Hi Chet;
You should be able to run the TX gain cals with no errors, otherwise
something is wrong.
NOTE; After a successful Gain-Cal, then never, ever, TX at exactly 5 or
50watts (or 1.0MW) as that can cause an inadvertent TX gain cal and mess
it up.
To me, it would appear the LPA is weak.
Check your Watt-Meter Cal, or make sure your WM LP is around 65-100 and
WM HP is 25-55 typically.
Then if you can get the gain cals to run, send me the numbers, IE click
Display TX Gain Summary and cut and paste.
*However, I just noticed you mentioned the MW gain cal has issues, so it
could be before the LPA/KPA and would be the Band Pass Filter adjustable
caps.
Also from my notes;
Slow ramp up of power, mainly on the upper bands, can be D1 E560040
burnt (or bad solder joint) and/or bad Q6 E580026 on LPA. (power ramps
up starting very low). If Q6 shorts, it can take out Q3 E580030.
**REPLACE D1 *and* Q6 if the solder joint is bad!!!
Fix; Replace ALL THREE at same time! Q3, Q6 & D1 on LPA.
Note; This can also just be normal operation of Firm Ware overshoot
protection. (power goes quickly to near (~80%) desired power, then ramps
up the final percentage in seconds. This happens if you; 1. Change
desired power, 2. Change bands, 3. Power cycle radio.
So, set desired power, then long press XMIT to do a TUNE (with TUN PWR
at nor), or Key up on FM (if you have a FM filter). The go back to your
desired mode and it should reach good power quickly.
Keith WE6R Elecraft K3/K4 Tech.
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