[Premium-Rx] RA1792 Options

[George Georgevits]

Hi Dan,

Many thanks!

OK so if I read this code correctly, I have the normal 6 filter set (as you
have stated), and I have verified that these are indeed fitted.

I should have the S2 frequency standard (S2 = 9442 ST80764), and I have
found this in there, made by Racal Dana.

I should also have the Integral sideband board and converter kit, the SCORE
interface kit, a 1Hz steps with list search, and an AC power supply. I have
the AC power supply.

There is also an A1 RF AMP/LPF, and a box labelled 51-3002 on the side and
51-3001 by hand on the top.

Along the side, it has what I assume to be the processor card because it has
three ROM chips and a battery on it. The battery reads 2.8V so appears OK.
The handwriting on the ROM chips has faded, but I think one says 83056/2/A
Issue 1 8244.

>From the underside, I see an A2 1st Mixer, an A7 1st LO, a 2nd Mixer and an
A8 2nd LO.

On the rear, it states DRG No. ST 80730, which I presume means I have the
"A" version.

On the rear, it appears to be fitted with J2 main IF output (presumably for
the 100KHz ISB option, a J7 LO output and a J1 REF IN/OUT.

Most importantly, it has the GPIB interface. I have quite a good collection
of HP ISA GPIB cards and have written a lot of software to drive vector
network analysers and other HP test equipment from a PC. I was hoping to
write something to control this RX.

Cosmetically, it looks quite good.

I tried firing it up - dead as a doornail. Checked the fuse - OK. So I guess
the power supply is first on the list.

Any thoughts, comments, advice would be most appreciated.

Cheers,
George G
VK2KGG

> -----Original Message-----
> From: Dan Rae [mailto:danrae at verizon.net]
> Sent: Sunday, 16 October 2011 12:42 PM
> To: George Georgevits
> Subject: Re: [Premium-Rx] RA1792 Options
>
>
> On 10/15/2011 6:16 PM, George Georgevits wrote:
> > Hi Group,
> >
> > I have an RA1792 which is awaiting repair. Before I start, I
> would like to
> > know exactly what it is I have. On the back, it has a plate which says
> > OPTION GB /S2/1/S/1/A. Despite scouring the Net I have been
> unable to find
> > any info on this. Can someone please enlighten me?
> >
> > Cheers
> > George G
> > VK2KGG
> > _
> >
> George, I have attached a couple of pages of Word file with some
> details.  GB is the "normal" six filter set.
>
> OK I have added the filter set details to the file as well.
>
>
> What you have of course may be different to what is on the option plate.
>
> There are several hundred different firmware sets that can be fitted, 2
> and 3 eprom versions depending on the mark and many other things.
>
> Let me know if there is anything else you need that I may have.
>
> 73
>
> Dan
>
> ac6ao / g3ncr
>