[time-nuts] OXCO insulation

What kind of foam insulation is generally used inside an OXCO? Do all manufacturers use the same kind? Is it available in small (hobbyist) amounts? I've read that some folks have used Great Stuff polyurethane-based insulating foam to repair an OXCO. I've used it to fill gaps around pipes

Re: [time-nuts] Navstar Systems Ltd

On 2/21/15 9:32 AM, Alberto di Bene wrote: So I agree that the best use I can make of that Navstar mushroom unit is to pry it open, and try to find the electrical signals before they are converted to optical... at least now, thanks to David, I know what the supply voltage of the beast is...

Re: [time-nuts] Morion MV-89 Stability

Has anyone measured the AD of a few Morion MV-89? Wondering how they do from 1 to 100 Seconds. (With a setup able to reach 5X10-13th at those Tau.) Thanks, Corby They vary all over the place. The ones I've bought on eBay range from pretty good to darned good.

[time-nuts] Max Neuhaus Some Time-Nuttery Here?

Delay lines, mixers, feedback, transmitters, PSTN http://www.max-neuhaus.info/radionet.htm http://www.max-neuhaus.info/audio-video/audio-video.htm# -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida jleik...@leikhim.com 407-982-0446 WWW.LEIKHIM.COM

[time-nuts] Morion MV-89 Stability

Has anyone measured the AD of a few Morion MV-89? Wondering how they do from 1 to 100 Seconds. (With a setup able to reach 5X10-13th at those Tau.) Thanks, Corby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] Microsemi (Symmetricom's) 3120A

Hi all I want to test phase noise of oscillator. How about Microsemi (Symmetricom's) 3120A? How to buy Microsemi (Symmetricom's) 3120A from Microsemi reseller in USA? who can help me to buy it? Thanks. wei ___ time-nuts mailing list --

Re: [time-nuts] Looking for advice to get a submillisecond setup

On 2/20/2015 4:25 PM, Jim Lux wrote: /For an inexpensive NTP for few hundred dollars to get better than a millisecond end of things, I think the integrated GPS antenna/receiver with a suitable computer right next to it is the way to go. Then you're just running a network cable and power. /

Re: [time-nuts] Austron 1250A Tuning tool

I adjusted my 1250A using a 1/8 brass rod that I got from the hardware store. I filed down the end to make it into a screwdriver. This worked fine. I could tell when the tip was engaged with the screw in the oscillator by feeling it fall into place and then I could make the adjustment. The

Re: [time-nuts] Navstar Systems Ltd (was: Looking for advice to get a submillisecond setup)

Probably best to just pop it open and see what’s inside. Unless you get very lucky, the fiber optic cables, connectors, and transmitter / receivers will be tough to find. Thanks Bob, Jim, Chris, David for your answers. Well, I have already a few timing resources, like a Thunderbolt, a

Re: [time-nuts] Austron 1250A Tuning tool

Fantastic, just what I needed. A little gentle persuasion with a knife coaxed one of my crappy screwdrivers blade to become long enough (or rather, the handle short enough..) to fit. 5 minute job once I knew what is on the other end. Thank you! OleP ___

[time-nuts] Navstar Systems Ltd

Alberto posted some pictures of a GPS receiver from Navstar Systems Ltd.. They're still in business, but don't appear to be doing that any more.. However, I did run across this: Sarantel is a spin-off of Symmetricom founded in 2000 by Dr. Leisten. Leisten was spearheading the development of a

Re: [time-nuts] Looking for advice to get a submillisecond setup

Looks like you need the other half of this unit. It looks like it is designed to use fiber optic cable. You would need to other box to accept the fiber cables, decode the data and interface it to a normal computer port. A good, brand new timing receiver is less then $100. So I'd not want to

Re: [time-nuts] Looking for advice to get a submillisecond setup

Symmetricon swallowed Navstar Systems Ltd. In 1993. So if there were any information available, they would likely have it, but I fear it may be long gone. I did find this reference in the time-nuts archive: http://www.navsync.com/docs/mushroom_data_sheet.pdf Which looks like the same animal

Re: [time-nuts] Microsemi (Symmetricom's) 3120A

For China, try contacting Rock Electronic in Shenzhen ( http://www.rockelec.com/en/html/about.asp ). Symmetricom's international distribution was handled by independent resellers on a regional basis, and a distributor for one country would not normally sell outside their market. I'm not

Re: [time-nuts] Austron 1250A Tuning tool

I've had the ovens apart to replace a dead 3N128 in one of my 1250As. What you are adjusting is a trimmer cap in the oscillator circuit, and if too much pressure is applied trying to engage the slot in the trimmer, it is easy to bend the trimmer off at an angle where you will never be able to

[time-nuts] Pinout of FEI 5680B

Hi Just so it goes into the archives. Here’s the pinout for the FE-5680B with a 15 pin connector on it. Marking shows as part number 2616000-51604 Pin Function 1 = +15V power in (likely the same spec as 5680A) 2 ground 3 +5 power in (for