All very technical stuff guys and well above my pay grade but I think I'm just about hanging on in there?
The YouTube link below shows the Kolster-Brandes MR10 (at rear) with my Roberts R303 - both on the MW band but MR10 speaker disconnected.
Some interference heard on the Roberts at one particular spot when the MR10 is tuned through the MW band.
Is this what you mean: -
https://youtu.be/a37mgMNXgT8
While I had YouTube open I thought I'd upload another video which hopefully lets you hear the issues I am having with the Tone Control. This is very bright for most of it's rotation then dull and flat - "dead spot" with excessive hum and crackling. Treated with De-Oxit several times but problem getting progressively worse!
The hum in the "dead spot" is much more pronounced in real life!
https://youtu.be/bzU6QzLeL6A