[AMRadio] FS: Bogen DB-15, UTC S-22 Mod TF, Sig Gens, VOMs,

John E. Coleman (ARS WA5BXO) wa5bxo2005 at pctechref.com
Wed Jul 26 11:40:54 EDT 2006

Mine used to run some of those tubes but I modified it to use some vertical
output tubes from the TV repair days.  The speech amp is not required to
deliver any power to the modulator as the modulator is AB1 and even in the
days when I once needed more audio and ran the modulator AB2 the solid state
driver did all the work of grid current.  The plates of the Bogen output
tubes or capacitively coupled to the grids of the four 813s and a center
tapped choke feed the bias to the grids


-----Original Message-----
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net] On Behalf Of W5OMR/Geoff
Sent: Wednesday, July 26, 2006 9:12 AM
To: Discussion of AM Radio
Subject: Re: [AMRadio] FS: Bogen DB-15, UTC S-22 Mod TF, Sig Gens,
VOMs,Miscellaneous BA

Jim Candela wrote:
> ----- Original Message ----
> From: Robert Peters <rwpeters at swbell.net>
> To: Discussion of AM Radio <amradio at mailman.qth.net>
> Sent: Tuesday, July 25, 2006 7:40:31 PM
> Subject: RE: [AMRadio] FS: Bogen DB-15, UTC S-22 Mod TF, Sig Gens, VOMs,
Miscellaneous BA
> Hi Don I would like to buy both of the David Bogen... am very familiar 
> With them...Shipping to Dallas please and can I pay pal you???
> Bob W1PE
> rwpeters at swbell.net
> Hey Bob, Those Bogen's will be a neat haul to get going again. One thing
though, I thought you were trying to 'lighten the load' a little? :-)
> Regards, and good luck with them Bogen's

He did.  Bob -thought- he was moving and sold his T-368 (and maybe some 
other stuff) then changed his mind about moving, *after* the T-3 was gone.

For what it's worth, the Bogen CH-120b is the PA system I'm using for 
the speech-amp on my homebrewed rig.  So is John/WA5BXO, but I think 
he's got a different model.  I think his runs (4) 7868's in push-pull 
parallel, while I've got 8417's.

Driving your AM Rig without a scope, 
is like driving your car at night, without headlights. (K4KYV)

73 = Best Regards,

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