Audio Output Transformers

[CivicProtection]

I might need a new audio output transformer for my tube stereo.
But I am horrified to see that one site offered at hundreds of dollars! It better be silver wire wrapped in silk insolation, with Marilon Monro's lipstick kiss on the solid gold casing for that kind of cash!

Anyways, it looks to be a single ended tube output transformer.
I saw a diagram on a site and that is what it is called. all I know when I look at the transformer bolted to the chassis on my amp section, there is two wires on one side for the primary and two other on the other side for the secondary. I don't see a center tap.

I asume I will have to replace both of them so both speaker channels sound the same yes? But isn't an output transformer just a stepdown transformer? where do I get this tranny without evacuating my wallet again?

[chrish]

What you have asked is kind of like "I need a new transmission for my car" without giving any further details. You will need to supply more information if you want some useful advice.

You might like to state what model amp you have, what valves it uses, link to a schematic if you have one etc.

Also, you have given no indication of why you think the transformer is defective. It may turn out to be something else. Just replacing parts with no insight as to what the real problem is a way of wasting money with no guarantee of success. What are the symptoms?

Regards,

Chris

[Ty_Bower]

Here's a couple manufacturers who sell transformers. Any one of them couple sell you a pair of single ended output transformers. What else can you tell us about the amplifier? What kind of output tubes does it use?

http://edcorusa.com/
http://hammondmfg.com/
http://transcendar.com/
http://magnequest.com/
http://one-electron.com/
http://electra-print.com/
http://www.turneraudio.com.au/

[CivicProtection]

Originally posted by Ty_Bower
Here's a couple manufacturers who sell transformers. Any one of them couple sell you a pair of single ended output transformers. What else can you tell us about the amplifier? What kind of output tubes does it use?

http://edcorusa.com/
http://hammondmfg.com/
http://transcendar.com/
http://magnequest.com/
http://one-electron.com/
http://electra-print.com/
http://www.turneraudio.com.au/

It seems to use one tube per channel. I am a noob at this so I am going slowly. The tube is called: 6CG7
Thabks for the links.

[planet10]

6CG7 would be a front end tube, not an output tube. Can you post a picture of the amplifier?

dave

PS: you in southern Alberta?

[sorenj07]

6CG7's are more likely to be used in a preamp stage than a power stage. Are there any bigger tubes?

[drj759]

Civic:

Is this for the same amp that you asked about in your other thread:
Left channel BAD in stereo! HELP please! It's my first tube set ?

If so, your output tubes are 6BQ5, not 6CG7.

To repeat Chrish's question: What lead you to the conclusion that you might need a new output transformer?
Have you checked for continuity on the primary and secondary?

[astouffer]

But I am horrified to see that one site offered at hundreds of dollars!

Welcome to the wonderful world of vacuum tube audio No it doesn't get any better

[DougL]

Just a thought: There are several people that can re-wind (repair) an output transformer. This can be less expensive than a pair of new ones.

If you must replace the transformer, knowing exactly what it is will be critical. We can help. A schematic would be a great help.

As with other pursuits, transformers are as much art as science, due to the multiple compromises that are required.
Also, exotic materials and low volume can increase prices substantially. You didn't name the transformer you were looking at or the exact price, but Several hundred dollars is on the high side, but not out of the question.

Doug

[CivicProtection]

Originally posted by drj759
Civic:

Is this for the same amp that you asked about in your other thread:
Left channel BAD in stereo! HELP please! It's my first tube set ?

If so, your output tubes are 6BQ5, not 6CG7.

To repeat Chrish's question: What lead you to the conclusion that you might need a new output transformer?
Have you checked for continuity on the primary and secondary?

Yes it is. But I am afraid that is something is going to fail on something myster machine I just bought it must be one of the most picky and expensive thing on it.

I made a list of ALL the tubes in the thing. I did a continuity test on both the primary and the secondary on both transformers and it passes.