Hi Bruce, thanks for the good info. Yup, I had a few fellows send me a
reference to the old "Kenwood East" website and noted that the pots are now
discontinued and out of stock. Darn.
I have one TR-751 that has a broken RF/SQL pot. Opening up the unit and
ohming out the pot showed that it had failed electrically open end-to-end.
This failure mode results in reduced sensitivity and high squelch, so it
needed to be fixed. Since I use this rig as an IF rig for the uW, since I
seldom use the control, I decided to simply cut the wires and replace it
with a fixed resistor of the same value. That got the radio operational
again, albeit with no RF gain & squelch control.
My second TR-751 has a scratchy volume pot, and I am concerned that it may
be failing. Let me know if you are ever able to get your "scratchy pot:"
fixed as I would be interested in what you did. If it does fail on me
sometime, my thoughts would be to replace the volume function with a (near)
equivalent pot and to add a separate on/off switch .... not too big of a
Both radios are used for uW duty where they are excellent. I did defeat
the HI/LO power switch so that its always in LO power mode by cutting the
control wire that runs to the HI/LO button on the front panel. When this
line floats, the radio is in LO power, grounding the line via the HI/LO
switch cause it to go into high power mode. This helps to assure that I
don't accidentally go into HI power mode.
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