Rick .. you can do this by going to this URL and unsubscribing your self:
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On 6/5/2018 3:36 PM, Rick Chilcote wrote:
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So you're saying that if you select K3 as the rig, and PTT to use CAT,
you get error messages?
FWIW .. FT8 mode DEFINITELY needs CAT control, especially if you're
going to be chasing any DXpeditions as they will be using the Fox &
Hounds mode. It also makes sure that when you send spots to
Read that: I owned Kpa500...
Have a great day,
Bill J
From: Bill Johnson
Sent: Tuesday, June 5, 2018 11:24:08 PM
To: Elecraft Reflector; Roy Morris, Jr.
Subject: Re: [Elecraft] KPA1500 Drive Power
Roy, I owned and will soon have Kpa1500. Yes power will drop if
Roy, I owned and will soon have Kpa1500. Yes power will drop if heat becomes
an issue and you will fault. The amp logs the condition when it faults.
Have a great day,
Bill J
From: elecraft-boun...@mailman.qth.net on
behalf of Roy Morris, Jr. via Elecraft
Gerald...
I can't comment on the relative virtues of the two radios beyond what
you can find on the Sherwood site. I have a K3 with the new synthesizer,
and I am completely satisfied.
That said, there's another factor you won't find on the spec sheets: the
Elecraft company and the community
Just get a weekly delivery of a large container of liquid nitrogen and rig
up a way to spray it on the heatsinks... It can be very quiet, it has a
large temperature difference, so it will be efficient, and it may drive the
chips into superconducting status which will further improve the
Any thoughts on these totally divergent approaches would be greatly appreciated
Kd6et.
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I was looking at GPSDOs about a year ago and settled on a Geppetto Electronics
OH300, I have the OCXO version. It was $289.00 new and with an antenna
attached is truly plug and play with my K3EXREF. With an accuracy of +/-
0.1PPB its actually much better than anyone really needs (+/- 0.1PPM @
I just went back and read the Bodnar specs again, and it does in fact use a
TCXO and NOT an OCXO which is used in most commercial units. My bad. Should
have realized that given its small size. It’s holdover characteristics won’t
be as good as a unit with an ovenized oscillator.
Nonetheless
GPSDO “Holdover” mode (loss of GPS sync) runs typically better than 1x10 (to
the) -9 ppm per day. These devices use the last control values and historical
data to manage the OCXO (or rubidium, or cesium standard) during periods
without GPS sync. They don’t just default to some nominal
I'm not answering for Ed, and I don't have the Ref Lock doodad for my K3.
That said, a decent OCXO, like a Morion, will have, after warm up and a little
aging, stability more than adequate to discipline a K3. The K3 isn't phase
locked to an external reference anyway, it's just "nudged" on
Thought I would try this here first. I bought a KX2 to use with
mobile/potable operating and some backpacking. but my knees and other
changes put a stop to that and have me going in a different direction. So,
I have a KX2, and a hardrock 50-watt amp specifically purchased for the
KX2., both only
Found this in the K3EXREF manual:
"Connect the external 10 MHz signal source to the K3 rear panel REF.
connector. The 10 MHz source
should have a signal level between +4 dBm and +16 dBm, nominal. For
square wave sources, 2VDC to
3.3VDC peak is optimum. If the source is a 5V logic level, use a
Steve,
The K3 still has to go into transmit via either PTT or VOX.
That can happen if you are using the Signalink cable to the 8 pin mic
jack --
However, if you are using the Signalink LINE IN/LINE OUT connections to
the K3 rear panel, you also need to connect the Signalink PTT output to
the
I inadvertently failed to sign my post. Here's the signed version:
Not quite right, for at least two reasons. First, in my post I described the
matter not as a legal issue -- that is to say, not what it is technically legal
to do -- but as a jurisprudential question -- that is, given the
The spec's are in the K3EXREF manual I have dated August 2016,
Rev B. page 4
"Connect the external 10 MHz signal source to the rear panel
REF. connector. The 10 MHz source should have a signal level
between +4 dBm and +16 dBm, nominal. For square wave sources,
2VDC to 3.3VDC peak is optimum.
Here is a copy/paste of the post I made on the VNWA Group for a summary
of the two methods I've seen for setting 36MHz and 10 MHz just for the
record:
Other combinations would require the use of the SilLabs software to
calculate the parameters I have yet to figure out how to use it
Not quite right, for at least two reasons. First, in my post I described the
matter not as a legal qissue -- that is to say, not what it is technically
legal to do -- but as a jurisprudential question -- that is, given the broader
and deeper traditions of American law, what should the
Just curious... Why would you choose NOT to discipline the OXCO?
And I agree wall warts, and indeed ALL switching supplies are the
work of Satan.
I have/am eliminated/ing everyone I can.
I don't have a device with an OXCO yet, but I am powering my TXCO GPSDO
from Bodnar with a VERY
While the Bodnar GPSDO will run off "station power" as long as it sees
less than 14 vdc at the external DC (5.5mm x 2.1mm (+ to center pin)
connector, anything above 5 vdc is dumped as heat into that tiny little
chassis.
It will ALSO run fine (and preferred) at 5 volts DC from EITHER the USB
Noone has responded to my previous inquiry about the KPA1500 power drop-off due
to heat. I would like to know if the KPA1500 power output actually drops off
due to heat build-up or because the SWR display was erroneously showing a power
drop before it was fixed. Thanks, Roy Morris W4WFB
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My Trimble Thunderbolt puts out +7 dBm. The Bodnar can be set for
+13-something down to +7.7 dBm. Sounds in the ballpark.
The Trimble hasn’t torched anything. I don’t recall seeing specs on maximum
input power for the K3 but I haven't looked at it for a while, have a short
memory, and
Probably not a lot other than your transmit and receive frequency NOT
being what is displayed on the VFO display. I'm not a digital guy, but
I suspect that it is perhaps more a concern for those guys.
I like to know that I am transmitting as close as I can to "on-freq", so
if I am receiving
The software COULD be better. I needed 36 MHz and 10 MHz and that
wasn't "available" directly in the software, but with the right manual
parameter settings, you can achieve virtually ANY combination.
I believe Wes, you were the one that clued me in to this fact. as
well as the multiple
Eric,
Joe's link is to the 2-output Bodnar unit I recommended to you in my
private response to you.
AirSpy is the US source for the unit. I would do a price compare with
shipping to see if the unit ex-VAT and Royal Mail from Bodnar or
SDR-Kits is more or less than the US price + shipping
Ted,
I have never received unapproved updates to any of my computators or
phones. I always decide if I want the update, and if and when it can be
applied.
Your own the hardware, you license the software/firmware from the owner.
The owner can make any changes they want without your input.
I have one of Bodnar's units and works well. The software is clunky but
usable. There is a way to set other frequencies than what the pulldown
menus offer. You need to go to and download a copy of the DSPLLsim
utility in order to calculate the correct coefficients..
Below is a set of
Here is a link to the instructions from Signalink:
http://www.tigertronics.com/pgmsetup.htm#WSJT-X
Part of that file says:
WSJT-X
Click File, then click Settings.
In the new window that opens, click the General tab and enter your call in
the My Call text box.
** Click the Radio tab and
I do not use a GPSDO for 10-MHz reference source. Instead I bought a
Russian surplus OCXO from e-bay for $40:
http://www.kl7uw.com/K3EXREF.htm was my beta-tester report
http://www.kl7uw.com/Rubidium.htm more info on OCXO install. I
stopped using a "wall-wart" for 12v supply after discovering
Frankly I agree with Bob-K4TAX:
If you ever have chance to visit the sound booth at either a
broadcast station or recording studio, note the use of acoustic tile.
The Super-Contest station of KL7RA (sk) is lined with acoustic tile
and you note immediately how quiet the room sounds (even with
Gee,
You might try a trick I used on an ICOM 7410. I took an Idiom Press SCAF-1
Tunable Audio Filter and put it between the audio out and my speaker. It
removed most of the annoying hiss and while it may have introduced an issue or
two others might want to avoid, those were unnoticeable to
I feed my K3 speaker output direct to an old ten-inch National Radio
speaker, which simply mounted in a metal speaker box and open on the
back. Like the sound better than new modern speakers (amplified or not).
But I confess to running Western Mountain COMspkr's with my KX3 or my
900-MHz
Apologies for bandwidth, I have tried 4 times to reply to a posting
about "K3S XREF GPSDO recommendation needed" each time trying to change
formatting but the list keeps stripping out the text body. Finally
copied to all that were in the discussion.
I get a copy of what I send and no issues
Steve,
I believe setting VOX on in the software will not work unless you have
VOX turned on in the K3.
You can use PTT via CAT command in the software and leave VOX turned off
in the K3.
Alternately, turn VOX on in the K3 and tell the software that you are
using VOX in the K3.
73,
Don W3FPR
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I’ve been using one in the station for a long time (starting years ago before
the K3 came along). Started with an HP Z3801, and replaced that with an HP
Z3816, when the 3801 went to heaven. I currently use a bit more modern (and
more compact) Trumble Thunderbolt. All of those have worked
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TNX for prompt reply.
As per "Wilhelm Doctrine," VOX is on in software. VOX is off in K3.
73 de W3UEC (Steve)
-Original Message-
From: Don Wilhelm
To: Stephen Dubin ; Elecraft
Sent: Tue, Jun 5, 2018 9:20 am
Subject: Re: [Elecraft] What to check when FT8 won't transmit (K3, Signalink)
Yes, yes and yes. Attenuation is always preferred over boost. This
applies to both receive and transmit.
73
Bob, K4TAX
On 6/5/2018 6:52 AM, Joe Subich, W4TV wrote:
On 2018-06-05 5:21 AM, Bill wrote:
> RX EQ 1 -2
> 2 0
> 3
Steve,
I don't have a quick answer for you, BUT ---
Understand that the TX light on the SignaLink only says that the
SignaLink itself is producing audio.
It detects the audio stream in the box itself and sets its TX light on.
If the K3 TX light does not turn on, then investigate the station
Just to see whether I like it (I didn't), I set up for FT8 with K3, Signalink
and WSJT on Windows 10. I installed Meinberg when I had trouble receiving. I
made a shipload of contacts and decided to go back to CW. Recently my daughter
(KM4UDF) who is recently licensed said, "Aw C'mon Daddy,
I imagine that if enough heat can be removed fast enough KPA1500 would run
key-down forever at 1500 watts output. That is why fan levels 4 and 5 are so
loud, to give those five minutes on (and take five minutes off) without the
amplifier overheating and forcing a hard fault. Hard faults force
I'm using it for other purposes but I have one of these and it's fine.
The only downside is the very clunky software and the sometimes difficulty of
getting the two frequencies out that you might want. For 10MHz only, it's a
piece of cake.
Wes N7WS
On 6/5/2018 4:49 AM, Joe DeVincentis
Newbie question however what is the effect of NOT having the calibration done
on a regular basis?
Thanks in advance!
Michael
KK6RWK
> On Jun 4, 2018, at 4:06 PM, Clay Autery wrote:
>
> I have both the EXREF and a GPSDO, which I plan to start using as soon as I
> make the correct cable.
>
>
I bought one of these similar with the clock and freq displayed. Very handy
clock.
https://www.ebay.com/itm/Latest-10MHZ-SINE-WAVE-Sinewave-GPS-DISCiPLINED-CLOCK-GPSDO-with-LCD-Display-/202153437548?hash=item2f1148a96c
Amateur Radio, KE9UW
From:
On 2018-06-05 5:21 AM, Bill wrote:
> RX EQ 1-2
>2 0
>3+9
>4+12
>5+11
>6+14
>7+7
>8
I have have this one and no complaints:
https://v3.airspy.us/product/lb-gpsdo-1/
73,
Joe, KO8V
> On Jun 5, 2018, at 12:08 AM, eric norris via Elecraft
> wrote:
>
> Dear Gang:
> A shiny new K3S has joined my Elecraft herd, though K3 #2545 is still going
> strong. I have been getting
I received several email requests for my audio settings and speakers.
This is what I am using:
The following are the settings I am using on 40, 75, 160 for armchair
copy (meaning very reduced hiss and no ANF warbling). My RX audio goes
through amplified Behringer MS-40 amplified studio
I would recommend reading the specs. As I remember, it is ICAS, five minutes
on, five minutes off. But you should check for yourself.
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
> On Jun 4, 2018, at 5:06 PM, Paul Baldock wrote:
>
> Can the KPA1500 run brick
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