Dual Winding Toroidal Transformer for Sale - diyAudio
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Old 23rd December 2011, 02:32 PM   #1
AAK is offline AAK  United States
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Default Dual Winding Toroidal Transformer for Sale

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
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Last edited by AAK; 23rd December 2011 at 02:39 PM.
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Old 9th January 2012, 03:37 AM   #2
AAK is offline AAK  United States
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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.
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Old 18th January 2012, 01:05 PM   #3
AAK is offline AAK  United States
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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.
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Old 18th January 2012, 01:14 PM   #4
GordonW is offline GordonW  United States
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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.
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Old 18th January 2012, 02:17 PM   #5
AAK is offline AAK  United States
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Thanks Gordon for pointing out the flexibility the transformer provides.

Best Regards,

Al
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Old 24th January 2012, 04:17 PM   #6
AAK is offline AAK  United States
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Now $95.00 including shipping in the US. My rock bottom price.
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Old 24th January 2012, 04:21 PM   #7
AndrewT is offline AndrewT  Scotland
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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?
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Old 24th January 2012, 04:26 PM   #8
AAK is offline AAK  United States
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It's about 460VA on the 35VAC outputs. Why do you care, that's between them and I?
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Old 4th February 2012, 12:37 PM   #9
AAK is offline AAK  United States
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Default Update

I still have seven transformers available for $95.00 shipping included.
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Old 23rd February 2012, 06:32 PM   #10
AAK is offline AAK  United States
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Default Update, now $90.00

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