[Elecraft] KAT100 HELP NEEDED

[W3FPR]

Eric,

What DOES happen?  Do the ANT1 and ANT2 lights illuminate and change 
when you press the K2 ANT switch?
Are there any lights in the SWR LEDs when you attempt a TUNE?

If the answer is no to either of those questions,, dig out your DMM and 
take the top cover off the KAT100.
Measure the 2 outer pins of regulator U8 - the input pin should be near 
12 volts while the OUT pin should be near 5 volts.

Is the socketed firmware IC properly seated (use anti-static measures 
when checking).

Check the manual for the control cable pinout and make an end to end 
continuity check to make sure the cable was not damaged during shipment.

That is a good start on getting a handle on the problem.  Let us know 
the results of your tests.

73,
Don W3FPR

On 7/22/2024 3:39 PM, eric norris via Elecraft wrote:
> Hi Gang,
> I have a new-to-me KAT100 I'm trying to get working.  It is connected to the same PS as the K2/100.  K2 PORT is ON.  Known good PS cable.  KAT100 appears dead, K2/100 ATU menu setting will not change.  Control cable from previous owner who says it was working.
> What am I missing?
> Thanks and
>
>