[Premium-Rx] R-390A SSB Converter - Mixer - DSP

[Rodney Bunt]

Geoff,

You could use a mixer to get a 12kHz IF out to your PC sound card and use any number of Software
decoders, you can get SSB or ECAM detection, RTTY, etc. etc. etc.

Have alook at this page

http://home.t-online.de/home/sat-service/sat/DRM/DRM.htm

see the Universal DRM- miniature mixer unit (surface mount) one page down.

It is aimed at DRM (Digital Radio) but you need a "WIDE IF" maybe you could get by with the IF
bandwidth on 8kHz for DRM. Anyway the mixers are SMALL, some crystal locked, or you can get the
tunable ones, for those whose IF is aligned to the XTL filter etc....

Here is a site for realy cool decoding software, http://www.cam.org/~noelbou/RxPlus/index.php

It supports RTTY, PSK31, HF-FAX and SSTV as well as ECAM and SSB, it has some clever noise
reduction processing that realy cleans up SW BC listening, there are some Demo Audio files for
listening to the effects, turned on and off etc. You don't have to yuse the Radio remote control
component just the audio processing part.

Regards,

Rodney
VK2KTZ
 



--- Geoff Fors <wb6nvh at mbay.net> wrote:

> Well, R-390 stuff is off topic but begs for further details...
> 
> The Central Electronics Slicer works well but has no audio stage and must be tacked in to the
> host receiver's audio system.  This is somewhat of a nuisance on many receivers but not hard on
> the 390 and 390A.  The Slicer works on other IF's too, such as 500 KHz in the 51J-4, but if I
> remember correctly, I had to use the accessory broadband mixer to do that.
> 
> The Hammarlund adapters are essentially the power supply and IF strip out of an HQ-170 or 180.
> In some cases, I have seen them sell for more than the whole receiver, which answers the riddle
> of "when is half a receiver worth more than a whole one ? "
> 
> One of the nicer SSB adapters is the smaller Technical Materiel Corporation unit, but those have
> become quite scarce in recent years.
> 
> I admit to once taking the remains of an SSB CB radio and running the 455 KHz IF signal out of
> the R-390A into the CB radio's IF stage and using that as the adapter. 
> 
> And as Monty Python's Flying Circus would say, "Now for something completely different:"  An
> SX-88 recently went for $ 8,000 on the e-place, which is less than one went for last year.  You
> could buy two Harris 590A's and some Racal gear for dessert at that price level.  Premium
> receivers are becoming a bargain !
> 
> 
> Geoff Fors
> WB6NVH> _______________________________________________
> 
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