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nd, and control the NB in the main receiver.
Or perhaps some day I'll figure out how to do that myself. However,
first the K3 NB has to work in the absence of strong signals, which it
does not.
--
Scott Ellington K9MA
Madison, Wisco
lead to unpleasant surprises.
73,
Scott K9MA
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7;s
almost certainly not a bad encoder.
If it's a firmware bug, as I suspect, others should observe the same
problem. Firmware is 1.02.
Has anyone else seen this?
73,
Scott K9MA
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of oil on the screw threads, and it works great.
73,
Scott K9MA
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. They're sold under several brand names, and there are several
versions, all basically the same. I'm guessing I'm not the only one who
was attracted to their low price.
The fix is easy, though it took most of the day to figure out. Contact
me if you need it.
73,
Scott
does to my KX-1.
Thanks and 73,
Scott K9MA
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s the case, I'd really like to find another way to secure them.
Any suggestions?
Or maybe someone can assure me that with all those K3 getting shipped
all over the planet for DX-peditions, etc., none of those wires ever
break. Ever. (I'd still take along some magnet wire.)
73
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I'm planning a vertical, as this would seem to require strictly less wire
and coils than any dipole or inverted vee, but am I missing some other
offsetting advantage?
Cheers,
Bruce
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On 3/3/2016 14:47, Fred Jensen wrote:
QRN, not QRM
I thought QRN was exclusively atmospheric noise. Perhaps we need a new
Q code for man-made garbage.
73,
Scott K9MA
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the K3/K3s could be
made to do that, I'd buy the 15 kHz filter instantly.
73,
Scott K9MA
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The old FT-1000D is notorious. (I have one.) I'm not sure about the
MP. There's a mod, which helps, but it's still wide. It's a big reason
I bought a K3.
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Madison, Wisconsin, USA
On 1/14/2016 11:26, Rick WA6NHC wrote:
I've noticed that it
he RX antenna
> on the K3. Currently the K3 does not send an update to the P3 if
> switching antennas causes the preamp or attenuator status to change.
> This is on Wayne's bug list.
Scott Ellington
Madison, Wisconsin
USA
_
z. We are so picky. Why does anyone put up with us :>)
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It's implicit in Alan's posting, but note that symmetrical square waves have
only odd harmonics. The even harmonics will be very, very weak, present at all
only because the square wave isn't quite perfectly symmetric.
Scott K9MA
Scott Ellington
Madison, Wisconsin
USA
On Apr
r's
>> frequency so the pitch between USB and LSB match. I
>> relies the above method requires a good ability to note
>> slight changes in pitch. Some of us do not posses that
>> ability and must use a different method. For those that do,
>> this method works.
>> __
>>
> ______
an actual frequency, and if the sidetone
> frequency is derived from the same master oscillator aren't you defeating the
> purpose of your calibration. It seems logical to me to a method of
> calibration that your reference is not derived from the same oscillator you
> are t
L for zero beat as
above. (You may be close enough initially.)
8. Using the K3 utility, save the configuration. (Or record the REF CAL
value.)
9. Cancel SPOT and exit the menu.
73,
Scott K9MA
>
Scott Ellington
Madison, Wisconsin
USA
___
lose, you'll
> hear the combined audio signals fading up and down rather than a "beat
> note." That fading *is* the beat note but it's too low a frequency to
> hear it as a tone.
Scott Ellington
Madison, Wisconsin
USA
_
justs vfo's
>> so when at band edges I do not go out of band. However when using DX spots
>> with N3FJP auto tune clicks I am off freq. Have to dial around to get clear
>> signal so if I don't then they do not hear my calls well. Am sen
t the solder wicks up the wire a ways and makes it brittle, so you need
to make sure the wire doesn't flex a lot near the connector.
73,
Scott K9MA
Scott Ellington
Madison, Wisconsin
USA
On Mar 25, 2011, at 12:02 PM, George A. Thornton wrote:
> I am not an electronics expert, bu
ecraft
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> ___
It may NOT be a good idea to gate the KEY_OUT with the foot switch because of
timing issues. If you release the foot switch while transmitting, the
amplifier relay, especially a fast QSK relay, could release before the K3 RF
output decays, resulting in hot-switching of the relay. KEY_OUT appar
27;t even see a spare pin on the
MCU chip that could be used to gate KEY_OUT.
End of discussion, I think.
73,
Scott K9MA
On Mar 11, 2011, at 3:26 PM, Scott Ellington wrote:
> Not necessarily. The PTT Out line may control more than just the internal
> amplifier relays. For example, i
the problem?
>
> 73s Jim
> On Mar 11, 2011, at 2:47 PM, Scott Ellington wrote:
>
>> I think this is normal, and it's annoying. I don't know of any other
>> transceiver that behaves this way.
>>
>> 73,
>>
>> Scott K9MA
>>
>
the relay activation. Did I overlook something or is this
> normal?
>
> Tnx de Sy K6PWP # 5223 (one week old)
> ______
Scott Ellington
Madison, Wisconsin
USA
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footswitch for this "manual" operation times.
>>
>> Wouldn?t it be possible for the K3 firmware to have different delay time
>> entries
>> (for PTT ON and PTT OFF) between using the serial port keying and using the
>> Key Ports on the back side
>
gt; This calibration sets up a reference voltage inside the K3. But do it with
> an accurate DVM. Then see what the K3's internal shunt voltage is reading.
> That's what you are actually seeing.
>
> 73, Guy.
>
> On Mon, Feb 28, 2011 at 12:48 PM, Scott Elling
Has anyone compared the K3 internal current meter to an accurate external
meter? My K3 meter reads about 20A, when the actual current is 23 A, with no
accessories connected. That's a huge error, and it's not linear.
73,
Scott K9MA
Scott Ellington
Madison, Wis
They did!
Scott K9MA
On Feb 28, 2011, at 10:56 AM, Amateur Radio Operator N5GE wrote:
> It would be really be nice if they had designed the P3 with a cutout in the
> rear
> for an External Display. That way they could add an external video output at
> a
> later time.
>
>
>
> Could this be a setting that needs changed, or are my finals fried. The
> radio worked well before the trip. This wasn't the only problem, this was a
> very tough trip in many different ways.
>
>
>
> Why does my K3 only put out 12 watts? What can I d
n empty band, it did help during the contest, when other kinds of NB
are useless.
73,
Scott
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USA
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&g
; signal displayed on the screen it left alone and unaffected by my filter
> choice other then the fact that the cursor itself has changed size.
>
> phil
>
> On Feb 23, 2011, at 11:08 AM, Scott Ellington wrote:
>
>> The K3 IF output to the P3 comes from the Post-amp follow
st mean
> that the sample of the IF signal is before the roofing filters. If that is
> the case then I am assuming that the signal within the frame of the cursor
> is not a signal that has passed through my roofing filters.
>
> Is this a correct interpre
A good one.
Scott K9MA
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interesting to have a collection of these measurements.
You'll need to be fairly loud here.
73,
Scott K9MA
sdell...@facstaff.wisc.edu
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Madison, Wisconsin
USA
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n/listinfo/elecraft
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Scott Ellington
Madison, Wisconsin
USA
future, and less
> voltage drop (twice as much on 120V).
Scott Ellington
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Po
Sub-Rx has 2.8 and 13-KHz.
>>
>>
> __
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> Post: mailto:Elecraft@mailman.qth.n
Notice I am not in USA or EU
> with strong stations near me, I don´t have the QRM this big populations
> have, trying to reduce the splatters.
>
>
>
> 73,
>
> Jorge
>
> CX6VM/CW5W
>
> k3 #4077
Scott Ellington
Madison, Wisconsin
USA
I must disagree with Ron about the "matching tones". When you "zero beat" the
transceiver with a received signals using the sidetone or spot tone, matching
the frequencies of those two audio tones is exactly what you are doing. With a
tracking sidetone, as in most modern transceivers, those tw
idst band noise and other
> signals.
Scott Ellington
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have tracking sidetones, generated
by exactly the same frequencies which produce the received signal beat note.
73,
Scott K9MA
On Feb 1, 2011, at 1:03 PM, Ralph Parker wrote:
> Funny how 'zero beat' means something different today compared to years ago.
Scott Ellington
Madi
is every reason to provide two separate volume controls. and no
> useful reason for them to be adjusted by a single volume control.
>
> Richard K5BWV
>
> Sent from my iPhone
>
> On Jan 31, 2011, at 15:47, Scott Ellington wrote:
>
>> How about independent
-Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Scott Ellington
> Sent: Monday, January 31, 2011 3:16 PM
> To: Elecraft Reflector
> Subject: [Elecraft] K3 Spot Tone Level
>
> The K3 "Spot"
one was, so the Spot tone would help me
zero-beat accurately. Anyone else have that problem? (CWT isn't useful if
there are multiple signals in the passband, as there usually are in contests.)
73,
Scott
Scott El
r? The challenge would be to teach the filter to
> ignore stations who are not calling you :-)
>
> 73,
> Geoff.
> GM4ESD
>
>
> Scott Ellington wrote on Monday, January 31, 2011 at 18:38Z:
>
>
>
>> Now that we have such great filters in the K3, we have anothe
eally need is a feature which
gets the OTHER station on frequency. Now, I understand that this is
technically challenging, but that's just the sort of thing the folks at
Elecraft are so good at.
Meanwhile, I guess we'll just have to hope that more of those operators buy
K3's.
73,
rue RMS responding
> meter...which is not what is in the K3 dBV meter.
Scott Ellington
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USA
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ts of them on 160.
Any who want to argue, let's do that off line.
73,
Scott K9MA
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On Jan 25, 2011, at 1:02 PM, Jim Brown wrote:
> On 1/25/2011 10:37 AM, Scott Ellington wrote:
>> but my AL-82 once blew the 15 A 240 V fuses, which suggests PF was less than
>> about 0.7.
>
> More to the point, the main thing that blows breakers with very large
> powe
ear supply (just like the HV
supplies in the tube-type amplifiers), it probably also has a power factor in
the 0.7 range, and probably draws 11-12 A at 120 V. A dedicated 20 A circuit
would improve regulation.
73,
Scott K9MA
Scott Ellington
Madison, Wis
ith him have not shown
> the spurs ... but ... I've not seen his signal as strong as it was
> at the time.
>
> There's no doubt they were "real", but what might be the
> cause? Is / was the problem with his K3, my K3 or my P3.
>
> Thoughts?
>
> 73!
&g
No doubt Eric or Wayne has done that calculation.
73,
Scott K9MA
On Jan 13, 2011, at 10:39 AM, Eric Swartz WA6HHQ - Elecraft wrote:
> Approximately up to 10:1 on most bands. Less on 160M and 6M.
>
> 73, Eric
Scott Ellington
Madison, Wisc
ristics, but it saves a lot of fiddling around with the RIT or split
> knobs. That said, when things get real tough or I get tired, I'm very glad
> of the ability to shift the upper or lower limits independently, the very
> nice narrow roofing filters and amazing non-ringing DSP good d
Exactly.
Scott K9MA
On Jan 13, 2011, at 9:15 AM, Guy Olinger K2AV wrote:
> The answer to the question is a fairly large dataset,
Scott Ellington
Madison, Wisconsin
USA
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On Jan 13, 2011, at 8:47 AM, Gary Mohrlant wrote:
> I have looked at the manual and on line and I haven't found the tuning
> range of the KAT3 tuner. Anyone have this info?
>
> Gary W0GHZ
Scott Ellin
73,
Scott K9MA
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,
> with the shield bonded to the chassis at each end. Now, the RF current
> flows on the coax shield to the chassis at each end, so it does not
> cause problems with the keying circuit.
Scott Ellington
Madison, Wisconsin
USA
27;s probably not the worst the K3 is likely to
>> see. (Field Day, expeditions?) I've had to take measures to keep RF out of
>> other equipment, though not the 60 pound behemoth next to the K3.
>>
>> I haven't looked into it, but maybe there's
jacks more directly to the chassis. (This is a classic cause of RF
susceptibility.) If not, a few ferrite cores is a small investment.
73,
Scott
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tly right. The MRF150 MOSFETs used in ALS600 are rated at 20dB. I
> know people who homebrewed similar amplifier without series resistor and have
> full 20dB of gain - no problem whatsoever, stable like a rock.
Scott Ellington
Madison, Wisc
> series 35 ohm resistor for matching and reducing gain.
> Phil - AD5X
>
> ______
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USA
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if you want to fly under the radar, there are certain high
> quality amplifier manufacturers overseas (closer to W6 than W2...hint
> hint) who will custom make you an amp for low power drive. Check the
> FT817 Yahoo group archives.
>
> de Doug KR2Q
> had my fill of QRO ages ago
> __
, validating Elecraft's
> retention, however ancient the issues and artifacts of the IF method
> may be.
>
> 73, Guy.
>
> On Tue, Dec 14, 2010 at 11:28 AM, Scott Ellington
> wrote:
>> The K3 noise blanker bandpass filter appears to have a bandwidth of about
>&
tle divots falling off
> along the top and right side edges. It is looking quite ragged.
> Has anyone else had this, or know if I can replace just the
> rubber/plastic part, or do I need to replace the entire switch
> assembly?
>
> Than
question about the K3, it seems to me that when in DATA A mode
> that the state of the KEY jack should be ignored. Even if KEY has a
> closure, it should not impact PTT in DATA A or SSB modes, or am I
> mistaken.
>
> 73, de Nate >>
>
Another interesting question is how any manufacturer of ham radio gear is going
to stay in business once we aging boomers stop buying new radios.
73,
Scott K9MA (Check 66)
Scott Ellington
Madison, Wisconsin
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ses a fiber disk to provide the friction. The result is a
> slight bit of noise as the knob rotates along the disk.
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sure good 2Khz dynamic
> range.
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This lis
nd the audio from the monitor.
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This lis
other 0.1 V drop.
73,
Scott K9MA
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This
crimp tool. The welding
cable would weigh more than the K3.
That said, I'm considering remote sensing, but I'll have to reverse-engineer
part of the power supply to do it. If it works, I'll post the method and
results, though it will only apply Samlex SEC-1235.
73,
Scot
g in the case like aluminum tape or
> something like it. Would that work?
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ray
> RF exiting the XG2 by radiation rather than conduction.
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If one wants to measure MDS, a metal enclosure is probably necessary.
Scott K9MA
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rs my find differently, of
course, though the filter in my head probably isn't an exceptionally good one.
There are some very good cw contest operators who do nearly all their operating
using the SSB filter.
Scott K9MA
Scott Ellington
Madison
generally higher or lower in pitch.)
4. If the two sidebands don't sound the same, adjust the offset for that
filter until they do.
This assumes, of course, that your xtal filter is OK except for a possible
offset.
Hope this is of use to others.
73,
Scott K9MA
Scott El
quit using the thing
> and got a nice Astron 35m which is totally silent. I hate fan noise.
>
> N4LQ
> Steve
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that's not an issue. Any
> Samlex owners care to comment?
>
> Thanks for any feedback.
> chuck
> af4xk
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some part.
>
> This evening after the work I will try with K3 Utlility and I will check the
> connectors.
>
> 73 to all.
>
> Luigi HB9CXZ
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Sounds like RF feedback. Do you see the same problem with a dummy load?
73,
Scott K9MA
Scott Ellington
Madison, Wisconsin
USA
On Oct 14, 2010, at 2:37 PM, Luigi Casari wrote:
> Ragards to all,
> I have just discovered a problem, 28 MHz or 21 MHz SSB, during transmission
> the p
craft support?
>
> 73,
>
> Scott K9MA
> ______
>
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f I
> choose to 'Use factory default RF Gain calibration data' then all is well,
> so is this a bug within the latest utility I wonder?
>
> Thanks
>
> 73 Stephen G4SJP/
>
>
> _
Scott Ellington
Madison, Wisconsin
USA
_
, I/II would not
switch to the 2.1 kHz filter. Behavior was similar in CW mode. Am I missing
something?
73,
Scott K9MA
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i-Key.
Scott K9MA
On Aug 20, 2010, at 3:00 PM, Scott Ellington wrote:
> Some power supplies, like the Samlex SEC 1235, have no built-in overvoltage
> protection. All regulated power supplies are capable of producing much more
> than their normal output voltage if any one of a number o
e you can count on
that.
Scott K9MA
On Aug 20, 2010, at 3:22 PM, Paul Christensen wrote:
> AD5X created a similar circuit using a single high-peak-current
> transient suppressor:
>
> http://www.radiodan.com/ad5x/images/Articles/VcondRevA.pdf
Scott Ellington
Madis
power supply output and, if
necessary, blow a fuse.
http://www.ssec.wisc.edu/~scotte/hr/OVP.pdf
I haven't built this one yet, but a very similar one I built in 1984 worked
fine.
73,
Scott K9MA
Scott Ellington
Madison, Wisconsi
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