I did do the sweeps with a dummy load on all bands and the USB graphs look fine albeit that the LSB graphs don't look as low as possibly they should do, so maybe the unwanted sideband rejection isn't what it should be? (I don't know what affects this).
The 5v regulator gets hot enough that you can't keep your finger on it, but I can't work out what is causing it, IC3 and IC4 get slightly warm and I'm worried that one of these may be faulty.
I think I am going to rewind the trifilar transformer and L12 and see if that makes any difference. Meanwhile, if anyone else has any ideas...

73's

Dave.
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David Thomas M0OOR