[Elecraft] Elecraft Digest, Vol 239, Issue 12

[Bob McGraw]

Did the fault occur immediately after a band change?  I occasionally see 
a slight  power overshoot from my K3S on the first transmission after a 
band change.    Perhaps a transmit gain calibration is in order.   I use 
the K3 Utility for this purpose and a known good 50 ohm dummy load.   
The radio will do the rest.

73

Bob, K4TAX




On 3/30/2024 7:37 PM, elecraft-request at mailman.qth.net wrote:
> Message: 7
> Date: Wed, 27 Mar 2024 10:18:59 -0400
> From: Pete Smith N4ZR<pete.n4zr at gmail.com>
> To:KPA1500 at groups.io, Elecraft Support<support at elecraft.com>,
> 	Elecraft List<elecraft at mailman.qth.net>
> Subject: [Elecraft] Erratic KPA-1500 behavior
> Message-ID:<c5595b89-4307-4f05-8271-9c572aa1f71b at gmail.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> This morning, starting the CWT,? every few transmissions my amp was
> faulting with the indication of excessive driving power (~67 watts vs 33
> watts normally).? Each time, it would fault once, then operate normally
> for a dozen or so transmissions before the next fault. Then, about 10
> minutes into the hour, the faults stopped happening.? The K-3 showed 33
> watts throughout
>
> I checked the KPA-1500 log, and all it shows is the "power input"
> fault.? What could be causing this erroneous indication of excessive
> drive?? A sticky relay?
>
> -- 73, Pete N4ZR
-- 
"You only grow old when you run out of new things to do"