My suggestion would be to try a small, low, horizontal receiving loop. This
seems to be the best option to reject nearby noise sources that propagate
mainly via vertically polarized ground wave. Even normally horizontally
polarized antennas, e.g. dipoles, still have some projection in the
I built my K2 and then a K1 during the solar maximum in 2001/2. One of the
hallmarks of the K2 is it strong signal rejection. It was one of the best
radios of the time and is still among the better radios today. The K1 isn't
really in the same league, but it's no slouch either. The worst
Hi,
I'm looking for a basic O scope for general HF ham use. I figure 2 channels
and 50+ mHz bandwidth. A few years ago I got rid of my old CRT 30mHz scope
figuring I'd get something more modern and compact. I though USB, but I see
full scopes are pretty cheap, $250 and up. I see some
s over
> the network, does all kinds of measurements automatically, even does
> decodes for a variety of serial data types. And it takes up far less
> room on the bench than my old Tek scope.
> I recommend it.
> 73 de W0ZF
>
> On Tue, Dec 8, 2020 at 1:40 PM Louandzip
There's eBay of course, but anything better and more focused on high quality
stuff? I've been out of circulation for a while so don't know what other
options there may be. Not Elecraft, btw, as I'm not ever going to sell my K2,
K1 and related items.
Lou W7HV
>From ESA
http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2020/11/soho_25_years_of_solar_imaging/22352502-1-eng-GB/SOHO_25_years_of_solar_imaging_pillars.jpg
__
Elecraft mailing list
Home:
operators.
I won't spoil the ending, but if you want to see 10M open 24 hrs/day, it is
worth watching.
https://youtu.be/lRNJPkQPo_g
Mike va3mw
On Wed, Dec 2, 2020 at 11:17 AM Louandzip via Elecraft
wrote:
From ESA
http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2020/11
I imagine lying on the roof would usually be fine, except for being a little
lower. At a couple of different QTHs I had my antennas in the attic; 40-10m
dipoles, 6m and 2m loops. These were wood roofs with cedar shakes or asphalt
shingles. They all worked well when the roof was dry. Wet
I haven't given this a lot of thought but:
1. Virtually none. 100W most radiated, leaving very little heating the
ice/snow along your long cold wire. The wire itself won't heat up as it has
very low resistance.
2. IDK about the KXPA100, but Tune is often done at low power, so if 100W work,
I opted for a Rigol DS1202Z-E.
Thanks for all the great input. These scopes are all amazing for the price and
have way more capability than I'll use.
Lou W7HV
On Wednesday, December 9, 2020, 3:38:33 PM MST, Rich NE1EE
wrote:
On 2020-12-09 14:04:-0500, Kevin Cozens wrote:
I
You sound exactly like me 20 years ago. I built a K2 with all the options
including the KPA100 but no KSB2. They weren't all available yet when I built
the K2 but as they became available they were all fun little add on projects,
except the KPA100, which was a bigger fun add-on project. Lots
I have no experience with Friture but it looks like it would work. FWIW,
Spectrogram 16.0.4.0 runs fine on my up-to-date Win10 computer.
Lou W7HV
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help:
I got bad TX hum when I temporarily place my K2 on top of a 35A Astron power
supply. Seemed to be from the transformer's leaked magnetic field and went
away if I lifted the K2 just an inch or two. I'm sure I posted about it in
the reflector, but that was pushing 20 years ago. My call might
Welp, I'm back after about a 17 year hiatus. Dusted off and checked out the
old K1 and it seems to be working gud. I had a question, the old tx offset
issue, but got it sorted using an alternative method. I see they subsequently
modified the circuit and added a switch to the bottom of the
Hey, I'm looking for a chronological list of K2 updates if such a thing
exists. A long while ago I remember somebody having compiled one. I built my
K2 and KPA100 ~20 years ago. Early on, I kept it up to date. I'd like to
figure out what updates I don't have and which I might want to
It's been quite a while since I worked in the biz, but IIRC, UL is a NRTL,
"Nationally Recognized Testing Laboratory." They don't approve devices per se,
but rather certify a device passed statutory safety standard testing. A
certification only means samples and manufacturing process passed
That's not a simple or easy question to answer, especially since there's been
no independent test of a K4, and there are many different criteria that go into
it. That said, I'll go out on a limb and say that in most all practical
situations on the air, it won't be. I say that because I've
Yeah. It's out there in the public eye already, whether legit or not. To
many people, any civilian with a HT is a ham. They don't necessarily make
distinctions between Amateur Radio, CB, GMRS, FRS etc.
Best to cite and enforce existing laws than to create more laws and
restrictions that
There is this:
https://www.connectix.nl/pl2303hxa-phased-out-since-2012-please-contact-your-supplier-solved/
On Sunday, January 17, 2021, 4:46:04 PM MST, Dick Dievendorff
wrote:
This is probably a message from a Windows USB driver install. I don’t recall
adding that text to the K3
>>>The Sony phones are great. I didn't use them with ham radio though. Too
>>>large of a freq response<<<
There're no undesirable frequencies in the audio going to my Sony phones so I
don't need them to do any subsequent filtering. The filtering and shaping of
the audio occurs before the
Minor nit, but the Elecraft PDFs don't have PDF outlines and linked page
numbers and references. I find these very useful in the manuals for my other
rigs (and especially for my car with 900 pages between 3 manuals!). A section
I'm reading might reference another page or section, clicking on
I'm looking at current options for K2 battery operation. I built mine 20 years
ago and never got the internal SLA option. I always used an external battery.
I see the KBAT2 is still available but wonder about some of the newer battery
types; Li-Ion, LiFePO4 etc. I saw LiPO conversion from
big issue is: receiver noise floor, sensitivity and DSP
that does not distort or degrade the incoming signal.
But thank all of you for your input and I truly appreciate all the comments.
Bruce
WW8II
On Tue, Jan 19, 2021 at 10:43 AM Louandzip via Elecraft <
elecraft@mailman.qth.net>
I see it somewhat differently and I don't see it aimed at me. I see a benefit
of FBI/FCC publicly citing the law as a good way to inform the general public
that laws exist and using radios in the furtherance of a crime (ham or
otherwise) is already illegal, and such crimes will be prosecuted.
Certainly don't want to throw away power in wasted heat, but when I turn down
my 200W rig to 5W for QRP, it's still useful and that's 16 dB down.
With ant restrictions, I'm looking at building a small horizontal loop for 6m.
It'd be a little more than 4' in circumference, 16" dia, and the
My MDR-1506 are ~20 years old. Love them. Recently replaced the pads again.
There are many many different ear pads available on Amazon.
On Wednesday, January 13, 2021, 3:51:37 PM MST, JP Douglas
wrote:
I’ve got a Sennheiser headphone as well, they rock!
Also have the Yamaha
What is the native resolution of the K4's 7" TFT and what will it support via
the HDMI output?
On Sunday, January 24, 2021, 10:36:37 PM MST, Mark Goldberg
wrote:
It's not lost on me that it is a 4K resolution image. My Ham shack
monitor is a 43" 4K TV just waiting patiently for a K4
>>> Just another reason why a forum makes so much more sense than pushing out
emails to everyone. Barry W2UP<<<
That would def be my preference. 20 years ago, everything was reflectors, but
Elecraft is the only one I'm dealing with now. Much of the traffic is not
really relevant to me and a
>>> "life changes" ... Bill NY9H<<<
Yep. I would posit that's why forums predominate now. It puts the burden on
the host, not the user and customer.
On Monday, January 4, 2021, 6:53:03 AM MST, Bill Steffey NY9H
wrote:
thunderbird...
I made the change to Thunderbird years ago. I
"Where ignorance is bliss, 'tis folly to be wise." ?
On Sunday, January 3, 2021, 8:13:49 PM MST, Hank via Elecraft
wrote:
Is there a Loudenboomer III??? I must go buy it - I only have a Loundenboomer
II!
> On Jan 3, 2021, at 7:07 PM, Fred Jensen wrote:
>
> Maxwell assured us
the
updates overlap or contradict each other.
Doug, W0UHU.
>
> On 1/3/2021 12:25 PM, Louandzip via Elecraft wrote:
>> Hey,?? I'm looking for a chronological list of K2 updates if such a thing
>> exists.? A long while ago I remember somebody having compiled one.? I built
>> my K2
That's a good point. My knee-jerk response is to go with rechargeable rather
than (horrors!) disposables. Way back, I did a fair amount of portable ops, so
rechargeable made sense. Now, IDK. I'm just getting back into to it. For me,
figuring this stuff out, deciding on an optimal solution,
My gut feel says typical steady indoor condx would be better, but I've had
some rigs in a commercial storage unit for a number of years with no
heating/cooling and CO ambient temps. I'm sure it got significantly over 100F
in there during the summer and likely into the single digits F in the
)
There is a wiring option to select for the K2 as well.
72 de Bryan, k0emt
On Friday, January 29, 2021, 04:36:47 PM EST, Louandzip via Elecraft
wrote:
That's a good point. My knee-jerk response is to go with rechargeable rather
than (horrors!) disposables. Way back, I did a fair amount
In the biz I was in, and the FDA, call this usability and human factors.
On Tuesday, June 8, 2021, 6:50:29 PM MDT, w2xj wrote:
Sounds unwieldily to me.
> On June 8, 2021 8:14 PM Thomas Warren wrote:
>
>
> Speaking of the Sherwood RX list, someone mentioned producing
rig will not key properly with a sideswiper key. Dits merge becoming a
solid dash over 22 wpm...
John K7FD<<<
How does it know you're using a cootie? I exceed 22 wpm with a straight key or
a bug, sometimes operating 35wpm and higher the latter with no probs. Straight
key, cootie,
’m over it; I just use my IC-7610 or RGO One when I use my
cootie :)
John K7FD
> On Jun 9, 2021, at 8:02 AM, Louandzip via Elecraft
> wrote:
>
>
>>>>> rig will not key properly with a sideswiper key. Dits merge becoming a
>>>>> solid dash over 22 wp
I got a nanoVAN V2 PLUS 4 about four months ago. It's been FB. Here's the
site:
https://nanorfe.com/nanovna-v2.html
There are at least 4 or 5 different nanoVNA designs, V2, F2, H, H4, etc.. with
a variety of firmware and software programs and versions floating around
and even more clones
Oops. Those links got run together. If parsed at https they work. sri about
that.
On Sunday, May 9, 2021, 3:22:36 PM MDT, Louandzip via Elecraft
wrote:
Yep. I am working toward adding a panadapter to my K2 using the IF buffer
board from DX Engineering and probably a SDRplay
t;and a good soldering iron can build on a kitchen table - that's a special
>brilliance.
>
>I hope a lot of K2s live on and still get used regularly.
>
>73, Doug -- K0DXV
>
>On 5/9/21 1:40 PM, Louandzip via Elecraft wrote:
>> Totally agree. The last K2 I built it kee
Straight key is one thing. The dit contacts of bugs can be somewhat
sketchy/scratchy. There's very little pressure pushing the contacts together
when they first make. It's a common problem on many rigs with many bugs. One
fix that's been around forever (predates 555 timers and transistors)
Totally agree. The last K2 I built it keeper. It's a FB rig with great
sounding RX that holds up well in tuff cndx. FWIW, it's also happens to be the
first and only K2 I've built. That was in Dec '00 when the the Elecraft
reflector was all builders, homebrewers, experimenters, QRP CW
One thing that's holding me up is doing the research to figure out which mods
I've done and which I should do. Mine is 1818 and I fervently kept up with all
the mods, updates, and tweaks for 3 or 4 years after I built it. You mention
replacing the IF xtals. I know I did that at some point
What's changed since the 19th century is there's way more to be ignorant of
nowadays.
W7HV
On Friday, May 7, 2021, 8:50:33 AM MDT, Grant Youngman
wrote:
Apparently, ignorance hasn’t changed much since the 19th century, and is as
pervasive now as ever 若若 藍
Sent from my iPhone
>
don't have the info
where I got it. IDK, but it is possible that production switched to using the
transreflective type at some point. I'll pm you some pix.
Lou W7HV
On Sunday, May 16, 2021, 8:09:37 AM MDT, David Thompson via Elecraft
wrote:
> On May 16, 2021, at 06:06, Louandzip
If you can't find a kit: I modded my K1 to illuminate the LCD back in '03,
before the mod kit was available. It's pretty easy to do (a white sticker, two
leds, and a resistor) and works very well, but it does require a
transreflective LCD in place of the original reflective one supplied back
.
Physical inspection is the only way I know to do it.
73,
Don W3FPR
On 5/10/2021 8:21 AM, Louandzip via Elecraft wrote:
> One thing that's holding me up is doing the research to figure out which
>mods I've done and which I should do. Mine is 1818 and I fervently kept up
>with all
In years past, we had a spec where 60C was the the hottest temp allowable on
any exposed accessible surface. On a metal surface with high thermal
conductivity and significant thermal mass (e.g. aluminum heat sink), it feels
very warm to the touch, only starts to cause pain after many seconds,
I like the KPA100 as part of the two-box solution with the EC2. Looks like
the EC2 has been retired.
Lou W7HV
On Friday, July 2, 2021, 7:20:50 AM MDT, Frank Krozel
wrote:
I also agree on the KPA100.
One box solution!
-73- Frank KG9H
kg9hfr...@gmail.com
> On Jul 2, 2021,
Yeah. The menu system can be a little daunting, but after using it a bit and
learning the flow it's not that bad. You can print out a flow chart of the
menus to refer to which makes things easier. I also added some notes to mine.
The nanoVNA I have saves 8 sets of calibrations and settings
The passband of the filter has a tilt (the SSB module's filter is much better)
When you switch between CW and CWR, the slope of the filter reverses with
respect to the base band, so it sounds different. It's not that unusual for
other rigs to do this to a lesser degree. Of course where the
I use a clamp on ammeter and a short power cord jumper with the wires
separated where I can clamp over the black wire. That quantitatively tells me
the power being consumed/dissipated. Keep in mind temperature is intensive
whereas heat is extensive.
Lou W7HV
On Wednesday, June 30,
One thing to consider with these (and any) antennas is FCC-19-126A1. A
flagpole in an uncontrolled area like an unfenced front yard or at the edge of
a lot might be problematic.
Lou W7HV
.
On Monday, June 28, 2021, 2:38:23 PM MDT, James Bennett via Elecraft
wrote:
Thanks folks -
I'm a squeezer and use B. It's physically the easiest, particularly at higher
speeds, and I believe B is really most common. Of course you don't have to
squeeze using B.
On Tue, Jul 6, 2021 at 9:11 AM, Tom Doligalski via
Elecraft wrote: I’ve always preferred B, and I do
use squeeze
I count beats. One beat in 1 second and I'm off 1 Hz. One beat in two seconds
and I'm off 1/2 Hz. Easiest done if the side tone and received signal are
adjusted to be close in amplitude and there's little/no QSB. Zero beats, and
the frequencies would be exactly the same, but the practical
HP-35! Hah. Came out my second year in college. $400. The rich kids got them.
That's over $2k in 2021 dollars. I had to keep stroking my slide rule for
another year until the Ti SR50 came out. I waited in line with a bunch of
other nerds at the doors of Macy's (!) when they had a sale on
We called it the OSWO method of inventory control. "Oh S*** We're Out"
W7HV
On Friday, April 30, 2021, 6:48:13 AM MDT, W3FLH wrote:
Joe and the group,
A company I used to do business with had a nickname for JIT supplying.
SOL. They actually had it printed on a card JIT=SOL.
73
Yep, did the mechanical dwgs by hand and taped the artwork for the PCBs for
the first few products I designed at a startup. When I built my K2 in 00/01, I
used a drafting table that had a drafting machine as a work bench and my first
operating desk. I had gotten it from work when they were
Maybe had you known drafting, you wouldn't have had to resort to becoming a
lawyer. HI HI
Lou W7HV
On Sunday, April 25, 2021, 7:28:59 AM MDT, eda...@aya.yale.edu
wrote:
I never took a drafting class nor anything like it in high school, yet its
absence never hurt me professionally.
Fun fact:
The K2's stock SLA 2.9 Ah battery is: 7.0 x 2.36 x 1.38" = 22.8 cubic
inches. 2.3 lb
A KX2 with its internal 2.6 Ah battery is: 5.8 x 2.80 x 1.50" = 24.4 cubic
inches. < 1lb
Without the knobs and some shoehorning, you could just about fit a KX2 with
its 2.6 Ah battery in
The hole in the Heil cartridge might be tiny to help tailor the frequency
response?
On Monday, February 1, 2021, 1:15:21 PM MST, wrote:
I suspect you've discovered Bob Heil's source!
It looks exactly like the HC-5 except the HC-5 has two solder pads
The HC-4 has a tiny hole,
Yeah. I have one of those RS die-cast speakers I've been using since I built
my K2 20 years ago. I use it with other rigs too. I imagine any small
bookshelf speaker would work as well.
Lou W7HV
On Thursday, April 1, 2021, 1:08:43 PM MDT, wa2...@gmail.com
wrote:
I use these on
I'm just happy we got past the TP shortage.
Lou W7HV
On Wednesday, March 31, 2021, 1:14:04 PM MDT, Jim Brown
wrote:
On 3/31/2021 10:34 AM, j...@kk9a.com wrote:
> Most products are still being manufactured and are available.
Not true. We're one of the lucky ones whose home survived
A bit OT, and this is kinda like using a CW decoder, but the Cornell Lab of
Ornithology has an phone app, BirdNet. which listens and will identify birds by
their calls. When started, it displays a waterfall display of sound, you drag
brackets to surround the call in time, submit it, and it
A semantically misunderstanding?
Argument: a coherent series of reasons, statements, or facts intended to
support or establish a point of view.
On 3/15/2021 10:22 AM, Louandzip via Elecraft wrote:
>
I've not presented "arguments," only science.
My OLD Rev A 2002 K2/100 manual shows it on page 56. It'll switch 1A,
+200VDC via an IRF830 (or IRL620) MOSFET to ground. It's on the left middle
of the second page of the schematic.
Lou W7HV
On Tuesday, March 16, 2021, 9:23:15 PM MDT, Mike Cizek W0VTT
wrote:
Hello Eric,
I just ordered it from Rothammel.com. $95 shipped.
Rothammels Antenna Book - DARC Verlag GmbH, 59,00 €
|
|
|
| €59.00 | |
|
|
|
| |
Rothammels Antenna Book - DARC Verlag GmbH, 59,00 €
FIRST EDITION IN ENGLISH! Translated and revised from the 13th German edition
Currently
I guess I'll play the contrarian here. Back in '65 when I first got licensed
I used 1kHz! For a long time I was using 800Hz, but nowadays I like 700 Hz. I
understand the arguments and have unscientifically experimented with lower at
times, including down to 300 or so, but it sounds kinda
Hey. Thanks! That is a big help. I've been following along in the shadows
as I built my K2 in 2000 and have been looking at bringing it up to date. I
kept up with updates number of years but I'm not exactly sure where I am and
where I need to go with it.
Lou W7HV (W7DZN back then)
On
Testing the K4. It's a dirty job, but somebody's got to do it.
On Saturday, February 27, 2021, 9:08:13 AM MST, Wayne Burdick
wrote:
Two things were booming in this morning on my K4D: very loud over
over-the-horizon radar (Chinese? Russian?), and Thailand (E29TGW). I'm pleased
to
Oops. That link didn't work as intended, but it's very easy to drill down on
the McMaster site and find what you need.
Lou W7HV
On Tuesday, April 13, 2021, 8:10:15 PM MDT, Louandzip
wrote:
I usually go to McMaster for specific fasteners not easily found at hardware
stores: Here's
I usually go to McMaster for specific fasteners not easily found at hardware
stores: Here's their 6-32 and 4-40 black oxide flat head philips stainless
machine screws. Of course they have pan head, socket cap, and other styles as
well.
Of course what the material is matters a lot. A 60C piece of wood or plastic
(not good heatsink materials) will feel warm whereas a hunk of aluminum will
feel quite hot due to its much higher thermal conductivity and heat capacity.
On Monday, August 16, 2021, 02:40:37 PM MDT, Lyn Norstad
I don't have one and don't know the what material the housing is made of, but
this adhesive usually does a much better job than epoxy on plastics:
https://www.3m.com/3M/en_US/p/d/b40071871/
I have similar things happen with other items...the long term stress causes the
bosses to eventually
Yep. I worked at an company where we had some boards with very high
impedance circuitry (with the usual guard rings etc.). We tried many things
trying to get wave soldering and aqueous flux to work, but no amount of rinsing
washing got the surface conductivity down to where we needed it .
That's a little odd. Where I've had 220V, I told the electrician the volts,
amps, and type of outlet I wanted appropriate to that voltage and current.
They had nothing to do with and no knowledge of what I would plugging into it,
which could be many things, like an air conditioner, machine
I zip-tied two low speed 60mm muffin fans side-by-side (Globe
D24-B08A-04W3-000), stuck tall rubber feet on the face of the pair and sat them
atop the the K2/100 heat sink blowing down onto it.
Lou W7HV
On Sunday, August 8, 2021, 7:22:18 AM MDT, jerry wrote:
On 2021-08-08 00:08,
A nanoVNA is an incredibly capable, versatile, and inexpensive instrument
(<$100) that can make these measurements when using proper technique and
analysis. They also work great as graphical antenna analyzers.
Lou W7HV
On Friday, October 22, 2021, 05:52:20 AM MDT, John Oppenheimer
I did a backlight on my K1 ~20 years ago that worked out well. The key was
getting a transreflective LCD panel so the light would show through. The
original panel was opaque. Here's a couple of pix:
https://www.dropbox.com/s/pu01s46xylba2se/100_0047.JPG?dl=0
Sounds pretty similar to what I did. The white rectangle in my photo is a
piece of white sticker vinyl stuck to the PCB under the area where the LCD
mounts The two LEDs were sanded down with a Dremel tool and sanding drum to
get the light to diffuse and also to make them small enough to
I use a small wall wart type lead acid battery charger/maintainer as the type
used for moto and lawn equipment. I use a Battery Tender brand charger I got
many years ago. You might check out their line, which starts at $45. Similar
cheaper chargers can be found on line. I've never
Although you can certainly use it just for charging an SLA, one advantage of
these types of chargers is they automatically go into float mode to maintain
the charge and prolong the life of the battery. This is particularly
beneficial for batteries that go fairly long periods of disuse, like
Mine that I built around 20 years ago tunes:
40m 6999.9 - 7088.820m 13994.2 - 14083.4
See page 28 of the manual. The tuning range depends on the value of C2. The
range can be further adjusted by the number and spacing of turns on L1.
It would be a good idea to go through a complete alignment
There is a protected Li-Ion pack for the K2 available. With Lio-Ion, proper
battery management is essential.
https://www.batteryspace.com/custom-lifepo4-18650-battery-12-8v-4500-mah-57-6wh-7a-rate-w-pcb-and-connector.aspx
I briefly looked at putting together a LiFePO4 pack for the K2, but
Oops. That commercial pack is LiFePO4, not Li-Ion. Doh.
W7HV.
On Wednesday, July 21, 2021, 6:38:50 AM MDT, Louandzip
wrote:
There is a protected Li-Ion pack for the K2 available. With Lio-Ion, proper
battery management is essential.
>>>On Wednesday, July 21, 2021, 10:21:30 AM MDT, jerry
wrote: >>>Li-Ion is not hard to manage. With a standard BMS, all you need is a
>>>voltage-regulated and current-limited wall wart - quite routine nowadays.
>>>- Jerry KF6VB
Agree, but the consequences of mismanagement can be
I've been using a CMOS4 with V0 emulation across all my rigs (when in the
shack) for 20 years now. I've always liked it and send better with it than
most other keyers or rig's keyers, though lately some rig's keyers seem very
similar. Does anybody happen to know where I might find details of
was reliable at -15C (5F),
> unlike my Li-ion laptop.)
>
> Low self-discharge.
>
> Voltage compatibility with "12V" systems.
>
> There are probably others.
>
> 73 Bill AE6JV
>
>> On 7/21/21 at 9:31 AM, elecraft@mailman.qth.net (Louandzip via Elecra
Yep. I have accounts with USPS, UPS, and FedEx. The benefits are manifold.
It's very easy to compare shipping methods/rates, generate shipping labels, and
the rates are generally lower. Each have apps and websites were anything
you're shipping or receiving automatically shows up with the
The Antenna Book is really good. I find antenna design and experimentation one
of the more interesting/fun aspects of ham radio and have gotten many of ARRL's
(RSGB, etc) other antenna books over the years: Antenna Compendium 1-8, various
Antenna Classics, stealth antennas, HF Antennas for All
FWIW, the FTdx101 series has among the very best CW bandwidths when set to 8
msec risetime. It beats the Kenwood TS890S by a good margin. I have a 60wpm
spectrum analyzer sweep showing that. It was improved with the May 2021
firmware release which was after ARRL testing. This is a far cry
I built something like that using two 2 pole 4 position wafer switches to
switch between 4 radios. One switch is for the input, and the the other for
the audio output. I also put a 2 pole 2 throw toggle switch in the audio
output to switch between phones and a small audio amplifier driving a
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