Steve,
I assume that you received my payment? I sent it the day that you
advised everyone of the total
Thanks.
Fred
On 5/21/2017 3:42 PM, Steve - Home wrote:
Jerry is making rapid progress with the machine work on the end plates and
should be contacting those who have paid to provide you
This brings up a question that I have been wondering about. Has anyone
tried using one of the Synergy M12/adaptor board assemblies as an update
in the Z3801 or similar unit? If the original firmware just ignores the
extra data, perhaps the Synergy unit might work? They are quite
inexpensive
Looks like the price has now gone back up to $200. It will be
interesting to watch to see how many sell at that price and whether they
go back on sale. At this point, 55 are reported sold with more than 10
available.
In terms of quantity available, the old/original shipping label on mine
We have noticed the same problem on some channels with Charter here in southern
Calif. As noted, there can be a problem with recordings as a result.
F. W. Bray
Sent from my CP/M phone!
On Jan 2, 2014, at 9:48, Joe Leikhim jleik...@leikhim.com wrote:
Here in Orlando, Brighthouse seems to
For those who are looking for a source of WWVB receivers / chips there
is a person in the UK who is selling the Symtrik board and antenna on
ebay -- item 23099171331. Unfortunately, the chip is embedded in expoy
but it does have a 1 pps LED. Here is the link to the data sheet:
Hi Mark,
I am not sure about the design of your OCXO but recently I repaired an
Ovenaire from a Cushman 5510 service monitor.
I found that there was a bad trimmer pot in the oven control circuit.
This wasn't apparent until I started monitoring the current drawn by the
unit while trying to
So, I gather that most folks are just connecting power to the
appropriate 2 pins on the 110 position connector. I wasn't sure whether
people were wiring directly to the DC converter.
Thanks.
Fred
On 6/3/2013 3:53 AM, Erno Peres wrote:
there is only a 48Volt connection and some unknown
Several months ago, I picked up one of the Trimble/Nortel GPSTM
(NTGS50AA) boards. I am trying to find a part number for the mate to
the 110 pin Z pack connector. It looks like Digikey part no. A97846-ND
might do the trick.
Has anyone identified the correct connector.
Thanks.
Fred Bray
Hi Mark,
Did you see this site? This person also had the unlock problem and some
others.
http://www.jvgavila.com/hp8566a.htm
I just worked on an Ovenaire in an old Cushman service monitor. I
thought that the oven was bad because it didn't seem warm compared to
other OCXO's I have seemed.
Looking at the archive, I noticed that several months ago someone
commented that the Morion MV 89A was a direct replacement for the OCXO
in the Trimble Thunderbolt in the sense that the Thunderbolt PC board is
configured to accommodate it. However, I wasn't able to find further
details.
I
On 5/28/2013 9:52 AM, Bob Camp wrote:
The MV89A is a 5 MHz resonator doubled to 10 MHz, it will have sub harmonics
that the original OCXO (using a 10 MHz resonator) does not have.
This certainly explains what I saw when I looked at a MV89A on a
spectrum analyzer and saw a signal /below/ the
Thanks for the info. I had a general idea that it might be something
like this, but it's helpful to know what to look for. I won't have time
to dig into it until next weekend. Unfortunately, HP's documentation is
not generally available so it may take some exploring.
On 5/19/2013 4:02 PM,
I may not have mentioned that I think I figured out the underlying
problem with this OCXO lies with the trimpot in the oven control
circuit. (I believe that someone mentioned this as a possibility, so I
can't take credit for finding it on my own.) Some of the other things I
did helped, but
That is an interesting question. I am in the greater LA area and have
several pieces of test gear with OCXO's. I have never taken any
precautions other than making sure that the gear can't fall off the
shelf or bench. Then again, I may not be doing things to time-nuts
standards.
There are
Thanks for all the helpful suggestions and comments so far. I will
answer a few of the questions that have been raised.
The device definitely is an OCXO as it is in an oven and gets warm. It
is an Ovenaire 73-25.
As one person commented, there are two 10 MHz outputs on the device.
One point of clarification. In my last post I said:
So far, the range seems to be from around 9.75 to 10.25 and it
has been on for over 18 hours.
That is not how much it drifts, but rather the range over which the
frequency on the counter has varied as I have tried to touch up the
One of the things I hadn't adequately considered was how quickly / much
the oven cycling affects things. I wasn't really thinking about this
when tweaking the adjustment so I wasn't doing them at a consistent
point in the cycle.
Now, it looks like it may be cycling from a low of 10.01 to
This might be slightly off-topic, but probably there is a time-nut who
knows the answer.
I am trying to adjust the 10 MHz OCXO in a Cushman 5110 service
monitor. I am using a frequency counter driven by a GPSDO. Perhaps
someone can educate me about a couple problems I am encountering.
I
Some 20 to 25 years ago a law enforcement agency in California was
experimenting with GPS in its patrol cars. It required that the officer press
key to report his/her location. It also had a pinging capability that the
officers didn't know about. Through pinging, it was discovered that a number
I unpacked by NTGS50AA board this evening. Fortunately, the used
sticker attached by the seller was small and easy to remove.
On mine, the 10 MHz oscillator says Trimble and has a part number of
34310-0 with a date code of 0002.
It has a S/N of 1669-12028.
I hope that this is of use to
As the proud owner of a new to me NTGS50AA, I have a couple of questions.
First, has anyone posted list of the pin-out for the Z pack connector?
I am particularly interested in the power, to start with, so that I can
check out the board. I may have overlooked any such posting.
Second,
I have one arriving that I will probably pick up at the post office
tomorrow. I ordered it before the price and shipping went up.
I will take a look and see whether there are any readable markings on
the oscillator. If so, I'll post them here.
Now if these units only had a 1PPS output . .
And for those who want a good debunking article to show to their
non-technical friends:
http://www.audioholics.com/education/cables/power-cables
On 5/7/2012 8:01 AM, Poul-Henning Kamp wrote:
In message226574.14407...@smtp104.sbc.mail.mud.yahoo.com, Burt I. Weiner w
rites:
Be sure to check
I bought one this morning when the shipping was $30. Since I was out
for the day, I didn't have a chance to pay for it until this evening.
The shipping charge was not changed. Apparently, it is calculated and
frozen by ebay at the time of purchase.
My guess is that he couldn't raise the
This is slightly OT, but what are people using to protect the line
inputs on barrier terminal strips on power supplies often used to power
Thunderbolts and FE-5680A's?
On things like the Mean Well and similar supplies the AC line
terminals are not fully enclosed. I happened to have an
Has anyone successfully used a Thunderbolt to discipline a FE-5680A?
I thought I saw a posting or site where someone disabled the 10 MHz
oscillator on the Thunderbolt and used the Thunderbolt to discipline the
FE-5680A. However, I can't find it now.
Thanks.
Fred
Anyone who is interested in buying these units should take a look at the
completed listings and be guided accordingly when making an offer. I
recently picked up a couple for ~ $35 each, including shipping. True
the price may be going up, but it looks like you can still get them for
under $40
Thanks for that information. I had assumed that it was obtained from
the cell towers -- after all, my cellphone does show local time.
I was hoping that there would be a TOD output. Still the device is very
nice and useful as a frequency standard.
On 11/24/2011 8:25 AM, Charles P.
I have what would probably be considered to be a newbie question, so
please excuse my likely ignorance.
I have a HP 5385A frequency counter, which I am using with an external
standard. If I try to compare one 10 MHz standard against another,
using one as the external standard and the other
Thanks to all who replied. I thought that it was a counter artifact,
but I didn't know why.
Any suggestions for a reasonably priced good frequency counter that uses
the reciprocal method? I saw there were a couple TF830's on ebay, but
they were outside the U.S.
The HP 5340A looks like it
Looks like my counter is reciprocal.
Thanks for the info.
Fred Bray
W6WAW
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Kevin,
Thanks for all the information re: the internal wiring.
It sounds like the 1 PPS output that was tested must be somewhere on the
board, even if it isn't used. In looking at the test data, it appears
that the boards were tested before final assembly. I am inferring this
from the fact
I just got mine unpacked and powered up.
So far, it looks good, with at least 6 usable pilots.
I hope to use it as a house standard, as it is a lot easier to set up a
CMDA antenna for my garage workshop than to do an antenna run for my GPSDO.
I see that there is a time of day output and that
Update:
Looks like the time of day function is not implemented in the 2700.
I have not opened it up to see if this is a software or hardware issue.
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There appears to be a 1pps function. The test documentation that came
with mine showed that step # 22 of the TS2700 PANEL TEST was a 1 PPS
output test.
As I recall from prior reading, there appears to be such an output on
the PRS10. It would be interesting to figure out where this was
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