[Elecraft] (K3) Low output power on 15 meters (new KYSN related ?)

[Vic Rosenthal]

I noted a similar issue and found that increasing the power supply voltage a bit returned full output. I think I have about 14.2v at the rig in receive mode. This was before I updated the synths so I don't think it's related to that.

Vic 4X6GP/K2VCO

> On 9 Jan 2016, at 6:09 PM, Bruce Meier <bemeier at bellsouth.net> wrote:
> 
> Today I noticed that the output power on 15 meters does not reach 100w.  The
> max, according to the front panel meter reading, is 93w.  So, I ran the
> transmitter gain calibration and it did not help. I decreased the power to
> 90w and it reached 90w, so I gradually increased the power and it is fine up
> to 93w.  When set to 94w and above the max output is 93w.  I checked all
> other bands and with the exception of 17 meters they are fine. The same low
> power output occurs on 17 meters.
> 
> I then tried my other K3 going through the exact same testing order and
> received the exact same results. They are both the exact same configuration.
> 
> Specifics:
> 
> - testing into both a dummy load (2 different ones) and 3 different 15 meter
> antennas
> - both K3 rigs are running latest firmware (5.38 / 2.86 / 2.86 / 1.25)
> - The power supply voltage at the rigs is 13.8 and drops to around 13.0 when
> in transmit
> - Reran the Transmitter Gain Calib - no help.
> 
> NOTE: The new KSYN3As were just installed in both rigs including the second
> RX (2 weeks ago)
> 
> Suggestions?
> 
> 73,
> Bruce-N1LN
> 
> 
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