[Elecraft] KX3 - Holding Power Output at Set Value\

[David Hourdequin]

I have a Bioenno 12V 4.5A battery due any day now.  If what you say is true, that should solve the problem.  Alternatively, I need to complete my PowerPole rewiring of my main 30A P/S and then tap into that. 

Thanks so much for the advice.

David


David R. Hourdequin, PE
828-421-6216
drh at dremy.com





> On Dec 7, 2021, at 4:33 PM, Scott Manthe <scott.manthe at gmail.com> wrote:
> 
> Hi David,
> My guess is that the walwart is unregulated or has very optimistic specs. You could also be getting RF back into it. I never power serious radio gear with walwarts, even HTs. There's too much junk out there.
> 
> 73,
> Scott N9AA
> 
> 
> On 12/7/21 4:16 PM, David Hourdequin wrote:
>> I am in the process of getting familiar with my newly acquired KX3 purchased for POTA and am enjoying it immensely.
>> 
>> I am powering it with a 14.8V, high quality, Yamaha walwart - very little internal noise. Settings indicated in the  VFO B display area using DISP are normal.
>> 
>> When I set the PWR level to 10 watts and then key the xmtr, the power immediately drops to 5 watts.  With the key down, I am monitoring the VFO B display which indicates a drop from 14.8V to 10+V and 1+A.  That makes it 10W.  If so, why does the reading when I push in PWR drop to 5W?  Is that ‘input’ power vs ‘output’ power, ie, 50% efficiency?
>> 
>> If that is true, how does one achieve and maintain 10W of output power?
>> 
>> Any help would be most appreciated. Feel free to RSVP here or call if you like - or send me your number and I’ll call you!
>> 
>> Tnx es 73, David, NS4V
>> 
>> David R. Hourdequin, PE
>> 828-421-6216
>> drh at dremy.com
>> 
>> 
>> 
>> 
>> 
> 
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