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Diabolical Artificer · 25th Jun 2017, 6:32 am

Yes, sorry dire video quality, I'll post a a better onesoon. Well spotted but no it isn't. The valve is a RCA 12BH7 direct coupled cathode follower, what your seeing is the red print on the valve. Anodes 400v, 12k6 cathode R's, cathodes at 120v, biased @ -14v = 8mA, within it's 3.5w limit.

Andy.

25th Jun 2017, 6:32 am	#205
Diabolical Artificer Dekatron Join Date: Jul 2009 Location: Sleaford, Lincs. UK. Posts: 7,667	Re: 807 (maybe) amplifier build. Now EL34 Yes, sorry dire video quality, I'll post a a better onesoon. Well spotted but no it isn't. The valve is a RCA 12BH7 direct coupled cathode follower, what your seeing is the red print on the valve. Anodes 400v, 12k6 cathode R's, cathodes at 120v, biased @ -14v = 8mA, within it's 3.5w limit. Andy. __________________ Curiosity hasn't killed this cat...so far.