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[AMPS] 4CX1000A advice??

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Subject: [AMPS] 4CX1000A advice??
From: (Larry Molitor)
Date: Sat, 14 Mar 1998 21:56:17 +0000
Many thanks to those who replied to my request for 4CX1000A advice. I now
have the info I needed in regard to the question about filament/heater
chokes. However, the other question I asked remains pretty much unanswered.
The question was: 

  Many references have been made to grid damage
  in the 4CX1000A and similar tubes; what are 
  the detailed symptoms of said damage? (Assuming
  the tube still sorta operates)

The only answer I received (from Rich Measures) was:

>The grid in the 8168/4cx1000A is barely visible to the naked eye.  
>Presumably, when the  0w [sic] grid dissipation rating is grossly 
>exceeded, the tiny grid wires melt.   

Forgive me Rich, but I don't think that answer directly addresses the
question. Perhaps you are just being sarcastic by saying if you get any
grid current the tube is destroyed.

Now, I believe the lack of response may be attributed to one or more of the
following reasons:

1) No one really knows squat about a 4CX1000A.

2) Somebody knows, but he ain't talking.

3) The whole idea of 0 watt grids is B.S. and you can run moderate grid
current forever as in the 4CX1500. (Or at least until the neighboring hams
shoot you.)

Comments anyone?

Larry - W7IUV

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