[Elecraft] KAT500 question...

[Don Wilhelm]

Dave,

Are you running with the KAT500 in MAN or TUN?
After you have trained the KAT500 to the antenna (see the manual for the 
bin sizes for each band), you should switch it to MANual.  That will 
keep it from trying to TUNe when you first transmit.

73,
Don W3FPR

On 11/18/2020 2:56 PM, Dave Cole wrote:
> Hi,
> 
> I have a quick question regarding operation of my KAT500 tuner.  I have 
> a K3 feeding a KPA500, feeding the KAT500, feeding a 6BTV vertical which 
> is tuned up well, and can run with the tuner in bypass, and keep SWR 
> below 1.7:1 on all bands...
> 
> If I am using the KAT500 as a tuner, and I watch the SWR indicator on 
> the KAT500, for an instant, at key-down, I see greater than 3:1 SWR, 
> then it drops to normal, all in within a few milliseconds, to 
> microseconds.  Every so often this will fault the amp.
> 
> If I put the tuner in bypass everything is normal...  No issues, the SWR 
> indicator operates as normal, the amp never faults...
> 
> Anyone have a guess as to what is happening?