[Elecraft] KX3 power reverts from 10W back to 5W

[Ralf Wilhelm]

Hi Arno,

If your fully charged batt reads 11.4 V AFTER the KX3 has switched back to 5 W, the voltage reading with 10 W (maybe 50% more current?) will most probably be below 11 V. 

I would suggest that you try to gradually increase the output power from 5 Watts and read the voltage and currents from the KX3s meters. This way you will have a measure for the voltage drop and the series resistance in your battery connection and power leads.

Greetings 

Ralf

DL6OAP


Am 30.08.2013 um 19:50 schrieb "Arno Dienhart" <ad at broadweave.net>:

> I would like to come back to this topic with an update after still
> experiencing the same issue.
> 
> 
> 
> I now use my ZS6BKW with a 1:1 current balun between the twin line and the
> coax. I have tried a 70' and a 30' length of coax to the rig. If you think
> it will solve the problem, I might even try a 5' length and smolder in the
> sun!
> 
> My battery shows 11.4 V during transmit on the KX3's PS meter.
> 
> SWRs are never higher than 1.3:1 after tuning.
> 
> PA temperatures are never very high (sitting in the shade).
> 
> 
> 
> I have tried lower W settings, like 8W, which, on some bands, hold for a
> while. On other bands, they too revert back to 5W. 
> 
> 
> 
> So, if this is all normal, I don't understand why the KX3 is rated at 10W.
> Or asking in a different way: what needs to be present to keep the
> transmitter from reverting down from 10W, and how can I achieve that state
> with my setup?
> 
> 
> 
> Please keep in mind that I don't have any antenna analyzing instruments
> other than what the KX3 provides.
> 
> 
> 
> Thank you and 73,
> 
> Arno K7RNO
> 
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