[Elecraft] variable audio output on one year old K2

[Don Wilhelm]

John,

480 ma is just about double the normal receive current.  You do have 
something wrong there.

You will just have to hunt for it, but remember that most everything in 
the K2 runs cool to only slightly warm during receive - you may be able 
to find out what is getting hot by examining for 'hot spots' with your 
fingers.  If you do find a hot area, we can help you localize the problem.

One place to start is to find out whether the 8T and 8R voltage rails 
are behaving - check the collectors of Control Board Q1 (8T) and Q2 
(8R).  The 8T voltage rail should be zero during receive and the 8R rail 
should be at 8 volts (+/- 10%).

73,
Don W3FPR

John Wiener wrote:
>  My K2  5312 has some audio fluctuation.  It tends to seem a little soft 
> on audio then normalizes after a few minutes.
> On receive, current is 0.48 which I read as 480mA.  I think this is too 
> high. Am I correct?
> Also, the LCD does not light up as an S-meter but does light up during 
> transmission.
> 
> I am able to use the K2 and have many QSOs in this condition.  The 
> transmitter seems not to be affected.
> 
> Do I really have a problem?
> 
> I will first re=do the S-meter calibration tonight but just wanted to 
> get pointed in the right direction.
> 
> Thanks!
> 
> John
> AB8O
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