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Old 8th April 2005, 07:11 AM   #1
argo is offline argo  Estonia
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Default 6bm8 / Ecl82 Pse & Srpp

Havenít seen so many 6BM8 / ECL82 PSE or SRPP designs around a net. Am I been blind? So far have found only one schematic of each configuration. Whatís the reason ? -diminishing returns using two valves instead of one, increased PS requirements, difficulties to find a suitable OPT, or sonic degradation by paralleling or cascading the stages.
If it is so popular tube (read - good sounding) why there is not more topologies tried out besides SE and PP?

Argo
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Old 8th April 2005, 07:21 AM   #2
Giaime is offline Giaime  Italy
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In my opinion it is not a good tube... better a 12AU7 and a EL84 that's pretty equivalent... I'm using that tube in a one-tube regen radio... just for fun.

And I seem I cannot find a good NOS one... here I can find only cheap Philips Miniwatt salvaged from TV audio output stages...
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Old 8th April 2005, 07:48 AM   #3
argo is offline argo  Estonia
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Quote:
Originally posted by Giaime
In my opinion it is not a good tube...
It doesnít seem to affect their popularity of use amongst DIYers though. So whatís the fuzz about building with them? Cheap, simple, forgiving design? Kind a vacuum-state GainClone?
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Old 8th April 2005, 08:41 AM   #4
argo is offline argo  Estonia
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uhh... forgot to add the two schematics I have managed to find so far.

first

SRPP+PSE


and second

SRPP


cheers
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Old 8th April 2005, 09:47 PM   #5
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Hi there........6BM8's ECL82's are excellent tubes...esp config as triodes..I use em' as drivers for parallel output hi power p-p o/p stages. I've tried many other ECL types and these offer the lowest distortion in intermediate stages.

richj
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