LS,
The most common problem with the thermistor board is a solder bridge on
that board.
One quick check is the voltage at U6 pin 5 which should be 1/2 of the 8
volt supply.
Another check is to see if the voltage at U6 pin 1 is twice the voltage
at pin 3. Those voltages will change as the VFO is changed over a 10kHz
range, so check with several positions of the VFO.
73,
Don W3FPR
On 4/1/2016 10:41 AM, lstavenhagen wrote:
Hi all,
Is there a procedure where I could check the K2 thermistor board for proper
operation once soldered in? I just passed that step in my second K2 build,
and I'm uncertain about one of the pins - it rocked out of place while I was
soldering it to the RF board, but of course it's now soldered in. It's not
just in there but it's IN THERE hi hi and I'd like to check it before
tearing it up trying to pull it out of the board.
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