[TMC] Sideband Exciters

[Robert Downs]

I have many of the TMC manuals.  There are actually two possible reasons for the "A" suffix on the SBE-2A.  The first was the addition of an ALDC (Automatic Load Drive Control) mod for the SBE-2.  But the slightly later one and more likely the reason for the "-A" was a kit of parts to optimize operation at about 250 mW PEP output (the SBE-2 was rated at up to 1 W output).  The kit consisted mostly of resistors of slightly different values from those in a stock SBE-2.

Robert Downs


-----Partial Original Message-----

> > ________________________________
> > From: BERMAN <triodes at optonline.net>
> > Sent: Friday, August 27, 2021 2:52 PM
> > To: Meir Ben-Dror WF2U; Nick England
> > Cc: George W1LSB via TMC
> > Subject: Re: [TMC] Sideband Exciters
> >
> > Meir, thanks for the input on the SBE-series of exciters.
> >
> > I have a model SBE-2A (not SBE-2) exciter integrated within my GPT-750. Do you (or anyone else here) know how the SBE-2A differs from the SBE-2 or the later SBE-3?
> >
> > I ask this as I was unaware that the SBE-3 and later variants were less of "a pain in the neck" when compared to those units that were of the earlier pre-SBE-3 design.
> >
> > 73,
> >
> > Bruce, W2XR
> >