[R-390] R-1247 Nasa Receiver FOR SALE

[Dave Merrill]

On Fri, Feb 26, 2010 at 7:54 AM, John Vendely <jvendely at cfl.rr.com> wrote:

>
> Conversion of older equipment to SSB and frequency synthesis was a big
> deal there for a while, and Manson Labs did a lot of business in this
> market.  They offered their upgraded R-390  systems on the commercial
> market as well, usually featuring a synthesizer system which tuned in
> 100 cps steps (Manson Laboratories Model 299).  However, they weren't
> very successful.  They also produced a very similar synthesizer/SSB
> upgrade for the Collins AN/FRT-24 transmitter.  TMC also did an R-390A
> synthesizer upgrade using equipment of their design.
>

John,

Would the TMC version be the R-1981/TSC-25?

/dave
N9ZC