Audio & Interstage Transformers - Open Frame

(TA) 155-149496

10 watts

Ensign audio output transformer. PC mount. 10 watt. 10 tap input with DCR's ranging from 200 to 700 ohm. We do NOT know the corresponding impedances. 8 ohm output leads with spade terminals. 1-9/16" x 1-7/8" x 1-1/4"H.

NOTE: This is a protected component and a specific drawing is not available.

(TA) TA42

Primary Z: 250/500 ohms (40 ohm DCR)
Secondary Z: 4/8/16 ohms (1.2 ohm DCR)
Dimensions: 3/4"L x 1"W x 3/4"H

Stancor output transformer. 300 mw.

(TA) M7418

Primary Z: 1000/2000/4000/8000/32000 ohms
Secondary Z: 0.5/2/8 ohms
Frequency Rating: 70 - 10000 Hertz

Beautiful audio transformer made by Microtran. Open frame, epoxy. 10 watts, 1:64 turns ratio.

(TA) 24571

Primary: 1/2 - 1 - 2 - 4 - or 8 Watts
Secondary Z: 4/8/16 ohms
Dimensions: 1-1/2"L x 1-5/8"W x 1-7/8"H

70.7 volt line transformer.

(TA) 87485157P1

Primary Z: 20000 ohms @ 10mA
Secondary Z: 300 ohms (425 ohm DCR)
Frequency Rating: 300 - 3500 Hertz

Dual section audio transformer. Rounded corners, aluminum cover. Made in 1968. NSN: 5950-645-3266.

(TA) 1361-1-470

Primary: 470µ H (0.05 ohms DCR) 2.2 Amps
Secondary; 470µ H (1:1 ratio)
Dimensions: 7/8"L x 3/4"W x 3/4"H

Ferrite cored 470 µH: 470 µH PC mount audio transformer.

(TA) A14420

Primary Z: 75/150/300/600 ohms
Secondary Z: 75/150/300/600 ohms
25 watts

ADC 25 watt audio transformer. Electrostatically shielded. Hermetically sealed. Harris P/N: 478-0239-000.

• 600 ohm c.t. : 600 ohm c.t.
• 600 ohm c.t. : 150 ohm c.t.
• 150 ohm c.t. : 150 ohm c.t.

(TA) L12-200-16027

18 ohm DCR : 24 ohm DCR
Dimensions: 5/8"L x 9/16"W x 9/16"H

Great Electrical Corporation input transformer. 18 ohm DC Resistance to 24 ohm DC Resistance. Not exactly sure what the impedance is of this little jewel. It is excess from a 1980's era manufacturer. 5/8"L x 9/16"W x 9/16"H. Made in Taiwan.

(TA) 2829

Primary Z: 2500/10000 ohms
Secondary Z: 25000/100000 ohms
Dimensions: 2"L x 2-3/4"W x 3"H

Hard to find antique Hollywood Transformer "Hollytran." Interstage transformer for vacuum tube amplifiers. Octal plug base. All have dual independent windings on the same core. See (CNE) 11P-JACK for mating connector. 2" x 2-3/4" x 3"H. Made in 1950's.

(TA) 2828

Primary Z: 6250/25000 ohms
Secondary Z: 5/20 ohms
Dimensions: 2"L x 2-3/4"W x 3"H

Hard to find antique Hollywood Transformer "Hollytran." Interstage transformer for vacuum tube amplifiers. Octal plug base. All have dual independent windings on the same core. See (CNE) 11P-JACK for mating connector. 2" x 2-3/4" x 3"H. Made in 1950's.

(TA) 2830

Primary Z: 50/200 ohms
Secondary Z: 25000/100000 ohms
Dimensions: 2"L x 2-3/4"W x 3"H

Hard to find antique Hollywood Transformer "Hollytran." Interstage transformer for vacuum tube amplifiers. Octal plug base. All have dual independent windings on the same core. See (CNE) 11P-JACK for mating connector. 2" x 2-3/4" x 3"H. Made in 1950's.

(TA) 2827

Primary Z: 50/200 ohms
Secondary Z: 30000/120000 ohms
Dimensions: 2"L x 2-3/4"W x 3"H

Hard to find antique Hollywood Transformer "Hollytran." Interstage transformer for vacuum tube amplifiers. Octal plug base. All have dual independent windings on the same core. See (CNE) 11P-JACK for mating connector. 2" x 2-3/4" x 3"H. Made in 1950's. NOTE: Only two remain. They are ugly. Some rust and scratches. Will need repainted.

(TA) 2831

Marked: IND. 200 - 50 H, 100 CPS
Dimensions: 2"L x 2-3/4"W x 3"H

Hard to find antique Hollywood Transformer "Hollytran." Interstage transformer for vacuum tube amplifiers. Octal plug base. All have dual independent windings on the same core. See (CNE) 11P-JACK for mating connector. 2" x 2-3/4" x 3"H. Made in 1950's.

(TA) MMT26-FB

Primary Z: 300/600 ohms @ 10mA DC
Secondary Z: 300/600 ohms @ 22dB
Frequency Rating: 200 - 15000 Hertz

Microtran® audio transformer. 600 ohm C.T. : 600 ohm C.T., 10 madc, 22 dB, 200 Hz - 15 KHz. 1.18" x 0.813" x 0.468". NSN: 5930-00-905-4103.

(TA) T2104

Primary Z: 600 ohms
Secondary Z: 600 ohms
Frequency Rating: 300 - 3500 Hertz

Tamura-Microtran audio coupling transformer. FCC68 coupling. Four pin, no center tap. Model # TTC-110.

(TA) 050-7001-00

Input: 23v
Output: 15.5v, 21.9v, 25v & 70.7v
Watts: 66.6

Foster audio output transformer. 50 Hz - 20 KHz. 66.6 watts.

(TA) A-16884

Primary: 600 ohms c.t.
Secondary: 200 / 600 ohms c.t.
200 - 5000 ohms + 20 dBM

Audio transformer. Hermetically sealed. Rounded corners. 10 turret terminals. Made in 1977.

(TA) ASST1

Merit audio transformers. 3 piece assortment. NOS. DC: 1957 - 1965. Made in the USA. Includes one of each:

• A-4108; 10w audio output, Primary: 35 ohm C.T.
• A-3012; 3w audio output, Primary: 10k ohm C.T.
• A-4096; 5w audio output, Primary: 1k ohm C.T.

(TA) ASST2

Merit transformers. 3 piece assortment. NOS. DC: 1953 - 1965. Made in the USA. Includes one of each:

• A-3012; 3w audio output, Primary: 10k ohm C.T.
• A-3001; Vertical Block OSC
• A-3023; Tube to Line, 5k ohm / 10k ohm / 20k ohm C.T.

(TA) ASST3

Merit interstage transformers. 4 piece assortment. NOS. DC: 1957 - 1965. Made in the USA. Includes one of each:

• A-2742; Primary: 50k ohm C.T.
• A-2771; Primary: 3k ohm C.T.
• A-2777; Primary: 5k ohm C.T.
• A-2783; Primary: 15k ohm C.T.

(TA) ASST4

Merit interstage transformers. 5 piece assortment. NOS. DC: 1957 - 1965. Made in the USA. Includes one of each:

• A-2757; Primary: 250 ohm C.T.
• A-2759; Primary: 500 ohm C.T.
• A-2769; Primary: 2k ohm C.T.
• A-2775; Primary: 5k ohm C.T.
• A-2785; Primary: 16k ohm C.T.

(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.

(TA) 050-7002-00

Primary Z: 150/300 ohms
Secondary Z: 150/300 ohms
Manufactured by Schumader

MFG Schumader for university sound. 150 watt audio transformer. 3 3/8" x 3 1/2" x 2 3/4"H. Blue-Red wnd 1. Black-yellow-orange-green-brown-winding 2.

(TA) M61

Primary Z: 40/30/10 ohms
Secondary Z: 3 ohms

Audio transformer PA-Co made in Japan M-61.. 2 1/2" x 2 3/4" x 3"H. Primary taps 40 Ω, 30 Ω, & 10  Ω DCR. Secondary 3 Ω DCR. Unknown impedance. 40 watt core.

(TA) 910059

Primary Z: 0.4 ohms
Secondary Z: 2.5 ohms
Manufactured by Heyboer

Heyboer audio transformer. 2 1/2" x 2 3/4" x 3"H. Primary .4 Ω c.t. Secondary 2.5 Ω with tap @ .5 Ω.

(TP) T-14A92

Primary Z: 8 ohms
Secondary Z: 90k ohms

Thordarson interstage transformer. 3/8" x 1 5/8" x 1 3/8". 1/2 #'s. Turns Ratio: 3:1. 10k ohms Secondary 90k ohms. Primary 8.

(TA) 20A42

Primary Z: 208/5000 ohms
Secondary Z: 60000 ohms
Manufactured by

Thordarson input grid transformer. 208  Ω microphone and 5000  Ω plate. to 60,000  Ω grid. 1 3/8" x 2 x 1 1/2H.

(TA) CU-750WL

Primary Z: 5, 2.5, 1.25, .62, .31 watts ohms
Secondary Z: 4 & 8 ohm ohms

Audio transformer, open frame. 9 wire leads. 2.95" overall length x 1.5" overall width x 1.4" overall height. Tapped primary watts 5, 2.5, 1.25, .62, .31 watts.