From the operating you plan, and having operated many different K-3s,
for
SSB CW I would suggest:
1. The standard 2.7 KHz filter for occasional SSB. As others have
mentioned, the roofing filter is to protect the DSP.
2. A 400 Hz, 8-pole (or 500 Hz-8 pole) filter for general CW operation
(I
Jim K9YC wrote:
On 8/8/2013 6:19 AM, Bob W7AVK wrote:
Most of the recent Hearing Aids have something called T Coil or
similar feature. Very popular in Europe where folks gather like
churches, etc. its essentially an inductive pickup.
Yes, it is, but it has never gained traction in the US,
How about sticking one of these up on your wall:
http://www.arrl.org/graphical-frequency-allocations
It will help you get familiar with where the band edges are, and
before you
know it, knowing when you are in-band will become second nature.
But human beings WILL make mistakes, especially in
My favorite was the Sky King episode where the short wave set was a
National receiver with a microphone plugged into the phone jack.
David K0LUM
The opening sequence of Dr No, the very first Jame Bond movie, shows a
British radio operator using a Eddystone receiver and a KW Viscount
Chuck, W7CS wrote:
I have a space problem similar to yours. I found some used 15
(diagonal measurement) computer monitors that are only 11, or a bit
less, high, if you remove their stand. I figure that my eyes are
still young enough, so that size screen is large enough, if its
directly in
Use a taper reamer to enlarge the four solder holes in the body
of the connector as much as possible. The holes will then be
the diameter of the U-shaped area in the connector body, making
soldering iron contact with the previously tinned braid much easier.
Even better than the reamer is a
The K3 can become many different rigs for different people. The AGC
characteristics are the most configurable of all, so the survey won't be
meaningful without one more key question:
* For what kind of operating?
73 from Ian GM3SEK
-Original Message-
From:
To help make this discussion clearer, there is no problem about
referencing the original article [1]. The author, SM5BSZ, has published
it on his website for everyone to see, because this topic of wideband
noise from transmitters needs to be much more widely known.
On 18/02/2013 20:57, Peter Lambert wrote:
Hello Fred,
I see a very similar thing on my IC-7700. Different frequency spacings but
pretty much as you described.
They're visible on the band scope but that's it. I can't detect any I'll
effect from them. They're so far down to be of no
All the 'plain vanilla' USB1 and USB2 drives that I tried would work with
the pre-beta firmware, but download times varied from 20 seconds up to
almost 50 seconds. The fastest that I tried was a Kingston Data Traveler 8GB
USB2.0. A drive labelled USB3.0 didn't work at all.
If Elecraft can move on
To expand a previous posting:
I can only speak for the cable that was supplied with my own P3, but that
was definitely the cause of spurious signals on the display. The signals
were not strong, but they made it impossible to watch for weak openings on
the 10m and 6m bands.
After cutting away
I never gave a thought to the cable being the culprit - after all, the
cable was supplied by Elecraft. To me that meant it was of high quality.
Disappointing!
To be fair, I am sure that nobody is more disappointed than Elecraft
themselves.
73 from Ian GM3SEK
-Original Message-
From: elecraft-boun...@mailman.qth.net [mailto:elecraft-
boun...@mailman.qth.net] On Behalf Of Arie Kleingeld PA3A
Sent: 03 March 2013 13:02
To: elecraft@mailman.qth.net; w...@ymail.com
Subject: Re: [Elecraft] Buying a KRX3 - Filter selection help needed!
Jast adding
When first assembling the RF output connector and the KANT3/KAT3 board,
I didn't like the idea of using the long standoff pillar as a ground
return for large RF currents. The end of the pillar is actually quite
close to one of the mounting holes of the SO239, so a much shorter
return path can be
The data mode is saved per band so when contesting it's a good idea
when
setting up to run through all the bands making sure the mode is the
same
on each band.
Cheers and 73,
Fred
Agreed - this is a must do for anyone who uses other data sub-modes
outside of contests.
But if you switch to a
I use linking quite a bit, when doing diversity reception; it would
be nice to have it as handy as it currently is...
73 de Dave, W5SV
A manual Link control is not necessary for diversity reception. 'Sync
and link' already happen automatically when entering Diversity mode.
If the manual
If the manual Link control is removed, Diversity would then become
the
easily accessible 'hold' feature of the SUB button (available if the
second receiver is present, otherwise having no effect).
I would love having Diversity become the easily accessible HOLD
feature of
the SUB button, as
In normal diversity reception, the display should show the *true*
VFO B frequency - reassuringly synchronized and slaved to VFO A. It
should only display that alternative frequency if SPLIT has
actually been selected.
Please, NO! One *wants* VFO B visible precisely so the split transmit
I use an old 15 inch 1024 x 768 LCD about six inches further than an
arms length
from my eyes which does a great job.
73,
Tom
Amateur Radio Operator N5GE
Same here - a 15 inch 1024 x 768 LCD, but also with the stand removed so
the screen sits directly on top of the K3. That places the K3 and
I think it would be easily resolved if K3 firmware is changed so that
Inh
signal disables PTT in at the same time.
Many K3s are used with external sequencers which depend on the PTT/Inh
logic remaining exactly as it is now.
A far better place for specialized lockout logic is in a box between
Of the four USB drives tried here, the only one that failed to work was
the newest which was USB3 compatible. Has anyone had success with a USB3
drive?
Even among the drives that did work, there were dramatic differences in
the time needed to copy the screen image, ranging from 45-50 seconds
My previous message on this topic was composed while I was in a
doctor's
office waiting on my fiancee. To gather some data on coax, I did some
Google searching and found several calculators (that all seem to copy
each
other). Another thing they have in common is that they all use the
data I
It's now part of the CW WGHT config menu. Tap 4 to select AUTO OFF.
This turns the VOX off on power-up to prevent keying.
Speaking of power-up, would it be possible to add the facility to run a
user-specified macro automatically at power-up? (As an option, of
course.)
There are many possible
Your question is interesting. If you're in a contest you must be using
a
contest program. Do you want another program running on the PC that
would require you to leave the confines of your contest program? I
think
not.
No, not another program. What's being requested is a standalone function
of
When using the CW in SSB feature [1] my K3 will transmit CW using semi
or full breakin, but not when using manual PTT. The footswitch and the
XMIT button will switch the K3 into transmit, but then the CW keying is
blocked.
Is this a configuration error on my part, or a firmware bug?
[1] In
the use of manual PTT (microphone
button, XMIT button or foot switch) which completely blocks the CW
input.
73 from Ian GM3SEK
-Original Message-
From: Pierfrancesco Caci [mailto:p...@tippete.net]
Sent: 09 May 2013 12:58
To: Ian White
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft
The firmware has no way of distinguishing SSB PTT from CW PTT.
Correct - but (key_down .and. PTT) is unambiguous.
73 from Ian GM3SEK
-Original Message-
From: dse...@dseven.org [mailto:dse...@dseven.org] On Behalf Of iain
macdonnell - N6ML
Sent: 09 May 2013 14:43
To: Ian White
Cc
G3PJT wrote:
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
The Radcom review by Peter Hart is reproduced on Kenwood's UK website:
http://www.kenwood-electronics.co.uk/WebFiles/File/uk/download/Technolo
gies/RadCom_June13-TS990S.pdf
73 from Ian GM3SEK
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Joe, Gary and Joe again:
I agree that an internal preamp (or premps) would be ideal.
However,
in addition to the preamp(s) Elecraft would need to provide
*another*
design for the KXV3A - one that switches the RX ANT IN/OUT
connections to internal jacks - as neither the original KXV3 or
W4TV wrote:
I'm talking about a solution that would switch the RX IN/OUT connection
from the rear panel to board connections on the KXV3B much the same
as
is done for XVTR IN/OUT in the KXV3A. That means one is not dealing
with
the narrow space between the KXV3 and KXV3 connector board and all
That very topic is being discussed today, at:
http://uk.groups.yahoo.com/group/uk-vhf-contesting/
73 from Ian GM3SEK
-Original Message-
From: elecraft-boun...@mailman.qth.net [mailto:elecraft-
boun...@mailman.qth.net] On Behalf Of PETER HUTCHISON
Sent: 10 June 2013 14:58
To:
The OP was asking about substitutes for Deoxit that less expensive and more
readily available in the UK. Following a mild outbreak of intermittent-contact
errors on my own quite early K3, someone recommended Contralube 770 (available
from Maplin, code N73HL). Contralube is a clear gel which
And here's another:
http://www.ifwtech.co.uk/g3sek/in-prac/best-of.htm#0904
Click on April 2009 to download the complete magazine article.
73 from Ian GM3SEK
-Original Message-
From: elecraft-boun...@mailman.qth.net [mailto:elecraft-
boun...@mailman.qth.net] On Behalf Of Svend
73 from Ian GM3SEK
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73 from Ian GM3SEK
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This should be all.
73 from Ian GM3SEK
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Forgive me, but I don't understand why anyone calling in a pileup would
ever wish to use the main RX to tune the pileup, while listening to the
DX station on the 2nd RX.
The K3's Main RX and 2nd RX are identical in performance; but they are
not identical in ease of use. It always takes a few
Like I said.
73 from Ian GM3SEK
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Hi Clive
I had the same good experience with the 1.8kHz Inrad filter in the old
FT-1000MP, so I moved that filter across to the K3 (with a change in
mounting board)... and have not regretted it.
Because the filter has such a restricted bandwidth, I configured the
filter to switch in at a WIDTH
Why not turn it all around? If you use a manual ATU at the base of the
antenna, you could remotely control the TX instead using a cheap
315/433MHz wireless remote (eBay).
73 from Ian GM3SEK
-Original Message-
From: elecraft-boun...@mailman.qth.net [mailto:elecraft-
In a post speaking to the Sherwood chart, it was said, too
many
people jump on one number to rate (rank) equipment and totally
disregard things like ergonomics
(If they didn't the K3 would be at the bottom of
the list).
W4TV replied:
The issue is not lack of curves and swirls or
I have to admit, I find most of this discussion a bit odd.
Why, is the K3 less fun today than it was two years ago? Why do you
expect Elecraft to deliver more radio than you purchased?
Because that is precisely what Elecraft did deliver in the early days of
the K3 - both the fun part and the
It was only a matter of time before fake FTDI RS232-USB adapter chips
began to appear.
http://zeptobars.ru/en/read/FTDI-FT232RL-real-vs-fake-supereal
This fascinating page shows how some anonymous Chinese company has
created a fake FT232RL chip using a mask-programmable microcontroller,
and
Any or all of the above - several people have suggested good ideas.
The strongest possibilities are a loose TMP connector or a multi-way
connector that needs re-seating. Since the faulty connection is right
on the edge between working and not working, even a very gentle tug on
a TMP connector or
Used correctly, THAT symbol is specifically Earth ground. As opposed
to the 'sideways E' (chassis ground) or triangle (signal) ground
symbols.
REPLY:
Just wait till you go to work in the aircraft industry and try to
ground something at 30,000 feet! :-)
73, Bill W6WRT
Taking this one step
That indicates to me that your soundcard ADC is being overdriven, or
that you have a bad soundcard.
73,
Don W3FPR
The sound card could also be overdriven if another unrelated program has
changed the settings.
73 from Ian GM3SEK
-Original Message-
On 7/1/2014 1:02 AM, David Cole
The schematics in the PDF document are completely searchable - right
down to the individual part numbers, named signals and connector pins.
73 from Ian GM3SEK
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For both manual and auto notch, the key seems to be to create two
identical streams of signal data and apply different DSP to each. Stream
1 is totally focused on extracting accurate information about the
interfering tones (frequency, amplitude, phase) regardless of any damage
it may do to the
I would agree with that... but first, there is another point that needs
to be rationalized in the K3 (and, I presume, the KX3 also).
DATA is not a single mode - it is only a folder name for a collection
of different data sub-modes. Many of those sub-modes require quite
different settings for the
It's a sign of growing older, Eric.
I have been happy to offer lifetime support for my PA control boards
since 1999... but as years go by, a small voice inside begins to ask:
Can you be more specific, please?
73 from Ian GM3SEK
www.ifwtech.co.uk/g3sek
-Original Message-
From: Elecraft
George: Not to put too fine a point on it but ZNRs are large and slow
moving
so they do have mechanical aspects but more to the point they do NOT
have
capacitance, save lead capacitance (a few pf),
Not true: MOVs have a self-capacitance on the order of 1000pF, which is
sometimes an advantage.
A rubidium frequency source contains a few milligrams of natural
rubidium, some of which is weakly radioactive.
But there is about 5 times more radioactivity in a banana and about 1000
times more natural radioactivity in the human body itself (in both
cases, mostly due to natural potassium-40).
I agree. There are only two valid reasons for a transceiver refusing to
obey a direct operator command: to avoid physical damage, or to avoid
transmitting illegally out-of-band.
So when the operator presses the SPLIT button, the transceiver should do
as it's told! Every other make of transceiver
The reason for programming a default smart split is to move the TX VFO
*away* from the frequency of the DX station. How far to move? is a
secondary issue.
No single value of frequency offset can be optimum for all modes, but
anything is better than leaving it at zero! As a frequent user of Split
[mailto:n...@elecraft.com]
Sent: 03 October 2014 17:49
To: Joe Subich, W4TV
Cc: Ian White
Subject: Re: Using K3 (or KX3) Macros for custom SPLIT functions
AB twice sets mode B equal to mode A, so what am I missing?
On Oct 3, 2014, at 9:43 AM, Joe Subich, W4TV li...@subich.com
wrote:
That doesn't
I was greatly saddened to hear that Julian G4ILO passed away yesterday,
I suspect that quite a few of us here knew him at least via RF and the
reflector.
And also through his blog, which he bravely started when first diagnosed
with a brain tumor. It will tell you much about the man, and why we
At one time there was mention of making the Split (Hold AB) key
assignable
to a macro. The use of this and the various Toggle macros would free up
the
PF1 and PF2 keys I currently have assigned to Copy Filters/Split/Up1
etc.
Did this ever come to pass?
Nope.
73 from Ian GM3SEK
On a related issue, has anyone located a Windows 7 driver for the
EMU-0202?
73 from Ian GM3SEK
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Post:
Don W3FPR wrote:
A parallel example is my requests that the K2/K3/KX3 keying include
Ultimatic mode. I have been told in the past that it is being
considered, but it has not yet materialized. I do not think of that as
making the K3 internal keyer incomplete - only that other things need
Ed - KL7UW wrote:
The K14 offers six keying modes:
1- Iambic-A
2- Iambic-B
3- Ultimatic
4- straight key
5- Dit priority
6- Dash priority
And others have also identified:
7- Mechanical bug
8- CMOS Superkeyer (Logikeyer)
That list would be a reasonable 'industry-wide benchmark' for the
:44 AM, Ian White wrote:
Ed - KL7UW wrote:
The K14 offers six keying modes:
1- Iambic-A
2- Iambic-B
3- Ultimatic
4- straight key
5- Dit priority
6- Dash priority
And others have also identified:
7- Mechanical bug
8- CMOS Superkeyer (Logikeyer)
That list would be a reasonable 'industry
Actually, the hardest part of installing that change is removing the
KPA3. Once that is accomplished, the rest of the mod is easy - as Vic
said, it is a matter of changing two components.
73,
Don W3FPR
It isn't necessary to remove the KPA3 at all. A $5 pair of long-reach
surgical forceps or
On Mon,12/29/2014 7:35 AM, Joe Subich, W4TV wrote:
I have never seen this but I don't have the SVGA.
Nor have I. Perhaps an RF issue?
73, Jim K9YC
I have the same problem and it does occur in TEST mode so it isn't RF.
It is also a problem of long standing, not related to any recent
firmware
and TX TEST on and send a series of
groups of V's with the internal keyer at 25 wpm: VVV VVV VVV etc. It
seems to happen from once every three groups to once in 8 or so.
Usually
the delays are about 1s. Sometimes they are longer.
On 29 Dec 2014 22:32, Ian White wrote:
On Mon,12/29/2014 7:35 AM, Joe
The OP was more about Phase Noise that is emitted by the Radio.
Here is Wayne's response to the OP.
BTW, Jim's call should be K9YC as Wayne corrected later.
( See W9YC's study of transmit phase noise and keying bandwidth of various
transceivers: http://audiosystemsgroup.com/TXNoise.pdf )
The frequencies of the two receivers in the K3 are locked together for
diversity by sending identical instructions to the two identical
synthesizers which also share the same clock oscillator.
RF phase doesn't need to be coherent for diversity reception as
implemented in the K3, because the two
antennas (eg on HF:
to horz dipoles at right angles to each other).
73, Ed - KL7UW
http://www.kl7uw.com/MAP65.htm
--
From: Ian White gm3...@ifwtech.co.uk
To: 'DaleJ' dal...@mac.com, Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Diversity reception in the K3
Message-ID: 003001d0331d
I know it's true, but I don't see WHY the receivers need to be
phase-locked.
After all, the signals are entirely separate until they are combined in
your
head. There isn't a question of interference/ reinforcement at RF.
Vic 4X6GP/K2VCO
That is correct: the only relevant requirement for
Wayne wrote:
You can't change the behavior of the SPLIT switch itself (that would
bring
our support department to its collective knees), but you can create a
custom
SPLIT macro of arbitrary complexity and assign it any of the K3's 10
programmable function switches.
We have to accept Wayne's
We lost power for a few hours. Looks like I missed a load of fun...
W4TV wrote:
The bedrock point of principle is this: users should *never* be
forced to resort to macros for simple industry-standard features that
ought to be part of the firmware.
Since *when* is a programmable split an
If both RX and TX are using the same synthesizer, TX phase noise
should be lowered.
Not necessarily -- it depends on the design. Some rigs have low phase
noise on RX but not on TX.
The noise that we hear on transmitted signals, or through reciprocal
mixing in our receivers, is always the
It is probably true that Elecraft can never remove any existing feature
without upsetting some existing users... so the way forward would be to
add the new alternatives as *options*.
The point about options is: nobody is compelled to choose them! The
factory defaults would usually need to stay
That's an ingenious workaround, Gary, but you wouldn't need to do that
if the K3 had a programmable 'Smart Split' function like any other
transceiver on the market.
Many people are using custom macros for Split, but at present that macro
has to be assigned to some other button - and guest
W4TV wrote:
If you want to talk
about a new feature set for a new model with a different UI, that's
fine but don't mess with Split
Don't mess with Split is not your call to make, Joe.
even the current basic implementation
is obviously a problem. Overload the control or [optionally] change
Vic try putting the sub rx on the dx and tune with the main vfo. You
won't
need split and the dx is probably not going to move.
If DX holds any of its original meaning of DX = Distant, DX =
Difficult, then listening to the DX station on VFOB is a very bad idea.
Although the K3's two
For how long does the K3 transmit at 50W in the calibration procedure?
If it's just a few seconds, will a 10W dummy load handle it?
Barry W2UP
Probably not, because it transmits at 50W for several seconds on every
band (even those you had 'disabled' from the normal rotation). My load
is 50W
I found it! I went back and saw a bent pin on the KXV3 and took those
boards including IO out and reseated and all is well!
Congratulations, Joe! You now *own* your K3 in a special way that the
factory-built model can never offer.
One of the things we do when building a K3 is to 'train' all
Since I am trying to decide whether to buy another K3 for the 2m
station, this is all very timely.
Probing around using a very small insulated pickup loop and a completely
separate 2m receiver, the 144.416MHz signal is definitely not a spurious
response of the K3's receiver. It is a real carrier
I'm running an older borrowed K3 to get various I/O issues worked out
while awaiting arrival of my K3S. I am interfacing the K3 into an
older tube
amp with large open frame relays for antenna IN and OUT. The maximum
TX DELAY limit of 20 ms on the borrowed K3 is not enough to avoid hot
switching
G4GNX wrote:
Although I'm in the UK and slightly different rules may apply
[...]
You really do need specialist insurance as most ordinary residential
insurance companies just don't understand our special needs and will
attempt to wriggle out of a payout on very flimsy grounds.
There's a story
This links into another problem about data bandwidths: unlike the
specific DATA sub-mode, the associated passband settings are not saved
per-band.
Whenever you select DATA, the stored SHIFT and WIDTH settings will
always be the last settings that were used for *any* data sub-mode on
*any* other
Byron wrote:
For example, listening to a DX operator who is running split.
I would like to hear the DX on the Main, and both Listen and Transmit
on the Sub.
Don replied:
I prefer to tune through the pileup with the big knob and place my
transmit frequency at what I consider a good spot.
7:31
>To: ae...@carolinaheli.com
>Cc: Ian White; elecraft@mailman.qth.net
>Subject: Re: [Elecraft] When is mode A not mode A?
>
>The old LogiKey K3 keyer has 10 emulation modes. I built an AccuKeyer
>way
>back when and still use its emulation on the LogiKey. I would have
said K3
>but t
Hi Stewart
>I am interested as to whether the corrected DSP AGC algorithms will be
>available
>for K3 DSP's.
Your K3 has probably had these DSP changes for some time (assuming you
have kept the firmware reasonably up-to-date). Future firmware releases
will apply equally to both the K3S and the
Apologies once again - this message sent yesterday to G3RXQ was meant to
be copied to the whole group.
--
You are right, Stewart.
Please cancel that whole paragraph about the KIO3B. Apologies to the
group for spreading my confusion worldwide.
73 from
This discussion emphasizes the oft-repeated point that the built-in
keyer firmware (shared by the K3, K3S and KX3) is really rather basic,
lacking many CW features that are present in a $6 Winkeyer chip for
example.
And before someone says "So get a Winkeyer already!" please remember
these three
>The questions might be on the test, but the ANSWERS are wild in the
>world, you know?
>
>Cortland
>KA5S
Thanks - that's a great quote.
73 from Ian GM3SEK
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Dave Hachadorian, K6LL, wrote:
>As a last resort, you can tape pretty much any old electret
>element to the mic boom and run a separate mic line from the
>element. Mouser has a good selection of electret elements, many
>under $5. My CM500 microphone element failed, and I replaced it
>with an
K4TAX wrote:
>Well again we get into conditions which typically manifest into Common
>Mode Current issues. Depending on antenna, I always carry a coax
jumper
>with a bunch, as in 50 to 75, of Ferrite beads of #43 and #73 material.
The most versatile problem-solvers are K9YC's favorite large #31
Another point worth making is that connectors and users "train" each
other, so it all becomes easier with practice.
First-time assembly of multi-pole or TMP connectors may be a little
difficult because of production tolerances. But once the pins have been
successfully aligned with each other,
I found very much the same as Rick did, with a completely different test
setup (SDR-IQ).
The details vary somewhat with frequency and supply voltage but the
three main features reported by Rick remain the same:
>the ten watt PA has worse IMD just before the big PA kicks in, in the
>11-12 watt
craft@mailman.qth.net
>Subject: Re: [Elecraft] K3S IMD Questions
>
>On Tue,9/1/2015 10:44 AM, Ian White wrote:
>> Today, anyone can make 2-tone IMD measurements using a modern SDR
>and a
>> little care in setting up the input levels. The K3 itself provides
the
>>
The Koss SB/45 works well for me too. Unlike the CM-500, it is readily
available in Europe (see Amazon).
For a more lightweight on-ear style of headset, I can still recommend
the Koss CS-100.
As Jim so often says, the K3, K3S and KX3 don't need a "gold-plated"
microphone or headset. They perform
>Don:
>Acetone should NEVER be used in electronic assembles. Acetone
>causes both long and short term effects on various components
>including the PCB. It effects epoxy, lacquers, paints, and plastics,
>particularly polystyrenes
[...]
>73, Fred, AE6QL
Chemicals intended for use around
Existing P3 users who wish to use the USB interface on the KIO3B will also need
to order the CBLP3Y 'Y' adapter cable. This new cable plugs into the RJ45
connector on the KIO3B and also into *both* DE9 connectors on the P3.
Two related questions:
1. Are there any backward-compatibility
Thanks for the very prompt response, Wayne!
[Continued off-list.]
73 from Ian GM3SEK
>-Original Message-
>From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
>Wayne Burdick
>Sent: 12 September 2015 22:12
>To: Ian White
>Cc: 'Elecraft Reflector'
>S
My K3S/100 has gone into an unusual state where the maximum power
available - on any mode, any band - is about 1.5-2W. This is independent
of any PWR setting above 1W, and the PA does not engage at higher PWR
settings.
All this began on Friday afternoon when I switched on the rig. The K3S
had
In the next
>code release I'll add a feature to force the SWR to read 1:1 when
>forward power is close to zero.
>
>Alan N1AL
If no valid result is possible, then "1:1" would be the *worst* possible
choice! Simply blank the display or show "N/A".
Most QRPers understand that primitive SWR
G4DMP wrote:
>I note that the preamp feature within the KXV3B is effective on the 24,
>28 and 50MHz bands (6, 10 & 12 meters). But, is it possible to
>configure it for use with the K144XV internal 2m transverter which uses
>an IF of 28MHz? I thought this might be possible.
>
More gain at the
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