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[AMPS] What (modern) tube to use?

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Subject: [AMPS] What (modern) tube to use?
From: (Rich Measures)
Date: Thu, 18 Feb 1999 14:55:26 -0800

>The recent "amps" discussion of which tube to use for building a new CW
>amplifier started me thinking ...
>If one were building a new amplifier (or buying one of the new commercial
>units) what tube or tubes in the case of a pair would one use?  Criteria
>are reliability at 1500 watts output, tube cost, availability of replacement
>tubes if needed in the future and overall relability of the amplifier.  The
>100 Amp filaments rule out a "super power" solution like the 4CX5000/8170 or
>4CX10000/8171  ........

?  Filament-current is a mere 75A.  Dahl makes a compact transformer.  
Tube handles are mighty nice.  8171s are typically a good buy in the 
surplus market.  They can be had for under 6-cents per watt.  

-  later, Joe


R. L. Measures, 805-386-3734, AG6K,  

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