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#1 |
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diyAudio Member
Join Date: Feb 2012
Location: Dunedin, New Zealand
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HI Folks, I've just aquired an old 60's stereogram and i'm thinking of re-purposing it as a small stand alone amp, just for a bit of fun. The existing layout is an ECC82 as preamp, EZ81 rectifier and an ECL82 per channel as the output stage.
What I would like your learned opinion on is weather it would be better to recreate the existing circuit less RF stage/tone controls etc or would it be best to start afresh reuseing as many of the old bits as possible. Any help wuld be greatly appreciated! |
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#2 |
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diyAudio Member
Join Date: Mar 2007
Location: Auckland, NZ
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if you are using a CD, Iphad or computer as a source, you won't need the ecc82.
I'd also go ss rectification so you can go large on power supply caps for smoothing. By then, you are repurposing I guess
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"Folks, you can't prove truthiness with information. You prove truthiness with more truthiness. In a process known as truthinessiness." - Stephen Colbert, The Colbert Report |
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#3 |
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diyAudio Member
Join Date: Apr 2009
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I prefer tube rectification, for me it plays better than ss ...
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#4 | |
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diyAudio Member
Join Date: Apr 2004
Location: Plainsboro, NJ
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Quote:
Some restraint in sizing the 1st cap. of the PSU filter remains necessary. Neither the power trafo overheating nor the "hash" associated with very short charging pulses (tiny conduction angle) is desirable.
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Eli D. Last edited by Eli Duttman; 25th February 2012 at 08:01 PM. Reason: fixed typo |
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