[Elecraft] Lost power on K1

[Phil Wheeler]

Harvey,

I take this to mean that you have low power on ALL bands, not just one. 
 In that case, I would first remove the KAT1 and install the jumper 
across its jack on the KFL1-4 board.

See if you have power out in that configuration (i.e., is it a KAT1 
problem?).

If the problem is only one band, I'd try a realignment (remember there 
is a resistor to be reconnected first) -- and, if the trimmer bodies are 
not blue, replace the trimmers if alignment fixes the problem.

Beyond that, it would be good to check all resistances and voltages -- 
especially in the TX stages.

73, Phil


Harvey Dapeer wrote:

>My 4 band w/ATU K1 (SN 432) has never given me any 
>problems until just now.  Set it for 5 W and confirmed the 
>output by  the ATU/OUT reading and an external watt meter.  
>Finished a QSO and went to lower the power level when I 
>discovered that the actual power out now, again shown on 
>the ATU/OUT and watt meter was only .5 (half) watt.  
>Switched to ATU TUN and when attempting to retune got a 
>PLO indicating that the power out was indeed very low.  Also 
>I am now getting only one lit bar on the display during 
>transmitt.  A blown PA transistor?  Any suggestions from the 
>group will be appreciated before I tear into it to see what 
>happened.  
>
>Harvey, K5DDJ
>
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