Walter.
While I suspect that voltage requirements for the KX3 are similar to those of
the KX2, its a KX2 as the device in question.
And I agree with Don. The underlying issue here is why is the power supply
voltage so low? The KX2 (or KX3) shouldn’t draw more than around three Amps
under
Tommy,
That is too much voltage drop. Check all your power connections to be
sure they are tight. If the power supply terminals rotate even a little
bit, open the power supply and tighten the terminals securely.
Since the KX2 power control tries to maintain the set power, if the
voltage
Based on the KX3 specifications, it is designed to run at lower power for
full-carrier modes.
From the transmitter specifications on page 54 of the KX3 Owner’s Manual:
"5 W or less recommended for high-duty-cycle modes (FM, AM, DATA). Power will
automatically be reduced if PA temperature or
Based on a presentation by Eric at the West Valley Amateur Radio
Association, Elecraft tends to build their equipment to run at
full advertised power with digital modes. Their model is a RTTY
contester calling CQ with 60% to 70% of the time transmitting.
He indicated that the KPA1500 would run
Don't Elecraft recommend using lower power for high duty digital modes?
(Though FT8 us 15s bursts so not as high duty as some).
- Richard
On Mon, 18 Mar 2019 at 18:46, Tommy wrote:
>Ahhh, O.K., with my 13.2v Astron it's showing 10.3 - 10.8. I guess
> for now with this power supply I'll
Ahhh, O.K., with my 13.2v Astron it's showing 10.3 - 10.8. I guess
for now with this power supply I'll have to settle for 5 watts. Thank
you for the quick reply.
Tom - KB2SMS
On 3/18/19 2:36 PM, Walter Underwood wrote:
Set the display to show the power supply voltage and watch it while
Set the display to show the power supply voltage and watch it while you
transmit. The transmitter requires a voltage over 11 V for more than 5 W.
If the voltage is dropping below 11 V, that is the problem.
This in the specifications section of the KX3 manual.
wunder
K6WRU
Walter Underwood
Hi folks,
I'm running FT8 with a KX2 powered by a power supply. The rig
keeps folding back from 10-12 watts to 5 every time and it's barely even
warm. I'll set it to 12W for instance, it'll transmit fine at that
level but when done cut back to 5w. I don't transmit often enough for it
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