Mike,
Check the power control 5 watts requested. If you actually get more
than 10 watts output then either the diodes (I understand you replaced
them) or KPA100 U6 may be the cause - there are a few other
possibilities too.
During a TUNE, you should have voltage into U6 pin 3, and approximately
twice that voltage at U6 pin 7.
If no output at U6 pin 7, check U6 pin 8. If it is not 5 volts, then
you have a firmware problem.
73,
Don W3FPR
On 1/3/2014 8:21 AM, Mike Sanders wrote:
Sorry that should have been D16 and 17. I'm going to look at the
circuit again and again. 73
K0AZ
Mike Sanders
EM37cd SW Missouri
www.k0az.com
-----Original Message-----
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike Sanders
Sent: Friday, January 03, 2014 7:13 AM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] K2/100 7211 TX Power output meter stopped working
Good Morning, Yeah, not sure what happened but appears when in
high power mode over 10 watts power control does not work either.
It gives full output. I just replaced diodes D1 and D2 1N5711s but
the problem continues the same. Before I get any deeper into this does
anyone have any experience with this failure and any ideas? I sure
thought the diodes would fix this. I triple checked my work and the
orientation of the diodes on the board. 73, Mike K0AZ
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