ORIGINAL MESSAGE: On Thu, 27 Aug 2009 22:09:19 -0400, Roger <sub1 at rogerhalstead.com> wrote: >Hmmm..filament 20 volts at 1100 amps...I need a larger filament >transformer and a room to put it in. <:-)) REPLY: But you won't need any high voltage DC. The other guy will hear your filament. :-) 73, Bill W6WRT