Thanks. I have learned yet another acroymym.
Gary
WA6FGI
snip
----- Original Message -----
From: Will Matney
To: amps@contesting.com
Sent: Friday, November 19, 2004 11:10 AM
Subject: Re: [BULK] - [Amps] tube flatulence - gettering
ZSAC = Zero Signal Anode Current
Will
Gary Smith wrote:
>Gotta ask: what is "ZASC" ?
>Gary
>WA6FGI
>
>snip
> ----- Original Message -----
> From: Steve Katz
> To: 'jsb@digistar.com'
> Cc: Amps@contesting.com ; amplifiers@qrq.us
> Sent: Friday, November 19, 2004 10:11 AM
> Subject: RE: [BULK] - [Amps] tube flatulence - gettering
>
>
> Aren't all 3-400Zs now 30+ years old? -WB2WIK/6
>
> > Question:
> >
> > I was given a homebrew single 3-400Z amplifier which works but I noticed
> > with ZSAC the top of the glass envelope has a very faint blue hue when
> > looking across the top of the tube envelope. When looking down at the
top
> > of the tube I don't see this color, only when looking across the top -
> > keying CW does not pulsate the color, the blue hue is the same regardless
> > of output power. I have a couple other old junk clunker 3-400Zs that do
> > the same.
> >
> > Is this normal or is it an indication of gas?
> >
> > I have some 8163 Amperex 3-400Z in a Drake L4 that do not exhibit this
> > coloration, ever. The Eimac 3-400Z tubes do, even after having been used
> > to produce enough output RF to turn the anode reddish-orange for 10-15
> > seconds. Or does the getter not getter that quickly...
> >
> >
> >
> > thanks
> >
> > 73 Jason N1SU
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
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