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.
__
Elecraft mailing list
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
>>> 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
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