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[AMPS] Protection in cathode not plate?

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Subject: [AMPS] Protection in cathode not plate?
From: W8JI@contesting.com (Tom Rauch)
Date: Sun, 21 Jan 2001 00:38:46 -0500
>        I knew something was bugging me about putting the fuse in the
> cathode ckt and it just hit me. If someone has already pointed this
> out forgive me for repeating it. I have not been keeping up with the
> discussion. There is one path easily overlooked in the cathode circuit
> that the current or at least a transient may flow. That is thru the
> transmitter's (usually solid state) output circuitry.  You may protect
> the tube but wipe out your radio.
> 
> 73
> Bill wa4lav

Hi Bill,

Floating the grid in a triode from chassis ground does the same 
thing. 

If you float the grids, it's a good idea to take additional steps to 
protect the exciter from a HV dump through the cathode circuit 
because the odds of having it happen increase.


73, Tom W8JI
w8ji@contesting.com

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