I'm looking for an unbuilt K3EXREF kit. Does anyone have one squirreled
away?
Respond to me direct.
I am on the "would-like-to-have" list at Elecraft.
thanks
73 charlie, k1xx
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Folks,
FYI, there is a resolution to the issue.
A history in short: I started having
issues of localized frequency changes. I
discovered REF CAL would only lock on a
10MHz source if the source was cold and
then only after I rebooted the K3. I tried
two different sources with the same exac
The issue seems to be within the K3,
likely the K3EXREF board? I just tried a
different GPSDO for the 10MHz reference, a
Trimble Thunderbolt. When I first
connected the Thunderbolt I did get a
rapid flashing asterisk.
Satisfied I went on to use the K3. On a
hunch I went back to REF CAL and
Ed,
Thanks for the reply. I do need an
oscilloscope. The only frequency counter
at this QTH is this K3, my K3s is at the
factory for an issue with SSB.
That said, there does appear to be a 10MHz
signal coming from the GPSDO. There's
enough bleed-through that when I tune to
10MHz I can stil
Gary,
Well first thing I would check is whether 10-MHz is present at the K3
EXREF sma jack. If you have a freq counter check for correct
freq. No counter then use a radio that can tune 10-MHz for presence
of signal on correct freq.
Check for adequate reference level (I run 10mw which is mo
I noticed CW stations were a bit off from
the P3 and thought I needed to
re-calibrate the P3 again. I did so and
still encountered issues. I have the
K3EXREF installed and it has been working
fine for some time now with the GPSDO 10
MHz source.
On a hunch I looked at the K3 REF CAL
results
Elecraft recently posted a modification to the K3REF to correct a problem
caused by the K3EXREF. Though specific to frequency changes noticeable on
on 2M and 6M, I suspect it may directly relate to this discussion.
http://www.elecraft.com/K3/mods/K3EXREF%20freq%20shift%20fix.pdf
---
Chuck, AE4CW
Almost.
The TCXO has no control input and is not tuned; it is only measured.
The measurement information is passed to the radio's MCU which then uses
the data to determine the correct value to command the synthesizer(s),
drive the REF CAL display, and so forth.
73,
Lyle KK7P
The K3EXREF ci
Thanks guys for the detailed and thorough replies - I understand it now!!
Andy G4HUE
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The K3EXREF circuit is essentially a AFC (sort of) where a highly
accurate 10-MHz reference is used to measure the frequency of the
TCXO and send a frequency correction "word" to control the TCXO so
that the error from 49.380 MHz is removed.
As I understand it this comparison is done about eve
I believe that is the way it is.
53/1000 of a hertz over an hour?
I'd give that up all day everyday for the spectacular lack of phase
noise in the K3s or K3 with the new synth.
It's not a cesium clock.
On 3/7/2016 8:02 AM, David Anderson wrote:
I -think- the way it works is that when the K3EXR
I -think- the way it works is that when the K3EXREF is locked with the external
frequency standard on 10 MHz, this is used to measure the frequency of the
TCXO. The value of that frequency measurement is then put into the K3 REFCAL
setting. If the TCXO drifts slightly as they all will, then the
Andy - Without the K3EXREF connected, the REF CAL frequency will be
fixed and the K3 will drift, albeit very slightly, particularly when it
is first switched on. With K3EXREF locked with your 10MHz standard the
REF CAL frequency will vary to correct any drift in the K3. If you
measure the output f
Hi Andy,
I have the same (hardware) constellation and get similar results.
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___
Sometime ago I installed the K3EXREF which I feed from an external 10MHz double
oven Xtal oscillator. I am confident the K3EXREF is installed and configured
correctly as when in use and the external oscillator is connected the front
panel says REF*CAL with the * blinking. Attempting to change th
Sometime ago I installed the K3EXREF which I feed from an external 10MHz double
oven Xtal oscillator. I am confident the K3EXREF is installed and configured
correctly as when in use and the external oscillator is connected the front
panel says REF*CAL with the * blinking. Attempting to change th
Hi Tighe:
Tnx for the info. Once we get spring or summer I will move my active antenna up
higher so it can get a pretty good shot of the sky. If I had left the antenna
where it was it would be under snow by now. I was amazed how fast the unit
locked onto Satellites and it worked like a charm. I
Mike,
I'm planning to leave it on continuously although I did tap "1" to save
the setting at what my final fully warmed up state should be. I bought
an active GPS antenna which I have sitting in a windowsill and it seems
to have a good GPS lock. I have to try pretty hard to get it to loose
G
Wow! Great tip -- totally forgot the "tap" "2" step.
My EXREF had quit some time ago and checking 10-MHz sources all
tested good so I figured my "beta test" unit had given it up. Too
busy to investigate further.
It stopped after I had a firmware glitch so now guessing that shut
off the EXRE
Tighe:
Glad you got it working. Mine also works like a charm. I did the calibration on
both my K3's and then since I had the GPS Antenna on a stick shoved into the
snowbank, I made it a temp setup. Question, are you leaving the Calibration on
all the time or just use it once in a while. I am thi
Thanks to everyone that responded. I looked at that errata several
times and for some reason had blinders on to the big obvious section in
the middle of the page which deals with enabling the module. That's
what I get for working on it in the middle of the night.
All good now.
73, Tighe NK4
Yes, you could be missing something, Tighe.
There is an addendum to Page 4 which reads:
After installing the K3EXREF module, you must enable it in the K3 menu
before it can be used if your K3 is equipped with MCU firmware 4.57 or
later.
Enable the K3EXREF module as follows:
* Turn the K3 on. Con
Have you gone to Config: Ref Cal and tapped 2 to enable XREF IN ?
See page 63 of the manual.
73 from David GM4JJJ
> On 28 Feb 2016, at 05:31, Tighe Kuykendall wrote:
>
> I picked up the Leo Bodnar frequency reference and a K3EXREF board after
> reading a couple of threads here. I Installed t
I picked up the Leo Bodnar frequency reference and a K3EXREF board after
reading a couple of threads here. I Installed the board according to
instructions, took static precautions, am using a known good cable from
the K3 to said reference. I can clearly hear the 10MHz tone on my K3
when I tun
Speaking of using a GPSDO, I have a quick question...
I use a program called SBSpectrum, it shows frequency changes less than
one Hz.
I note that the K3, does frequency correction in small sawtooth steps of
about 1/4 to 1 Hz, across a few seconds of time, repeatedly... It is as
if some thresho
Hi Chuck:
I tired sending you an email direct, but it bounced for some reason. Yes I am
now aware of the product from Force-12, actually it comes from Leo Bodnar in
the U.K. Very nice unit and probably the way to go. Tnx.
73 De Mike
VE3YF
http://www.ve3yf.com
[http://www.ve3yf.com/]
Hi Wes:
Actually for what it is worth, the board inside are Trimble Boards with a
Trimble oven. I have also corresponded with Leo on his 2 GPSDO units. I like
the fact that he says I will have no problem using the unit with both of my
K3's. Tnx Wes
73 De Mike
VE3YF
http://www.ve3yf.com
[http
-Original Message-
From: Mike VE3YF [mailto:m...@ve3yf.com]
Sent: Sunday, December 20, 2015 01:43
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3EXREF Ext. Frequency Reference Input
Hi:
Has anyone used or had experience using the K3EXREF with this item as the 10Mhz
source:
Trimble GPS
No experience with that model but much information is available on line. I
bought the BG7TBL version and a distribution amplifier. The Lady Heather
software said it was accurate over several days to the 12th power...way beyond
what I need. I use the output for my HP frequency counter and the
No experience with any of them here (yet). Looks like a Chinese knockoff with
the Trimble name on it. Might be perfectly okay but I wouldn't buy it for that
reason.
I've looked into buying, put haven't pulled the trigger yet*, one of these:
http://www.leobodnar.com/shop/index.php?main_page=p
Hi:
Has anyone used or had experience using the K3EXREF with this item as the 10Mhz
source:
Trimble GPS Receiver GPSDO 10MHz 1PPS GPS Disciplined Clock with RS232 Port
http://www.ebay.com/itm/Trimble-GPS-Receiver-GPSDO-10MHz-1PPS-GPS-Disciplined-Clock-with-rs232-port-/252162780444?hash=item3ab6
Hi,
Anyone got one of external reference boards (K3EXREF) that is no longer
required?
If so, let me know how much and approximate shipping cost to UK.
Thanks, Peter G4URT
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With all of this talk of synthesizer upgrades, if you are considering
adding a K3EXREF while your K3 is open, this is a shameless plug for a very
nice Trimble Thunderbolt 10 MHz precision source plug-and-play "appliance"
that I have posted on QTH. Thank you.
73,
geo - n4ua
___
I just installed the K3EXREF option and followed the step-by-step
instructions. I'm feeding it with a +10dbm level from my HP Z3801
disciplined, 10MHz reference. The K3 doesn't appear to be locked. The
Installation and Operation manual says that "LOCKED will appear if you try
to adjust the VFO
Don't you guys have anything better to do than nit pick over a
negligible warm up drift. I don't think that you will be planning to
do any ARRL Frequency Measurement Tests, within the first 10 minutes
of your K3 turn on !
I have bought several 10 MHz DOUBLE Oven Controlled Crystal
Oscillator
Maybe my concept is wrong but I do not see the need to leave a GPSDO on. Once
the GPSDO locks to the satellite it is all that is required. I have decent sky
view and it locks up using multiple satellites quite quickly. So before the K3
has warmed up the GPSDO has locked and I'm locked to it.
T
lf an hour or so and want to check the
calibration.
73
Geoff
G3UCK
-Original Message-
From: Edward R Cole
Sent: Tuesday, October 14, 2014 10:47 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3EXREF Query
David,
10w is 7.3 kwH/month. I would doubt that is a large expense,
Look at
cell phone chargers where the light switchers are used instead of the heavy
wall wort linear supplies. You thought it was to save weight?
73
Fred, AE6QL
-Original Message-
>From: Edward R Cole
>Sent: Oct 15, 2014 9:29 AM
>To: Elecraft@mailman.qth.net
>Subject:
Ed,
I spent a lot of time over the past few years looking at this exact
problem. It becomes interesting if your power company charges tiered
rates and baseline is under a dime, while 300% and over is nearly $0.50.
The government's EnergyStar program did not initially look at standby
power,
offee pot hot. And that only ruins the coffee. We just
reheat a cup in the microwave when we want hot coffee. Do we save
any power this way?? But the coffee tastes better :-)
73, Ed
---
From: "Lynn W. Taylor, WB6UUT"
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft
GPSDO and plan to leave it on all the time.
As for the expenseto me the expense is minimal.
From: Mike Harris
To: elecraft@mailman.qth.net
Sent: Tuesday, October 14, 2014 10:35 AM
Subject: Re: [Elecraft] K3EXREF Query
Why not just leave the frequency reference switched on
oscillator is a thermostatically
controlled heating device. Nuff sed! :-)
73,
Alan. G4GNX
-Original Message- From: Edward R Cole
Sent: Tuesday, October 14, 2014 10:47 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3EXREF Query
David,
10w is 7.3 kwH/month. I would doubt that is
stable crystal oscillator is a thermostatically
controlled heating device. Nuff sed! :-)
73,
Alan. G4GNX
-Original Message-
From: Edward R Cole
Sent: Tuesday, October 14, 2014 10:47 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3EXREF Query
David,
10w is 7.3 kwH/month. I
On 10/14/2014 2:47 PM, Edward R Cole wrote:
Leave your TV plugged in but turned off and it still consumes about 50w.
You need to buy a new TV. The new ones are under a half-watt when
plugged in but turned off.
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routine frequency checks. The rb is
only +/- 5 E-11 so not as good as GPS but good enough for my use.
73, Ed - KL7UW
-
From: David G4DMP
To: Mike Harris
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3EXREF Query
Message-ID:
Content-Type: text/plain;charset=us-ascii
About
About 10W for the MV89A double oven CXO, when run from a linear 12V
power supply. NOT trivial at today's prices for electricity in Great
Britain.
73 de David G4DMP
In a recent message, Mike Harris writes
>Why not just leave the frequency reference switched on. OK with a
>TCXO, not so good with
Why not just leave the frequency reference switched on. OK with a TCXO,
not so good with a Rubidium standard. Power consumption must be trivial
compared with the normal domestic base load.
Regards,
Mike VP8NO
On 14/10/2014 10:41, David G4DMP wrote:
I have not seen any replies to this, Bria
I have not seen any replies to this, Brian.
As I see it, the only way out is to go into REF CAL from the Config menu
and then press 2 to disable XREF until the frequency standard has
locked.
Like you, I have found that if XREF is enabled when the K3 is switched
on, the K3 drifts unacceptably for
I was wondering if there is any kind of "sensibility" check done on the
input reference?
For example, I've been fooling around with a double oven controlled XO.
Starting from cold it is > 200Hz off. It takes ten minutes or so to be
within 10 Hz. It gets into the tenths of Hz accuracy region i
I was one of the beta testers on the K3EXREF. I am using a surplus
OCXO bought for about $45 on e-bay. Its output was a distorted
sinewave (appears to have strong second harmonic). I removed the
harmonic by running the 10-MHz thru a DEMI model 10-4 distribution
amp that uses 10-MHz bandpass
Small correction below.
On Wed, 08 Jan 2014 08:21:37 -0800, you wrote:
>If Howard is correct on the output level, it's a little low for the
>K3EXREF's input. From the manual:
>
Quote
>Connect the external 10 MHz signal source to the K3 rear panel REF.
>connector. The 10 MHz source should have a
If Howard is correct on the output level, it's a little low for the
K3EXREF's input. From the 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
This is an inquiry I sent to Elecraft, along with their response:
I’ve been considering adding the K3XREF to my K3. Can you tell me if the device
listed in this link is a suitable 10MHz source? (Re: Navsync CW12-TIM GPS
Timing Module. Price and technical details at the link:)
http://www.semicon
>>> Upon further reading, the corrections of this module appear to be in ~1Hz
>>>steps.
>>> I was more interested in something that disciplines the oscillator in a
>>>finer more continuous way.
I have a K3EXREF on order from Aptos, as well as a Trimble Thunderbolt coming
via E-Bay.
The Trimb
Thanks guys for the suggestions.
To appreciate the problem one needs to look at Fig's 7 and 9 in the
K3EXREF manual. There is no room for tools. Nor do I think any kind of
gop is a good idea. (Though if this screw were necessary for grounding
I don't think they would have used a split washe
mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Geoffrey
Mackenzie-Kennedy
Sent: Sunday, July 21, 2013 8:53 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3EXREF query
The most useful tool, which I have found for this type of application, is
the simple screw "Grabber"
I've used a little bit of coax seal too many times to count. Stick a bit in
the screwdriver tip and it will hold the screw very well.Used t recently
re-building a T-8 Tennadyne Log Periodic with lots of difficult to access
areas. Didn't drop a one (and they would have gone into the boom and been
to
The most useful tool, which I have found for this type of application, is
the simple screw "Grabber". Not only can this tool be used to hold a screw
and washer(s) while starting the thread, but also while removing a screw and
washers. It can also be used to retrieve bits of wire, screws, washe
er
>available openings instead of the REF connector opening.
>
>73, Ron AC7AC
>
>
>-Original Message-
>From: elecraft-boun...@mailman.qth.net
>[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian Alsop
>Sent: Saturday, July 20, 2013 8:42 AM
>To: elecra
tead of the REF connector opening.
73, Ron AC7AC
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian Alsop
Sent: Saturday, July 20, 2013 8:42 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3EXREF query
Anybody install with
Anybody install with with the subrx in place?
My recollection is that the installing the screw with the lockwasher on
the panel side of the master oscillator PCB was a bit tricky.
Also the extra hole for the SMA connector is already in use here for
something else.
I'm wondering if there is
Hi Group,
I wanted to post my experience with the addition of the K3EXREF in my K3. First
off, took me around 30 minutes to install, everything went smooth. Very nice
addition to my K3! I run a OCXO 10 MHz reference into the module and working
just as I hoped it would. When turning the radio on
...@mailman.qth.net] On Behalf Of chas
Sent: Thursday, December 13, 2012 9:12 AM
To: Elecraft Reflector
Subject: [Elecraft] K3EXREF
I just installed the K3EXREF and now I get the error message on boot up that
says ERR PL1 What Have I done wrong?
Chas - M0BIN
I just installed the K3EXREF and now I get the error message on boot up
that says ERR PL1
What Have I done wrong?
Chas - M0BIN
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You do not need the TCXO in order to have the external reference. I've got
my radio setup in this manner.
~Brett (N7MG)
On Mon, Oct 22, 2012 at 10:41 AM, John D'Ausilio wrote:
> Do I need k3tcxo3 to be able to use k3exref?
>
> Either I'll have a good 10MHz source, or I won't be doing things tha
Matt Zilmer wrote
> I would go without it until you get the basic radio together, just the
> same. "Should not" isn't that same as "won't".
Good advice. Since I will be installing the KRX3 and KPA3 after basic
testing and calibration anyway, I'll be prudent and install the K3EXREF
then.
Thanks f
If the K3EXREF is left unconnected to an external frequency reference,
it should not affect any calibrations. If it is connected to a ref
oscillator, it would affect your reference freq calibration - in that
you wouldn't really need to do it at all.
I would go without it until you get the basic r
I'm building my second K3 with the K3EXREF option and I wonder if anyone can
tell me if it would be a problem to install the K3EXREF during initial
construction, at the same time as the KREF3. Would it affect initial
testing and/or calibration?
Thanks,
-
73, Stan - KR7C
--
View this messag
The 3816 has been sold. Thanks.
Bill, WA4KBD
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The text of my last post apparently didn't make it to the reflector, so I'm
trying again.
If anyone on the list is interested in purchasing my HP Z3816A GPS receiver
for use with K3EXREF and/or as a lab standard, I have all the details posted on
my website at:
www dot wa4kbd dot net/HP3816A d
That's great, Dave, my K3EXREF and K144RFLK work well too. However, my
understanding is that the K3 firmware does not currently contain a
method to automatically update the XVn transverter offset values as
REFCAL adjusts with the external 10 MHz reference. That is what I was
told in March and I do
...@g4fre.com]
Sent: Friday, May 27, 2011 6:06 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3EXREF Shipping Date?
I also got the same reply from Vicki at elecraft on 5/17 that it would be
shipped "next week" ie the week now ending.
Having not received the despatch notice I ca
Thank you, Jim, and yes, I can confirm that I am getting the phenomenon.
I can't say that I had come across the problem previously. In fact it's
quite a useful feature in that it reinforces the fact that the K3 is
locked even when looking at other Config Tech settings. In some ways, I
hope that El
David,
The exact conditions the anomaly occurs under are: Tech mode ON, external
reference 10 MHz signal connected and operating, go to MENU CONFIG, REF CAL
(only available with tech mode on) and watch for the blinking asterisk. If it
is NOT blinking, the problem won't appear. While the aster
I am still unable to reproduce the anomaly here, Brett, Igor and others.
I am using the latest firmware and have tried both sinusoidal and TTL
reference inputs.
73 de David G4DMP
In a recent message, Brett Howard wrote ...
>
>This was a known bug that was found in field test. I submitted it to
h.net] On Behalf Of Jim Sheldon
> Sent: Tuesday, May 31, 2011 12:57 PM
> To: Elecraft Mailing List
> Subject: [Elecraft] K3EXREF
>
> Tracking number I got from Lisa says it is supposed to be here today. Mail
> man should be here in a few minutes, so, following the instructions i
-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Sheldon
Sent: Tuesday, May 31, 2011 12:57 PM
To: Elecraft Mailing List
Subject: [Elecraft] K3EXREF
Tracking number I got from Lisa says it is supposed to be here today. Mail
man should be here in
Brendan also caught this...
matt
On Tue, 31 May 2011 19:19:20 +0100, you wrote:
>I am unable to reproduce the anomaly here, Jim. I have checked ALARM,
>MIC+LIN and ANTIVOX and all the characters are perfectly steady.
>[Firmware: 4.36, DSP 2.14, FL 1.14]
>
>73 de David G4DMP
>
>In a recent mess
I am unable to reproduce the anomaly here, Jim. I have checked ALARM,
MIC+LIN and ANTIVOX and all the characters are perfectly steady.
[Firmware: 4.36, DSP 2.14, FL 1.14]
73 de David G4DMP
In a recent message, Jim Sheldon writes
>I did notice one anomaly. Once the * symbol started flashing, m
Tracking number I got from Lisa says it is supposed to be here today. Mail man
should be here in a few minutes, so, following the instructions in the
downloadable manual, I have the K3 opened up and ready to do the install. The
hardest part of the whole thing will be re-installing that split l
I picked mine up at Dayton. I am looking forward to testing it.
Mike
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_
quot;
Dave
ww2r
--
Message: 3
Date: Thu, 26 May 2011 09:26:28 -0700
From: "Eric Swartz - WA6HHQ, Elecraft" <[hidden email]>
Subject: Re: [Elecraft] K3EXREF Shipping Date?
To: Jim Sheldon <[hidden email]>
Cc: Elecraft Mailing List <[hidden email]>
Message-ID: <
y"
Dave
ww2r
--
Message: 3
Date: Thu, 26 May 2011 09:26:28 -0700
From: "Eric Swartz - WA6HHQ, Elecraft"
Subject: Re: [Elecraft] K3EXREF Shipping Date?
To: Jim Sheldon
Cc: Elecraft Mailing List
Message-ID: <4dde7f34.10...@elecraft.com>
Content-
I have found that the best way to make enquiries about orders from Elecraft is
to call or email Elecraft.
73,
Tom
Amateur Radio Operator N5GE
On Thu, 26 May 2011 12:49:43 -0400, bruce.bef...@myfairpoint.net wrote:
>I ordered one early last week (as part of another order) and was told by sales
My arrived a few days ago. So they are being shipped.
Sent from my iPhone
On May 26, 2011, at 11:49 AM, bruce.bef...@myfairpoint.net wrote:
> I ordered one early last week (as part of another order) and was told by
> sales they would not be ready for shipment until this week. I have not yet
>
I ordered one early last week (as part of another order) and was told by sales
they would not be ready for shipment until this week. I have not yet received
the order, or a shipment notice. I'm sure it will be along, just wanted to
mention what I was told about the external reference kit availab
Its been shipping for a week or two.
73, Eric
On 5/26/2011 9:03 AM, Jim Sheldon wrote:
> The ship date on the external reference board ought to be getting close.
> I've already ordered mine, just wondering how much longer till they are out
> the door?
>
> Jim - W0EB
>
The ship date on the external reference board ought to be getting close. I've
already ordered mine, just wondering how much longer till they are out the door?
Jim - W0EB
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The K3EXREF 10 MHz Reference Input for the K3 is now up on the order
form at:
http://www.elecraft.com/elecraft_prod_list.htm#exref
This also includes a link to the manual.
73, Eric WA6HHQ
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I thought the K3EXREF would be up on the website this week, anyone out there
got any updated info? Thank you in advance.
K6CG
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Approximately 2-3 weeks. Its in production right now.
I'll have it up on the web site for ordering within a week.
73, Eric
On 4/26/2011 10:32 AM, Richard Thorpe wrote:
> Is there any word out there in Elecraft land as to when the K3EXREF will be
> available? Thanks.
>
> K6CG
>
Is there any word out there in Elecraft land as to when the K3EXREF will be
available? Thanks.
K6CG
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made-up cables with whatever mix of
connectos you wish (try Googling assembled coax cables; or search e-bay).
Message: 12
Date: Sat, 16 Apr 2011 10:56:19 -0500
From: Jim Sheldon
Subject: [Elecraft] K3EXREF
To: Elecraft Mailing List
And if you want to save about $50, there are several OCXO on e-bay
for $40-50 (with many offering free shipping). All you do is hook
them to 12vdc and coax to the K3EXREF, as most run at +10 dBm. The
waveform may not be a perfect sine wave.
--and no satellites were harmed in locking your K3!
dmp.fsnet.co.uk]
> Sent: Saturday, April 16, 2011 10:21 AM
> To: Ron D'Eau Claire
> Cc: 'Julian, G4ILO'; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3EXREF Questions
>
> Ron - Shouldn't the asterisk be blinking if the K3 is being controlled
> by and
et.co.uk]
Sent: Saturday, April 16, 2011 10:21 AM
To: Ron D'Eau Claire
Cc: 'Julian, G4ILO'; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3EXREF Questions
Ron - Shouldn't the asterisk be blinking if the K3 is being controlled
by and external reference? The presence of an asterisk m
"
To: "Ron D'Eau Claire"
Cc: "'Julian, G4ILO'" ;
Sent: Saturday, April 16, 2011 1:21 PM
Subject: Re: [Elecraft] K3EXREF Questions
> Ron - Shouldn't the asterisk be blinking if the K3 is being controlled
> by and external reference? The presen
Ron - Shouldn't the asterisk be blinking if the K3 is being controlled
by and external reference? The presence of an asterisk merely indicates
that it has at some time been controlled by a reference since the last
power-up.
73 de David G4DMP
In a recent message, Ron D'Eau Claire writes
>
>I can
> I can make or obtain an SMA-SMA cable or if the K3EXREF input is a BNC,
> cables are already on hand for that.
The kit includes an SMA panel jack with completed ends. A SMA-to-BNC
between-series adapter is included. I found a piece of RG-316 (RG-174 but
with a Teflon jacket) with a male SMA
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