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lower mu... [message #30964 is a reply to message #30961]

Mon, 14 March 2005 05:05

PakProtector
Messages: 935
Registered: May 2009

Illuminati (2nd Degree)

Nope, you have it. A few more LED's will be all. More current is a 'tweak' level of change. 6 or so LED's and another socket will be all that is required.

You'll be pulling a little bit more heater current. Still going to be 12.6, but at 0.6 A instead of 0.5 A. Some tweaking of the R's in filament supply might be needed if you want exactly 12.6. 12-13 ought to be fine IMO...

The 12B4's are mu 6.5 and until you increase heater current or get octal valves, it is the best. Maybe the best without caveats.
regards,
Douglas

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[Message index]

		throw another preamp on the fire, boys! By: Forty2wo on Sun, 13 March 2005 19:03
		Re: throw another preamp on the fire, boys! By: Manualblock on Sun, 13 March 2005 19:13
		Re: throw another preamp on the fire, boys! By: Forty2wo on Sun, 13 March 2005 20:22
		lower mu... By: PakProtector on Mon, 14 March 2005 05:05
		Grid stoppers By: colinhester on Sun, 13 March 2005 20:45
		Re: Grid stoppers By: Forty2wo on Mon, 14 March 2005 22:15
		Re: Grid stoppers By: colinhester on Tue, 15 March 2005 22:14
		Re: Grid stoppers By: Forty2wo on Wed, 16 March 2005 16:20

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