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Re: Say Douglas/813 [message #31122 is a reply to message #31120]

Fri, 27 May 2005 18:22

PakProtector
Messages: 935
Registered: May 2009

Illuminati (2nd Degree)

Hey-Hey!!!,
I think that GK71 is closest to the 813. not that I have used either yet. I am leaning towards lower voltage filaments. the ratio of filament AC over DC g1 bias looks like an important one to make small...

The 813 is a DH valve with a 10V/5A filament. The Russians did seem to go for 20V filaments for some reason. The 4E27 I am experimenting with is a 5V/7A filament. I think it's a worthwhile valve to play with. I did not turn up any detailed info on the GU13

and now for the SE thing....I have not yet built a SE power stage. No plans to do SE either.
regards,
Douglas

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[Message index]

		Say Douglas/813 By: Manualblock on Thu, 26 May 2005 17:31
		Re: Say Douglas/813 By: PakProtector on Fri, 27 May 2005 18:22
		Re: Say Douglas/813 By: Manualblock on Fri, 27 May 2005 20:20

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