[Elecraft] KX3 power out

[Brian Hunt]

What is the key-down voltage seen on the KX3 display?  Measure the regulated voltage at the PS under the same conditions. Is it OK?  I had power control problems on my K3 until I solved the sagging voltage problem. GL & 73, K0DTJ

> On Jul 11, 2020, at 12:42, Frank O'Donnell <vfo77 at inkbox.net> wrote:
> 
> Always something else I remember just after hitting send.
> 
> The KX3 is running off the Pro Audio Engineering PAE-Kx33 power supply, plugged into the 9-15 vdc connector.
> 
>> On 7/11/20 12:40 PM, Frank O'Donnell wrote:
>> After a fair time of non-use, today I got out my KX3 and started working through configuration checklists. Among other things I thought I'd check the power out.
>> 
>> For this test I used a Bird 43 and MFJ-260C dummy load. For HF I used a Bird 2-30 MHz 25w element, and for 2m a 100-250 MHz 10w element. I put the KX3 in CW mode and keyed with the KXPD3 paddle. When changing to each HF band I hit the ATU Tune button.
>> 
>> On 40m and 20m I found that with the Pwr knob set to 15w, the Bird showed about 8w out. With the Pwr knob set to 5w, the power out is about 3w.
>> 
>> After changing the antenna port and Bird element, on 2m with the radio set to 3w the Bird shows about 2.5w out.
>> 
>> Any thoughts on these results, or suggestions on other things to check?
>> 
>> Thanks and 73,
>> 
>> Frank K6FOD
> 
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