On 7/20/2014 10:32 PM, Wes (N7WS) wrote:
Not if exchanging call signs takes 10 minutes instead of ten seconds.
There are excellent reasons for QRP.
As chance would have it, I spent an hour or two today at the NCDXC club
picnic chatting with AF6RT, who spent Friday and Saturday lighting up a
On 7/20/2014 10:42 PM, Wes (N7WS) wrote:
Sounds good to me. http://sadxa.org/n7ws.html#amp
Beautiful work, Wes
73, Jim K9YC
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Help:
Two answers below.
73,
Lyle KK7P
1) Can the KXPA100 and KX3 tolerate the higher voltages of a fully
charged 14.8V battery pack? (In the range of 16V).
No. The products are not guaranteed to FAIL if you apply 16 V, but they
are not designed to operate from 16 V, either.
2) Do the KX3 or
Very FB, Wes, and it has the requisite two meters: plate current and
grid current.
73, Paul N6LL
On 7/21/2014 9:38 AM, Jim Brown wrote:
On 7/20/2014 10:42 PM, Wes (N7WS) wrote:
Sounds good to me. http://sadxa.org/n7ws.html#amp
Beautiful work, Wes
73, Jim K9YC
On 7/21/2014 9:51 AM, Lyle Johnson wrote:
The PA (KX3 or KXPA100) operates directly off the supply power and
current is proportional to power level and drive, but not supply voltage.
Thanks, Lyle. The additional question I was asking here is if the
KXPA100 pull proportionally less current
I think some where my original question go lost. Can the K3 operate key
down at 100W's.
I did get an answer, yes - 120w for 24hr's... So the answer is yes.
I complicated things by adding JT65 and that I operate at 0.5 to 2 watts
with my KX3, but up to 20w with an IC-706. Yes, if I am -25db
Well, yes... {less powerful engine} After the late 60's the rules were
changed to require all cars to operate under the same limits. NO more
turbine cars... (for a $6 ball bearing...)
steve WB3LGC
On 21-Jul-14 1:34 AM, Wes (N7WS) wrote:
Or, when they're patting your face with a shovel saying,
The problem with this is, if everyone else is as misguided, then they are
transmitting with ten watts too. So their signals are 10 to 20+ dB weaker than
with higher power, hence there are fewer stations to work, ie. less DX.
Furthermore, with more power, faster modes of communicating are
] K3 power out - key down
The problem with this is, if everyone else is as misguided, then they are
transmitting with ten watts too. So their signals are 10 to 20+ dB weaker
than
with higher power, hence there are fewer stations to work, ie. less DX.
Furthermore, with more power, faster modes
Club
Staunton, Illinois
email: b...@wjschmidt.com
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wes
(N7WS)
Sent: Sunday, July 20, 2014 9:05 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 power out - key down
The problem
Subject: Re: [Elecraft] K3 power out - key down
Message-ID: 011e01cfa426$5fba6f80$1f2f4e80$@wjschmidt.com
Content-Type: text/plain; charset=us-ascii
Have you ever listened to the interviews of the Indy car drivers after a
race? Do they say: I wish I had a less powerful engine to make
ORIGINAL MESSAGE: (may be snipped)
On 7/20/2014 12:36 PM, Edward R Cole wrote:
The software provides about 10-dB better SNR (making the 10w JT65
signal equivalent to 100w CW).
REPLY:
I find an 8877 provides about 22 dB SNR over ten watts. :-)
73, Bill W6WRT
I'm not a QRP fan for DX. However, one can definitely copy a weaker
signal with JT65. No matter how much power you have, you can't work
them if you can't copy them. It seems like the magic combo is 1500 W
and JT65 on both ends. I think guys are resorting to this on 160M to
try and squeeze
Not if exchanging call signs takes 10 minutes instead of ten seconds.
On 7/20/2014 8:57 AM, Milverton M. Swire via Elecraft wrote:
which can actually *lower* the total QRM
level.
And! here all along, I thought LESS Power, LESS QRM!!!
Oh well!
73 MILVERTON /W9MMS
Or, when they're patting your face with a shovel saying, I wish I'd spent more
time working QRP.
On 7/20/2014 12:36 PM, Edward R Cole wrote:
Subject: Re: [Elecraft] K3 power out - key down
Message-ID: 011e01cfa426$5fba6f80$1f2f4e80$@wjschmidt.com
Content-Type: text/plain; charset=us
Sounds good to me. http://sadxa.org/n7ws.html#amp
On 7/20/2014 2:09 PM, Bill Turner wrote:
ORIGINAL MESSAGE: (may be snipped)
On 7/20/2014 12:36 PM, Edward R Cole wrote:
The software provides about 10-dB better SNR (making the 10w JT65 signal
equivalent to 100w CW).
REPLY:
I
Just how many people are running high power on low power modes like jt65?
I work the world with 10 watts.
Gerald - KC6CNN
On Jul 19, 2014 10:48 AM, Phil Wheeler w...@socal.rr.com wrote:
Hmm .. makes me wonder if a failed fan would result in an error message
and/or graceful power roll off to
I don't use that mode and generally run no more
than 40 watts on PSK31 with the K3.
But this statement below The K3/100 has two fans.
The KX3 has no fans. Apples and oranges. made me
wonder if fan failure could be an issue with the
K3/100 -- and one which might affect those running
less
I thought it was weak signal mode, not low power mode.
I don't think the XYL would permit an array large enough to work 6m EME
with 10W... everyone has a dream!
73,
Josh W6XU
On 7/19/2014 2:27 PM, Gerald Manthey wrote:
Just how many people are running high power on low power modes like
On 7/19/2014 2:27 PM, Gerald Manthey wrote:
Just how many people are running high power on low power modes like jt65?
I work the world with 10 watts.
You are misinformed. JT65 is NOT a LOW POWER mode, it is a WEAK SIGNAL
mode. BIG difference. Caps added for emphasis. On VHF/UHF, it is quite
Yes I guess I was not totally informed. I took the suggestions from the
book and translated it to mean low power.
I read the user guide for jt65hf and it said in part Running at full
output power is
seldom necessary or desirable due
to the incredible sensitivity of JT65.
Most users find 5 to 10
ORIGINAL MESSAGE: (may be snipped)
On 7/19/2014 5:44 PM, Gerald Manthey wrote:
and I work the world on 10 watts.
REPLY:
I encourage the Geralds of the world to continue with their ten watts.
Makes DXing easier for the rest of us. :-)
73, Bill W6WRT
Thanks, You didn't use a brick?
I expected the K3 to handle 100W as there were no comments that I remember.
With your comments it doesn't matter how the 500W amp would work as I
doubt if I would want to run more than 100W, either.
I also have a IC-706 100W rig but it will only handle ~40W
It takes 80W drive to get my amp to full output. I've run my K3
continuously for hours at a time at that level on JT65. No issues at all
and never even noticed it getting hot.
73,
Josh W6XU
On 7/18/2014 5:04 PM, Steve wrote:
No, I wouldn't run 100W on JT65.
Hi Bruce,
The most common cause of this problem is the TX calibration which you have
performed. Since that didn't do the trick you should touch up the results of
the calibration using the instructions at the top of the K3 manual page 62
(CONFIG:TXGN). You only need to do this on those bands that
Update
Not sure how I missed this, but I just determined that this ONLY happens
when NOT in SPLIT mode. And it happens on BOTH K3s. I had my other K3
in split and did not notice it. I can reproduce the same symptom on both
K3s when NOT in split but - when in split both are fine.
Mike,
That seems to have fixed it!
Thanks!
Gordon - N1MGO
On 19 Mar 2013 at 4:32, Mike K2MK wrote:
Hi Gordon,
Hopefully it is a simple calibration problem. Redo the Calibrate Transmitter
Gain from the K3 Utility program Calibration tab. If you still have problems
you may need to
Hi Gordon,
Hopefully it is a simple calibration problem. Redo the Calibrate Transmitter
Gain from the K3 Utility program Calibration tab. If you still have problems
you may need to touch up the results as directed at the top of page 62 of
the K3 manual. Be sure to check every band. Typically the
Glenn,
This happened to me recently, and in my case it was a TMP cable between
the KREF3 board and the RF board that had become dislodged. No doubt
there are other possible causes, but that's a relatively easy one to check.
73,
Rich VE3KI
K5ZE wrote:
I have K3 serial number 2802 with the
Glenn,
Can you do the Transmit Gain Calibration manually (from the menu - see
the K3 manual)? Try it - it must be done on each band, and should be
done forst at the 5 watt level and then the 50 watt level. Which bands
succeed and which bands fail?
73,
Don W3FPR
Glenn Haffly wrote:
I have
Can you try it on 10-15m. At 120 set, the power on this band seems to be
lower, as measured by LP-100.
Ignacy
--
View this message in context:
http://n2.nabble.com/K3%3A-power-out---V%2C-A-readings-tp1687381p1689821.html
Sent from the Elecraft mailing list archive at Nabble.com.
Jan Erik Holm wrote:
Please Elecraft, make a FW change and limit the radio
to 100W, thanks!
Human nature being what it is, the likely result of this would be a
large number of people refusing to upgrade their firmware any further
and a significant grapevine message about how new purchasers
Jan Erik Holm wrote:
After measuring the TX IMD on SSB I stopped putting the
radio above 100W.
Jim try setting your power supply so you have 13.8-14.0V key down at maximum
power and see if that helps the IMD some.
73, Bill
--
View this message in context:
OK that could be done, I will experiment further when
I do get some time. I know I have checked the PS voltage
but dont remember what it was, have to go down into the
basement and check. Now checked, it´s 13.88 at 100W and
13.84V at 120W.
IMD comes up 8dB at 120W compared with 100W. Stays pritty
: Saturday, December 20, 2008 9:56 PM
To: Ron D'Eau Claire; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Power out
Ron
A crowbar circuit is used to disable the power supply in the event of over
voltage. The current limit is what would limit the current output of a
power supply.
A typical
Those numbers look similar to mine if you're testing on 40 meters, Doug.
The efficiency of the K3's transmitter varies from band to band, with (IMX)
40 meters having the best efficiency and so the lowest current drain vs. RF
output.
Ron
-Original Message-
Well, prompted by the
Okay, so then did voltage (and amp) readings using the K3
itself. Watts are also read from the K3.
Receive: 13.6 / 0.75
13.6 is a little low. I would touch up the trimmer on the
regulator to make the voltage 13.9 or 14.0 on receive. The
K3 and particularly any accessory connected to
David Woolley (E.L) wrote:
Jan Erik Holm wrote:
Please Elecraft, make a FW change and limit the radio
to 100W, thanks!
Human nature being what it is, the likely result of this would be a
large number of people refusing to upgrade their firmware any further
and a significant grapevine
Hello Gary, and congratulations! Opening up the K3 again is not nearly as
traumatic as you might think.
The POWER control will *ask* for more than the rig can deliver. It's spec'd
at 100 watts, and that's what is guaranteed. The K3 can make a bit more than
100 watts on most bands, but that's all
I got following data with IFR AM/FM 1600:
K3 sn1302
POWER SET(W) POWER OUT（W) Difference ERR(%)
0 0.15 0.15
0.1 0.15 0.05 50.00%
0.2 0.3 0.1 50.00%
0.3 0.31 0.01 3.33%
0.4 0.4 0 0.00%
0.5 0.51 0.01 2.00%
0.6 0.63
: RE: [Elecraft] K3 Power out
Hello Gary, and congratulations! Opening up the K3 again is not nearly as
traumatic as you might think.
The POWER control will *ask* for more than the rig can deliver. It's
spec'd
at 100 watts, and that's what is guaranteed. The K3 can make a bit more
than
100
After measuring the TX IMD on SSB I stopped putting the
radio above 100W.
IMO the K3 should be limited to 100W, it is sad to see
it isn´t.
My advice would be, on SSB never go above 199W, on CW
it doesn´t matter.
Please Elecraft, make a FW change and limit the radio
to 100W, thanks!
/ Jim SM2EKM
Sorry made a typo. 199W should be 100W.
Jan Erik Holm wrote:
After measuring the TX IMD on SSB I stopped putting the
radio above 100W.
IMO the K3 should be limited to 100W, it is sad to see
it isn´t.
My advice would be, on SSB never go above 199W, on CW
it doesn´t matter.
Please Elecraft, make
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