Bill,
Having spent time, over many years, piecemeal updating Jeppersen and CASA (the
national aviation regulatory authority) pilot documents, I regard it as wasted
time I'll never get back. I hope that Elecraft does not go down this path but
agree absolutely that, these days, good searchable
Martin,
Connecting the SDR to the ANT OUT/ANT IN jacks allows the SDR to see the
enitire spectrum of the K3 antenna below the cutoff of the Low Pass filters.
Thaqt is apt to pick up any responses that are within the range of the
SDR tuning, and if there are spurs coming from your antenna
I've been playing with this sort of setup recently. I have a K3 with a
KXV3 and an SDRPlay RSP1. For my usage I find that theP3 is a better
option and when I want the display on the PC I have the RSP1 connected
to the P3 IF Out and use the software set to accommodate it is working
at a fixed
I don't understand the math behind this. The 50 ohm input Z of the K3
terminates the transmission line. The SDR sees whatever voltage is
across the K3 input. More to the point, why does it matter? In most
real world stations, especially below VHF, noise from the antenna is
sufficiently
Want to own a Elecraft K3 that has most of the "S" upgrades installed
including the 2 Meter Module?
I am the original owner/builder (non smoker) of serial #5785 purchased in
August of 2011 and it includes:
K3 100Watt Upgrade
KAT3 ATU
KTCX03-1 upgraded TCXO Ref Osc.
2.7
On 2019-04-08 4:31 PM, Bob McGraw K4TAX wrote:
> I don't find the input impedance of the SDR Play/RSP1 to be
> anywhere near 50 ohms. In fact it is much higher.Thus the result
> of using a simple BNC "T" does not load the signal of the main
> receiver.
However, since the K3 receiver is
Thank you gents! Now to uppack my KPA500 which came back from support
today...
73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
On 4/8/19 1:31 PM, Bob McGraw K4TAX wrote:
I agree with Joe in the procedure. As to using or
I agree with Joe in the procedure. As to using or the need for a
"splitter", I don't find the input impedance of the SDR Play/RSP1 to be
anywhere near 50 ohms. In fact it is much higher. Thus the result
of using a simple BNC "T" does not load the signal of the main
receiver. If your
Dave,
Look for a post by Bob McGraw.
In brief, it takes a TEE adapter and 2 short pieces of coax. Put the
adapter between the 2 pieces of coax, and then connect one coax to ANT
OUT and the other to ANT IN. The SDR is connected to the TEE adapter.
To get output to the SDR, you must set the
The answer indicated connecting the SDR antenna to some connector in
the rear of the radio, and pressing some number of front panel keys
to route the signals from the antenna to the SDR...
Connect a splitter, input to the RX Ant Out jack, one output to the
RX ANT IN jack and the other output
I don't believe the KAT2 tuning algorithm has changed since day 1, but
Wayne might chime in with a verification.
I have never tried to check the KAT2 firmware version "from the
menus/buttons" If I needed to check it, I would have been in the middle
of a repair, and it is easy to separate the
A few months ago someone asked how to move the antenna signal coming in
on the main antenna connector of a K3 to an external SDR via some
connector in the rear of the K3.
The answer indicated connecting the SDR antenna to some connector in the
rear of the radio, and pressing some number of
Jim,
Before you order the FWKAT2, you should check to see what firmware version is
currently installed in the KAT2.
I don't remember how to check the version number. It has been some time since I
did that and found I had the latest version.
If I remember correctly it is version1.07.
Don
Agreed, the Elecraft PDF's are very good, and I do edit my K3 PDFmanual
with notes. I've never printed it. Since the K3 is an essentially
mature product [I haven't made a FW update in a couple of years ... I'm
not even sure there has been a release in that period], nearly all the
notes I add
Jim,
Certainly, just order and install the latest KAT2 firmware. FWKAT2 on
the website Quick Order form.
73,
Don W3FPR
On 4/8/2019 2:40 PM, James a larkin wrote:
Is there a way to update my KAT2 to the newest Algorithm used in the later
tuners ?
Is there a way to update my KAT2 to the newest Algorithm used in the later
tuners ?
Jim KA2FFP
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Post:
Right on! First, I have over two decades of experience with replacing
printed pages in Air Force Technical Orders. What a PITA, but necessary.
Today, those are distributed electronically and printed locally. Often,
it's not possible to make a change that affects only one page since the
change,
I should have added that the alarm is also available on the PC serial
interface. Interrogating the KPA500 with ^FL; will return the current fault
value in the form ^FLnn; where nn is a 2 digit number indicating the current
fault (00 for no fault).
It would be possible to use this fault report
Ken,
The Internet has created a mob of hyper-sensitive hype-critical keyboard
warriors.
Any comment, including this one is likely to bring on the slings and arrows.
With respect to ham gear, yes, roughly speaking you get what you pay for,
but sometimes marginal performance is much better than no
The alarm signal is available on AUX1 connector pin 7 and is pulled low when
an alarm is active. I have it permanently connected to my data logger and have
used it as a trigger for my storage 'scope. It could be used to drive an
external alarm of any sort that you chose.
73,
Andy k3wyc
To me MFJ is the Harbor Freight of ham radio. When you can't afford the very
best, when you use the gear within (perhaps limited) spec and with a little
TLC, it allows you to scratch an itch you could not otherwise afford. I am glad
they're there. I love Elecraft and will fill my needs there
I'm a blind owner of a KPA500/KAT500 for several years, married to a
TS-590SG.
The alarm that sounds when the amp faults (rarely) is impossible to hear
when wearing headphones.
I've stuck a microphone element near the radio and connected it to the
mixer I use to put radio audio and
I should have added that QEX failed to print the third page of my article
"How to tune an L-network matchbox" until "Letters to the Editor" in the
Jan/Feb 2017 issue. Moreover, my careless dismissing of the low Z case,
|Z|< 50, was corrected by K6JCA in "Letters," Mar/Apr issue. If these QEX
Wayne,
Thanks for the explanation. I should have realized that it might have been
documented.
My question was prompted by the appearance of a question posted to the "ham
radio" formum of Stack Exhange on-line. The OP (original post) of the question
mentioned looking at a 1976 ARRL Handbook
Folks - Let's let this and the related MFJ threads rest for now.
Thread(s) closed.
73,
Eric
Moderator
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Help:
Ideally... yes, practically... no. Given the load impedance and the ideal
impedance, you can always calculate a transfer function that is exact
(simply the path of movement on a Smith chart). However, the question then
becomes how good are your measurements? A high performance line section and
Chuck,
I believe that is quite possible, but requires a more sophisticated
measurement of the transmission line parameters that the Forward power
and reverse power provided by a wattmeter.
Measure the parameters of the transmission line and calculate the
network needed to bring those
Finding a tuner solution need not be an iterative process --- there is a
simple two-step approach if you measure the right parameter as you tune.
See QEX, Nov/Dec 2016, p. 3. Chuck MacCluer w8mqw
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You miss the point entirely. Martin Jue is an American. He is not of a
different nationality or culture. As to your other point, yes, humor
does have victims. The people who have most often been the victims of
much of our humor have decided they don't like it, which is their right
as human
FYI Martin F. Jue is a graduate of Mississippi State University there in
Starkville, MS. He is a ham and a great supporter of ham radio here in the SE.
Most vendors want big turnouts for hamfests and do not consider the smaller
ones for participation. MFJ has always supported our local
If different companies can be valued differently by individuals, why is it
taboo to do so with cultures?
It seems to me that the people that used to say, "I don't like labels," now
slap a label on every person or thought that does not meet their notion of
fashionable memes.
.and to Ken.
My XYL (Sue, N2LBR) was also interested to try this. She was watching
closely as I was doing alpha testing for the KPA1500 firmware, and was
wondering if using the network solution would provide guidance for an
iteration scheme.
Her solution works even if the complex load impedance is not
Until this MFJ flap arose, I took the Mighty Fine Junk name as a form of
humor. I did -not- even remotely realize that this is the owner's
initials. Duhh!
FWIW
73 !
Ken - K0PP
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I am dismayed at the view some took of my posting. I intended absolutely
no racial or eletist content ... in any way ... and apologize to anyone who
read it that way.
73 !
Ken Kopp - K0PP
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I still have the first product MFJ ever put out, a CW audio filter that rang a
little at the narrowest setting, but made my HW7 much easier to use.
Yes, some MFJ products are put together with less skill than some of us more
exacting hams and a few of the MFJ products I have did require a touch
Hi,
it never occurred to me put anything non-E;ecraft to my fully loaded K3
radio.
I smept damn much for my K3 so would it be stupid and risky to waste it by
MFJ or even chinese crap.
-
73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
G+:http://goo.gl/w3u2s9
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