My own RA1792 was left over from an propagation experiment that Racal started (I think) in the mid 1980s. To cut a long story short, it and the accompanying 1723 drive unit were ‘stored’ in an environment which exposed them to extremes of temperature … cold in the winter and hot in the summer. This ultimately destroyed the LCD displays in both cases. So when I ‘inherited’ the kit, both were in a sorry state. The 1792 performed well as a receiver but I could never get the 1723 to do anything, so I parted company with it some time ago.
The issue with the ‘bleeding’ displays was resolved by replacing the entire front
panel assembly and the PSU was modified to support the back-
Last week I finished re-
Then I thought “what if the fault is on the other side of the mains transformer?”.
I had joked a few times that it might be a dirty mains switch! I dug out a scrap
1792 front panel complete with switch and mains cable. It was filthy! After cleaning
it up, I substituted the switch and cable assembly for my own one and switched on.
BINGO! No flickering back-
Although I have other receivers including an RA1772 and an RA3701 to name two, I do like the RA1792. Its 16KHz roofing filter offers the widest IF bandwidth in my collection, giving superb AM reception quality when used with an external speaker. The 1Hz tuning resolution is super smooth and switching modes and bandwidths is a breeze.
One thing that does let the type down though is the paintwork. Yes, there are lots of RA17s out there with tattered looking front panels, but some of these are pushing 60 years old! The 1792 has only been around half that time.The problem appears to be a lack of primer. I have a bunch of front panels where the grey paint is coming off in large flakes; notably where labels or stickers had been placed. Where the paint has come off there is bare metal exposed … no primer!!