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Ben_Tech 2nd September 2006 10:38 PM

WTB: Transformer - 115v pri, around 22v dual sec

I'm building a multichannel gainclone project, but the usual $40-$60 shipped price of surplus transformers is going to break the budget on this project.

If you can help me out, I am looking for a great deal on a like-new (or brand new) transformer with the following specs:

110-120Vac input, output: two secondaries around the 19Vac to 24Vac range.

22 or 23 Vac would be the ideal value.

As far as VA goes, I'll need anywhere from 400VA to 750VA... yes a rather big one. :) A pair of transformers around half that, or even 5 or 6 smaller ones would do it too, as long as they are at least 80VA each, it should be enough.

Email or post here if you can help -- thanks.

Apex Jr 3rd September 2006 05:32 PM

Kind of good news....
I have some toroids that are 42Vct 21-0-21 at 80Va
in stock at $12.50ea.
However at this time I'm on vacation until Sept 13th
and can ship then if you can wait.
They are pictured on my website under the misc section

Steve @ Apex Jr

Ben_Tech 3rd September 2006 08:26 PM

Hi Steve,

Yes, I saw those and they look ideal... but.... it would be $75 plus tax plus shipping for enough of them to make a six channel amplifier. (They say the gainclone requires 80VA to 150VA per channel.)

I appreciate the reply though!

If I decide to make a dual mono stereo amp at some point this might be the way to go. :)

KBK 4th September 2006 12:46 AM

this guy might have what you need, in the price range you are looking at.

You can also do a search for low powered stereo amps, that have dual transformers.

Some of the little Akai, Sansui, HK and Hitachi units are DUAL MONO in the transformer sections. Beware, though, for example, the Hitach units are sometimes single sided transformers, where the split rail is created with the two single output ransformers. The HK units are fully dual mono, to my recollection. Buy a dead one (about 30wpc) and scoop the transformers. Look around.

Lots of ways to do it on the cheap. Hit the local audio shops, clean out their garbage! Take home their unwanted crap and they will love you. scoop the transformers. Find two or three identical units, like old mid-80's pioneer recievers, in the 30-40WPC range. You will find HUNDREDS of them. All the free High VA transformers you can possibly eat.

This was my old behaviour-get and use what you can! Transformer technology hasn't changed enough to make ANY of that sutff unworkable. Not likely to change either. Now I'm all holy and the like and only use new stuff. ;) But I still take out the time to steal other folks french fries.

Seriously, though, hit the repair shops, take what they have, clean the parts out of them. Heatsinks, transistors, specialist brand capacitors, etc. Transformers rarely fail, so you will certainly have your fill of those!!

Do me a favour, though, don't kill the little HK recievers. They sound too good.

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