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In Reply to: Mullard ECC32 for ATMA-SPHERE MA-2 posted by johnax on December 14, 2004 at 19:41:56:
There are a few notable differences between ECC32 and 6SN7 types:- ECC32 has 950mA filament vs. 600mA for the 6SN7
- ECC32 is rated with a Mu of 32 vs. 20 for 6SN7
- ECC32 is rated for a max plate voltage of 300V vs. 450 for the 6SN7.The difference in gain is substantial (over 50% more voltage gain) and will certainly make the amplifier's input more sensitive - which may have a negative impact on total distortion. Considering the high absolute voltage differential in the MA-2 driver section (over 800V, though during operation the device sees half of this) I'd be a tad shy about plugging in one or more of these spendy NOS devices. This said, the 6SN7s are bulletproof in this amp.
All in all, I think this is a good tube to _sell_ ;-)
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Follow Ups
- Re: Mullard ECC32 for ATMA-SPHERE MA-2 - Legendre 09:20:35 12/20/04 (0)
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