[Amps] multi-tube amplifiers

[Bill Turner]

ORIGINAL MESSAGE:

At 05:54 AM 5/26/2006, Harold  Mandel wrote:

>Many years ago I built a transmitter that used 4 metal 6L6's inverted
>in an oil bath for a whopping 125 watts on 40 meters.

*********** REPLY SEPARATOR ***********

This used to be pretty common, but isn't really good design because 
the metal shell of a 6L6 is not thermally connected to the anode 
except by radiation. If you've ever cut open a metal 6L6, you'll see 
the innards are enclosed in a small glass tube which floats inside 
the shell - a far cry from a true external anode tube.

Back when we were teenagers it was pretty impressive none the less. :-)

Thanks for the memories, Hal.

73, Bill W6WRT