H.S.Wilkins
513 Beat-Frequency Oscillator (F,G) Apr 1931
C.T.Burke
514 Amplifier (F3,G)
Oct 1931
C.T.Burke
516 Radio-Fequency Bridge (G)
July 1932
C.T.Burke
(-C 12/33)
519 Dial Lens
Jan 1933
520 Dial Lock
Jan 1933
521-A Edgerton Stroboscope
Ayug/Sept 1933
522 Dial Plate
523 Dial Plate
525 Resistor (power)
Apr/May 1933
526 Rheostats
527 Rectified Filter (E,F,G)
528 Cathode-Ray Tube
June/July 1933
J.D.Crawford (see Nov ’37)
529 Attenuation Box (F,G)
530 Band-Pass Filter (F3,G)
531 Power Supply (G)
Apr/May 1933
Museum has manual
532 Station Frequency Meter (E)
Apr 1931
C.T.Burke
533 Rheostat & Potentiometer (G)
Feb 1933
(250w)
534 Band-Pass Filter (G)
535 Frequency Meter-Monitor
Jan 1933 Unsigned
536 Distortion-Factor Meter (F3,G) Nov 1931
W.N.Tuttle
537 Knobs (G)
539 Variable Air Condensor (F2)
(H. Hyman has one, unboxed)
540 Filament Transformer (F)
541 Push-Pull Amplifier Transformers (E,F)
544 Megohm Meter *(Megohm Br)
June/July 1933
R.F.Field (-B 7/37)
545 Power Transformer
May 1929
546 Microvolter (G)
June/July 1933 J.W.Horton (-B 4/41 M.A.Gilman, -C ‘48)
547 Temperature Control Box (G)
Nov 1929
unsigned
548 Edgerton Stroboscope (G)
Dec 1932 H.R.Lamson (Edgerton & Germeshausen)
549 Synchronous Motor Contactor (G)
-B
550 Mercury Lamp Renewal (G)
552 Volume Control (F2)
June 1931
A.E.Thiessen
553 Volume Control (F2)
June 1931
A.E.Thiessen
554 Voltage Divider (F)
Feb 1929
556 Amateur-Band Condenser (F2)
(variable, air)
557 Amateur-Band Condenser (F)
558 Wavemeter (E)
July 1928
4
559 Noise Meter (G)
Mar 1933
H.H.Scott (-B 11/35)
560 Crystal Holder (H)
Sept 1932
561 Vacuum Tube Bridge (G)
May 1932
W.N.Tuttle (-D 11/41)
565 transformer (G)
566 Wavemeter (G)
Oct 1931
E.Karplus
568 Variable Air Condenser
Oct/Nov 1938
572 Microphone Hummer (G)
573-A Resistance-Impedance Coupler
Bull 932 1930
574 Wavemeter (G)
Oct 1931
unsigned
575 Piezo-Electric Oscillator (G)
see Nov 1930 (types 275 & 547
576 Quartz Bar (F2)
1930
577 Inductor (G)
578-A Bridge Transformer
April 1934,
R.F.Field (10/35, 1/38)
579 Tube Mounting (G)
June/July 1933
J.D.Crawford
580 Power Supply Unit (G)
June/July 1933
581 Frequency Deviation Meter (G) Cat F Supp 1931
(1/32)
May 1932
J.D.Crawford
583 Power Output Meter (G)
585 Audio-Frequency Transformer (E,F2,G) July 1928
586 Output Level Indicator (F,G)
Apr 1930
(6/35)
587 Speaker Filter (E)
Apr 1929
588 Direct-Current Meter (G)
see Oct 1930
590 Piezo-Electriuc Oscillator (F,G)
591 Temperature Control Unit (F)
592 Multivibrators (F,G)
see Oct 1932
593 Timing Unit (F,G)
594 Heat-Control Unit (G)
595 Power Supply Unit (F,G)
597-A Tube Mounting
(for CRT)
June/July 1933
598 Fader
(F)
July/Aug 1929
H.W.Lamson
600 Standard-Signal Genertor (F3,G) Aug 1931 L.B.Arguimbau & J.D.Crawford
601 Standard-Signal Generator (F3)
see Apr 1932
A.E.Theissen
602 Decade Resistance Boxes
Feb 1932
603 Standard-Signal Generator (G)
May 1932
C.T.Burke
604 Test-Signal Generator (G)
Feb 1933
604-P20 coil
605 Standard-Signal Generator
June 1936
A.E.Theissen
607-S1 Std Gsignal Generator
museum has manual
608-A Oscillator (1st R-C Osc)
Apr 1939
H.H.Scott
610 Ratio-Arm Box (G)
611 Synchro Clock (J)
1922?
see Oct 1930
H.S. Wilkins
612 Control Panel (G)
May 1932
C.T.Burke (-B 6/34)
613 Beat-Frequency Oscillator (G)
614 Selective Amplifier (J)
615 Hetrodyne Frequency Meter (G)
616 Hetrodyne Frequency Meter (G)
see Oct 1932
617 Interpolation Oscillator (G)
618 Harmonic Oscillator (G)
619 Hetrodyne Detector (G)
Oct 1932
620 Hetrodyne Frequency Meter (M)
Feb 1940
J.K.Clapp
621 Edgerton (Power) Stroboscope (J)
Jan 1935
(1/36 C.T.Burke)
624 Precision Wavemeter (G)
624P Inductors
625 Bridge (G)
Apr/May 1933
R.F.Field
626 Vacuum-Tube Voltmeter (F3,G)
Nov. 1931 Lamson
627 Jack-Top Insulator (G)
628 Insulator (G)
629 Lead-In Assembly (G)
630 Stand-off Insulator (G)
631 Strobotac
 (J)
Aug 1935 H.H.Scott (Wilkins, Edgerton & Germeshausen)
631-P1 Strobotron
632 Capacitance Br For Electrolytic Condensers June/July 1933 R.F.Field
635 Electron Oscillograph (G)
June/July 1933
J.D.Crawford
636 Wave Analyzer
June/July 1933
L.B.Arguimbau
637 Fluted Knobs (G)
Aug/Sept 1933
638 Sockets (F2)
639 Variable Air Condenser (G)
641 Transformer
Dec 1939
L.E.Packard
642 Volume Control (G)
May 1932
A.E.Theissen
645 Laboratory Amplifier
Apr 1930
A.E.Theissen
5
646 Logarithmic Resistor (J)
647 Socket (G)
648 Strobolux (M)
May 1939
C.E.Worthen
649 Sockets (F2)
650-A Impedance Bridge
Apr/May 1933
R.F.Field
650-P1 Oscillator-Amplifier
Apr 1946
H.W.Lamson
651 Camera Assembly
Nov//DEc 1934
H.W.Lamson
652 Volume Control
1931
653 Volume Control
(G)
Feb 1933
654 Voltage Divider
May 1932
655-A Bedell Sweep Circuit (H)
May 1934
H.H.Scott
656/657/658 Sockets (F2,G)
660 Universal Rack (J)
Oct 1933
661 Unit Panel Equipment (G)
Oct 1933
663 Resistor (HF)
Jan 1939
D.B.Sinclair
664 Thermocouple
May 1928
L.B.Arguimbau
666 Variable-Ratio Transformer (G)
667 Inductance Bridge
Mar 1934
R.F.Field (6/35)
668 Compensated Decade Resistor Units, Mar 1934
R.F.Field
669-A,R Compensated Slide Wires
Mar 1934
670-F Compensated Decade Resistor
Mar 1934
R.F.Field
671-A Schering Bridge
(60 Hz)
June 1938
H.W.Lamson
672 Power Supply
Sep/Oct 1934
673 Power Supply
674 Plugs & Jacks (G)
675 Piezo-Electric Oscillator (J)
676 Quartz & Mounting (J)
677 Coil Forms
Jan 1933
(5/36)
678 Jack & Plug Base (J)
679-A, B Inductor
Mar 1934 M. Eastham & J.M.Clayton
680 Jack Base (G)
681 Frequency Deviation Meter (J)
Jan 1940
J.K.Clapp
682 Frequency Deviation Meter (J)
683-A Oil Cell
Sep/Oct 1934
R.F.Field (4/35)
684-A Modulated Oscillator
Nov 1937
686-A Power-Level Indicator
Oct 1937
A.E.Theissen
687 Electron Oscilloscope & Bedell Sweep Ckt June 1934 (HHS & EK)
687_BM Cabinet Model, 687-BR Rack Model see 11/35 p.8
690-B Piezo-Electric Oscillator (H)
691 Temperature Control Unit (H)
692 Multivibrator (J)
693 Snychro Clock (H)
K, 1939
694 Crystal Osc. (H)
695 Power Supply (H)
696 Ac Power Supply
698 Duplex Multivibrator
(last 1946)
699 Comparison Oscilloscope
Dec 1931
J.K.Clapp
700 Beat-Frequency Oscillator (M)
Jan 1939
D.B.Sinclair
701 Direct Dial Drives
Aug 1940
702/703 Friction Dial Drives
Aug/Sep 1933
704 Precision Dial (G)
705 Friction Dial Drive (J)
Feb 1935
706 Precision Dial(G)
Jan 1933
707 Cathode-Ray Null Indicator
Apr 1939
H.W.Lamson
710 Plain Dial (G)
Direct Dial Drive (J)
712 Direct Dial Drive (J)
Feb 1935
713 Beat-Frequency Oscillator (J)
Jun 1935, (7/35) 1935 L.B Arguimbau
714 Amplifier
Sep 1935
L.B.Arguimbau
715 Direct-Current Amplifier (M)
Feb 1939
J.K.Clapp
716-A Capacitance Bridge (J)
Dec 1939
R.F.Field (-B 4/42)
716-B
“
Apr 1942
R.F.Field
716-C Capacitance Br
Apr 1947
R.F.Field & I.G.Easton
716-P2 Guard Circuit
Mar 1940
R.F.Field
716-P4 Guard Circuit
Aug 1952
I.G.Easton
716-CS1 Capacitance Br. 1Mc
Feb 1952
I.G.Easton
717 Plain Dial (G)
720 Hetrodyne Frequency Meter (L,M) July/
Aug 1945
E. Karplus
6
721 Coil Comparator
722 Precision Capacitor (J)
722-D
722-N H-F version
Jul 1937
Jan 1936
Feb 1937
Oc
W.N.Tuttle
Field?
C.E.Worthen
t/Nov 1938 D.B.Sinclair
723 Vacuum-Tube Fork (M)
Oct 1941
W.N.Tuttle
724 Precision Wavemeter (J)
Mar 1936
A.G.Bosquet
725 Color Comparator (J)
Aug 1935
C.T.Burke
726 Vacuum-Tube Voltmeter (J)
5/37
W.N.Tuttle (7/38 D.B.Sinclair)
727 Vacuum-Tube Voltmeter
May 1942
W.N.Tuttle
728 Vacuum Tube Voltmater (battery) Dec 1944
A.G.Bosquet
729 Megohmmeter (M) Battery Operated Jul 1940
W.N.Tuttle
730 Transmission Measuring Set (J) Jan 1935
L.B.Arguimbau (6/35)
731 Modulation Monitor (J)
Jan 1935
"
732 Disatortion & Noise Meter (J)
Feb 1935
L.B.Arguimbau
733 Oscillator (J)
Feb 1935
"
736 Wave Analyzer (M)
Dec 1938
L.B.Arguimbau
738 Insert Terminal (G)
739 Logarithmic Condenser
Aug/Sept 1938
A.G.Bosquet
740 Capacitance Bridge (M)
(-B 6/38 L.E.Packard)
741-G Transformer
Jul 1935
A.E.Theissen
747 Temperature Control Box (G)
755-A Condenser
Aug 1939
755-AS1 Susceptance Variation Circuit Sep/Oct 1940
R.F.Field
756 Variable Air Condenser (G)
757-A Ultra-High-Frequency Oscillator Aug 1941
A. Peterson
757-P1 Power Supply
758 Wavemeter (M)
Aug 1940
E. Karplus
759 Sound-Level Meter (J)
Dec 1937
L.E.Packard
760 Sound Analyzer
Feb 1939
H.H.Scott
761-A Vibration Meter
Jun 1941
H.H.Scott
762 Vibration Analyzer (M)
769 Square-Wave Generator
Dec 1939
L.B.Arguimbau
770 Cathode Ray Oscilloscope
see Theissen p. 40
Sinclair
Not marketed
774 Coaxial Terminals
Apr 1941
D.B.Sinclair
775-A Frequency-Limit Monitor
Feb 1938
D.B.Sinclair
776 Patch Cord
777-Q1,Q2,Q4 Adaptor
783 Power Output Meter (M)
Jan 1942
804 Standard-Signal Generator
Nov 1939
(-B 2/41 M.T.Smith)
805 Standard-Signal Generator
Apr 1943
C.C.Cady
813 Oscillator
May 1935
H.W.Lamson
814 Amplifier and 814-P1 filter
Jan 1938
815 Tuning Fork
May 1936
816 Vacuum Tube Prec. Fork
(last 1948)
821 Twin T Impedance-Measuring Network Jan 1941
D.B.Sinclair
829 Decade Attenuator Unit (M)
Dec 1949
H.W.Lamson
830 Filter (J)
830-R
834 Electronic Frequency Meter
Dec1935
J.K.Clapp
838 Test Leads, Clips etc
Jul 1952
H.C.Littlejohn
846,847,848 Variable Air Capacitors
(last 1948)
857 U-H-F-Oscillator
Nov 1944
E.Karplus
869 Pulse Generator (M)
Jan/Feb 1944
H.H.Scott & C.A.Cady
874 Coaxial Elements
Jan 1950
W.R.Thurston (EK)
874-LB Scotted Line
Nov 1950
R.A.Soderman & W.M.Hague
874-LBA Sweep Drive
Apr 1955
R.A.Soderman
874-MR Mixer
May 1950
E. Karplus
880-DCA, G6,G10 Attenuators
(last 1977)
900 Coaxial Equipment
Nov 1963
J. Zorzy
901/902/903/904/905/906 Dials (M)
907/908 Gear Drives (M)
May 1955
913-A Beat-Frequency Oscillator
Jul 1942
H.H.Scott
916-A Radio-Frequency Bridge (M)
Aug 1942
D.B.Sinclair
916-AL Radio-Frequency Br.
Mar 1949
R.A.Soderman
920 Switch (last 1948)
938 Binding Posts (M)
Jun/Jul 1952
H.C.Littlejohn
940 Decade Inductor Unit
July 1949
H.W.Lamson
7
941 Toroidal Transformer (M)
Sep 1950
H.W.Lamson
942 Output Transformer (O)
Nov 1951
H.W.Lamson
970 Dial
971-977 Potentiometers
Jan 1955
H.M.Wilson
971, 973
980 Decade Capacitor Units
1000-P3,4,5,P6 Voltage Divider, Dummy Antenna, Transformer & Crystal Diode
1001 Standard-Signal Gneerator (N) Sept 1949
A.G.Bosquet
1003 Standard-Signal Generator
Jul/Aug 1967
R.Altenbach
1021 UHF Standard-Signal Generator Mar 1950
E.Karplus & E.E Gross
1022-A F-M Standard-Signal Generator Nov 1949
D.B.Sinclair
1023 Amplitude Modulator (M)
Nov 1949
D.B.Sinclair
1025-A Std Sweep Freq Generator
Jan 1963
W.F.Byers
1026 Standard-Signal Generator
Mar 1967
G.P.McCouch
1061 Frequency Synthesizer
1062 Frequency Synthesizer
GR Today Aut 1973
1065 Frequency Synthesizer
1100 Frequencty Standard(M)
1101-A,B Piezo Electric Oacillator
1102-A Multivibrator & Power Supply
1103 Synchronometer
1105 Freq Measuring Equipment (M)
Jun 1958
F.D.Lewis
1106 Frequency Transfer Unit (M)
1107 Interpolation Oscillator (M)
1108 Coupling Panel (M)
1109 Comparison Oscilloscope (M)
1110 Interpolating Frequency Std (M)
1112 Standard Frequency Multiplier (P) Jul 1958
F.D.Lewis
1113-A Standard Frequency Oscillator
1114 Frequency Divider
1115-B Std-Frequency Oscillator
Jun 1964
H.P.Stratameyer
1116 Emergency Power Supply (P)
-B 4-5/63
1120 Frequency Standard
Apr 1961
Frank, Lewis & Stratameyer
1121-A Frequency & Time Standard
Feb/Mar 1965
1123-A Digital Synchrometer
Aug 1964
Feb/Mar 1965 D.O.Fisher
1124 Receiver
Mar 1968
D.O.Fisher
1125 Parallel Storage UniT
Mar 1968
D.O.Fisher
1130 Digital Time & Freq Meter
May 1961
R.W.Frank & H.T.McAleer
1131-P1 to P5 Counting Units
1132-A Data Printer
1133 Frequency Converter
Dec 1962
H.T.McAleer
1134 Analog-to-Digital Converter
Oct 1961
H.P.Stratameyer
1136 Analog-to-Digital Converter
Dec 1963
H.P.Stratameyer
1137 Printer
1140 Wavemeter (M)
1141 Audio-Frequency Meter
Feb 1948
M. Gilman
Wien Br like 434
1142 Frequency Meter & Discriminator Jan/Feb 1961
C.G.Chitorous (MCH)
1143-A Frequency Measuring Assembly Sep 1965
1144-A 100Mc Digital Frequency Meter Sep 1965
1150 Digital Frequency Meter
Apr 1962
J.K.Skilling & R.W.Frank
1151 Digital Time & Freq Meter
Jun 1963
R.W.Frank
1153-A Digital Frequency Meter
Sep 1965
S.Bentzen & D.S.Nixon
1156-A Decade Scaller (10:1)
Sept 1965
D.S.Nixon
1157-B Scaler (100:1)
Jul/Aug 1968
(Skilling & Sargent)
1158-9600 Tektronix Probe
1159 Recipromatic Counter
Jun/Jul 1968 N.L.Westlake & S. Bentzen
1160-RDI-1 Digit Insertion Unit
May 1965
G.H.Lohrer
1161-A Coherent Decade Freq Synthesizer Sept 1965
A. Noyes
1162-A Coherent Decade Freq Synthesizer Sept 1965
A. Noyes
1163-A Coherent Decade Freq Synthesizer Nov/Dec 1965 A. Noyes
1164-A Coherent Decade Freq Synthesizer Sep 1966
W.F.Byers
1165-A Coherent Decade Freq Synthesizer Nov/Dec 1965
1168-A Coherent Decade Freq Synthesizer Sep 1966
1169 Resolution Kit
1170 F-M Frequency Monitor (O)
1176 Frequency Meter (O)
1181-A A-M Frequency Deviation Meter
1181-AT Color Subcarrier Monitor (O) Apr 1954
W.R.Saylor (-B 4/68)
1183 T-A Television Trasmitter Monitor Apr 1958
8
1184 TV Transmitter Monitor (O)
Sept 1956
C.A.Cady
1190 Quartz Bar
1191 Counter
Jan/Feb 1969 (-Z 11/68 H.T.McAleer)
1192 Counter
Jul/Aug 1969
S.Bentzen
1201 Ub=nit Regulated Power Supply Aug/Sep 1958
1202 Unit Vibrator Supply (O)
Feb 1955
A.G.Bosquet
1203 Unit Power Supply
Jul 1951
(-B 7/57)
1204 Unit Variable Power Supply
Jul 1951
1205-A Unitb Power Supply
Nov 1948
Unsigned
1205-B Adjustable Regulated Power Supply Mar 1959
(M.C.Holtje)
1206-A Unit Amplifier
Nov 1948
unsigned
1206-B Unit Amplifier
Nov 1953
H.P.Hall (DBS, APGP)
1207-A Unit Oscillator
Nov 1948
Unsigned
LC Osc
1208 Unit Oscillator
May 1950
E.Karplus (-B 4/55,-C 6/65)
1209 Unit Oscillator
May 1950
E.Karplus
"
"
1210-A Unit Oscillator
1210-B Unit R-C Oscillator
May 1955
Bosquet, Peterson & Sinclair
1210-C Unit R-C Oscillator
Apr 1958
1211 Unit Oscillator
Sep 1053
A.G/Bosquet (-C 6/65)
1212 Unit Null Detector
Feb 1953
R.B.Richmond
1212-P2 One-Megacycle Filter
Jan 1956
H.P.Hall
1213-A Unit Crystal Oscillator
Feb 1952
R.B.Richmond (-C 6/56 RWF & FDL)
1213-D Unit Time/Freq Calibrator
Oct 1959
R.W.Frank & H.P.Stratameyer
1214 Unit Oscillator
Jul 1951
(-E 2/59)
1215 Unit Oscillator
Jan 1953
A.G.Bosquet (-B 4/55, -C 6/65)
1216 Unit IF Amplifier
May 1954
R.A.Soderman
1217-A Unit Pulser
Mar 1954
R.W.Frank (-B 2/62, -C 12/64)
1218 Unit Oscillator
Feb 1955
E.Karplus (-B 7/65 R.W.Hartley)
1219 Unit Pulse Amplifier
Jul 1955
R.W.Frank
1220 Unit Klystron Oscillator
Mar 1957
B. O'Brien & R.A.Soderman
1230 D-C Amplifier & Electrometer
Mar 1956
A.G.Bosquet
1231-B Amplifier and Null Detector Feb 1948
W.R.Thurston
1232 Tuned Amplifier and Null Detector July 1961
A.E.Sanderson
1232-P1 Preamp
Feb 1967
H.P. Hall
1233 Power Amplifier
Jan 1951
W.F.Byers
1234 Standing-Wave Meter
Feb 1958
M. Khazam
1235-DNT Hetrodyne Detector
1236-A I-F Amplifier
Jul/Aug 1967
M. Khazam
1237 UHF/VHF Preamplifier
1238 Detector
(D.Abenaim)
1240-A Bridge Oscillator/Detector
Jun 1964
1241 Hetrodyne Detectors
1260-A Variac Rectifier
Mar 1946
E.E.Gross
1261-A Power Supply, (O)
Mar 1946
E.E.Gross
1262 Power Supply (O)
Mar 1952
E.E.Gross (see 1551-A)
1263-A Amplitude-Regulating Power Supply
Apr 1955
W.F.Byers (-B 7/61)
1264-A Modulating Power Supply
Mar 1961
G.P.McCouch
1265-A Adjustable DC Power Supply
May 1962
H.P.Hall
1266=A AC Power Source
May 1962
G. Smiley
1267 Unit Power Supply
Aug 1963
M.C.Holtje
1268 Automatic Battery Charger
Apr/May 1963
1269 Unit Regulated Power Supply
Aug 1963
M.C.Holtje
1300 Beat-Frequency Oscillator
1301-A Low-Distortion Oscillator
Jun 1949
F.D.Lewis
1302 Oscillator
Nov 1947
C.C. Cady
Wien Br.
1303 Two-Signal Audio Oscillator
Aug 1950
A. Peterson
1304 Beat-Frequency Oscillator
Jan 1952
(-B 6/54 CAW)
1305 Low-Frequency Oscillator
Aug/Sep 1959
G. Smiley
1307 Transistor Oscillator
Aug 1954
A. Peterson
1308 Audio Oscilator & Power Amplifier Aug 1966
R.G.Fulks
1309 Low-Distortion Oscillator
Mar 1944
R.E.Owen
1310-A Oscillator
Aug 1965
R.E.Owen
1311-A Audio Oscillator
Aug/Sep 1962
R.G.Fulks
1312 Decade Oscillator
Jan 1968
R.E.Owen
1313-A Oscillator
Feb 1967
R.E.Owen
1316 Oscillator (Cat 78)
1330 Bridge Oscillator
Dec 1950
A.G.Bosquet
1340 Pulser
Nov/Dec 1968
(RWF)
9
1346 Audio-Frequency Microvolter
Aug/Sep 1968
R.E.Owen
1350-A,AQ1 Generator Recorder Assembly
1360-A Microwave Oscillator
Jan/Feb 1962
Per Bergstad
1361-A UHF Oscillator
Mar 1961
G.P.McCouch
1362 UHF Oscillator
Jun/Jul 1968
G.P.McCouch
1363 VHF Oscillator
Jun/Jul 1968
G.P.McCouch
1381 Random-Noise Generator
Jan 1968
J.J.Faran Jr.
1382 Random-Noise Generator
Jan 1968
J.J.Faran Jr.
1383 Random-Noise Generator
(J.J.Faran Jr.)
1390-A Random-Noise Generator
Dec 1951
A.P.G. Peterson
1391 Pulse, Sweep & Time Generator May 1956
R.W.Frank (-B2/59)
1392 Time-Delay Gererator
Dec 1958
R.W.Frank
1394-A High-Rate Pulse Generator
Jul 1966
J.K.Skilling
1395 Modular Pulse Generator
May 1965
G.R.Partridge
1396-A Tone-Burst Geberator
Nov/Dec 1968
J.K.Skilling
1397-A Pulse Amplifier
1398-A, P1 Pulse Generator & DC compensator
1399 Digital Divider, Period & Delay Generator Jan/Feb 1969 R.W.Frank
1401 Capacitor
1403 Standard Air Capacitor
Aug/Sept 1959
I.G.Easton
1404 Standard Capacitor
Aug 1963
J.F.Hersh (-C 8/66/)
1405 Coaxial Capacitance Standards May 1968
R.Orr & J.Zorzy
1406 Coaxial Capacitance Standards Sep 1967
R.Orr
1407 Coaxial Capacitance Standards May 1968
R.Orr & J.Zorzy -D
1408 Reference Standard Capacitors Sept 1970
D.Abenaim & J.F.Hersh
1408-B
" oil bath version
in room
1409 Standard Capacitors
Jul 1957
P.K.McElroy
1412-BC Decade Cpacitor
Aug 1960
R.W.Orr
1413 Precision Decade Capacitor
Mar/Jun 1970
unsigned (R.W.Orr)
1417 Four-Terminal Capaitance Standard
H.P.Hall
1419 Decade Capacitor
Jul 1956
(-K 11/57)
1420 Variable Air Capacitor
Jul 1956
H.M.Wilson
1421 Variable Air Capacitors
Nov 1958
1422 Precision Capacitors
Aug 1961
P.K.McElroy
1423-A Precision Decade Capacitor
Jun 1961
I.G.Easton
1424-A Standard Polystyrene Decade Capacitor Jun 1961 P.K.McElroy (10uF)
1425-A Standard Polystyrene Decade Capacitor Jul 1965 P.K.McElroy (100uF)
1426 Four-Terminal Capacitance Standard Jan 1968
H.P.Hall
1427 Variable Air Capacitor (M)
1428 Variable Air Capacitor (M)
1429-A Fuel Gage Tester (MD-2)
Jan 1960
Unsigned (designed by PKM)
1432 Decade Resistors
June 1951
I.G.Easton (-X Sept 1961)
1433 Decade Resistors
Nov/Dec 1968
H.P.Hall
1434 Decade Resistors
Oct 1962
H.P.Hall
1435 Programmable Decade Resistor
Jul/Sep 1970
(Peter Gray IV)?
1436 Lever Switch Decade Resistor
W.J.Bastanier?
1440 Standard Resistors
Oct 1962
W.J.Bastanier
1441
"
"
"
"
1442 Coaxial Resistance Standards
Apr 1969
R.W.Orr
1444-A,-B Reference Resistance Standard Mar/Jun 1969
W.J.Bastanier
1450 Decade Attenuators
Dec 1949
H.W.Lamson
1452 Programmable Attenuator
Nov/Dec 1970 Unsigned (G.H.Lohrer)
1454 Decade Voltage Divider
Aug 1955
I.G.Easton
1455 Decade Voltage Dividers
Apr 1967
H.P.Hall
1481 Standard Inductors
Dec 1950
H.W.Lamson
-B
1482 Standard Inductors
Nov 1952
H.W.Lamson (7/57)
1490 Decade Inductor
Jul 1949
H.W.Lamson
(5/58)
1491 Decade Inductor
Mar/Apr 1969
Unsigned
1493 Precision Decade Transformer
Apr 1967
G.X.Smiley1500 Counting-Rate Meter
Jul/Aug 1947
(-B 9/50 AGB)
1501 Light Meter (M)
Oct 1950
1510-A Digital-to-Graphic Recording Assem. Sept 1965
(1136 & 1521)
1521-A Graphic Level Recorder
Jun 1959
M.C.Holtje & M.J.Fitzmorris
1522 Preamplifier etc
1523 Graphic Level Recorder (Cat 78)
1525-A Data Recorder
Oct 1966
A.P.G.Peterson
1530 Microflash (M)
(5/45)
10
1531 Strobotac
Sept 1960
M.J. Fitzmorris (MCH) -AB
1532 Strobolume (M)
1533 High Speed Motion Picture Camera
1534 Polariscope
Jun 1950
G. Smiley
1535 Contactor
1536 Photoelectric Pickoff
Oct 1962
1537-A Photoelectric Pickoff
Apr 1966
1538-A Strobotac Electronic Stroboscope Apr 1966
M.C.Holtje
1539 Stroboslave
Apr 1966
M.C.Holtje
1540 Strobolume
Sep/Oct 1969
C.E.Miller
1541 Multiflash Geberator
Jul/Sep 1970
(C.E.Miller & W.F.Rogers)
1542 Stroboscope
Oct/Dec 1970
C.E.Miller (-B Sum '72)
1543
"
GR Today Summ 1972
1544
"
"
1545 GR France Strobe
1547 GR France Strobe
1550 Octave-Band Analyzer (M)
1551 Sound-Level Meter
Mar 1952
E.E.Gross (6/57,-B 11/58,-C 7/65)
Dec 1949
E.E.Gross
1552 Sound-Level Calibrator
1553 Vibration Meter
Nov 1961
E.E.Gross
1554 Sound & Vibration Analyzer
Dec 1959
J.J.Faran Jr.
1555 Sound Survey Meter (M)
Apr 1952
A.P.G. Peterson
1556 Impact Noise Analyzer
Feb 1956
A.P.G.Peterson
1557 1557
Vibration Calibrator
1558 Octave-Band Noise Analyzer
Oct 1962
W.R.Kundert (-BP 11/66)
1559 Microphone Reciprocity Calibrator Apr/May 1963
B.A.Bonk
1560 Microphone, Case, Tripod etc (P)
1561 Precision Sound-Level Meter
Apr 1968
C.A.Woodward & E.E.Gross
1562-A Sound-Level Calibrator
May/Jun 1967
B.A.Bonk
1563 Sound Level Meter
1564 Sound & Vibration Analyzer
Sep/Oct 1063
W.R.Kundert
1565 Sound Level Meter
1565-Z Audio Calibration Kit
Apr 1968
1566 Multichannel Amplifier (Cat 78)
1567 Sound-Level Calibrator
1568-A Wave Analyzer
Sep 1966
W.R.Kundert
1569 Automatic Level Regulator
Apr 1968
W.R.Kundert & C.A.Woodward
1570 Automatic Voltage Regulator
Jul 1954
M.C.Holtje
1571-A Line-Voltage Regulator
Jan 1956
C.E.Miller
1581-A Line-Voltage Regulator
Jan 1956
C.E.Miller
1582-A Line-Voltage Regulator
Jan 1956
C.E.Miller
1583 Three-Phase Line Voltage Reg. Oct 1967
1590 Remote Control
Sep 1961
M.C.Holtje & C.A.Tashijan
1591-A Automatic Line-Voltage Reg. Oct 1967
C. Chitouras
1592-A Automatic Line-Voltage Reg. Oct 1967
C. Chitouras
1601 VHF Bridge P
Feb 1950
R.A.Soderman
1602 UHF Admittance Meter MP
May 1950
W.R.Thurston
1603 Z-Y Bridge
Jul 1955
I.G.Easton
1604-A Comparison Bridge
Feb 1954
M.C.Holtje (-B 2/54)
1605 Impedance Comparator P
Apr 1954
M.C.Holtje & H.P.Hall (Easton
1606-A R-F Bridge (RAS) P
Jun 1955
R.A.Soderman (-B 9/67)
1607 Transfer-Function and Immittance Meter Mar 1958 W.R.Thurston & R.A.Soderman
1608 Impedance Bridge
Mar 1962
H.P.Hall
1609 Precision UHF Bridge
Nov-Dec 1967
J.F. Gilmore
1610-A Capacitance Measurement Assembly Dec 1953
(IGE., -AK 2/57
1611-A Capacitance Test Bridge
July 1948
I.G.Easton (-B 2/58)
1612-A R-F Capacitance Meter
Nov 1948
W.F.Byers
1612-AL "The Type 1612-AL Capacitance Meter" Feb 1951 P.K. McElroy
1613-A Capacitance Bridge (P-582)
Feb 1958
H.P.Hall (P.K.McElroy)
1614 Capacitance Bridge
Feb 1946
H.R.Lamson
1615-A Capacitance Bridge
April 1962
J.F.Hersh
1616 Precision Capacitance Bridge Oct/Dec 1970
D. Abenaim & J.F.Hersh
1617-A Capacitance Bridge
Jun 1966
H.P.Hall
1620 Cap. Meas. Ass. (1615,1232,1311) See 1615
1621 Precision Cap. Meas. Ass. (1616,1238,1316)
See 1616
1630 Induct. Meas. Ass. (1633,1265,1308) see 1633
1631 Inductance Bridge
Feb 1946
H.R.Lamson
see 1614
1632A Inductance Bridge
Nov 1959
J.F.Hersh
11
1633 Incremental Inductance Bridge May 1962
H.P.Hall & R.G.Fulks
1633-P1 Range Extension Unit
1640 Slotted Line Recorder
Jan 1965
A.E.Sanderson
1641 Sweep Freq. Reflectometer
Mar/Apr 1969 MacKenzie, Gilmore & Khazam
1644 Megohm Bridge
July 1964
H.P.Hall
1650-A Impedance Bridge
Mar 1959
H.P.Hall
1650-B Universal Impedance Bridge
May 1968
C.D. Havener
1651 Bolometer Bridge
Jul 1950
R.A.Soderman
1652 Resistance Limit Bridge
Jan 1952
W.M.Hague Jr.
1654 Impedance Comparator
May/Jun 1969
R. K. Leong
1655 (Semi-Auto IMP. Br. (CDH) never sold)
1656 Impedance Bridge
Mar/Jun 1970
(H.P.Hall, unsigned)
1657 Digibridge
1976
(HPH, M. Gipe, R.Sullivan,)
1658
"
1977
"
1659 RLC Digibridge
1660 Precision Inductance Meas. Assem. (1632,1311,1232)
1661-A Vacuum Tube Bridge
Feb 1959,
A.G.Bosquet (-B 8/61)
1662 Resistance Comparator
Nov/Dec 1969
R.K.Leong
1666 Resistance Bridge
GR Today Autumn 1972
(HPH)
1670 Magnetic Test Set
Aug 1948
H.W.Lamson
1671 Coaxial Cable Attenuation Meas. Kit Dec 1957
(WRT)
1672 Digital Control Unit
(RGF)
bridge part of 1680
1673 Automatic Capacitance Bridge
(RGF)
bridge part of 1680
1674 Auto. Digital Comparator
June/July 1968 (RKL) (part of 1681)
1680 Automatic Capacitance Bridge Assem. Apr 1965
R.G.Fulks
1681 Auto. Impedance Comparator System
Jun/Jul 1968 R.K. Leong
1682 Auto. Capacitance Bridge (1Mc) Nov/Dec 1969
R.F. Sette
1683 Automatic RLC Bridge
Mar/Jun 1970
T.J.Coughlin
1684 Digital Impedance Meter Cat 74
(TJC)
1685 Digital Impedance Meter
1973
(HPH)
1686 Digital Capacitance Meter
(HPH)
1687 1 MHz Digibridge
(WFB, HPH & others)
1688 Precision LC Digibridge
(RCS, HPH & others)
1689 Precision Digibridge
(RCS, HPH & others)
1690 Dielectric Sample Holder
1691 Capacitance Test Fixture
Oct 1955
I.G.Easton
1692 RLC Digibridge
1693 RLC Digibridge
1700 Variac Speed Control
Apr 1949
W.N.Tuttle (-B 5/51)
1701 Variac Speed Control
Oct 1949
1702 Variac Speed Control
Dec 1953
W.N.Tuttle
1703 Variac Speed Control
"
1704 Variac Speed Control
Dec 1953
1705 Variac Speed Control
"
1710 Precision RF Network Analyzer GR Today Summ 1972
C.E.Gorss
1730 Linear Circuit Tester
GR Today Mar 1974
(R.K.Leong)
1731 Socket Adaptor Sets (for 1730)
1732 Digital Circuit Tester
1735 Dig IC Tester
1740 Linear IC Tester
1742 Digital IC Tester
1744 Digital IC Tester
1750 Sweep Drive
Apr 1955
E.Karplus
1770-A Scanner System
Nov/Dec 1966
H.T.McAleer & R.F.Sette
1772 Switch Assemblies
1781-A Digital Limit Comparator
Nov/Dec 1966
1782 Analog Limit Comparator
May/Jun 1969
R.K.Leong
1783 Digital Limit Comparator
Aug/Sep 1968
1784 Multiple Limit Comparator
1785 Printer
1790 Logic-Circuit Tester
Jan/Feb 1970 (Cvitkovich, Fichtenbaum etc)
1791 Card-Punch Coupler
1792 Logic-Circuit Analyzer
GR Today Spring 1973
1793 Logoic Circuit Tester
1795 Logic Test System
1796 Digital/Analog Test System
1797 Programming Station
1799 Digital/Analog Test System
12
1800 Vacuum-Tube Voltmeter M
Sept 1946
C.A.Woorward (& DBS?)
1802 Crystal Voltmeter M
Oct 1946
A.P.G. Peterson
1803 Vacuum-Tube Voltmeter M
Apr 1950
C.A.Woodward(-B 3/55)
1805
1806 Electronic Voltmeter
Jul 1963
J.J.Faran Jr.
1807 D-C Microvoltmeter/Nanoammeter Aug/Sep 1968
K.G.Balekdjian
1808 AC Millivoltmeter
Nov/Dec 1969
K.G.Balekdjian
1820 Digital Voltmeter
May 1968
K.G.Balekdjian
1822 Digital Voltmeter Calibrator
Mar/Apr 1969
R.P.Anderson
1840 Power output Meter
Feb 1962
G.Smiley
1861-A Megohmmeter
Nov/Dec 1945
W.N.Tuttle
1862-A Megohmmeter
Nov 1951
A.G.Bosquet
1862-B Megohmmeter
Dec 1954
A.G.Bosquet
1862-C Megohmmeter
Jul 1963
H.P.Hall
1863-A Megohmmeter
Mar/Apr 1969
H.P.Hall (W.Blake)
1864-A Megohmmeter
Mar/Apr 1969
H.P.Hall (W.Blake)
1865 Megohmmeter
designed by QuadTech
1900-A Wave Analyzer
Apr 1964
A.P.G.Peterson
1909 1/3 Octave Real-Time Analyzer
a 1972
G. Partridge & R.W. Frank
1910 Recording Wave Analyzer
Apr 1964
A.P.G.Peterson
1911-A Recording Sound & Vibration Ana. Sep 1964
M.W.Basch
1912 Third-OctaveRecording Analyzer (U)
1913 Recording Wave Analyzer
1920
See P-1920 below
1921 Real-Time Analyzer
May/Jun 1969 Kundert, LaPointe & Partridge
1923 Vibration Control System
GR Today Sum 1972
Time Data Div.
1925 Multifilter
Oct 1968
W.R.Kundert
1926 Multichannel RMS Detector
1931 Modulation Meter (M)
-B 4/58
1932-A Distortion Meter
Jun 1949
F.D.Lewis
1933 Precision Sound Level Meter & Analyzer Sys. See GR Today Mar 1974
1934 Noise Monitor
1935 Cassette Data Recorder
1937 Audiometer
GR Today Mar 1974
1938 Sound Shelter
Cat 73
1939 Audiometric Examination RoomR Cat 73
1940 Power Supply
1944 Sound Exposure Meter
GR Today Sum 1972
1945 Community Noise Analyzer
1951 Filter (O)
Feb 1953
1952 Universal Filter
Apr 1968
W.R.Kundert
1954 Noise Dosimeter
1961 Electret Condenser Microphone (1")
1962 Electret Condenser Microphone (1/2")
1963 Electret Condenser Microphone (1/4")
1971 Ceramic Microphone (1")
1972 1/2" Ceramic Microphone & Adaptor
1981 Precision Sound-Level Meter/Sets/System
1982 Precision Sound-Level Meter & Analyzer System
1983 Sound-Lvevl Meter
1984 Sound Level Meter
1985 DC Recorder
1986 Carrying Case
1988 Random Mike etc
1995 Real Time Analyzer
2200 Multi-Station Test System
(Cat 73)
2210-A Analog Circuit System
GR Today, Spring 1973
2220 Bug Hound
(M. Fichtenbaum)
2230 Passive Test System
(W.Kabele, others)
2240 Resistance Anodize Trim System (RATS) GR Today Sum 1972
(M.Holtje)
2250 Functional Laser Trim System
GR Today Mar 1974
2260 Automatic R-F Network Analyzer Sys. GR Today Spr 1973
2270 In-Circuit/Functional Test System
Cat 78
228X
2290-9259 Automatic Component-Test System Cat 73
2295-8158 Bias Supply
May/June 1969
2295-9349 Resistance Anadodize Trimmer
“MimiRATS” Cat 73
2512 Spectrum Analyzer
13
?
2750
2995-0158 Bias Supply
(More New Test Systems)
Listed By Letter:
BC-14A Radio Receiving Set, USA Signal Corp
S.C.R 112 Battalion<->Regiment Set Box 1919
C-21-H Primary Fequency Standard
Jun 1935
CAP-22 Three-Wire Cord
Apr 1962
CGR 44 Portable Signal Gen for USCG
museum has manual
DNT Detector Assemblies
May 1954
R.A.Soderman
DNT-2 "
Mar 1955
R.A.Soderman
DNT-5,-6,-7 "
Jun 1965
FR-36/U Het. Freq. Meter & Cal
GRX-401 Standard Resistor
non-catalog
W. Bastanier
G-S 1701 Audometer
G-S 1703 Audiometer
G-S 1720 Odoadmittance Meter
GTS-1 Display Panel Tester
1991-3
(Hall, Pillote, Albertini etc)
IND-0300/1801 Numerik Indicators
Apr 1962
LR Interpolator (Freq Meter for Navy)
M-2, M-5 Variac Autotransformer
Jul 1954
G. Smiley
M-10 Variac Autotransformer
Nov 1954
G. Smiley
M-2
Variac Autotransformer
Oct 1954
G. Smiley
MD-1 Fuel Gage Tester
see P-579
MD-2 Fuel Gage Tester
see 1429-A
military designation TTU-68/E
P-174-A Power Level Indicator
1929
Museum has manual
P-205 Timing Equipment
for USCG
“
“
“
P-259 Voltmeter
(donated by Charlie Wenzelberger)
“
“
“
P-261 Portable Calibrator
for USCG
P-330 Std Signal Generator
Museum has manual
P-349 Signal Generator
for USCG
Museum has manual
P-472 Inductance Bridge
P-484 Broadcast Dual Mixer
P-507 Microflash
Sept 1941
P-521 Receiver, made for National Defense Research Committee GR has Man, HPH has photo
P-540 Receiver , P1,P2 &P3 Man
Mar 1947
D.B.Sinclair
Have Manual
P-579 Field Variable Capacitance Tester Sept 1955 P.K.McElroy (MD-1 Fuel gage tester)
P-582 Capacitance Bridge (or 1613) Feb 1958
H.P.Hall (& P.K.McElroy) TTU-24/E
P-583 Emergency Power Supply
Nov 1957
G.Partridge, R.W.Frank
P-1920 Real-Time Analyzer (“Bat Machine” 1965
R.W.Frank, G Partridge
V-2 Variac Autotransformer
May 1952
G.Smiley
V-5 Variac Autotransformer
May 1946
G.Smiley
V-10 Variac Autotransformer
Jul/Aug 1946
G.Smiley
W-5 Variac

Autotransformer
Dec 1955
W-8 Variac
Autotransformer
Apr/May 1963
W-20 Variac Autotransformer
Aug/Sep 1958
W-50 Variac Autotransformer
Apr 1957
X 274 Comparison Bridge
No. Type Number:
Rectangular Potentiometer, made for Harvard Engineering School
Capacitance Unbalance Br. For Cable Testing
May 1929
Universal Gain-Loss Set
see June 1930 p. 9
Impedance Comparator
in room
Feb 1936
J.W.Horton (for human body)
2-Section π Type Filters
(in room)
Vacuum Tube Voltmeter
in room
(sloped panel)
Model 600M Wrapping Station
Cat 73
Made by or with Other Companies:
Acme Appratus Co. Transformers Bull 107, Mar 1921, Bull 113&119 May 1921
P-11, Type 1002A Western Electric Head Phones Bull 901 Jan 1920
G-S 1701 Audiometer
Oct/Dec 1970
R.L.Grason
G-S 1703 Recording Audiometer
G-S 1720 Otoadmittance Meter
GR Today Aut 1973
14
M/S 80 Laser Trim System (Micronetics)
see GR Today Autumn 1973, Cat 73
GR/TEL LCD Tester “Looking Glass” See HPH Papers
TR-47/APR Test Oscillator Nov 1946 R.A.Soderman
Made by Fairchild Camera to GR dwgs
Appendix: Catalog Dates
A
1916
B
1918
C
1919
D*
1921-1927
E
Dec 1928
F
June 1930
F Pt2
April 1931
F Pt3
Oct 1931
G
1932
O
G Pt2 Mar 1934
P
H
1935
Q
J
Sept 1936
R
K**
1939-1945
S
K5
1946
T
L
1948
U
M
Oct 1951
Cat 73
N
Jan 1954
Cat 78
* Catalogs D1, D2 & D3 are collections of Bulletins
**Editions of Catalog K 1939, K2
, K3 1944,
K4 1945,
June 1956
April 1959
May 1961
May 1963
1965
Feb 1968
Feb 1970
1973
1978
K5 1946
GR Radios & Transmitters
149 Radio Transmitter
158 Auxiliary Radio Transmitter made for Bureau of Steam Engineering
BC-14A Radio Receiving Set USA Signal Corps
S.C.R. 112 Batttalion Regiment Set Box
P-521-A Receiver
RESTRICTED
300-1000 MC for field strength measurements.
P-540 Receiver A Search receiver for radar countermeasures which covered the freq range
of 70-1000Mc. Manufactured by Philco. Navy ARC-1, Air Corps SCB-587
Unidentified battery-operated transmitter HPH has photo (from B. Sargen)
Clapp-Eastham Radios
HR & HZ
1921
RADAK R-4 1923
RADAK DD 1925
15
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