The ART-13 used a single 813 modulated by a pair of 811's. The neat thing
about this transmitter is that the modulating transformer utilized a
tertiary winding to modulate the screen. Also, when an altitude of 10 or 11
thousand feet was reached, the dynamotor, would "down-shift" the plate
voltage to about 800 volts.
Mike(y)
W3SLK
----- Original Message -----
From: Tom Rauch <w8ji@contesting.com>
To: <amps@contesting.com>
Sent: Wednesday, September 20, 2000 10:30 AM
Subject: Re: [AMPS] BC610... no 833's
>
> > Wrongo Tom! The later models, (specifically the I model, which was the
> > last) and the when the government no longer needed them Bill Halligan
> > returned the old HT-4 label to them, always had an a 250-T(L?)
modulated
> > by 100-TH's. The BC-610 was later replaced in military by the durable
> > T-368 transmitter which used a 4-400 modulated by 4-125's, (Not my
choice,
> > I prefer triodes as modulators.). But they were never made with 813's or
> > 833's. Mike(y) W3SLK
>
> I wasn't sure about the 813's, but I knew they never used 833's!
>
> I think I might have mixed up an ART-13 with the BC-610. Was the
> ART-13 the rig with the 813 PA and 810 or 812 modulators?
>
>
> 73, Tom W8JI
> w8ji@contesting.com
>
> --
> FAQ on WWW: http://www.contesting.com/FAQ/amps
> Submissions: amps@contesting.com
> Administrative requests: amps-REQUEST@contesting.com
> Problems: owner-amps@contesting.com
>
--
FAQ on WWW: http://www.contesting.com/FAQ/amps
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
|