Re: Low power out, ERR TXG when trying to calibrate power
Posted by
Don Wilhelm on
Apr 18, 2017; 12:04pm
URL: http://elecraft.85.s1.nabble.com/Low-power-out-ERR-TXG-when-trying-to-calibrate-power-tp7629471p7629474.html
Rob,
I would try running the TX Gain Calibration with a higher voltage power
source - at least 13.8 volts.
If it still fails, contact Elecraft support.
73,
Don W3FPR
On 4/18/2017 5:55 AM, M0VFC wrote:
> Hi folks,
>
> My KX3 seems to have developed a low output power problem.
>
> All used to be fine, but over the weekend I noticed it now only gives ~6W
> maximum on CW despite a good SWR indication. I have reproduced this into a
> dummy load (1.1:1 SWR) and checked DC input voltage (11.2V key down,
> external 3S LiPo).
>
> Additionally, if I engage the ATU, it no longer seems able to find a good
> match, even into a dummy load. Bypassing the ATU results in an indicated
> 1.1:1 SWR, and removing the ATU module does not fix the low output power
> problem.
>
> If I run the manual TX power calibration (set power to 6W and hold TUNE),
> the VFO B display reaches about 5.4W then stays there. Tapping TX to stop
> the procedure results in ERR TXG being shown. Doing the same at 4W results
> in maximum output power of about 3.2W, from memory, and a similar ERR TXG
> error.
>
> This is true on all HF bands.
>
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