From the firmware release notes:
K3 MCU 5.66 / DSP 2.88 / FPF 1.26, 11-28-2018
* ADDED SWR READ COMMAND: "SW;" returns the most recent SWR reading in
transmit or TUNE mode, e.g. "SW023;" for an SWR of 2.3:1. Max value
returned is "SW99;" (SWR = 99.9:1).
K3 MCU 5.64 / DSP 2.88 / FPF 1.26,
On Mon, Dec 15, 2014 at 9:40 PM, Bruce Chadbourne
bruce.chadbou...@gmail.com wrote:
Somebody else mentioned the Anderson pole connector - I've been in good
shape for several years so I expect it had been assembled correctly; but
I'm wondering if the connector surfaces are known for oxidizing?
KD7YZ tapped out:
I see my email-er somehow sent and resent the reply. no idea why,
however, I apologize for the hassle.
--
73
KD7YZ Bob
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Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help:
I see the same thing, but only on 10m. I just assumed (possibly erroneously)
the power indication was not accurate and used the indicated 100w. I don't
have an external wattmeter to validate. My antenna is tuned for 20m so tuning
it is not that hard on 10m.
Eric
wb7sde
On December 14, 2014
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
Bruce,
I would expect a Hi REFL message rather than Hi Cur if SWR was the problem.
Check your power supply connections. If you have bolts and nuts on the
power supply output terminals, if the bolts turn (even slightly) when
you tighten the nuts, you will have to dig inside the power supply to
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,
Is that 12.1V reading during receive or transmit (the voltage will tend to sag
when pulling higher currents during transmit)? I don't have a K3, but I do have
a KXPA100, and I find that it will not develop a full 100W if I only feed it
only 12V -- it works much better with a supply of 14V.
The
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
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
Don, et. al.
Thanks for the replies. I can repeat this problem (a good thing) at 20m CW
around 14.115 Mhz.
Power supply (Astron VS-35M, front panel meters) showing proper voltage,
and current knob set toward max.
At 14.050, SWR reads 1.0 on the K3. Power set at 100w. Voltage reads 13.8v,
then with
Gerry responded to me off-list (below). I think your Siri translation
meant reseating all plugs on the K3 and and maybe Colex was coax. In
response, yes I think I'm ok on those two points but will keep my eyes
open. Interesting that a couple other guys are seeing this. So far I think
it's only
Bruce,
It would appear to me that something has happened in your 20 meter Low
Pass Filter.
The K3 should develop 100 watts with about 17 amps of current. As I
indicated previously, the most common problem would be with the LPF.
Contact K3support for additional assistance and steps to
To the list:
I occasionally get the Hi Current warning on my K3. I notice it cuts my
power back about 10% from 100w. My initial assumption is that my SWR is
too high - but the SWR meter is easily less than 2.0 I run the ATU which
confirms SWR about 1.2 or so.
So what am I missing - something
Bruce tapped out:
I occasionally get the Hi Current warning on my K3. I notice it cuts my
power back about 10% from 100w. I run the ATU which
confirms SWR about 1.2 or so.
.
fwiw, my K3 is doing this quite often lately. I see it thru the KAT500
as well as the Palstar-AT-2K.
Same here, usually with the tuner showing an SWR of 1.2 or so. This never
happened in the past, I wonder if it is related to a software update?
I have to cut the power back, usually under 60 watts for it to go away.
Ken WA8JXM
On Dec 14, 2014, at 10:56 PM, KD7YZ kd...@denstarfarm.us
Maybe there is not enough voltage at the power input to the radio — possibly
due to high resistance at your power connections or in your fuse holders?
73, Matt VK2RQ
On 15 Dec 2014, at 8:18 am, Bruce Chadbourne bruce.chadbou...@gmail.com
wrote:
To the list:
I occasionally get the Hi
Jim,
I am not sure about the hang of this forum thing. It is just public
email where we try to help each other with Elecraft products.
You may have a problem with that wattmeter rather than the K2. Analog
metered wattmeters are notoriously inaccurate, especially at low power
readings.
Thanks for your insights. I'll take a look at all of what you have suggested.
I use the 20 watt scale, the next lower scale is 5 watts. The K2 and the
wattmeter agree on 10 watts on 30 meters, it's just the amount of current
that bothers me. I appreciate your help.
Thanks
Jim
--
View this
I bought a K2, sn 01489 on ebay. Had to replace the PA transistors and
drivers and R50. Upgraded the firmware. Anyway, on 30 meters, at 5watts, it
draws 1.56a. At 10 watts, 3.42a. Also a bit high, I think is 40 meters which
at 10 watts draws 2.46a, and 15 meters at 10 watts, 2.30a. The rest of
First, check the number of turns on toroids L18, L19 and L20 in the
low pass filter. I suspect they are OK, or you would have problems on
20 meters as well, but check anyway.
If this is a QRP K2, check the number of turns on T4. Normally the
green wire is connected to the PA transistor
Sorry, Don, I don't have the hang of this forum yet. My K2 is a bare bones
unit with the exception of the audio filter. I have a Diamond SX-200 power
meter and an MFJ-280C dummy load. It could be that it is wired for max
efficiency at 5 watts, but even at 5 watts, 30 meters stands out with
When I go to the tune mode the current starts at 23.5 amps and creeps up to
25 amps within 1/2 second.
the power out is 99.7 watts. and the Hi Current warning comes on...
supply voltage is 14.1 in stand by and 13.3 in tune shown on the K3
on the lower HF bands I have no problem.
on 10 meters 106
K7WIA wrote:
When I go to the tune mode the current starts at 23.5 amps and creeps up
to 25 amps within 1/2 second.
the power out is 99.7 watts. and the Hi Current warning comes on...
supply voltage is 14.1 in stand by and 13.3 in tune shown on the K3
on the lower HF bands I have no
K7WIA wrote:
When I go to the tune mode the current starts at 23.5 amps and creeps up
to 25 amps within 1/2 second.
the power out is 99.7 watts. and the Hi Current warning comes on...
supply voltage is 14.1 in stand by and 13.3 in tune shown on the K3
on the lower HF bands I have no
By setting the TUN PWR in the menue to 95 I now get 100 watts out and the
current is 23.4 at 13.3 volts
it does not trip the Hi Current untill the current goes to 25 amps...but now
remains steady
Should this be the right Current draw on 6 meters ?
Ed
--
View this message in context:
Dick,
That current is definitely too high (except on 20 meters).
The most common cause for that symptom is the Low Pass Filters. Do
count the number of turns on the toroids in the LPF area - count each
pass of wire through the center of the core as one turn. I believe you
will find you have
Question:
I am finding the following on my QRP K2 with KAT2, cal current set 3.7:
20 meters power setting 14.6, current displayed 2.84, CW
30 meters power setting 14.6, HI current displayed at CW TX, SWR
1.2:1, current 3.74
40 meters power setting 14.6, Hi current displayed at CW TX, SWR
I am embarrassed to say but I have a high current indication on
nearly all bands during Tx. (new build and I thought I was being so
so careful).
The Rec. draws 240 ma. at 12.4 volts. Does change slightly with
option changes.
Attempted transmitter Tune up Test Part Three page 77
First question is - why are you using 4.045 MHz - that is outside the
ham band. Use 3.750 MHz instead. Similarly, 10.00 MHz should be in the
range of 10.100 to 10.150 MHz. Also 25.012 is not a good frequency
either, use 24.90 That is not likely to change your results with the
HI-Cur
I'm having trouble with hi-current shutdowns at higher power settings on all
bands below 20 meters (30,40, and 80) . 20 meters and above work fine.
I bought and built a W1 wattmeter which when connected to the notebook is
really neat. output watts shown on W1 are a bit lower than shown on
Hi Gang,
This is my first post to the group and I am hoping you can help me.
After completing my K2 (s/n 5581) a couple months ago I was asked to
look at another local ham's K2 (s/n 600). All I was told was that it
didn't have any output and gave the Hi Cur warning with anything above
0.1
Kevin,
The most common reason for Hi-Cur along with low power output is something
wrong between the PA transistor collectors and the antenna.
First be certain that the K2 is operating into a good 50 ohm dummy load. If
the results you posted are into an antenna, the antenna feedpoint impedance
After a 4th july trip with my k2 upon keying it goes hi current, then
does a reset.
At any power level, any mode, any band,
finals not shorted, but get instantly hot when trying to go to
transmit before it resets. Can't measure any transmit voltages ,
since it won't stay in xmit,.
I
next clue : i pulled the outputs, which are not shorted and the set acts ok ,
that leads me to believe that I got a lowpass filter issue
especially since I get almost dead short at the output of the
finals/ input to the LP filters,,
onward,,,
bill
After a 4th july trip with my k2
Bill,
If you look at the schematic, you should discover that the LPF area will
indicate DC continuity to ground. The secondary winding of T4 connects the
input of the LPF to ground for DC.
Since the K2 was working before, you have only a single failure point -
keeping that in mind while
Gregg,
The problem appears to have been a batch of 1.6 ohm metal film
resistors (R19,20) that had 6 turns and produced a weak 10MHz or
thereabouts trap with C80,81 (4700pF). I believe Elecraft have sourced
some resistors with lower inductance. For the Brits, locally obtained
Vishay
What was the final resolution to the high current/low power out condition? I
swapped C80 and C81, but this did not cure the problem. I recall someone
saying that the problem was with two resistors (r20/21?). Is this the case?
73
Gregg
___
Elecraft
I just installed my KPA 100 with the KAT100 antenna tuner. Every thing
was working fine on all bands - until I attempted to tune on 40 meters.
Suddenly I got an alarm and the panel is locked - I can't get to menu or
any of the controls. The alarm is a continuous beeping. I removed the
high
Hello All,
Well I finally got it all together and working Sorta.
I have Hi current on 160M and with the requested power
set at 5.0W
I only get .3 out. The Hi Cur is on for about 2
seconds and then goes
to show you the power out. On 80 I have the same thing
but power is
normal. I tried setting
40 matches
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