Hi All,
I have a KX3 and am doing some SOTA activations.
I have obtained a 4S LiPo battery which is somewhere north of 16 V with
full charge.
I would like to get a DC-DC regulator as a more elegany solution than
series diodes.
I have searched and searched but no solid outcomes.
Anyone have any
I installed the KXV3A feature and attempted to run the 1 Milliwatt
Transmitter Gain Calibration Test. The test failed as follows
Elecraft K3 Utility Version 1.12.12.17
OS Version 6.1 Build 7600 Windows 7/Windows Server 2008 R2
K3 MCU version 04.60. RS-232 speed 38400 bit/s.
Starting 1 milliwat
K3 users may wish to try my Macro's for using APF (CW Audio Peak Filter):
"APF ON" Turns on APF, puts VFO in Fine tune mode (1 Hz resolution):
IS ;SWH29;RT1;SWT53;RT0;RT1;SWT49;LK0;
"APF DN" Turns on APF, puts VFO in Fine, turns on RIT and tunes down 20
Hz:
IS ;SWH29;RT1;SWT53;RT0;RT
The PS in question is a regulated ps from an AOR 7030 receiver. It's got a bit
of ripple as well. Non adjustable but I may Change that. I don't want to stress
the regulators in the KX1... So maybe another supply is in order... Might be
easier.
Non judgement day is near
On May 12, 2013, at 5
Thank you Don...
Non judgement day is near
On May 12, 2013, at 5:41 PM, Don Wilhelm wrote:
> Phil,
>
> Exceeding the specifications with any equipment is "at your own peril" with
> any equipment.
> Although I doubt that 15 volts will cause a problem with the KX1, the
> regulators will gen
Phil,
Exceeding the specifications with any equipment is "at your own peril"
with any equipment.
Although I doubt that 15 volts will cause a problem with the KX1, the
regulators will generate more heat than the design point predicts - and
there may be other consequences.
A few diodes in the
The user book says 14vdc... I have a reg. power supply that does,15.000 vdc. Is
that going to be a problem?
Phil
Non judgement day is near
On May 10, 2013, at 7:02 PM, Mike Weir wrote:
> Good evening all, just making my way through the K2 build and had was
> wondering about some resistance
Good evening Don, Thanks very much for the great new I just wanted to make
sure all was well before I moved on to the next section.
Mike
VE3WDM
--
View this message in context:
http://elecraft.365791.n2.nabble.com/Resistance-checks-on-RF-board-page-38-tp7573563p7573602.html
Sent from the Elecra
I have found that the KPA500 and KAT500 combination is outstanding.
In fact one thing I noticed right away about the KAT500 is that when
it is tuned correctly I can both see and hear the difference in RX
signal strength in the headphones and on the P3 SVGA screen.
My Alpha 87A and Palstar AT5K ar
Mike,
The place to go next is to continue onto page 39 of the manual.
Note that for those values listed have a ">" symbol - which means
'greater than' (see page 22, top of the 2nd column).
A reading in the Megohms range is definitely greater than 20k, so no
problem.
The same thing applies to
Rick,
I don't have an exact answer for you, BUT --
I would suggest that you not use the digest mode. Instead sign up for
individual emails *AND* set up your email client (either on your
computer or on webmail) with a filter that puts all emails with
"[Elecraft]" in the subject line into a se
Good evening Don,
Here is what I have done,
1. I have tried reversing the leads on the DMM and the readings for lets say
U1 pin 4 to ground went from 3.9 mega ohms to 2.9 mega ohms. so not really
the reading I am looking for.
2. I heated up all the solder connections on the board and added sold
At the recent IDXC in Visalia, I bought the SVGA adapter for my P3. It
works just fine but I've noticed an apparent bug that I can't explain.
When just the panadapter display (with the waterfall) is showing, the
K3/P3 link to my PC's logging program (CommCat) remains stable. When the
Rx and Tx
I use 350 hz pitch and with a decent signal the APF works okay although its not
really needed under those conditions. When the signal is very very weak it is
hard for me to tell when the stations stops sending, ie the ring from noise
burst sounds the same as the station transmitting. For that
Bill,
I suspect it has more to do with the default reply nature of the group, in
that replies are sent straight back to the originator of the message rather
than to the group itself. It's not typical of the way that groups tend to
be set up these days and so catches us all out from time to time!
I received many direct emails - far more than are posted here. As they
were sent to me directly, I assume the sender's did not wish to share.
Hence, I would not feel comfortable in sharing same.
Suffice to say: Most emailers are happy with the KPA500 and do recommend
it. However, based on a nu
My KPA500 loafs at 400W with about 30W of drive (UK legal limit), driven to max
power it's about 650W with 35W.
I think the disparity between results may be down to the type of load being
driven.
Best regards, Tim Hague, M0AFJ
Skype m0afj.Tim
Sent on my iPad
On 12 May 2013, at 18:29, Scott Man
I still see people reading the SSB signal as low power on the meter and
believing it is PEP. Depends on who is reading the meter and the
peak/average setting as well.
73, Jim KG0KP
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behal
My KPA500 puts out 600-650 watts with 35 watts drive on all bands. I'm
not sure exactly what's going on with people getting 350 watts out. I'd
guess those reporting 350 watts are running high duty cycle modes, like
RTTY or AM.
People listening to your signal will likely notice very little
di
Right, Pf.
Also, the larger percentage of difference between two signals at lower audio
frequencies makes it easier to filter the unwanted signal out, either with a
physical filter or using the "gray matter" filter between our ears.
73, Ron AC7AC
-Original Message-
From: elecraft-boun
Hi
Just an update on the no power problem I reported last month.
After checking a series of RF voltages using a checklist from Gary I
located the problem as no RF from the KREF3 board at J65
I then removed the KREF board and all the cables, inspected board and re
assembled the KREF3 and reinsta
Bill,
Would you be willing to share the data you gathered with the rest of the
group? I just (as of late last night) replaced my AL-811H with a KPA500.
My tests showed output of 530-550 watts with 35 watts drive from my K3. I'm
very pleased with that result.
Thanks and 73,
-- Ian
Ian Kahn, KM4
thanks Ron, I guess this relates to Q=f/deltaf ? Didn't even think of
this, and it's interesting that the effect is noticeable at these
frequencies.
Pf
> "Ron" == Ron D'Eau Claire writes:
Ron> I believe that you'll find that is true of any filter. By cutting the
tone
Ron> freq
I believe that you'll find that is true of any filter. By cutting the tone
frequency almost in half (800 to 440 Hz), you almost double the effective
width of the passband. That leaves more room for the keying sidebands which
means less "ringing" or stretching of the keying transitions.
(I like low
Happy Mother's Day to all the YLs out there who own and/or support and work at
Elecraft.
Also a special shout out to the wives and mothers of us hams who
tolerate/support us and our interests in ham radio. This is my wife's Susy
first Mother's Day and we are going to celebrate it at the worl
I operate almost exclusively CW and my APF is never turned off.
I use a 400 Hz filter, BW set at @350 Hz, and a pitch setting of
440 Hz.
FWIW, I hear -no- "ringing".
73!
Ken - K0PP
On Sun, May 12, 2013 at 8:25 AM, Pierfrancesco Caci wrote:
>
> Someone mentioned that APF rings less when pitch
Sorry, that page 14 is at the back of the manual in the Troubleshooting
Appendix.
73,
Don W3FPR
On 5/12/2013 5:50 AM, mtebe...@mchsi.com wrote:
Don, thanks for your reply. I do not understand your reference to page 14.
Page 14 in my manual is nothing but resistors being installed.
I have not
Thanks to all who answered. I didn't know there was such a perceived
difference, at the receiving end, between 500 Watts and 850 Watts. I
have always been under the impression that doubling of power (3 db gain)
was the least discernible difference and that if you did not, at a
minimum, double y
I am considering replacing my 3-500 amplifier (puts out approximately
850 Watts) with the KPA500. My question: What have users been
experiencing as output power in the real world? Specifications make
great reading, but I am interested in what is real.
Thanks,
Bill W2BLC
__
Don, thanks for your reply. I do not understand your reference to page 14.
Page 14 in my manual is nothing but resistors being installed.
I have noticed that it is drawing 3.3 amps when set for 2 watts and displays
Hi-Cur.
I have checked all the components you mentioned and everything appear
Someone mentioned that APF rings less when pitch tone is set to 440 Hz
instead of 800 Hz. So, I'm trying and it indeed seems to ring less.
Anyone else hearing this?
Is this some DSP effect or a psychoacustic effect?
Condition of test:
200Hz 5-pole filter
DSP BW 50Hz
RF gain backed so that sign
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