• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

USA sources for Transformers

I've done some basic searching and it seems to me that the sources for transformers suitable for tube amp projects (for Hifi) are in short supply in the US. And it seems to me that NONE of the "higher end" Japanese brands are available here at all (ie., Tamura, Hashimoto, Iso (Tango). Who do we have that build products that compete in that league? Or is Hammond right up there? Who else.


Can you folks list the manufacturers that are readily available in the USA for purchase?


Justin
 
What kind of transformers are you looking for? Push-pull, series feed (SE), power?

US Manufacturers:

One-Electron (Classictone)
Intact Audio
Edcor
Heyboer
Transcendar

Whether they compete with the Japanese brands you mentioned depends a lot on what you're looking for specfically.
 
I’m just looking to build a push pull tube amplifier. I have a fairly large collection of vintage tube amps, and so plenty of iron abounds. But I’d like to think that the state of the transformer art has advanced in the last 60 years. I just finished a dual mono 6V6 amp using old Ampex iron. I quite like it . . . But I wonder what might be accomplished when not confined to old iron from Ampex and Fisher and Knight and Scott.

Hammond seems an obvious choice. But I have heard some of the very fine stuff out of Japan (Leben, Air Tight, etc.,) and the circuits are NOT AT ALL fancy or ground breaking. Which leads to me to believe it has at least something to do with the iron. And NONE of those manufacturers seem to be offered here in the US. So what IS available here? Is there any US competition? Hell, maybe Hammond is just as good. 🤷*♂️ I don’t know.
 
If you want top shelf stuff for push-pull, you'll be looking at a very small number of companies internationally. There are the Japanese options, Sowter, Monolith, Intact, and maybe a few others.

Parts selection, circuit design, and build quality will all contribute to the end results.
 
Sowter is good quality, altough high prices. Not the best of the best but worth the price. And they do customs.

Lundahl is another reputed company which has a broad offering. A swedish company which use automatic wiring machines and can offer competitive prices.
Audio Note offers transformers for DIY, too.

If you want an el cheapo transformer, you can go to asian websites.
 
Last edited:
You asked just on a sad day.

Today I read about respected Audio Transformer manufacturer Magnetic Components/Classictone shutting down after *three generations* because of dramatically falling sales, dramatically rising costs , plust the bullet-in-the-head COVID situation being the straw that broke the camel´s back.

A sad day for US Industry and Audio aficionados:

Classic Tone/Magnetic Components Going Out of Business - Music Electronics Forum


Classic Tone/Magnetic Components Going Out of Business
10-30-2020, 09:44 PM
I got an email from them today stating they’re going out of business in November after three generations. They said tube amp transformer sales have been going down, serious supply chain problems, and the virus has caused them to close. Wow. I’m sure many of us have used their stuff. I was always happy with it. That’s pretty sad. I’m hoping other US transformer companies don’t fall for the same reasons.


Magnetic Components Shutting up Shop
10-30-2020, 06:00 PM
Received a notification today that Magnetic Components aka Classictone are closing down.

"in the last 4 years we have seen a large decline in the tube amp transformer market. At the same time, we experienced unprecedented increases in all costs"

Sad.
 
I've done some basic searching and it seems to me that the sources for transformers suitable for tube amp projects (for Hifi) are in short supply in the US. And it seems to me that NONE of the "higher end" Japanese brands are available here at all (ie., Tamura, Hashimoto, Iso (Tango). Who do we have that build products that compete in that league? Or is Hammond right up there? Who else.


Can you folks list the manufacturers that are readily available in the USA for purchase?


Justin

Tubes USA.com carries ISO iron.