Jeremy,
Do I recall correctly that you had a good PLL range? If so, I have
trouble believing there would be 300k resistance from CB U6 pin 24 to RF
U7 pin 2 while you have zero ohms to U4 pin 5. Are you certain you
counted the pins correctly? Pin 1 has a circular solder pad and the
rest are rectangular.
If you want to check the operation of RF board U7, monitor the DC
voltage at pin 7 while rotating the VFO knob - the voltage should change
gradually while tuning through a 10 kHz range and then jump back to its
lowest (or highest depending on which way you rotate the knob) at the
end of each 10 kHz interval.
Did you remove the Control Board when you made the measurement on the
collector of Q1? If not, then somewhere in the vicinity of 5 k is not
unreasonable.
73,
Don W3FPR
On 2/3/2013 12:41 PM, JeremyJones wrote:
Looking over the board I did find that I had U8 C45 connected to pin7 instead
of pin6. That has been corrected.
U6 pin 24 to U4 pin5 is less than 1 ohm, however U6 pin24 to U7 pin2 is 300k
ohm. I don't see any damage on the board.
I also noticed going back to the beginning for the resistance checks on the
control board that Q1 collector should be great than 1M, but is reading 5k.
--
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