[R-390] no receive below 8mc

[Chuck Collins]

Yes, this did work below 8mc. It was never moved and one day I turned it 
on and there was nothing below 8.
That was 10 years ago and it still works good above 8.
Going to check connections for SW 208 where it sends the signal to the 
second mixer.
It had a bad cap across T-207....no that's not it!
It had a bad 1st osc tube and plate loading resistor.....no that didn't 
help either!
How about the dropped tuning slug on one of the three tuned circuits? 
No...that didn't do it either.
It had a disconnected wire to the 1st mixer....nope not yet!
I did get 17 mhz into the mixer finally.
I am going to find this out one way or another.