75.161.94.152
In Reply to: RE: Hey Mike, how about this idea? posted by keto on April 27, 2009 at 16:50:05
Keto,
Only answering your Q 4. I built my preamp for a 26 using a 15K B7 (M6) output and I put the plate choke on jumpers so I could switch between a variety of Mike’s plate chokes. I agree with Mike’s comments that the EXO-010 sounds better then the EXO-99 when I have swapped them back and forth. The 26 at 8mA works fine with the EXO-010 in my system.
I should note that instead of the 26 I usually have some Russian direct-heated subminiature pentode on a four-pin base plugged in--usually the 1J17B (1Ж17Б, 1Zh17B), 1J18B (1Ж18Б, 1Zh18B) or 1P24B-V in that order of preference. With a pair of 9,000mAh NiMH “D” cells in parallel powering each 1J17B filament I get over 200 hours of listening before I have to switch out the batteries. With the 26 I get about 12 hours or so as I’ve been using the same 8 batteries for 5 years now. My speakers probably only go down to about 60hz as well, but I don’t miss any bass with the 26, EXO-010, 15K B7.
Matt
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