I thought ML serviced Elecraft in the UK. Sad that that's gone. My
experience with my KX3 was to send it to America. This was pre-Brexit, so...
It was sent to America for repair of a rotary encoder and addition of the
2m module back in 2019. This was a paperwork nightmare as I had to export
it as
Are you talking about the output frequency as measured on another device?
Or the numeric readout on the radio's own display?
I've seen shifts in some situations on 2m, which I think was RF getting
into it. If you turn off Mic Up/Down button control maybe it will help
there.
I've had issues where
10W on 20m this weekend
using Morse Code. Antenna was bigger which helps, though it was a dipole
who's main radiation pattern would have been more North/South (just the way
our garden is oreinted) not East/West.
- Richard
On Tue, 21 Apr 2020 at 10:14, Richard Corfield
wrote:
> It really sounds f
It really sounds from the posts as if the radio and everything connected to
it was acting as counterpoise to the ham-stick. This is dangerous because
it means your radio is acting as part of the antenna. You don't want to
touch antennas while they are transmitting, especially at higher power.
The
) seemed OK, if I take the response "America only please" as
indicative the other station heard me and my signal was good enough for him
to tell I was not in America.
- Richard
On Wed, 5 Feb 2020 at 22:07, Richard Corfield
wrote:
> The metal shield cover on the 2m module
is - could
any damage have done if it had contacted the vias/pads on the board there?
- Richard
On Wed, 5 Feb 2020 at 21:01, Richard Corfield
wrote:
> I've done some further tests and proven the problem is with the MH3. So
> I'll have to take that apart and look for the problem.
> The radi
.
Thanks
- Richard
On Wed, 5 Feb 2020 at 15:29, Nr4c wrote:
> Turn down TX Monitor volume.
>
> Sent from my iPhone
> ...nr4c. bill
>
>
> > On Feb 5, 2020, at 5:23 AM, Richard Corfield
> wrote:
> >
> > I had issues with RF feedback on the MH3 during
, Nr4c wrote:
> Turn down TX Monitor volume.
>
> Sent from my iPhone
> ...nr4c. bill
>
>
> > On Feb 5, 2020, at 5:23 AM, Richard Corfield
> wrote:
> >
> > I had issues with RF feedback on the MH3 during the UKAC SSB 2m contest
> > last night. It s
I had issues with RF feedback on the MH3 during the UKAC SSB 2m contest
last night. It seemed intermittent. Result was terrible noise in Monitor
output (my headphones) and to the other station, so it affects the audio
input. With experiments at the time and this morning:
- Occurs when RF
I don't do field day. I've been using monoband dipoles so far for portable
operations due to cost and weight constraints. They work incredibly well,
and I hope to go out with a high Q antenna for 30m and a long pole to try
end fed vertical. (My long pole seems stuck in the post! Courier emailed.).
The compression modulates the signal. That will have a fourier transform of
its own. If we think of it as a simple amplitude modulation then, as for AM
signals, the spectrum of the original signal will be combined (convolved)
with upper and lower sidebands representing the spectrum of the
That's interesting thanks. It means that by aiming for no ALC indication
I've been under modulating.
I assume the input stage in the KX3 can take higher levels?
On Fri, 28 Jun 2019, 16:35 Bob McGraw K4TAX, wrote:
> Well written generic paper for operation of FT-8 and other digital
> signals of
ckage online going and return. Worked
> just fine. All the best.
> 73, Roger VA1RST Halifax
>
> Sent from my iPhone
>
> > On Jun 28, 2019, at 1:02 PM, Richard Corfield <
> richard.corfi...@gmail.com> wrote:
> >
> > I used UPS and need to write up my experien
You'd think they'd include the predictable fees in the price to the sender.
It will be really bad if they charged the recipient, especially if the
parcel went through customs ok.
On Fri, 28 Jun 2019, 19:35 Don Wilhelm, wrote:
> Brian,
>
> Use the postal system. There are no "brokerage fees"
I used UPS and need to write up my experience. Your question will encourage
that!
I found that UPS's Customs Forms generator produced a Sales Invoice even
though I asked it to produce a Temporary Export for Repair. So I crossed
out the Sales part and wrote in pen that this was a repair and will
Serial number is 8383, if that helps place the manufacturing date and
therefore whether it's part of a batch with a known issue?
- Richard
On Thu, 13 Jun 2019 at 08:03, Richard Corfield
wrote:
> I've tried that with no success. Though I'd have been surprised as the
> trace lab
either.
- Richard
On Wed, 12 Jun 2019 at 23:53, Bill Frantz wrote:
> On 6/12/19 at 2:52 PM, richard.corfi...@gmail.com (Richard
> Corfield) wrote:
>
> >I've tried my KX3 today and noticed that the left hand volume rotary
> >encoder is not working. Is this a common problem
I've tried my KX3 today and noticed that the left hand volume rotary
encoder is not working. Is this a common problem? Is there anything I can
do to try to get it working again?
I'm in the UK and this is a second hand radio, so I can't so easily just
sent it back to Elecraft I don't think.
A
Which is interesting. We were taught that you can recover signals up to the
Nyquist frequency (half sampling frequency) before aliasing becomes an
issue. People low pass filter well before then to avoid aliasing issues,
but it means you need a sampling frequency sufficiently more than twice the
I was getting confused momentarily with Direct Conversion :-)
On Wed, 5 Jun 2019 at 13:23, W2xj wrote:
> Direct sampling has no image issues.
>
> Sent from my iPad
>
> > On Jun 5, 2019, at 3:23 AM, Richard Corfield
> wrote:
> >
> > I'd have thought that superhe
I'd have thought that superhet would always have the advantage of improved
image rejection due to the IF band filtering. It would also allow ADCs and
associated processing to run slower or lower down in relation to its
Nyquist frequency so allowing for more detail in the sampled signal. Also
can
I'm experimenting with portable antennas at the moment for my KX3 and,
rather than cut the 80m legs of my link dipole to get an antenna that
resonates on 60m, I've experimented with running it off centre. I've found
what looks like resonance at the right frequency range, based on low return
loss.
Don't Elecraft recommend using lower power for high duty digital modes?
(Though FT8 us 15s bursts so not as high duty as some).
- Richard
On Mon, 18 Mar 2019 at 18:46, Tommy wrote:
>Ahhh, O.K., with my 13.2v Astron it's showing 10.3 - 10.8. I guess
> for now with this power supply I'll
had to retighten the mount bolts but have not needed
> to
> repair anything in the radio.
>
> 73
> George AI4VZ
>
> -----Original Message-
> From: Richard Corfield
> > >
> > > The toroids don't seem fastened down in any way. Cycling with it in my
>
Hi Richard,
>
> The toroids weigh almost nothing and the wire is very strong. We've never
> had an issue with toroids coming loose under normal levels of vibration.
>
> 73,
> Wayne
> N6KR
>
>
> > On Mar 5, 2019, at 10:11 AM, Richard Corfield <
> richard.corf
The toroids don't seem fastened down in any way. Cycling with it in my
pannier bag today over our rubbish roads I was a bit worried about it.
Could they shake loose given the vibration? Do I need to do anything to
protect them? (Though I note instruction requiring them to be movable
should I ever
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