[Amps] Machlett 3-500Z tubes

Bill Turner dezrat at outlook.com
Sat Nov 26 05:41:28 EST 2016


Whatever brand you buy, make sure the filament pins are one solid,
welded piece and not a wire soldered to a pin. I am told Amperex tubes
are welded and there may be others. 

The soldered pins are notorious for the solder melting.

73, Bill W6WRT


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