[AMPS] Alpha 374A

[2]

>
>
>
>> >
>> >Hi Rich,
>> >
>> 
>> >
>> >On many rigs the RF out control is too close to other controls and could
>> be
>> >easily bumped into the "gee, I wonder what vaporized the grids in my $400
>> >8874's?" position.
>> >
>> Autopsy shows that the 8874 grid is not damaged by overdrive.  The damage 
>> is to the cathode's  emissive coating - which flakes and shorts the grid 
>>  /photo of flaked cathode in "Parasitics Revisited", Sept/Oct 1990 
>> *QST*./    

>	[Steve Katz]  Well, whatever!  I only know the cost of 8874's
>currently sucks and it doesn't seem to be decreasing, so short of replacing
>them with something else (a serious possibility), I try to take care of
>them...have had one set in one amp for 15 years and still working fine.

//  Taking care means don't exceed 350mA of I-anode per bottle in AŘ 
mode.    

-  R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures.  
end


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