[Wendymott]

I have more observations to add, with the FRG 7 in mind. I decided to go through the re alignment "hoops" as per the manual, with what I thought was the best sample,
I then made a sensitivity run at 1 Mhz intervals noting all the settings.

I then tested one of the particularly noisy receivers, the results were very disappointing , both in sensitivity and noise.
So sample 3 was tested, again poor sensitivity and noise, however I conducted a re alignment. I found the 52.5 Mhz strip was considerably mis aligned, possibly due to component ageing, but who knows. Once re aligned the sample was nearly as good as the First sample, less noise, better sensitivity.... etc.
I was fortunate to have not just one but four receivers for comparison, and I think I am winning this one.