You are here

Transformer - Output, 8 W, Single Ended

Transformer - Output, 8 W, Single Ended image 1
Click to zoom in
Customer Images:
No Images yet! Submit a product image below!
SKU: P-T31
Item ID: 003561
Price: $13.95
In stock
View Specifications, Files, and Documents


Power 8 W
Primary Impedance 5,000 Ω single-ended
Secondary Impedance 8 Ω
Primary DC Resistance (Red to Blue) 230 Ω
Mounting Centers 2.375"
Mounting Type U-bracket
Weight 0.7 lbs

RoHS Compliant

View Product Measurements

My Project Lists

You must be logged in to add items to a project list.

Specifications, Files, and Documents

Product Reviews

4.88 out of 5 based on 8 reviews

This output transformer got here fast, was inexpensive and works great in a 6V6 amp.

Stu - March 30th, 2016

working great thanks

alexander may - March 24th, 2016

I have installed two of these replacement transformers over the years (and at least one P-T291) and I am convinced this transformer will give your single ended tube radio or amp the best possible performance at the lowest cost. If it is single ended (and not a small AA5 from the miniature tube era), this is the output transformer you need. PERIOD. Don't waste time fretting about impedance matching, DC resistance readings, or the fact that the original speaker is 4 ohm or 3.2 ohms. And don't spend more money than you have to. It's very simple: If you need a new output transformer for a singled ended radio or amp, buy this unit. Your audio will rock! If your radio or amp is a push-pull dual output, buy a P-T291. (But don't use a P-T291 on a single ended unit, even though you can. In my experience, the P-T31 has noticeably better audio on single ended units.)

fjockey - March 18th, 2016

Great when they work. Poor quality control.

Paul Asselstine - January 23rd, 2016

Great little single-ended output transformer for low power applications. I've used it in 2 radio projects -- with an 8 ohm speaker for restoration of a 1928 Sparton with an RCA Type 50 output tube, and with a 4 ohm speaker in a 6CU5-based output stage for AES's 2-tube regenerative radio kit. Superb value. - January 10th, 2016

If you need a single ended output transformer for anything up to and including a 6L6 , this is the best buy you'll find. It works very well . I think the frequency response rating may be a bit conservative , it sounds fairly impressive to me. I just put one of these in a 1952 Philco Golden Grid Instrument amplifier (6L6G) and it worked really well . It's a good purchase for antique work , but probably not for audiophiles .

David Fauver - December 18th, 2015

Perfect audio transformer for single ended tube radios. Very good price.

JOHN A OBRIEN - January 1st, 2015

I recently built a single ended amp based off the 5 watt Fender Champ schematic. I have been building these fore a couple of years now, so I have a pretty good idea as to what they are supposed to sound like. At any event I have used a small variety of single ended transformers from another company and I have to say I have been quite happy with them so far. I stumbled upon the 8 watt single ended transformer at Antique Electronics while purchasing resistors, capacitors and a bunch of other tube amp parts. I was a little leery at first simply because the price was fairly low, so I purchased two of them. My amps still sound like a Black Face Champ. As long as these last and continue to perform well I am sure I will be buying more of them.

leterpand - June 23rd, 2014

Questions and Answers

Click each question to see its answers.
Have a question of your own? Ask us here!