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Old 17th October 2011, 02:53 AM   #1
kenben is offline kenben  United States
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Default 1st project salvaged sears receiver iron need good amp schematic

I have a sears receiver with a 12ax7 and 6bq5 se it has 295 b+ . after looking around on the net. I am thinking that the OPT are probably smaller than most of the amp I have seen and was wondering if any one has advice on what’s best to build with these parts ? would like to run out put pentode mode. Thank you
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Old 17th October 2011, 03:51 AM   #2
TheGimp is offline TheGimp  United States
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It would be helpful if you could find the original model number and a schematic.

Off the hand, I'd recommend Baby Huey.

EL84 Amp - Baby Huey

It is a long thread, but well worth reading as it is quite educational.
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Old 17th October 2011, 04:32 AM   #3
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Single-ended? RH84.
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Old 17th October 2011, 04:33 AM   #4
kenben is offline kenben  United States
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I have looked but no luck on finding it. It is a single ended amp with one 12 ax7 ½ for each channel and one 6bq5 for each cannel was going to pull the transformers and make a small power amp doesn’t’ have to be same design that it is just something that sounds good. It’s a receiver so it should have more power than it needs from the power supply just powering a power amp. Thanks for your response Gimp
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Old 17th October 2011, 04:38 AM   #5
kenben is offline kenben  United States
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rh84 probable has much bigger OPT would that make a diferance if i just kept the volume down or would i have to change other values
thanks
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Old 17th October 2011, 04:50 AM   #6
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the standard opts will be fine - one of the distinctions of the RH is its tolerance of a wide range of opts. Otherwise, just follow the schematic.
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Old 17th October 2011, 04:57 AM   #7
kenben is offline kenben  United States
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Thanks I’ll order some parts tomorrow
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