[Amps] Amps Digest, Vol 106, Issue 7

[TexasRF at aol.com]

Most amplifiers meter plate current in the negative plate supply lead which 
 is at or near ground for safety. Strictly speaking, cathode current is the 
sum  of plate and grid currents (plus screen current in a tetrode).
 
73,
Gerald K5GW
 
 
 
 
 
In a message dated 10/13/2011 10:07:54 A.M. Central Daylight Time,  
k7fm at teleport.com writes:

Hi  Dave:

Few amps use a plate current meter.  The reason is  safety.  The meter face 
is the only thing that protects the  operator.  Safer in the cathode.

73,  Colin  K7FM  

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