[Elecraft] KPA 100 fan problem

[Don Wilhelm]

Bob,

If CAL TPA is actually 220, that is much too high - The K2 microprocessor
thinks the heat sink is at 220 degrees C!!
Set it back to match the room temperature in degrees C when the heat sink is
at the ambient temperature. (i.e. 22 rather than 220).

73,
Don W3FPR

> -----Original Message-----
>
> Yesterday I turned on and the fan came on even though the heatsink was
> cold and when I tried to TX 'PA hot' came on and the PA was inhibited.
>
> 1. CAL tpa is 220 which is about right  ~ 22C and Fan menu set  nor.
> 2. On  TX - Q3 base is 0.6v - which I think is about right (RC4 going
> high of course)
> 3. On U1 RC7 is 5 and RC6 is low which is the correct output for Fan Hi
> - which is what it is doing.
> 4. Power control less than 10w and the K2 sends OK
> 5. Firmware PA 1.06
>
> Any ideas?
>
> 73 Bob G3PJT
>