[Boatanchors] need advice aboutt SSB adaptors

[Richard Knoppow]

      The TMC adaptors definitely work for 455Khz.  I think if you use 
manual tuning you can also use them for 500Khz, for instance for the 
51J/R-388.  I am not entirely sure of this.
      The Hammarlund adaptor is the more sophisticated with means to 
feed AVC to the receiver and a good notch filter.   The AVC in the TMC 
adaptors (MSR series and GSB-1) work strictly on the internal 
circuitry.  That's fine for receivers that do not have external AVC 
connections such as most of the 51J series.  Both use very low frequency 
LC filters to obtain a desirable pass band, i.e., reasonably flat top 
with steep skirts and good ultimate attenuation.   From the published 
graphs I think they are very similar.  Both boxes have their own audio 
frequency amplifiers but have low level outputs to go back to the 
receiver.  I have no experience with either but both companies made high 
quality products.  The Hammarlund adaptors, especially the rack mount 
version seem to be quite rare.  The TMC GSB-1, meant to go with the 
GPR-90 is also rather rare but the various versions of the MSR do show 
up sometimes.

On 5/10/2015 11:12 AM, Rob Atkinson wrote:
> I'm going to assume the IF on the RME ahead of the detector is 455 kc
> which has a lot of options.  Some other IF adds a complication.
>
> For 455 kc I would look for the Hammarlund outboard slicer, the HC-10
>
> http://www.universal-radio.com/catalog/commrxvr/hc10.html
>
> 73
>
> Rob
> K5UJ
>
>

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL