At 07:08 PM 10/7/99 -0700, Pat Barthelow wrote:
>Hi Larry, et al....
>
>I don't understand....Oh, perhaps what you are talking about is
>a different type of plate cap....My 4-400s have simply a metal rod, about
>1/16' dia coming out the top...right out of the glass seal...simply an
>anode extension....
> Others have this AND a larger diamater, set screwed, shouldered fitting
>on it...to which you add your Heat dissipators....Like you see in the
>Eimac pictures.....
>My dissipators, have
>the small hole with setscrew, and horizontal fins... If I dropped the
>dissipator directly down the anode pin, it could rest directly on the
>glass...therefore I raise it off the glass a fraction....
>I surmise that the larger anode fitting must already be floating above
>the glass.....
>
>73, DX, de
>Pat, AA6EG/N6IJ;
Hmmmm. Interesting. What brand tubes do you have, Pat? I have maybe 18 or
so around here. Eimac's, Penta's and Amperex's in the bunch. All of them
have the larger cap set screwed to the (Kovar?) anode lead. The set screws
are usually in so tight, I have to put the defunct tube in the vise and
whack on it a while to get the damn things off. Didn't think they came
without that cap in place. You can learn something new everyday on this list!
73,
Larry - W7IUV
w7iuv@arrl.net
http://www.axtek.com/w7iuv
Amp pix at http://207.108.137.61
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