In a message dated 02/12/04 10:30:24 GMT Standard Time,
[hidden email] writes:
Symptom:- Received audio sounding scratchy, suspected loudspeaker.
Problem:- Bad contact. The plating (Tin ?) had worn through on loudspeaker
connector female crimp pins.
Had a similar problem with the company's 1979 vintage GE Mastr II truck
radios used in an area with no roads. The continuous vibration caused the board
connector pins from the front panel to the RF/IF/audio board to go intermittent
for exactly the same reason, loss of tin coating on the plugs. The solution
apart from replacing the interboard connectors was to apply an extremely thin
coating of lubricant to the pins. This seemed to have a lasting effect on
the problem. Just a small smear of WD40 worked wonders. The socket must have
been acting as an effective abrasive mechanism on the pin.
Totally unnecessary if the contact remains undisturbed with normal operating
conditions, but essential in our case.
Bob, G3VVT
ex desert rodent
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