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

[Scott Manthe]

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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