Ken,
Now that I see some numbers and know that you are running into a dummy
load, it would appear that you have a low pass filter problem on 20 meters.
I suggest you contact K3support. A common cause of HiCurrent is a
problem in one of the Low Pass Filters. Support may be able to lead you
through determination if that is really the problem and if so, is it in
the low power 20 meter LPF or in the KPA3 LPF.
73,
Don W3FPR
On 12/15/2014 3:57 PM, Ken wrote:
Mike,
It’s not “voltage starved.” I just went through and documented everything.
Voltage measured by the K3 never gets below 13.1 volts. The problem is ONLY on
20m where “high current” displays at 65 watts. And indeed it is comparatively
high current, 23.5 amps. On the other bands I can run 100w without the
current getting that high.
ALL TESTS DONE WITH A DUMMY LOAD (or a live antenna and the internal antenna
tuner or an external antenna tuner.)
I wonder if the other people experiencing the high current message are seeing
it on other bands, or only 20m.
Ken WA8JXM
On Dec 15, 2014, at 12:20 PM, Mike Harris <mike.har...@horizon.co.fk> wrote:
It isn't, however, the load on the PA is band selective depending upon the
antenna match and this can effect the current. 12.1v is forcing the PA to draw
more current to deliver the power requested. Any particular reason you are
running voltage starved?
Regards,
Mike VP8NO
On 15/12/2014 14:03, Ken wrote:
In my case, the K3’s internal volt meter is indicating 12.1v, well above the
minimum specs. I am pretty sure this only happens on 20m, never on other
bands. I wouldn’t think supply voltage would be band selective. I’m using
the power cable that came with the K3.
Ken WA8JXM
On Dec 15, 2014, at 11:11 AM, Don Wilhelm <w3...@embarqmail.com> wrote:
Matt is entirely correct. The first thing to investigate in the event of a Hi
Current message is the voltage (as indicated by the K3) level during transmit.
The way Elecraft transceivers control power, a low voltage means that higher
current must be obtained to maintain the requested power output level.
Common causes are loose connections at the power supply, improperly assembled
Anderson PowerPole connectors, and either long power supply cables or too small
a wire gauge resulting in significant voltage drop when current is drawn.
This applies not only to the K3, but also to the KXPA100 and the K2/100.
73,
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