I was one of the beta testers and I tested the unit with the standard
oscillator. I haven't run into any issues and found the fixed error
across all bands to be quite nice. I never saw more than about 3Hz of
error no matter the frequency on the VFO dial. Thats not to mean that
if you have a
Igor and Brett,
Thanks, you've answered my questions.
Regarding the application, I occasionally participate in FMT
exercises/competitions and have always done pretty well (within 75
milliHertz) with nothing but on-air references like WWV, lots of FFT
averaging, and linear interpolation of VFO
This may be a naive question but...
If the K3EXREF keeps the K3's reference oscillator within 2 Hz, then what
value is there in using the K3EXREF in conjunction with the KTCXO3 instead
of just the native K3 oscillator?
K3EXREF: 2 Hz error @ 14 MHz : 0.1 ppm
K3TCXO3: 7 Hz error @ 14 MHz : 0.5
error observed was +2.5 Hz on 6m.
--
Message: 29
Date: Fri, 20 May 2011 08:58:55 -0700 (PDT)
From: Dan AE9K a...@pkts.net
Subject: Re: [Elecraft] Installed K3EXREF
To: elecraft@mailman.qth.net
Message-ID: 1305907135916-6386626.p...@n2.nabble.com
Content-Type: text/plain
Ed,
Thanks for the response. Let me clarify my question. I'm wondering if the
KTCXO3 0.5 ppm oscillator can be omitted and still get great results with
the K3EXREF and the standard 5 ppm oscillator. This is of interest because
I intend to acquire the K3EXREF but do not have the KTCXO3 and
I would use the KTCXO3 if I ever intended to use it apart from the
reference source. I take my K3 to multi op contest weekends, field
day, IOTA dxpedition class.
On Fri, May 20, 2011 at 10:47 PM, Dan AE9K a...@pkts.net wrote:
Ed,
Thanks for the response. Let me clarify my question. I'm
Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dan AE9K
Sent: Friday, May 20, 2011 10:48 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Installed K3EXREF
Ed,
Thanks for the response. Let me clarify my question. I'm wondering
I'm not picking on Paul, this is just a handy place to reply. I'm going to say
this one more time (the first time was two years ago).
I really don't understand all of the fuss about 1 Hz accuracy when just
changing the K3 Width and Shift controls moves the frequency more than that and
this is
Wes Stewart wrote:
I really don't understand all of the fuss about 1 Hz accuracy
Because so many customers asked for it. I'll leave it to them to list
their reasons, but in my case, I like being dead-on over a wide range
of temperatures without having to occasionally recheck my manual
Glad you're going to give it a rest.
N5GE
On Fri, 25 Mar 2011 09:45:31 -0700 (PDT), Wes Stewart n...@yahoo.com wrote:
I'm not picking on Paul, this is just a handy place to reply. I'm going to say
this one more time (the first time was two years ago).
I really don't understand all of the
You should try it.
--- On Fri, 3/25/11, n...@n5ge.com n...@n5ge.com wrote:
From: n...@n5ge.com n...@n5ge.com
Subject: Re: [Elecraft] Installed K3EXREF
To: elecraft@mailman.qth.net
Date: Friday, March 25, 2011, 1:02 PM
Glad you're going to give it a rest.
N5GE
On Fri, 25 Mar 2011
is both accurate and stabile in freq.
73, Ed - KL7UW
--
Message: 37
Date: Sun, 20 Mar 2011 18:40:52 -0700
From: Matt Zilmer mzil...@verizon.net
Subject: Re: [Elecraft] Installed K3EXREF
To: Jerry Muller l...@k0tv.com
Cc: elecraft@mailman.qth.net
Message-ID
that K3EXPEF is only required for GHz operation?
Thanks for your advice in advance.
cheers,
Johnny VR2XMC
寄件人﹕ Edward R. Cole kl...@acsalaska.net
收件人﹕ Elecraft@mailman.qth.net
傳送日期﹕ 2011/3/21 (一) 7:51:37 PM
主題： [Elecraft] Installed K3EXREF
Matt,
I agree
of the production units when they become available. I will
probably order my second K3 with a K3EXREF.
Jerry - K0TV
- Original Message -
From: Paul Christensen w...@arrl.net
To: elecraft@mailman.qth.net
Sent: Saturday, March 19, 2011 9:34 PM
Subject: Re: [Elecraft] Installed K3EXREF
I
And EME at 23cm given the rest of my station can be linked to my G3RUH
GPS stabilized 10MHz ref.
73, tom n4zpt
On 3/20/2011 11:51 AM, Jim Miller wrote:
I'm guessing this is really useful for EME at UHF.
jim ab3cv
__
Elecraft
my second K3 with a K3EXREF.
Jerry - K0TV
- Original Message -
From: Paul Christensen [hidden email]
To: [hidden email]
Sent: Saturday, March 19, 2011 9:34 PM
Subject: Re: [Elecraft] Installed K3EXREF
I installed it on Friday in about 30 minutes, but I'm comfortable
On 3/19/2011 9:34 PM, Paul Christensen wrote:
Major snip of excellent information
At least some AM stations operating with digital subcarriers are GPS
locked and can be extremely accurate. WMAL 630 KHz here in the
Washington DC area is one example. It's as close to 630 KHz as I can
measure
Many thanks to Ed KL7UW, Ron AC7AC and Paul W9CA for your helpful
comments on the K3EXREF.
I look forward to this product being available in due course and I have
my 10 MHz standard poised in readiness.
73 de David G4DMP
--
+ - - - - - - - - - - - - - - - - +
| David M Pratt, Kippax, Leeds.
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Pratt
Sent: Saturday, March 19, 2011 3:49 PM
To: Edward R. Cole
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Installed K3EXREF
That seems quite a long time to install it, Ted. What's involved? I
have looked for the manual
Excellent posting by W9AC, a great reference, to be saved.
Now I wonder if it would be possible for someone to enlighten me as to
the need for such extreme accuracy? Is it because my K3 reads out to 1 Hz
but I can't really believe the absolute accuracy of that number unless I
get a K3EXREF?
The K3 is indeed sufficiently accurate for amateur use, but if you
already have a 10 MHz Rubidium, Caesium or GPS standard, Rick, then why
not couple it up your K3? It's just another refinement and helps to put
yours existing frequency standard to good use.
73 de David G4DMP
In a recent
the need?
Just because its there and something the import rigs dont have?
Mike AC5P
From: Rick Stealey rstea...@hotmail.com
To: elecraft@mailman.qth.net
Sent: Sun, March 20, 2011 9:45:59 AM
Subject: Re: [Elecraft] Installed K3EXREF
Excellent posting
What's a GPSDO setup go for including an antenna?
73
jim ab3cv
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list
The question of 1 Hz accuracy can get multiplied a lot in VHF work.
If one is talking about HF, it is hard to see the need. Personally, I
*LIKE* the idea of being spot on. It's not a technological justification,
but one I might spend a moderate sum to nail. If I was doing VHF or UHF
work, I
My reason for wanting one of them is to maintain a stable frequency on VHF and
UHF.
73,
Tom
N5GE
On Sun, 20 Mar 2011 14:45:59 +, Rick Stealey rstea...@hotmail.com wrote:
Excellent posting by W9AC, a great reference, to be saved.
Now I wonder if it would be possible for someone to
I'm guessing this is really useful for EME at UHF.
jim ab3cv
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted
Jim asked:
What's a GPSDO setup go for including an antenna?
73
jim ab3cv
You can put together a GPSDO system with 10 MHz output for less than $200.
Here's just one example:
Ebay item # 290322053618 By buying the items separately, you can sometimes
do even better on price.
The Trimble
While this sounds interesting, has any progress been made for those of
us who have the TCXO to be able to program its printed offsets in the
firmware and have it act on them? The fields are currently there in the
K3 utility but as yet unused, as I understand it. I would be pleased to
have this
There have been some homebrew GPS standards in the literature for those who
like melting solder. One was in QST back in July '98. AA engineering is
offering circuit boards and has the original QST article on their site
(http://www.a-aengineering.com/ )
I certainly agree with David that the K3
See URL:http://www.jrmiller.demon.co.uk/projects/ministd/frqstd.htm
73,
Lyle KK7P
I have no financial interest in James' products. I know from decades of
working with him that his stuff is meticulously engineered and
optimised. LJ
That said, IS there a GPS governed 10 Mhz source to be
for
adding sub-Rx IF Out).
73, Ed - KL7UW
--
Message: 33
Date: Sun, 20 Mar 2011 14:45:59 +
From: Rick Stealey rstea...@hotmail.com
Subject: Re: [Elecraft] Installed K3EXREF
To: elecraft@mailman.qth.net
Excellent posting by W9AC, a great reference, to be saved.
Now I wonder
Another benefit of the GPS-DO is that routine calibration to ensure
long-term accuracy is the responsibility of the U.S. Department of Defense,
and funded by U.S. tax payers. Unless there's a hardware-related problem
with the GPS-DO, calibration is someone else's problem and expense. The
The K3EXREF is in field test now, as far as I know. It might be a
little while before Elecraft puts it up for sale.
Extreme accuracy probably has two psychological and one scientific
source:
- The need to put the K3 dead-on frequency is reassuring to folks that
aren't sure it stays that way
with a K3EXREF.
Jerry - K0TV
- Original Message -
From: Paul Christensen w...@arrl.net
To: elecraft@mailman.qth.net
Sent: Saturday, March 19, 2011 9:34 PM
Subject: Re: [Elecraft] Installed K3EXREF
I installed it on Friday in about 30 minutes, but I'm comfortable with my
way around the K3. I
-
From: Matt Zilmer mzil...@verizon.net
To: Rick Stealey rstea...@hotmail.com
Cc: elecraft@mailman.qth.net
Sent: Sunday, March 20, 2011 6:48 PM
Subject: Re: [Elecraft] Installed K3EXREF
The K3EXREF is in field test now, as far as I know. It might be a
little while before Elecraft puts
Jerry,
RE: 14149.9 kHz ---
I would not be comfortable cutting it that close in USB unless I was
absolutely certain there was absolutely no energy in the SSB audio 0 to
100 Hz range. I would not trust any transmitter (no matter how good) in
that regard. Keep it all within the band limits to
...@hotmail.com
Cc: elecraft@mailman.qth.net
Sent: Sunday, March 20, 2011 6:48 PM
Subject: Re: [Elecraft] Installed K3EXREF
The K3EXREF is in field test now, as far as I know. It might be a
little while before Elecraft puts it up for sale.
Extreme accuracy probably has two psychological
It took me about 1-1/2 hours to install the new EXREF for referencing
the TCXO to external 10-MHz. I have not installed the new firmware
or tested it yet...more news, later.
73, Ed - KL7UW, WD2XSH/45
==
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME:
That seems quite a long time to install it, Ted. What's involved? I
have looked for the manual on-line but it does seem to up there yet.
Any more details would be appreciated; I'd like to order one.
73 de David G4DMP
In a recent message, Edward R. Cole kl...@acsalaska.net writes
It took me
...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Pratt
Sent: Saturday, March 19, 2011 3:49 PM
To: Edward R. Cole
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Installed K3EXREF
That seems quite a long time to install it, Ted. What's involved? I
have looked for the manual
Is the K3EXEREF production or still in test? I see no mention of it on
the Elecraft WEB site, I have 10Mhz, just nowhere to plug it.
Roger VK3ADA.
On 20/03/2011 10:13, Ron D'Eau Claire wrote:
Installing the K3EXREF involves installing a connector/cable assembly in the
REF. hole in the K3's
Field Test.
73, Eric WA6HHQ
_..._
On 3/19/2011 4:19 PM, Roger de Valle wrote:
Is the K3EXEREF production or still in test? I see no mention of it on
the Elecraft WEB site, I have 10Mhz, just nowhere to plug it.
Roger VK3ADA.
On 20/03/2011 10:13, Ron D'Eau Claire wrote:
Installing the
I installed it on Friday in about 30 minutes, but I'm comfortable with my
way around the K3. I would think that most users could install it in about
an hour or less. Installation is actually very simple with very few parts
involved. K3EXREF came with an SMA connector and SMA to BNC
43 matches
Mail list logo
