[R-390] Cathode Resistors in 1st and 2nd Oscillators in R-390/URR

[Barry Scott]

I mentioned that the screen/plate resistors in my R-390/URR are a bit
high.  Today, I removed the oscillator deck and measured those.  The
68k is about 71k so not too bad.  The 82k is at 87k so a bit worse but
I'm still not sure how much that affects the performance.

What I did find is the 150-ohm cathode resistors are both at 190 ohms.
I presume that may be the primary cause of the low output for both of
the oscillators.  The 2nd mixer has a bit lower voltage at the test
point than does the 1st mixer so that 82k may still need to be
replaced although it is still in tolerance.

Thanks,
Barry - N4BUQ