I, too, built a K1 after I had my K2 for a good while.
Still have the K2, #771, which has been powered on almost continuously
since I built it in 1999. By that measure, it's the World's Most
Experienced Elecraft. I use it every day.
Sold the K1 years ago when I was trying to right size the
Speakers are spoken for, thanks for the offers.
Steve kz1x
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For Sale: matching pair of Motorola HSN6003B external speakers for K3 with
diversity mode. These are the version of the classic Motorola
communications speaker, designed for use on police motorcycles. Besides
being waterproof, which isn't a real need for use with the K3, they have
superior
Item is sold, thanks for the interest.
Steve kz1x
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I have a new, unbuilt W3FPR kit for the K2 which supplies a fixed audio
output level for use with digital modes and related functions. The kit has
all the parts including the custom PCB. I'd like to get $40 for this,
shipped USPS domestic.
Steve KZ1X
I would be remiss, as a Keysight employee, to not mention the option of
going with something like the Keysight model EDUX1052A (available from
numerous vendors such as Mouser) or, if the budget permits and one wants to
do things like sweep filters, have an integrated bench signal generator,
serial
I have a CAD design for a replacement wooden top for the RS-35, -35M, and
VS-35M Astron supplies. This top cover looks exactly like the factory
steel cover, uses the same mounting holes, and even has an exact duplicate
of the vent slots.
The material that worked out best was a HDF board. It can
I worked with WA2EUJ at Hobby PCB to modify that amplifier's firmware so
that my amplifier would connect to my nearly-20-year-old K2 and add
automatic band changes and one-cable interfacing.
The video shown at this URL describes what was done and the results. I am
happy to back this up, as the
:
> Some more of the factory cork pieces between the transformer and case
> fixed mine up – the 50 also.
>
>
>
> Hank
>
> K4HYJ
>
>
>
> *From: *inventor61 .
> *Sent: *Sunday, June 9, 2019 1:48 PM
> *To: *li...@w2irt.net; elecraft@mailman.qth.net
> *Subject
Thanks for the several on and off list replies to the dilemma I was seeing.
The problem turned out to be an edge case failure of the USB serial
converter.
It works fine when DE9 pins 2&3 are strapped (hard loopback) but it doesn't
work with the radio.
Changing to a real UART port solved this
Ingo
I agree, that would be ideal.
The problem, of course, is that if the MCU never gets the TTL equivalent of
the ASCII request, it won't respond.
Hence the issue.
What I had hoped to find out is if there's any keyboard or other sequence
that would cause the K2 to send data autonomously ...
Peter
I now have the prototypes completed of a composite material cover to
replace Astron 35A size power supply covers.
This solves the acoustic noise problem.
The new cover looks terrific and is a 1:1 swap with the old one.
I went through *exactly* the same problem you describe, and then
My K2 #771 has a KIO2 that has no serial data output.
This appears to be due to a problem ... in the other direction.
I can see my inbound ASCII commands (e.g., FA;) at pin 6 of U1 on the KIO2
board.
However, the MAX1406 shows only rail at the corresponding TTL side.
I presume the MAX1406 has
Hello. I am selling off three items I have in my not-in-current-use
inventory.
They might be interesting to many Elecrafters.
Item #1
Peaberry V1 SDR, built by me, mounted in now-unavailable KM5H case. $25
plus shipping.
See web page:
http://ae9rb.com/index.php?main_page=product_info_id=1
Set
Seems like some requests for ballistic tuning have returned to the
reflector after a long quiet spell. Ballistic tuning is what the JA radios
do when you spin their VFO knob faster; it senses the rotation dynamic and
increments the tuning differently until the rotation speed goes 'back' to a
When the amplifier is *off* (from the front panel power control; mains AC
on) what is the function of the A/B switch?
Steve KZ1X
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I was asked several times on private messages for this information.
Note: I am not affiliated with the supplier in any way.
The discussion was for a custom replacement for the 2.9 Ampere-hour gel
cell used in the Elecraft KBT2.
The replacement suggested by me is a rechargeable 4.5 Ampere-hour
Harry
I use the Batteryspace charger recommended for that pack and simply plug it
into the radio.
I had to select the model with the right plug to match the rig.
I flip the battery switch on the K2 'on' for charging. The charger shuts
itself off when done.
No radio alterations or anything else
Harry
Having done the change myself and helping the vendor make the customization
for the K2, I would have to recommend the Batteryspace item CU-J1087-V1.
The "V1" connectorization allows for a drop-in incorporating the back panel
cutoff switch
There's a thread about all this from late August -
My Elecraft rigs are connected to guyed, end-fed half wave vertical
monopole antennas, one each on 30 meters and 40 meters. I use
tapped-L-parallel-C matching networks at the base of these antennas, which
are ground mounted and insulated.
They radiate at the horizon, or darned close to it, and
Is the Noctua fan mentioned in a previous thread a plug-level replacement
for the stock Elecraft K3 fan? That is to say, have others purchased some
version of this fan and successfully drop-in replaced the 'old' one,
experiencing an improvement in sound level or otherwise? My K3 is #6108
...
Gents
Recently I saw some commentary regarding a LiFePO4 pack for the K2.
There is already one made specifically for the application, intended to
replace the gel cell option in the rig and to use the bracket provided for
same. The picture on the web link below is slightly inaccurate in that the
The SoftRock radios are indeed inexpensive and interesting, and can be used
for WSPR and similar.
A better choice, however, could well be the Peaberry V2 replacement, soon
to be available again from Omnia SDR. See the URL:
http://www.omnia-sdr.com/index.php?main_page=index=65
This radio covers
It was pointed out to me that the radio I referred to was not currently
available.
I did say 'soon.';-)
The new kit is to be available in January.
I am unaffiliated with Omnia SDR.
However, I did build three of the Peaberry radios, and still own one of the
original model.
The Omnia folks
I had strongly considered the LiPo type secondary-cell power packaging
option and rejected it.
Energy density in that chemistry/package is amazing of course. But that
equation is also true of a bomb. I have no problem with the LiPo in my
iPad, Galaxy S5 phone, and laptop, so, it's not a blind
I have recently received the LiFePO4 battery pack I ordered for the K2 and
which I mentioned in an earlier posting.
Upon receipt I checked it out mechanically. It looks very nicely made.
The supplied pigtail is terminated with the mating internal K2 Molex DC
connector.
I charged the new pack
Hello
My older K2, #771, is still in use after almost 16 years since I built it.
I have the internal sealed lead-acid gel cell battery option. I have the
charge circuit slightly modified using the kit from ProAudio Engineering,
and I use their superb external power supply as well.
I get great
As an alternative to the Kickstarter project ...
The HobbyPCB RS-UV3 triband FM VHF/UHF building block is also available
(shipping now, no pledge needed), has a really superbly designed RF
section, can operate independently from an Arduino, plugs into an Arduino
as a shield if desired, and has
Hello
Is there now, or will there soon be, a video of this unit in operation?
Thanks
Steve KZ1X
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Based on the feedback I've received:
-- Lots of people are willing to give away their old KSYN3 modules, for
just the shipping costs
-- No one has an immediate application for the devices other than their
original purpose
-- The fear I had that controlling these things was rather complicated
I printed out the schematic of the original K3 synthesizer module. The
diagram says 'rev. A4' and is dated 8 Jan 2010. Hope that's close to the
as-built! (probably is)
This gizmo appears to have an output range from 8.7 to 46 MHz. I don't
know how much sauce it can develop but I have to
Tap '9' when the KXV menu item is displayed.
The same thing happened to me.
Works great now.
K3 # 6108, fw v5.26
Steve KZ1X/4
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I am selling the KXV3A module from my K3 #6108.
I have replaced it with the KXV3B.
I am including the unused accessories included with the new unit,
along with the original printed documentation.
This would be an ideal addition to a K3 that didn't have this interface
before,
and is being
file for the K3,
and the authors are apparently aware of it.
Tnx 73
Steve KZ1X
***
On Jan 9, 2015 12:27 PM, James Bennett w6...@me.com wrote:
Mr. Inventor61 (call??) - I’ve been running my K3 (full K-Line here, too)
with WSJT-X v1.3, r3673 for quite some time with no problems. WSJT-X is
able
I have tried the last two versions of WSJT-X and there seems to be some
problem with the rig control for the K3. I get error messages, something
about the program not being able to read the mode of the radio's second
VFO.
As is often the case, a pretty cryptic error message is what's offered,
AE5X pointed out my fat finger error, with my thanks:
You didn't work Mauritania long-path - you worked Nicaragua (HT5T) short-path!
I clicked the 'exciting' spot, was suitably suspicious, waited, copied
the call right, but hit the Alt-A announce command *before* I fixed my
log entry instead of
I wanted to share a find I hadn't found before ...
There's a (local to me) firm with a web site selling a 16 pack of AA
Panasonic Eneloop NiMH ... with a private 12% off coupon code CPFSAVE12
URL is:
http://www.lightjunction.com/batteries/eneloop/aa-16pk.html?cPath=186_190;
That makes these
Don
As usual, your hint took me directly to the solution.
I had forgotten that the KAT2 doesn't have a true 'bypass' mode.
The problem I had was that the KAT2 had a small amount of stray L or C in
line, on 20 meters.
I solved the problem by switching to the dummy load and 'running' the ATU
Don (and list)
I just replaced my 'back up shack' antenna today (it was a 45/90 OCF
experiment) with a 138' open wire fed doublet. The center is up 50' and
the elements are more-or-less installed. They will get more installed
later.
I used the 'Ladder-Snap' pieces to make the feedline. In 35
Thanks to the several hams who kindly responded with assembly information
for this solar panel charge controller. I now have a complete set of the
instructions and related data, stored in the 'cloud' for future reference
and sharing
For those who are newer to this reflector, Don Brown KD5NDB was
I bought and built two of Don's solar charge controllers (among other handy
things he kitted up) before he went SK.
For some reason, and this is most unlike me, I cannot find the schematic
... or indeed any documentation. It's not in my workshop file cabinet, nor
can I find it from web searches.
1) I would like to have the option for per-band power control, per antenna
jack.
Right now, as far as I can tell, per-band power output is identical whether
you have ANT1 or ANT2 selected.
2) I would like for the KPA500 band buttons to be able to control three
band-stacking registers.
The
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