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RE: SE 801A Amp

Posted by euro21 (A) on June 15, 2015 at 06:42:41

In Reply to: SE 801A Amp posted by SteveBrown on June 12, 2015 at 16:40:03:

IMHO 480V B+ is not too much, and 8k:8 for SE is quite a few, I prefer 10k.

Output power with this parameters is about 2.5-3W (A1 mode) -see attachement-.

801a is capable more power (up to 6W), but mostly in deep A2 mode.

See Michimori 3x801a designs,
http://www6.plala.or.jp/Michi/renewal801A/801AX3_parallel_15W_SE%20amp.html

and Stephie Bench 841 amplifier
http://www.jacmusic.com/techcorner/SBENCH-PAGES/sbench/a2part1.html

In my PSE I use 620V B+ (30mA/tube), CCS loaded 841, 10Y as CF, fixed bias 801a//801a and 5k:8 OPT, so power is about 10W (A2 mode).

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