John,

When I use my KXPA100 with my KX2, I normally leave the physical switch on the KXPA100 in the 'off' position, as using the cable from the KX2 overrides it when the PA Mode is set to 'ON' in the KX2 menu.

In the past, when I've had an issue with the PA Mode turning off spontaneously, I found it due to either the cable not being plugged in properly, or something hung up in the KX2, which was solved by turning it off and back again.

Hope that helps,

73,

-- Dave, N8SBE, Hamshack Hotline 550-0971, HamsOverIP 101018, AmateurWire 1348

On 2025-01-24 20:43, John Overbaugh wrote:
I have a KX3 and the KXPA100 with the KXPA to KX3 Connector Cable. I have been radio "inactive" for several months and noted recently the KXPA100's power switch was set to on. For quite some time, I kept hearing a recurring tick and only realized a week ago that the KXPA100 was turning on and off
every so many seconds.

Fast forward to this evening and I'm setting back up because, like the
procrastinator I am, I'm participating in Winter Field Day tomorrow (from home, long story). I better get ready, right? I connected the KX3 and the
KXPA100, did all the things, powered on the KX3 and switched PA Mode to
"On" and exited the menu. A few seconds later, it switched out of PA mode.
Back and forth I played that game 4-5 times and then stepped back...

- The 2.5mm tipped cable was pinched in between a case and its cover,
   but doesn't appear to be broken.
- I checked the pinouts based on the Cady book and I have continuity in
   all lines
   - I connected the KXPA100 via USB serial cable and launched the KXPA
utility. There are a number of fault codes, but none that appear when this
   switches off
   - No fault code appears on the "Operate" tab either
   - It just... switches off

Am I overlooking something obvious? It's been 100% reliable for me for a
good 5 years now, so I'm really unclear what could be happening.

Thanks in advance,
John O.
K7JTO
Layton, UT
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