[Elecraft] K2 Scratchy received audio

[G3VVT at aol.com]

In a message dated 02/12/04 10:30:24 GMT Standard Time,  
stewart at baker.nildram.co.uk 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