good members
What are your opinions on the usage of Rubidium Frequency Standards - in the
sense - should they be used for short periods of time (until they reach a
stable state) as a check only,or is it permissible to run them continuously?
In other words, is the lamp (which is the expensive
David McGaw wrote:
Does anyone know of a source of push-button switches for the
Racal-Dana 1992? I have one that over half are bad. No luck from
Racal-Dana or their service house.
The original makers of that switch (Omron?) stopped making them years
ago. I wonder why?
The last time I
Does anyone know of a source of push-button switches for the
Racal-Dana 1992? I have one that over half are bad. No luck from
Racal-Dana or their service house.
Thanks,
David
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Had the same trouble!!! bought a junk racal unit (they have several models) for
$10 stole the switches from it!!! Sad way to send a unit to the scrap BIN!!!
The unit is EXCELLENT well worth the repair effort
Norm
David McGaw [EMAIL PROTECTED] wrote:
Does anyone know of a source of
I have a friend who has two of the surplus (telephone Co. ?) timing
receivers. That use a Motorola
(A111219115) GPS receiver and a ovenized 5 MHz oscillator
It has external connectors for 5 MHz., 1 PPS, -48Volts, RS232, and the
Antenna.
He has the matching Antenna which is marked 5 Volt and
Can you get some photos so we can try to recognise it?
Rob K
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Bill Janssen
Sent: 10 March 2008 18:30
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Motorola GPS + 5 MHz
Hello,
I have some other Time and frequency stuff for some time nuts, before I place
it on ebay.
A Stanford Research SR620 Time interval counter including option 1 (Oven Osc.)
Well working and timebase adjusted.
A Vectron Crystal Oscillator CO-811B-1 10 MHz is a replacemant for the
HP 10811
Bill,
This one of the old Motorola Basic receivers. Is it in a plastic box or an
aluminum one? Doesn't matter, just curious.
Many years ago I created a PDF version of the old VP command set which is
supported by the Basic. I think Jason Rabel has a copy on his website.
Jason, are you out there?
Hello Eric,
how much are you asking for the SR620?
thanks,
Said
In a message dated 3/10/2008 12:31:50 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
I have some other Time and frequency stuff for some time nuts, before I
place it on ebay.
A Stanford Research SR620 Time interval
randy warner wrote:
Bill,
This one of the old Motorola Basic receivers. Is it in a plastic box or an
aluminum one? Doesn't matter, just curious.
Many years ago I created a PDF version of the old VP command set which is
supported by the Basic. I think Jason Rabel has a copy on his website.
Thanks Bruce,
I guess I have been away from the GPS timing sector for too long. I'm sure I
will hear from Rick...
Randy
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Bruce Griffiths
Sent: Monday, March 10, 2008 1:25 PM
To: Discussion of precise
Guys,
I need to come up with a 0db little splitter to route 1 antenna into 2 GPS
receivers. To keep the isolation up I want to use an active splitter instead
of a passive one. I suppose I could use a passive splitter followed by two
LNA's (one to each receiver), but I would then have to add a lot
randy warner wrote:
Guys,
I need to come up with a 0db little splitter to route 1 antenna into 2 GPS
receivers. To keep the isolation up I want to use an active splitter instead
of a passive one. I suppose I could use a passive splitter followed by two
LNA's (one to each receiver), but I
In message [EMAIL PROTECTED], Bruce Griffiths writes:
I need to come up with a 0db little splitter to route 1 antenna into 2 GPS
receivers. To keep the isolation up I want to use an active splitter instead
of a passive one.
I have no idea if it is feasible at GPS frequencies, but two
Bruce,
I'm afraid I have to agree. I just can't seem to find an easy way to do
this. I suppose I could cut one of my HP splitters apart, but that would be
rather ugly and costly. ;-)
Randy
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Bruce Griffiths
Dan,
Thanks for the info. It looks like Mini-Circuits little BP2G IC should work
well enough. 3dB of loss SHOULDN'T bother anything, the Novatel L1 CP
receivers we use here are almost deaf... So long as the isolation stays
up in the high 20's and I put buffers on all ports I should be OK.
Hello Randy,
You may find that you have excess gain from the existing LNA/Antenna to
the GPS RX.
Using a passive splitter, 1/2 to both outputs, will not degrade performance.
If you do not have excess gain, a cost effective approach is a ebay
splitter by Symmetricom.
Last one I got was 30$
Hi Randy:
Do you know that one of the receivers causes a problem for the other one?
It may be that a passive splitter is all you need, like:
http://www.prc68.com/I/4GPS.shtml
To get more isolation you could pad between the splitter and receivers since
most receivers operate over a large dynamic
On Fri, Feb 29, 2008 at 6:50 PM, Tom Van Baak [EMAIL PROTECTED] wrote:
I'd be interested in reports on how well these work for GPS
antennas, both in terms of lightning protection and in terms
of attenuation, tempco, or phase delay.
Permanent GPS Stations - Surge and Lightning Protection:
For maximum stability, the rubidium should be run continuous.
I lost a lamp in a FRK-L last summer. The unit had been running for 9
years continuous - and I was the second owner. It was used at a LORAN
site previous, I am sure they probably ran it continuous, for the same
reasons.
The
On Mon, Mar 10, 2008 at 10:12:46PM -0500, Brian Kirby wrote:
For maximum stability, the rubidium should be run continuous.
I lost a lamp in a FRK-L last summer. The unit had been running for 9
years continuous - and I was the second owner. It was used at a LORAN
site previous, I am sure
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