
Audio & Interstage Transformers - Hermetically Sealed - High Impedance 1,001 Ohms & Up
Audio Transformer
(TA) L284441-1
Primary Z: 12500/25000 ohms
Secondary Z: 150 ohms
Power: 0.05 watts
Bendix audio transformer. Hermetically sealed. Hook terminals. NSN: 5950-645-5383
Audio Transformer
(TA) 6771600000
Primary Z: 1500 ohms
Secondary Z: 1500 ohms
Power: 30 watts
JB audio transformer. Dual primary & secondary. Two channel. Hermetically sealed, electro-statically shielded. Mfg. P/N: 124P287. NSN: 5950-00-228-0805.
Audio Transformer
(TA) 150-B-1133
Primary Z: 1500 ohms
Secondary Z: 1500 ohms
Power: 0.01 watts
Audio transformer. 1500 ohm : 1500 ohm, 10 wv. 300-6K Hz Hermetically sealed. NSN: 5950-845-2297.
Audio Transformer
(TA) 27404
Primary Z: 2500 ohms
Secondary Z: 250 ohms
Power: 1.5 watts
Freed transformer. 2500 ohm : 250 ohm. 500v, 1.5 watts. 1-3/8" x 1-3/8" x 2". Loral P/N: 450-2046.
NSN: 5950-00-646-5039.
Audio Transformer
(TA) 33114
Primary Z: 600 ohms
Secondary Z: 1500 ohms
Frequency Rating: 300 - 3000 Hertz
Freed mil-grade audio transformer.
Audio Transformer
(TA) MT11-AG
Primary Z: 2000/4000 ohms
Secondary Z: 300/600 ohms
Power: 1.6 watts
Microtran audio transformer. NSN: 5950-00-681-7516. New old stock.
Altec Lansing Plate Coupling
(TA) TMJ-217A
Primary Z: 1650/3300 ohms
Secondary Z: 250/500 ohms
Frequency Rating: 15000 Hertz
Altec Lansing scrumptious audio coupling transformer. Sealed. Bottom terminals.
Lionel Plate Coupling
(TM) CU-66/UR
Primary Z: 1750/3500 ohms
Secondary Z: 125 ohms
Power: 10 watts
Lionel Corporation Grade 1 Class A plate coupling transformer. Sealed. Made in 1945 for US Army Signal Corps by Lionel, the model train manufacturer turned military supplier.
Output Transformer
(TA) 186B
Primary Z: 175 ohms
Secondary Z: 30000 ohms
Frequency Rating: 200 - 3500 Hertz
Western Electric output transformer. 200 - 3500 Hz frequency response. Made in 1968. NSN: 5950-235-6758.
Audio Transformer
(TPA) 0-40130
Primary Z: 30000/60000 ohms
Secondary Z: 600 ohms
(2) 600 ohms Series and 150 Parallel
Airdesign Inc. audio interstage transformer. Hermetically sealed. Turret terminals. New, old stock.
Mini Molded PC Mount
(TA) MMT11M
Primary Z: 2000/4000 ohms
Secondary Z: 300/600 ohms
175 wv to ground maximum
Microtran audio transformer.
Collins Transformer,
(COL) 677-2010-00
Primary Z: 6000 ohms
Secondary Z: 3000/6000 ohms
Power: 20 watts
Collins, CTC audio transformer has lots of miles left. Sealed, bottom terminals, flanges.
Audio Transformer
(TA) 1752
Primary Z: 7500 ohms
Secondary Z: 200 ohms
Power: 2.0 watts
Precision Electronics 2 watt audio interstage transformer.
Freed Coupling Transformer
(TA) 31002
Primary Z: 4000/8000 ohms
Secondary Z: 1250/2500 ohms
Power: 12 watts
Freed coupling transformer. Hermetically sealed, electro-statically shielded. 800 working volts to ground. Level = 12 watts. Removed from new equipment.
Audio Transformer
(TA) F25426-1
Primary Z: 9000 ohms
Secondary Z: 2500/5000 ohms
Power: 1.5 watts
Audio transformer. DCR = 30 ohm, 1.5 watts, 18.5 ma.
NSN: 5950-00-645-1856.
Audio Transformer
(TA) DO-T52
Primary Z: 4000/5000 ohms
Secondary Z: 8000/10000 ohms
Power: 0.1 watts
UTC miniature audio transformer. Electrostatic shield. Does not have threaded base.
Audio Frequency Transformer
(TA) 75263
Primary Z: 5000/10000 ohms
Secondary Z: 25 ohms
Power: 10 watts
UTC audio frequency transformer. 10k C.T. to 25 ohm. 10 watts. 1:20 ratio. Hermetically sealed. 1-1/2"D x 2-3/8"H. NSN: 5950-231-4763.
Pico Audio Transformer
(TA) LB225
Primary Z: 9000/10000 ohms
Secondary Z: 9000/10000 ohms
Power: 0.1 watts
TRW Pico audio transformer. 105ºC. NSN: 5950-00-449-1742.
Audio Transformer
(TA) M1407
Primary Z: 9000 ohms
Secondary Z: 3.2 ohms
Power: 2.0 watts
Atlantic Transformer Corp. audio transformer. (Looks like UTC). 2 watts. Electrostatically shielded. Hermetically sealed. Corner posts 1-3/16" c-c. NSN: 5950-00-615-4876. Beautiful!!
Pico Audio Transformer
(COL) 677-0500-030
Primary Z: 5000/10000 ohms (10k c.t.)
Secondary Z: 5000/10000 ohms (10k c.t.)
Power: 0.6 watts
Pico audio transformer. Electrostatically shielded. P/N: L8645.
Collins Transformer,
(COL) 677-2300-00
Primary Z: 1500 ohms
Secondary Z: 3750 ohms
Power: 75 watts
Collins, CTC audio transformer has lots of miles left. Sealed, bottom terminals, flanges. 2 pc. available. 4" x 4-1/2" x 5-1/2"H
Audio Transformer
(TA) TA56
Primary Z: 14000 ohms
Secondary Z: 35000 ohms
Frequency Rating: 11000 Hertz
Audio transformer. Hermetically sealed. 2 : 1 ratio. Turret terminals and posts on bottom. NSN: 5950-00-648-5705.
Audio Transformer
(TA) S6506
Primary Z: 15000 ohms
Secondary Z: 47500/95000 ohms
Frequency Rating: 200 - 10000 Hertz
UTC audio transformer. Round. Hermetically sealed. Hook terminals. 1.175" c-c ears. NSN: 5950-016-4444.
Primary: 15k ohms @ 4 madc
Secondary: 4 terminals - 95k ohms split,
200 - 10,000 Hz, +11 dBM, 175 pk wv
Dimensions: 7/8"D x 1-3/8"H
Freed Matching Transformer
(TA) 31001
Primary Z: 9000/18000 ohms
Secondary Z: 165 ohms
Power: 80 watts
Freed matching transformer. 200 ma. Level = 80 watts. Hermetically sealed. Working volts to ground = 1,100v. Made for 811A circuit. Removed from new, boxed equipment.
Thordarson Plate Coupling
(TA) T56626
Primary Z: 9000/18000 ohms
Secondary Z: 125 ohms
Power: 175 watts
Thordarson Grade 1 Class A plate coupling audio transformer. Sealed. Bottom terminals.
<blockquote> ⢠Frequency Response: 175 watts 500 CPS to 6 KHz
⢠Primary Z: 18k ohm CT (5300 vrms)
⢠Secondary A: 125 ohm (1500 vrms)
⢠Dimensions: 3-3/4"D x 4-1/2"H </blockquote>
Audio Output
(TA) T101
Primary Z: 20000 ohms
Secondary Z: 600 ohms
Power: 2.0 watts
Freed 17042 audio output.
Audio Transformer
(COL) 677-0425-00
Primary Z: 10000/20000 ohms (20k c.t.)
Secondary Z: 600 ohms
Frequency Rating: 200 - 20000 Hertz
Chicago Transformer audio transformer. Hermetically sealed. Rounded corners. Terminals & posts on bottom. 200 - 20,000 Hz I2DB, 265 pwv. NSN: 5950-00-645-0737.
Audio Transformer
(TA) L-382521
Primary: 18.5ma DC winding current
Secondary: 20ma DC winding current
Frequency Rating: 200 - 3000 Hertz
Westinghouse audio transformer. 74 / 10 volts, 20 ma. Turns ratio 1 : 3-13/16. 200 - 3000 Hz. 2" diameter x 2.75" high. Made in 1967. NSN: 5950-00-647-7680.
NOTE: You will need a 2" capacitor mounting clamp.
Audio Transformer
(TA) L284341-1
Primary Z: 10000 ohms
Secondary Z: 60000 ohms
Power: 0.5 watts
Bendix audio transformer. 10k : 60k. 150 - 4500 Hz. 0.5 watt. Hermetically sealed. 0.875" square x 2.5" high. Made in 1954. NSN: 5950-645-0716.
UTC Audio Transformer
(TA) 92157
Primary Z: 50 ohms
Secondary Z: 50000 ohms
Frequency Rating: 50 - 10000 Hertz
UTC audio transformer. Hermetically sealed. Electrostatically shielded brought out to terminal. New, military surplus from the 1950s. NSN: 5950-227-7791.
<blockquote> ⢠Primary: 50 ohms
⢠Secondary: 50k ohms, 50 Hz - 10 KHz
⢠Ratio: 1 : 31-6/10
⢠Dimensions: 1-3/4"D x 2-1/2"H </blockquote>
Audio Input Transformer
(TA) 467737
Primary Z: 500 ohms (tap for 200 ohms)
Secondary Z: 50000 ohms
Power: 0.1 watts
ITC audio input transformer. Hermetically sealed. Turret post terminals. 500 vrms. 0.1 watt, 0.1 - 15 kc. NSN: 5950-645-1933.
Microphone Adapter &
(MIC) 57A120D1
Primary Z: 82 ohms
Secondary Z: 100000 ohms
Frequency Rating: 300 - 20000 Hertz
Microphone adapter and Freed audio transformer. 300 - 20,000 ohms. Includes shield box plus 4 pin flange mount female jack (MS3102A14S) mating with 4 pin inline male (MS3106A14S). New surplus. NSN: 5821-591-3786.
<blockquote> ⢠Primary: 82 ohms, 50 ma
⢠Secondary: 100,000 ohms
⢠Dimensions: 2-1/8" x 2-3/4" x 1-5/8"H </blockquote>
Audio Transformer
(TA) T-1935
Primary Z: 75 ohms
Secondary Z: 100000 ohms
Frequency Rating: 200 - 500 Hertz
UTC audio transformer. Electro-statically shielded. Hermetically sealed. 200 - 500 Hz, 0.06 watt, 150 wv. NSN: 5950-00-328-9795
Audio Transformer
(TA) GAI-7203
Primary Z: 600 ohms
Secondary Z: 120000 ohms
Frequency Rating: 400 - 3000 Hertz
Audio transformer. 400 - 3000 cps. Hermetically sealed, electrostatically shielded. Gold turret terminals. NSN: 5950-00-647-5943.
<blockquote> ⢠Primary: 600 ohms C.T. @ 30 ma
⢠Secondary: 120,000 ohms C.T., 18 dBM
⢠Dimensions: 1.5" x 1.26" x 2.4"H </blockquote>
Audio Transformer
(TA) 14795
Primary Z: 333 ohms
Secondary Z: 120000 ohms
Frequency Rating: 60 - 10000 Hertz
Freed dual primary audio transformer.
NSN: 5950-00-647-6026.
Audio Transformer
(TA) 90401
Primary: 13v / 400 Hz Max
Secondary Z: 2000 ohms
Secondary has two split 2000 ohm coils
ADC audio transformer. 6 solder hooks. Threaded mounting studs. ADC P/N: A16176.
Centroid Inc. Audio Input
(TA) 81175-501
Primary Z: 300/600 ohms
Secondary Z: 250000 ohms
Power: 5.0 watts
Centroid Inc. audio input transformer. Sealed. Bottom terminals.
Primary Z: 1600 ohms c.t.
Secondary Z: 800 ohms
Power: 2.5 watts
Microtran audio transformer. 2.5 watt, 150 Hz-20,000 Hz. Hermetically sealed. Mounts by 4 bottom 6-32 studs @ 1.18" centers. DLA900-88-A-A386.
Primary Z: 293k ohms
Secondary Z: 600 ohms
Frequency Rating: 300-3.5K Hertz
UTC/TRW audio transformer. 300Hz (min) to 3.5KHz (max). Hermetically sealed. Internal electrostatic shield brought out to terminal. Turns ratio 1:22.3. Great headphone transformer for high impedance vacuum tube. DLA900-84-P-7603. K&S G-C_92.
Microtran Audio Transformer
(TA) M3386
Primary: 10k c.t. unbalanced, 10ma DC
Secondary Z: 365 ohms
Power: 9 watts
Microtran Audio Transformer. Hermetically sealed. 70 Hz to 20k Hz. 9 watts. Primary: 10k c.t. unbalanced, 10ma DC. Secondary: 365 ohms. Bottom turret terminals. 2-1/4" x 2" x 3-1/8". Mounting centers 1.68" x 1.43" on 8-32 studs. Made in 1970. Alt. P/N: TF4RX13FA, 1754680.
Audio Matching Transformer
(TA) 8296
Primary Z: 5k ohms
Secondary Z: 600 ohms
Dimensions: 2-1/4" x 2-3/8" x 3"H
Stancor audio matching transformer. Primary: 5000 ohms, 4.15 Hy, 1500 turns (#34 wire). 115 ohms DCR. Secondary: 600 ohms c.t., 40mA, 82 turns (#25 wire), 0.5 ohms DCR. Hermetically sealed. 2-1/4" x 2-3/8" x 3"H.
Audio Transformer
(TA) TF4RX13YY
Primary Z: 4000 ohms
Secondary Z: 600 ohms
3mA DC
Microtran audio transformer. 4k Ohm c.t. to 600 Ohm c.t. 3mA DC. Hermetically sealed. 7/8"D x 1-7/16"H.
Audio Transformer
(TA) DO-T46
Primary Z: 500 ohms c.t.
Secondary Z: 500 ohms c.t.
Power: 25mw
UTC Pico Audio Transformer. Primary: 100k c.t. Secondary: 500 ohms c.t., 300 Hz to 20kHz, 25mw. 100k c.t. to 500 ohms c.t. 3/8"D x 1/2". 1-1/2" gold plated wire leads. Great for vacuum tube to headphone.
Audio Frequency Transformer
(TA) S21605
Primary: 100k ohm c.t. (1,2,3)
Secondary: 100 ohm @ 300mA DC max (4-5, 6-7)
Frequency: 50 Hz Min; 30 KHz Max; 1.0mw Max
Pico audio frequency transformer. Primary impedance: 100k ohm c.t. (1,2,3), 7 wire lead. Secondary impedance: 100 ohm @ 300mA DC max (4-5, 6-7). Frequency: 50 Hz minimum, 30 KHz maximum. 1.0mw max. Hermetically sealed. 105° max temperature. 0.52"L x 0.75" outside diameter.
Range Coupling Assembly
(TA) KS-9929
Primary: up to 20 madc, 680 ohms c.t.
Secondary: 2.5k ohms c.t.
Manufactured by Western Electric
Western Electric range coupling assembly for M33 anti-aircraft gun fire control system. Includes 12 precision resistors 10k to 1 meg. Includes 15 pin Souria connector plug. Gold plated pins, P/N: GS-15134. Vintage Western Electric input transformer, 7/8"D x 1-7/16"H. Turns ratio: 2.5 to 1 ratio, 20 Hz - 20 KHz frequency response. Center tapped primary and secondary. Primary current up to 20 madc, 680 ohms. Secondary: 2.5k ohms. For phase inverting interstage use impedance 15k : 95k. This is a brand new, factory packaged in the 1940's assembly.
Audio Frequency Transformer
(TA) UTC92158
Primary Z: 7000 ohms
Secondary Z: 500 ohms
Power: 10 watts
UTC audio frequency transformer. 7k ohms primary impedance, 500 ohms secondary, 50 Hz minimum, 10 KHz maximum, 10 watts. 1 to 3-3/4 primary to secondary turn ratio. 4 tab solder lug. Center to center between mounting holes 1.875".
Audio Transformer
(TA) 6745-059
Primary Z: 150:24,300 ohms
Frequency Rating: 200 - 6000 Hertz
Manufactured by ETC
ETC audio transformer. 150 ohms : 24,300 ohms. 200 - 6000 Hz. Hermetically sealed. Hook terminals. 1-15/16"D x 1-3/8"H. For military AN/SIA-120A, a shipboard announcing system. Date: 1974.
Audio Transformer 600 ohms C.T. to 5k ohms
(TA) C-1409
Primary Z: 600 ohms
Secondary Z: 5000 ohms
20 - 20,000 cps
Audio transformer. Electrostatically shielded. Octal plug base. Used. Writing is faded.
Audio Transformer
(TA) FHA-25
Primary: 20k c.t. / 5k ohms. 1 mA unbalanced DC. 300 - 20,000 Hz
Secondary: 600 c.t. / 200 ohms
Dimensions: 0.865" x 0.710" x 0.687"H
UTC audio transformer. Hermetically sealed. 0.525" c-c bottom 6-32 mounting studs.
Transformer 208/240V to 800V or 780V @ 350 Milliamps
(TP) 476468-2
Primary Z: 1500 ohms
Primary Z: 1500 ohms @ 350mA
Primary Z: 1500 ohms
Kenyon Transformer Co. transformer. Used, clean. Alt. P/N: S-502365.
Audio Transformer 1M Ohms Center Tapped
(TA) S-514732
Primary: 200 ohms
Secondary: 1M Ohms Center Tapped
Dimensions: 1-1/2"D x 2-1/4"H
Kenyon audio transformer. Hermetically sealed. turret terminals.
Filament Transformer 115V to 5V c.t. @ 6 Amp, 6.3V @ 6 Amp, 6.3V @ 2 Amp, and 6.3V c.t. @ 1 Amp
(TP) 9842
Primary Z: 1500 ohms
Primary Z: 1500 ohms
(5V c.t. @ 6A, 6.3V @ 6A, 6.3V @ 2A, 6.3V @ 1.2A, and 6.3V c.t. @ 1A)
Triad transformer, manufactured for RCA. Corner posts. Hermetically sealed.
0.4 - 3 KHz Audio Frequency Transformer
(COL) 677-6042-000
Primary: 600 ohms Nominal / 1000 ohms
Secondary: 150 ohms Nominal / 600 ohms
300 mW Single Component
Rockwell Collins 0.4 - 3 KHz Audio Frequency Transformer. 6 turret terminals. NOS.
Vintage Audio Transformer
(TA) L2230
Primary: 40k ohms @ 5 mA
Secondary: 1k ohms & 13 ohms (Hermetically Sealed)
Frequency Response: 1000 Hz
Vintage Langevin audio transformer. Hermetically sealed secondary. 1000 Hz. Bottom eyelet terminals. Circa: 1953.
Audio Transformer
(TA) AU-4265
18k CT to 500 ohms
1500v RMS @ 400 Hz Hi-Pot
12 mA / 1 watt
Audio transformer. Hermetically sealed. Circa 1950's.