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[AMPS] New 3-500Z

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Subject: [AMPS] New 3-500Z
From: (Ken Anderson)
Date: Thu, 27 Feb 1997 08:15:54 -0800
I can't comment on the quality of current production Amperex tubes.  
But, I have a pair manufactured in the late 60's in a HB version of a 
Henry 3K.  These tubes have thousands of hours of serious 
contesting and DXing on them without a failure.  N6RO did manage to 
blow a plate choke and a spider blew a bypass cap but no tube 

The word when I built the amplifier was use a lot of air on the tubes.  
I run chimneys and a pressurized lower chassis with an 
oversize blower.

Ken, K6PU 

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