Re: [Elecraft] Fault on KPA500 after 300w

Good news! I swapped out the 1ft jumper for a 20ft jumper and moved the balun problem solved! Thanks all for you help! On Mon, Mar 12, 2018 at 7:19 AM, Alan Lambert wrote: > I recently acquired a KP500/KAT500 for use with my Kx3/KXPa100. I know > the person I bought

Re: [Elecraft] Fault on KPA500 after 300w

I have experienced the exact same issue, and I posted about it here. In my case, it was being caused by my MFJ remote auto tuner. I had also suspected an Alpha Delta surge suppressor that was outside the shack prior to cable entry, and I had removed that. The MFJ had a relay clicking on every

Re: [Elecraft] Fault on KPA500 after 300w

I had a similar problem but only on 160m. would work fine for a few minutes at full power, fine at reduced power. After much hair tearing discovered that it was a voltage transformer in an external coupler heating up and losing inductance, effectively shorting the feeder. Cured by using a larger

[Elecraft] Fault on KPA500 after 300w

A dummy load may verify that the KPA/KAT are working properly. I am guessing that something is arcing in your antenna system. Perhaps water ingress. Have you run high power into it with a different amp? John KK9A On March 12 Alan Lambert wrote: I recently acquired a KP500/KAT500 for use with

[Elecraft] Fault on KPA500 after 300w

I recently acquired a KP500/KAT500 for use with my Kx3/KXPa100. I know the person I bought it from well and I am 99.% sure it is not an issue with the amp or tuner. I was making some notes (a chart) for input to output power levels, mostly just to ‘get to know’ the amp a little better. At