[Wendymott]

How strange !!!!! I was thinking of posting the identical "mostly" post by Ian.
I have.. somehow..got 4 X FRG 7's in my workshop, that I agreed to look at, as part of buying one for myself.
They all have issues, but mainly the noise increase as you increase the RF level from say 2 uV, again at say... 10 Mhz, as a reference.
I concluded that. either.. as they are 40 years old ish..... it is a common degradation, possibly , alignment...... or. Thats how they are...
I have not had use of these "Wardley loop" types before...so I didnt know what to expect, but as they are all the same, I guess the replies from David and Steve fairly cover it.
Incidentally, one of my ceiling lights (Led) causes RFI, so that was one source. Fortunately the Main Led light is RF quiet, the smaller one is for "boost" if I am tired.
Going back to receivers...is it pointless having a receiver look at < 2uV.. as the background noise... at mine.. is S7, anyway.