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In Reply to: RE: 6v6 pp power amp posted by burwoodc on January 21, 2015 at 15:38:40
Sansui audio transformers pulled from what model?
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Actually its ive had them so long they could be HK too honestly cant remember but I know it was a 6v6 amp.
A picture, including a ruler, will help. If the "iron" came out of something like a H/K FA3000 receiver, build a triode mode "El Cheapo". That stuff is undersized for the claimed 15 WPC.
I strongly suspect your transformers did not come from a Sansui product. The 500A used 6BM8 "finals", while the 1000A used 7591s.
Eli D.
The iron in my 500A is huge...not so much for 500.
The Mind has No Firewall~ U.S. Army War College.
Thanks for the info, I have some bigger transformer too ill post the info latter
I'm not home right now.
I'm not sure the transformers are stamped ft34239963 8316101
"the transformers are stamped ft34239963 8316101"
I'm pretty sure that's an HK number. Can you post a photo next to a pencil or something like that for scale? How much power do you need from this amp? There's a big difference between triode mode and pentode.
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Buy Chinese. Bury freedom.
I'm almost 100% sure these are the OPT's in the link below. The scale shape etc seems correct.there are what appears to be 8 and 16 ohm taps (green and yellow.)
http://shermanr.web.prw.net/A300_TOP.jpg
Those trafos look like the undersized stuff in a FA3000. Notice the relationship between the model #s. They should be FINE in a triode wired "El Cheapo". I suspect the "iron" is good enough to permit the use of of a 0.068 μF. cap. and a 120 Kohm resistor in the I/P high pass filter, instead of the 0.056 μF. and 100 Kohm parts shown in the schematic.
The "6" WPC a triode wired "El Cheapo" yields combined with speakers of 94 dB. sensitivity will be adequate for all but the most demanding material. The digital cannons in Telarc's 1812 Overture recording might be overdoing things. ;> )
Eli D.
Sorry for the poor pic its taken with my ipod and thats a dime for reference :) I think these came out of a an HK a300 pretty sure. I want nice mids etc I have a small sub I can use to get the jod done for bass but yeah not going for high volume just low to moderate.
one more pic
Here is a side view
Eli's correct about these being smallish for 6V6s. Still, they'll definitely output more power within their limits in pentode mode than triode. I'm pretty sure those transformers were used in both the A-300 amp and TA-224 receiver. You should be able to make a good performing amplifier with them.
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Buy Chinese. Bury freedom.
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