david.partri...@perdrix.co.uk
more about the divider: http://www.perdrix.co.uk/FrequencyDivider/index.html
Regards,
Adrian
Ken Kubick schrieb:
Hi time-nuts guys, I am looking for the email address for David Partridge. I
want to find out more information on the 'time-nuts' frequency divider
My trusted 58503B displays strange values, this suddenly started a couple of
weeks ago.
TI values used to be within +- 50ns, now the monitoring software shows
values going between +- 500 ns!
What could be the reason for this? I replaced the internal UT+ GPS receiver,
same results.
Any
david.partri...@perdrix.co.uk
See also www.perdrix.co.uk where you'll find a write up on the divider.
Sorry to say, there are no made up boards left. The minimum order that's
economic is for 100 made up boards, so I need a lot of interest to justify
another batch.
I have a very few
Specific Products made a whole line of similar receivers, some tube and
some solid state. I've got a WWV unit and the long wire antenna kit for
it.
Try BAMA, or other boatanchor sites.
-John
=
I recently picked up an interesting early 1970s vintage WWVB
receiver, Model 630,
Have you another GPSDO with a PPS output? If not then try to connect the
PPS output of the UT+ and the 58503 PPS output to a dual trace 'scope with
persistence, trig on the UT+ and see the total span of the 58503 PPS.
On Wed, Jul 25, 2012 at 10:59 AM, nde n...@hispeed.ch wrote:
My trusted
Hi
Rather than adapt the TBolt, why not adapt the 9908? 10 MHz going into
everything is a lot easier to keep track of than 1 MHz here and 10 MHz
everywhere else. The how to divide question is still the same, the
location of the divider changes...
Bob
-Original Message-
From:
I've finally had chance to pull my Rapco 1804M GPS conditioned
oscillator apart to try to debug it.
To recap I bought this a few months ago from an ebay vendor. It was fine
at first (for a few hours) although I needed a better antenna or better
site for the one I have but the second chance I
How about a 10 MHz OCXO and a divide by two chip? Maybe an op-amp to
change and/or invert
the control voltage?
On 07/25/2012 02:05 PM, Paul Flinders wrote:
I've finally had chance to pull my Rapco 1804M GPS conditioned
oscillator apart to try to debug it.
To recap I bought this a few
Can you post up a few pictures of the oscillator?
There have been people that have opened these up and repaired them. If you
feel not up to it, why not see if someone on this group can help.
Repairing it will eliminate a lot of searching.
Tom
- Original Message -
From: Paul
This approach could also facilitate using a higher perfromance OCXO. This is
after all time nuts (: I'm surprised to hear how few 5 Mhz OCXO's are
avaliable on the bay right now. Earlier this year I picked up a nice Wenzel 5
Mhz OCXO for $100.00
--- On Wed, 7/25/12, Chuck Forsberg
I have an original that I could send to Dave at Artek for scanning. I don't
see it on his site.
I don't know what he will charge but usually it's very reasonable.
Regards,
Tom
- Original Message -
From: Tom Miller tmil...@skylinenet.net
To: Discussion of precise time and frequency
On 25/07/12 22:27, Tom Miller wrote:
Can you post up a few pictures of the oscillator?
There have been people that have opened these up and repaired them. If
you feel not up to it, why not see if someone on this group can help.
Repairing it will eliminate a lot of searching.
Pictures at
On 25/07/12 22:18, Chuck Forsberg WA7KGX N2469R wrote:
How about a 10 MHz OCXO and a divide by two chip? Maybe an op-amp to
change and/or invert
the control voltage?
Yes I've thought about that. In fact it might be the better way to go as
10MHz output would definitely be more useful.
I
And should you decide to upgrade, I have two Austron 1250A standards, (which
contain a 5 MHz OCXO), unused in original boxes, with service manual, for
sale at just $500 each. The voltage control is +/- 5 VDC.
I'm avoiding the fleabag site unless necessary...
-Doug Ronald
AE6SY
-Original
Hi
That's just a basic solder sealed package. It should be pretty easy to pop
open. You'll use up a bit of solder wick doing it…
Bob
On Jul 25, 2012, at 6:03 PM, Paul Flinders wrote:
On 25/07/12 22:18, Chuck Forsberg WA7KGX N2469R wrote:
How about a 10 MHz OCXO and a divide by two chip?
On 25/07/12 22:49, Mark Spencer wrote:
This approach could also facilitate using a higher perfromance OCXO. This is
after all time nuts (: I'm surprised to hear how few 5 Mhz OCXO's are avaliable
on the bay right now. Earlier this year I picked up a nice Wenzel 5 Mhz OCXO
for$100.00
Do
On 25/07/12 23:10, Bob Camp wrote:
Hi
That's just a basic solder sealed package. It should be pretty easy to pop
open. You'll use up a bit of solder wick doing it…
If there's anyone in the UK who has experience with these let me know if
you're willing to have a go.
If not I suppose I
Hi
There are a bunch of Morion OCXO's on eBay. You may or may not get a good one,
but the price is right. Most of them are significantly better than what you
have now.
Bob
On Jul 25, 2012, at 6:14 PM, Paul Flinders wrote:
On 25/07/12 22:49, Mark Spencer wrote:
This approach could also
On 25/07/12 23:19, Bob Camp wrote:
Hi
There are a bunch of Morion OCXO's on eBay. You may or may not get a good one,
but the price is right. Most of them are significantly better than what you
have now.
I suppose that the argument is that the GPS keeps the frequency to much
tighter limits
Yep... If you are prepared to go with a 10 Mhz OCXO and want to keep the costs
down the Morion units are worth looking at. I picked up two of them earlier
this year. I was pleasantly surprised at the performance. I don't recall the
spec's off hand but at least one of the vendors has an
On 25/07/12 23:27, Mark Spencer wrote:
Yep... If you are prepared to go with a 10 Mhz OCXO and want to keep the costs
down the Morion units are worth looking at. I picked up two of them earlier
this year. I was pleasantly surprised at the performance. I don't recall the
spec's off hand
Make up an adapter board with the divide by two under the Morion oscillator.
Make the correct pin out on the board.
Those units are very nice for the money. You might get a bad one though.
They have an issue with a SMT capacitor on many of them. But again, many
have opened them up for repair.
Take another look at flea bay. If you search for 5 mhz oscillator
and weed out the trash there are a few decent looking units.
As for repairing the original, go for it. You can't make it any worse.
I would use a utility knife to scrape away as much solder as possible
but don't use the
Bob:
Perhaps you can describe how to do this. I can't see a way that would not
make a huge mess (big torch) or not ever get there (big soldering iron). I
would really like to be able to get inside of some of these without making
them all into trash.
Demian
How about using a commercial type Hot Plate. I have one that
can be set to temp. I use it for cleaning SMD devices off PC
boards.
73, Dick, W1KSZ
-Original Message-
From: Demian Martin demian...@yahoo.com
Sent: Jul 25, 2012 3:47 PM
To: time-nuts@febo.com
Subject: [time-nuts] 5MHz
You might try to use some chip-quik alloy. It greatly lowers the melting
point of the solder.
http://www.chipquikinc.com/
Their flux is very good also.
- Original Message -
From: Richard W. Solomon w1...@earthlink.net
To: Discussion of precise time and frequency measurement
Hi Jeff,
The VFD module is identical to the ones used in the 53131A and 53132A
counters. It is a part of the A2 input assembly in the counters (p/n
53131-60002). The good news is that Agilent still has 7 new and tested units
in stock. The bad news is that the list price is $756.00. Even though
Hi:
If you want to de-solder the case, I have had success taking some #12 or
#14 bare copper wire ( standard solid conductor house-wiring stripped of
the PVC insulation ) and wrapping it tightly around the base just above
the soldered junction. The wire is installed in my soldering gun just
like a
Hi;
If you can find a part number for the VFD only you may be able to purchase
them, but you would need a part number. In the recent past have purchased 3458A
VFD displays alone with the part number for about $100ea , but I believe if you
ask parts ID they will tell you that 3458A VFD are not
I haven't heard of that trick before, but it sounds interesting. What's
the wattage of your soldering gun?
Ed
On 7/25/2012 6:41 PM, Ron Ward wrote:
Hi:
If you want to de-solder the case, I have had success taking some #12 or
#14 bare copper wire ( standard solid conductor house-wiring
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