The Tone switch was wired as a Roger Beep switch, connecting or disconnecting one leg of C146, but whenever the mod was active, you got HF cut on the received audio because the original function was still connected. Odd.
The SWR/Power/Cal switch was wired to short out the AM Power preset (the Red and White/Violet wire in the 'as was' pictures), VR11 and had another unknown function but the Blue and Yellow wires were floating loose inside the case and it will remain a mystery now.
Other mods found? Umm, so far, D8 shorted with a wire link to cure 'lazy' needle. Not sure if this mod will stay or not, it's a minor one that won't affect the operation of the radio much and may actually improve it.
I'm sure there may be other 'mods' to be found, likely just as inept but it's time for sleep now.
More tomorrow if I get time.
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