[Elecraft] K3XREF

2022-12-14 Thread Phil Hystad via Elecraft
Is the K3XREF, external clock interface, still offered as a product?

I searched Elecraft but could not find any references to it.

73, phil, K7PEH


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Re: [Elecraft] [K3XREF] Is not synchronizing

2016-04-30 Thread Gary Smith
Hello Harald,

It is probably best to repost this report to the list as there are 
many there far more knowledgeable about the K3 and what to expect, 
than me on it. With that, I am sending your reply directly to the 
list along with my reply to you.

When I press Rev, I get no flashing XREV IN, it simply says XREV IN 
and then disappears after maybe one second. At that time it returns 
to REF CAL and within moments the asterisk is flashing. As I recall, 
initially it took a bit longer for the asterisk to appear, but it did 
and then it took some time for the REF CAL numerical readout to 
stabilize. Once stabilized I pushed A/B to save that value in memory.

Write down your REF CAL number and then when you feel you have done 
all the right things, slowly turn VFO A and if you are locked in with 
the 10 MHz source, the letters REF CAL will be replaced with LOCKED. 
If this does not happen, return to the number you wrote down to 
return to where you were.

Is it possible you do not have a working 10 MHz source? 

Is it possible either the connector or coax is not completing the 
connection?

Is it possible the pins are not lined up properly in the K3XREF?

At this point, I have no other ideas to help you, hopefully someone 
else can offer more.

73 & good luck,

Gary
KA1J
 

> Hello Gary,
> your assumption is correct. REV is pressed so that XREF IN is 
> flashing.
>  
> But asterisk is not appearing :-(
>  
> vy73
> Harald
> DD0VS
>   
> Gesendet: Freitag, 29. April 2016 um 22:57 Uhr
> Von: "Gary Smith" <g...@ka1j.com>
> An: Elecraft@mailman.qth.net
> Betreff: Re: [Elecraft] [K3XREF] Is not synchronizing
> Assuming you
> 
> 1. Have tech MD set as ON.
> 
> 2. Are on REF CAL and waiting to see the flashing asterisk and not
> seeing it:
> 
> Then push the REV (2) button to be sure the k3xref is engaged.
> 
> I'm guessing you might have missed that last step. If so, wait a
> short while & hope for the asterisk between the REF CAL
> 
> 73,
> 
> Gary
> KA1J
> 
> 
> 
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Re: [Elecraft] [K3XREF] Is not synchronizing

2016-04-30 Thread Harald Fritzsche

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Re: [Elecraft] [K3XREF] Is not synchronizing

2016-04-29 Thread Gary Smith
Assuming you 

1. Have tech MD set as ON.

2. Are on REF CAL and waiting to see the flashing asterisk and not 
seeing it:

Then push the REV (2) button to be sure the k3xref is engaged. 

I'm guessing you might have missed that last step. If so, wait a 
short while & hope for the asterisk between the REF CAL

73,

Gary
KA1J



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[Elecraft] [K3XREF] Is not synchronizing

2016-04-29 Thread Harald Fritzsche

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[Elecraft] K3XREF

2015-11-09 Thread William Lagerberg

Hi there all,

I am looking for a  K3EXREF who has bought one and does not use it and is 
willing to sell..

Regards PE1BSB  Netherlands



--
Pe1bsb
William lagerberg
Stommeerkade 65
1431 EL  Aalsmeer

E  will...@zendamateur.nl
 
--




This email may contain confidential and privileged material for the sole use of 
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recepient. Any review or distribution by others is strictly prohibited.
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Re: [Elecraft] K3XREF Question

2013-02-15 Thread KD7YZ Bob

On Wednesday Zilmer used a Straight-Key to send:
-Original Comment---
 Hi Bob,

 I use the Trimble Thunderbolt as a 10 MHz reference.
snip

 One thing you would want to set up different from the receiver's
 defaults is the elevation mask.
Hey, great info, thanks. I am getting one via Geo N4UA

again, thanks!

-- 
Best regards,
Bob  KD7YZWin7-64bit + K3

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Re: [Elecraft] K3XREF Question

2013-02-15 Thread Edward R Cole

Just to add some info to what Chuck, W7CS, wrote:

I have both a Rubdidum and OCXO frequency standard in my shack.  Here 
is a webpage that shows how I installed them:

http://www.kl7uw.com/Rubidium.htm
I run the OCXO as my 10-MHz reference for the K3 and VHF/UHF 
transverters (it is actually better than the Rb).  I paid about $45 
on e-bay for mine.  It has run continuously since I installed it 
(about two years).


Here is my beta test of the K3EXREF:
http://www.kl7uw.com/K3EXREF.htm

Hope this is helpful to those considering this topic.
73, Ed - KL7UW

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[Elecraft] K3XREF Question

2013-02-14 Thread Edward R Cole

KD7YZ Bob:

Not your original question, but most are not aware that the common 
J-pole is a vertical polarized Zepp.  I built a dual-band J-pole for 
6m/10m and use a coax relay to switch feed selection for either 
band.  No tuner required for the band segment I desired.  Full description at:

http://www.kl7uw.com/J-Pole.htm

73, Ed - KL7UW

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[Elecraft] K3XREF Question

2013-02-14 Thread Chuck Smallhouse

Hi Don and All

IMHO using a GPS disciplined 10 MHz (Trimble etc.) or a Rubidium 
standards are unnecessary , expensive and overly complicated 
approaches, to be used as the K3XREF 10 MHz external source.


There are extremely stable (as high as 10 x-12th) Double Oven 
Controlled Xtal Oscillators (OCXOs) available on the Off Shore 
surplus market, for under $50 delivered.  These are pulls from US 
built surplus equipment, and are guaranteed and tested .   I have 
bought several, and the latest one has been bench tested for several 
months, and after initial adjustment has not varied a single cycle on 
my GPS locked counter.  Even this stability, is an overkill, when 
used as an external reference for the frequency, not phase locked K3.


These OCXOs are less than 2 cube in size and available on e-Bay from 
several dealers.  Check e-Bay under the subject OCXO.


Chuck,  W7CS

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Re: [Elecraft] K3XREF Question

2013-02-14 Thread hawley, charles j jr
Yes. I have had the GPS system and also the Rubidium and other than seeing my 
HP counter with the oven controlled oscillator agree with them from time to 
time, I have to say it was pretty boring. Eventually both the standards broke 
and the HP is still with me.

Chuck, KE9UW
Lionel Trains, TCA, LCCA, LRRC
aka Jack, BMW Motorcycles BMWMOA #224


From: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net] on 
behalf of Chuck Smallhouse [w...@theriver.com]
Sent: Thursday, February 14, 2013 6:18 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] K3XREF Question

Hi Don and All

IMHO using a GPS disciplined 10 MHz (Trimble etc.) or a Rubidium
standards are unnecessary , expensive and overly complicated
approaches, to be used as the K3XREF 10 MHz external source.

There are extremely stable (as high as 10 x-12th) Double Oven
Controlled Xtal Oscillators (OCXOs) available on the Off Shore
surplus market, for under $50 delivered.  These are pulls from US
built surplus equipment, and are guaranteed and tested .   I have
bought several, and the latest one has been bench tested for several
months, and after initial adjustment has not varied a single cycle on
my GPS locked counter.  Even this stability, is an overkill, when
used as an external reference for the frequency, not phase locked K3.

These OCXOs are less than 2 cube in size and available on e-Bay from
several dealers.  Check e-Bay under the subject OCXO.

Chuck,  W7CS

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[Elecraft] K3XREF Question

2013-02-13 Thread KD7YZ Bob
Howdy K3' people:

I have the K3XREF board and would like to get a device to use with it.

What is suggested? And what external antenna goes with it?


thanks



-- 
73
KD7YZ Bob

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Re: [Elecraft] K3XREF Question

2013-02-13 Thread Don Wilhelm

Bob,

You can use a 10 MHz Rubidium standard, or for even more accuracy, the 
Trimble Thunderbolt.

The Thunderbolt requires a GPS antenna.

73,
Don W3FPR

On 2/13/2013 7:55 AM, KD7YZ Bob wrote:

Howdy K3' people:

I have the K3XREF board and would like to get a device to use with it.

What is suggested? And what external antenna goes with it?


thanks





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Re: [Elecraft] K3XREF Question

2013-02-13 Thread Stewart Bryant

...remembering the advice about voltage levels.

As far as I can see you can either use the ext ref continuously
(which was my plan) or you can use it as a very handy way
of re-calibrating the internal reference from time to time.

- Stewart/G3YSX



On 13/02/2013 13:16, Don Wilhelm wrote:

Bob,

You can use a 10 MHz Rubidium standard, or for even more accuracy, the
Trimble Thunderbolt.
The Thunderbolt requires a GPS antenna.

73,
Don W3FPR

On 2/13/2013 7:55 AM, KD7YZ Bob wrote:

Howdy K3' people:

I have the K3XREF board and would like to get a device to use with it.

What is suggested? And what external antenna goes with it?


thanks





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Re: [Elecraft] K3XREF Question

2013-02-13 Thread Matthew Zilmer
Hi Bob,

I use the Trimble Thunderbolt as a 10 MHz reference.  This is a GPS disciplined 
clock, using GPS as the main time reference and an OCXO.  The time and 10 MHz 
output are both very precise, in the 30 PPT range (though this precision 
varies, but not by even an order of magnitude).  You can find the manual at 
http://trl.trimble.com/docushare/dsweb/Get/Document-10001/ThunderBoltBook2003.pdf.

You will need to mount an outdoor GPS antenna.  I use a Thales land surveying 
antenna and 40 feet of microwave coax.  The receiver generally sees 8 channels 
with more than 40 dB C/No (which is a good signal for GPS).  

There are two software apps you may want to pick up:
- Trimble's control program.  This is used to set up parameters for the 
receiver.
- Lady Heather's GPS Disciplined Oscillator program.  This can be used to 
monitor the status of the receiver and signal levels, time, etc. graphically.

One thing you would want to set up different from the receiver's defaults is 
the elevation mask.  I believe the default is 5 degrees.  I'd recommend 15 
degrees.  This tells the receiver not to use sats below the 15 deg horizon.  
The lower in the sky a sat is, the noisier it is.

Matt Zilmer, W6NIA

-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of KD7YZ Bob
Sent: Wednesday, February 13, 2013 4:56 AM
To: K3 List
Subject: [Elecraft] K3XREF Question

Howdy K3' people:

I have the K3XREF board and would like to get a device to use with it.

What is suggested? And what external antenna goes with it?


thanks



-- 
73
KD7YZ Bob

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