Dual Winding Toroidal Transformer for Sale

AAK · 02:39 PM

I have ten costume made dual winding Avel Linberg transformers for sale. Originally designed for a Hybrid Amplifier but will also work for a standard 100 watt/8 ohms SS amplifier since there's two 35VAC/230VA windings on a single core. The transformers have never been used. I'm asking $125.00 for each shipping included. Attached is a pic of the transformer, wiring diagram, and specs.

Al

AAK · 03:39 AM

Two sold so far, eight to go.

Keep in mind these transformers are custom made, one of kind and very expensive to make easily costing over $250.00. Purchasing separate transformers to match the six windings on this single transformer would add up to about $300.00. Not to mention the difficulties of situating and wiring all the separate transformers.

AAK · 01:11 PM

I'm now asking $110.00 for the transformers including shipping, it's my final offer. I've attached a pic of one my dual 100 watt SymAsym amps using one of the transformers for reference.

GordonW · 18th January 2012, 01:14 PM

Hey, one suggestion- these could also be used for a pure tube amp.

How? Take the two 35-0-35 windings, and connect them in series. Ignore the center taps. This will give a single 140v winding. Then, use that single winding, with a voltage doubler... voila, about 350v DC at up to about 380ma or so! That's enough for PP or parallel-SE Class A EL34s or 6L6GCs or such...

The existing 260v windings could be used for other functions- negative rails for bias, front-end tubes, or such...

You might have to find some additional heater current for output tubes... but 6.3v transformers are cheap.

Regards,
Gordon.

AAK · 18th January 2012, 02:17 PM

Thanks Gordon for pointing out the flexibility the transformer provides.

Best Regards,

Al

AAK · 24th January 2012, 04:17 PM

Now $95.00 including shipping in the US. My rock bottom price.

AndrewT · 24th January 2012, 04:21 PM

What is the total VA of the secondaries? I just added them together to get >500VA.

Do you give a credit to the early purchasers, now that you have reduced your asking price?

AAK · 04:52 PM

It's about 460VA on the 35VAC outputs. Why do you care, that's between them and I?

AAK · 4th February 2012, 12:37 PM

I still have seven transformers available for $95.00 shipping included.

AAK · 23rd February 2012, 06:32 PM

I still have seven transformers available for $90.00 each shipping included.

9th January 2012, 03:37 AM	#2
AAK diyAudio Member Join Date: Jul 2004 Location: Florida	Two sold so far, eight to go. Keep in mind these transformers are custom made, one of kind and very expensive to make easily costing over $250.00. Purchasing separate transformers to match the six windings on this single transformer would add up to about $300.00. Not to mention the difficulties of situating and wiring all the separate transformers. __________________ Love when you can, Cry when you have to, be who you must, that's part of the plan. Last edited by AAK; 9th January 2012 at 03:39 AM.

18th January 2012, 01:14 PM	#4
GordonW diyAudio Member Join Date: Mar 2005 Location: Marietta/Moultrie GA	Hey, one suggestion- these could also be used for a pure tube amp. How? Take the two 35-0-35 windings, and connect them in series. Ignore the center taps. This will give a single 140v winding. Then, use that single winding, with a voltage doubler... voila, about 350v DC at up to about 380ma or so! That's enough for PP or parallel-SE Class A EL34s or 6L6GCs or such... The existing 260v windings could be used for other functions- negative rails for bias, front-end tubes, or such... You might have to find some additional heater current for output tubes... but 6.3v transformers are cheap. Regards, Gordon. __________________ Speaker Design, Restoration and Repair- since 1985.

18th January 2012, 02:17 PM	#5
AAK diyAudio Member Join Date: Jul 2004 Location: Florida	Thanks Gordon for pointing out the flexibility the transformer provides. Best Regards, Al __________________ Love when you can, Cry when you have to, be who you must, that's part of the plan.

24th January 2012, 04:17 PM	#6
AAK diyAudio Member Join Date: Jul 2004 Location: Florida	Now $95.00 including shipping in the US. My rock bottom price. __________________ Love when you can, Cry when you have to, be who you must, that's part of the plan.

24th January 2012, 04:21 PM	#7
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	What is the total VA of the secondaries? I just added them together to get >500VA. Do you give a credit to the early purchasers, now that you have reduced your asking price? __________________ regards Andrew T.


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24th January 2012, 04:26 PM	#8
AAK diyAudio Member Join Date: Jul 2004 Location: Florida	It's about 460VA on the 35VAC outputs. Why do you care, that's between them and I? __________________ Love when you can, Cry when you have to, be who you must, that's part of the plan. Last edited by AAK; 24th January 2012 at 04:52 PM.

4th February 2012, 12:37 PM	#9
AAK diyAudio Member Join Date: Jul 2004 Location: Florida	Update I still have seven transformers available for $95.00 shipping included. __________________ Love when you can, Cry when you have to, be who you must, that's part of the plan.

23rd February 2012, 06:32 PM	#10
AAK diyAudio Member Join Date: Jul 2004 Location: Florida	Update, now $90.00 I still have seven transformers available for $90.00 each shipping included. __________________ Love when you can, Cry when you have to, be who you must, that's part of the plan.

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