|[AMRadio] Re: FS: restored Gonset G-76|
ne1s at neandertech.com
Wed Feb 8 17:07:21 EST 2006
Can't comment on the stock G-76 or it's audio, but the triode connection on
the 6DQ6 modulators is a perfectly valid & workabel, if uncommon and poorly
documented, mode of operation.
I have used such a connection with 6146's - audio input to screen grids,
with control grids either grounded or just a few volts negative - in an
Apache, and a Viking I (which can be heard on the east coast every Tuesday
nite on the Gray Hair Net on 1.945 MHz), and in this mode the tubes are
capable of much cleaner audio than they ever would be connected as
beam-power tetrodes. The downside is they require more drive.
Brett gazdzinski writes:
> And the TX audio sucks (surprise!).
> The audio driver transformer (also the receive audio output trans)
> is a weak point, as are the crazy triode connected (audio to the screens)
> 6DQ6 modulator tubes (zero bias).
> No specs for a 6DG6 as a zero bias triode connected using the screens....
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