[Premium-Rx] R-390A SSB Converter

[Geoff Fors]

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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