Hello,
I posted the work below to an eHam forum and one reply suggested posting to
this site.
Thru another reply I have already verified that my interpreting of the
K3-block-diagram is ok.
So, left unanswered is the reason for the 2-pole crystal-ladder-filter.
Hello,
I'm to give a talk
Hello Don W3FPR,
I need to comment about reputable brands relative to
USB-to-serial-adapters.
Triplett-Keyspan is not reputable, in my opinion.
The story goes like this.
I have an AIM-4170 analyzer that needs a RS232 connection.
The AIM works when connected to a Dell desktop's RS232 port.
For
Hello,
Yesterday, Walt K6WRU wrote In analog filter design, you get to choose
between good phase performance and good amplitude performance. You can't
have both. If you want a flat passband and steep skirts, you'll get wonky
phase.
I suppose that is basically correct for the standard
Mike W0MU gave a good beginning, only there is more to the story.
(I gave a class on RFI this past February to our club, so the topic is still
fresh in my mind.)
There may be devices in your house or on your grounds that are
battery-operated, run continuously and may emit RFI.
The batteries
To be on the safe side, wear only cotton clothing; no wool or synthetic
clothes.
Cotton will be least likely to pick-up any charges.
73 Jerry KM3K KX3 #6088
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don
Wilhelm
Sent: Saturday, May 03, 2014
Hello Bill,
The term roofing-filter made sense back in the 1980's when I designed
roofing-filters at 70 MHz.
Bandwidths would be in tens of KHz.
The purpose then was to protect downstream circuitry by rejecting very
strong out-of-band signals that could cause overload; selectivity was not
the
Thank-you, Greg.
Excellent.
Jerry KM3K
_
From: Greg [mailto:a...@cablespeed.com]
Sent: Monday, May 12, 2014 12:52 PM
To: Jack Brindle
Cc: Jerome Sodus; elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3] Roofing filters are misunderstood
http://www.elecraft.com/K3
About #1 below and the wire in the tree with radials off the ground...
I was instantly reminded about Al Brogdon W1AB and his Killer Antenna.
He wrote about it in 2006 in his ARRL book Low Profile Amateur Radio
(Chapter 8 and also pages 44-48) and in QST-July1999.
The Killer Antenna is something
Thank you for this; it is really funny.
73 Jerry KM3K
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bruce
Beford
Sent: Sunday, June 22, 2014 2:49 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] temperature sensors and convert -- now off
Hello,
I bought a KX3 to induce me to learn the code and operate portable.
Randal Evans, who is not a ham, wants RM-11708 approved, so he can use the
ham-bands to download movies.
Imagine that happening where I want to operate CW and PSK31.
Here is Evans' message to the FCC sent in last week:
Hello,
I'm a "no-code-ham" determined to become a "know-code-ham" and so have signed
up to a course by CWops.
They require a paddle for sending practice since lessons will be done at 20-wpm.
Having researched the topic of 'paddles' and from that effort, I think that a
single paddle might
Hello,
The header of my posting is there but the message section is not.
Elecraft digest, Volume164, issue 19
"10. kx3 and single-lever paddle (JEROME SODUS)"
Please re-cycle it as I need to know what to do with my single lever paddle and
the KX3.
TNX
73
__
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Hello,
I want to re-read a post that Wayne n6kr made about a wire-antenna tossed up a
tree and the location of a counterpoise; this was relative to portable
operating a kx2 or kx3, if I recall correctly.
But my archive search has come up empty.
My recollection is he recommended placing the
About Message#15 copied below
Sorry but cutting wires after soldering is "bad practice"; NASA wanted the
soldered connection left undisturbed.
If I ever saw an assembler or tech doing that "bad practice", they'd get a
verbal warning that first time and a written warning if it ever happened
Hello,
Walter K6WRU has written, "I think we take coaxial cable for granted. It was a
brilliant invention and a real gift to people who love radio. Maybe I?ll start
celebrating December 8th as Coaxial Cable Day.
https://www.wired.com/2009/12/1208coaxial-cable-patent/;
Well, Walter, perhaps
Hello,
As the subject-line states, my records show that all was good this past May
when I checked if I was up-to-date firmware-wise.
Also, in September, for the power-up sequence, I successfully used the Utility
to put in a banner with my call-sign.
The idea today was to get DX-Lab and its
Hello,
I want to set-up DX-Lab for two radios, namely my Yaesu FT-950 and the KX3.
No problem with DX-Lab controlling the FT-950.
(I do know that the KX3 has communicated with the KX3-Utility program today, so
that tells me the USB connection works.)
But DX-Lab and the KX3 are not talking
thought I had
done that operation a long time ago but maybe all the MS-updates messed that
up.
Sorry to take up the bandwidth.
73 Jerry KM3K
> On February 22, 2019 at 10:39 PM JEROME SODUS wrote:
>
>
> Hello,
>
> I want to set-up DX-Lab for two radios, name
Hello,
Aren't we really sort of into the metric system already?
In life now, we use these metric termsSeconds, Watts, Amperes, Volts, Liter
(for wine, etc), Lumen (when deciding what light-bulb to buy).
For temperature, it would not be terribly difficult to change to Celsius;
people could
Hello,
For a CW-sending practice session, I'm having trouble setting up the KX3 to
decode my sending.
I know it can be done because I had it working a couple years ago by following
the page 71-72 directions in the book by Fred KE7X (SK) for the KX3.
I'm using the same directions again now.
The
I have it working.
The fix was tapping "DISP" to have VFO-B display "frequency" rather than the
several displays of time, supply-voltage, current-drain, etc.
I'm noting Fred's book accordingly.
73 jerry km3k
> On 08/15/2021 12:22 AM JEROME SODUS wrote:
>
Hello,
Although I have asked some of these questions on another forum, here I have
expanded on them a bit.
When the KX3 transmits a CW-signal, are both I and Q used?
If so, why would that be necessary?
(My guess is only the I is needed.)
Same questions too for a SSB-signal.
But, for any
Hello,
Next month, I have to give a talk about the KX3 to my club...South Mountain
Radio Amateurs club.
To prepare for that, I recently asked here for some information about the KX3's
workings of the I/Q signal paths and am grateful for the replies received.
During my presentation, I'd also
Hello,
I'm scheduled to give, at the August meeting of the South Mountain Radio
Amateurs club, a presentation on the workings of the Elecraft KX3.
I need a readable copy of the KX3's block-diagram for my ppt.
Making a copy of the block-diagram from the on-line manual and blowing it up to
fit
s the one in the schematics not work for you? It's a PDF and let's me
> zoom way in without pixelation.
>
> https://ftp.elecraft.com/KX3/Manuals%20Downloads/KX3SchematicDiagramDec2012.pdf
> --
> Rob Campbell
> KG6HUM
>
>
> On Mon, May 2, 2022, 8:13 AM JER
Hello,
Yesterday, I was re-reading the KX3-manual to prepare for putting into use a
magnetic-loop-antenna.
The KX3 manual, on page 14, has this wording "TUNE is used to put out a CW
signal at the power level selected by the PWR control.".
This is new territory for me as I have never have used
Hello,
My question is about the "TUNE" selection (half second hold of the XMIT button).
The manual's wording is
"TUNE is used to put out a CW signal at the power level selected by the __ PWR
control.".
Normally, "CW" means morse-code.
But, in this instance, am I correct in thinking it
se days. One
> doesn't "learn CW", one "learns Morse code".
>
> Do you have a watt meter between the KX3 and the loop?
>
> 73 de Lee, AA4GA
>
>
>
>
> On Mon, Feb 6, 2023 at 11:14 AM JEROME SODUS mailto:jso...@comcast.net > wr
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