intelligence pool tap needed

[Bill - KK4XI]

Hi Phil,

I can not answer your Kenwood query but I can answer
your tube rejuvenate question I hope. I am going back
a few decades so bare with me. If I am wrong someone
correct me.

A tube filament after long use of on and off on and
off etc etc starts to build up a crust on top of the
filament. This crust prevents the proper amount of
electron flow to the plate.

A rejuvenation of the tube is nothing more then
increasing the filament voltage to a much higher
voltage for a short time which hopefully burns off the
crust. (Can not hurt if the tube reads weak mutual
conductance anyway).

Old TV CRTs, being very expensive to replace, had it
tried once or twice to see if the pix got brighter. If
it did not work a filament voltage booster was
connected to the CRT to burn the filaments brighter
and see a picture for a little while longer before it
died.

Hope this helps Phil. God bless and have a very Merry
Christmas.

73 es GLITC,
Bill




--- spalletta <spalletta at RCN.COM> wrote:

> I need to replace a couple of RF chokes ( they look
> heated and dark but 
> not destroyed ) how do i figure the value of them if
> information is 
> limited ? its on a Kenwood TS-940S RF board T2 and
> T3 , also how does a 
> rejuvenator work on tubes my thinking is when a tube
> is exhausted its 
> mineral its gone? Thanks Phil K1PAS
> 
>
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