[Amps] filament supply options

[Steven Grant, W4IIV]

thanks for the tip...your correct...wouldnt using DC cause a bias condition that may cause linearity problems?.......steven

"R. Measures" <r at somis.org> wrote:
On Apr 24, 2004, at 10:45 AM, Steven Grant, W4IIV wrote:

> Hi steve
> the voltage shoud be 4.8 volts for maximum tube life. 5 volts or more 
> will cut tube life with very little benifit.
> the reason AC is used has to do with biasing, 5 volts DC with this 
> tube will affect biasing (in many amps, 5 volts is what they use to 
> bias the tube to cut off)

ð Steve : 25v will typically bias a 3-500Z to cutoff. 5v is typical 
operate bias.

> ...
>
Richard L. Measures, AG6K, 805.386.3734. www.somis.org



STEVEN GRANT    W4IIV
		
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