[Elecraft] TX Gain Calibration Fails on 6 meters

[hawley, charles j jr]

I had the 50 MHz gain cal fail with the initial build of my K3s. Don't remember which power. I repeated the cal several times and one time it passed. I left it there. Not anxious to try it again.

Chuck Hawley
 c-hawley at illinois.edu

 Amateur Radio, KE9UW
 aka Jack, BMW Motorcycles

________________________________
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> on behalf of Frank via Elecraft <elecraft at mailman.qth.net>
Sent: Wednesday, March 13, 2019 12:04 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] TX Gain Calibration Fails on 6 meters

I purchased Elecraft K3S S/N 11672 in August 2018.  The build was completed in November 2018.  At that time all the tests and calibrations were completed successfully.

Now the TX Gain Calibration fails on Low Power and High Power on 50 MHz. only.

Page 67 of Elecraft K3S owners manual TXGN Description states LP 0-12W and
HP 13-120W.

On 160-10 meters I hear the relay switch from LP to HP amplifier when the power adjustment is increased from 12 to 13W as described.

On 6 meters the relay switches from LP to HP amplifier when the power is adjusted from 8 to 9W.

The error message states “TX Calibration failed because Transmit Power did not reach the expected value.”

The TX calibration is performed per the instructions into a proper 50 ohm dummy load.

I submitted this to Elecraft Support last week but have not received a response, so I thought I would ask the group for ideas.

Thanks in advance.

Frank
K6FW
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