[Elecraft] [K2] KAT100 odd behavior cured by reset of KPA100?

[Don Wilhelm]

Bill,

I guess I was not clear - if the KPA100 firmware is recognized by the 
base K2, then the K2 will try to use the KPA100 wattmeter (not the one 
in the KAT100).

However, it will fail because the EL5146 has been removed - that causes 
the K2 MCU to think there is no power output, when in fact it is 
transmitting at its maximum output.  It will not be long before 
something more is damaged if that condition is continued.  Shut it down 
until you can get q replacement EL5146.

Your other option is to remove the KPA100 and operate with the base K2 
and the KAT100 - that combination will work.

73,
Don W3FPR

On 8/16/2012 11:37 AM, Bill Coleman wrote:
>
> OK, so if the KPA100 has U6 removed, but a KAT100 is attached, then the system will use the EL5146C in the KAT100, and disable that in the KPA100, correct? But, this circuit is only used while transmitting, not while receiving, correct?
>
> Still doesn't explain the weird turn-on behavior, or the "not inst" messages that were cured by turning the KPA100 Off and later back on in the PA menu. Because there is no transmission involved at all. Just turning the unit on, using the power knob, Ant1/2 button, and looking at the ATU menu.
>
>