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LOW-COST audio Output Transformer vintage AA5 vacuum tube radio - amplifier kit For Sale

LOW-COST audio Output Transformer vintage AA5 vacuum tube radio - amplifier kit
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LOW-COST audio Output Transformer vintage AA5 vacuum tube radio - amplifier kit:
$15.00

Audio Output TransformerLimited stock item - can not be restocked!

This is a hard to find, perfect size for many radios, audio output line transformer, and is an excellent replacement for 5-tube vacuum tube radios, see photos. Also a great transformer to use in vacuum tube audio amplifier kit designs.

These were removed from UN-used equipment, and are in perfect working order. May have some discoloration on the frame.

Twenty five volt line transformer (as in PA - Public Address audio amplifier, not AC power line transformer), which makes an excellent general purpose audio output transformer, see photo for a typical application.

Primary has 4 taps. With an 8 ohm load on the secondary, and using a voltage ratio test, we measured the primary impedances as approximately 3,000 ohms, 1,500 ohms, 600 ohms and 300 ohms.

Nominal resistance of primary taps are 67, 44, 30 and 20 ohms. Secondary resistance is approximately 0.6 ohms.

Nominal size: 1.45" x 1.10" x 1.25" (LxWxH). 1.75" between mounting hole centers.

Perfect replacement transformer for use in All American Five tube radios, low power audio amplifiers, or general experimenter use, see last photo. Radio not included, shown for illustration only.


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The sellermakes no representation of any item(s) sold to be fit for a particular purpose and assumes no liability for its use or misuse. It is assumed that the unit(s) will be installed and operated by qualified personnel. The purchaser agrees that the seller shall not be held responsible or liable for any injuries or damages, whether incidental or consequential, associated in any way with the item(s).


We replaced the output transformer in a typical 5-tube AM radio set.
We noticed no difference in volume or fidelity between the two parts
Part is a perfect fit for many applications.
Radio not included, shown for illustration only.


See our other listings for more antennas, coils and loopsticks

See our other listings for more antennas, coils and loopsticks




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