[Elecraft] 3rd time!

[Don Wilhelm]

Ed,

The most common reason for CAL TPA to change on its own is if it is 
powered when the K2 is below zero degC - the value *should* go negative, 
but it instead goes to a very high number (255).

If that is not the reason, I would look carefully at the KPA100 - 
possibly change Q3 and check the soldering of R5 and R6, then reset the 
bias on the PA transistors.

73,
Don W3FPR

On 5/30/2014 1:13 PM, Eddy via Elecraft wrote:
> Hi Don, this would be the third time I've had to re-calibrate CAL-TPA!!!!! It's been changing on its own......maybe K100 possessed?
>