Re: [time-nuts] AN/URQ13 reference AT cut crystal?

After a bit of research I am wondering if this odd unit was actually an attempt at a AT cut crystal reference. The temperatures seem to line up. Its certainly an alpha or less product. It was stable at 43 F. Was thinking about disconnecting the oven and bringing the leads out to manually control th

Re: [time-nuts] AN/URQ13 reference AT cut crystal?

Hi The temperature of the crystal is driven by the oven design. AT / SC / BT / IT or whatever …. it is going to be over 80C. It’s not a function of the crystal. It is what the physics of the oven force you to do. Inner oven *must* be hotter than outer oven. Outer oven *must* be hotter than the m

[time-nuts] AN/URQ13 reference AT cut crystal?

Hello to the group still working and decoding the AN/URQ-13 reference oscillator. Bob had mentioned that the crystal should be at 85 C and thats right for a SC cut crystal. Would there be any reason that this oscillator is perhaps a AT cut crystal thats in the 30 C range. Just odd that the front me

Re: [time-nuts] The amazing $5 timestamper with 6ns resolution (next, stop: 184ps)

Sorry, I forgot that time-nuts just sends text/plain and strips HTML and attachments -- I've uploaded my sample datasets to here: https://github.com/jelson/rulos/tree/master/src/app/timestamper/sample-data Your project sounds interesting and along similar lines to mine. I'm excited about the STM3

[time-nuts] Better than average Rb oscillator

Skips data is very nice! But speaking of dropping into the -14ths, the HP 5065A is hard to beat. (Unless you are fortunate enough to have an 8607 option 8 sitting in your lab!) The Yellow trace on the attached comparison plot is my 5065A, it's a really excellent performer and drops into the -14th

Re: [time-nuts] The amazing $5 timestamper with 6ns resolution (next, stop: 184ps)

Jeremy- Well done! I am certainly interested in learning more about your project. Are your charts available online, or would you mind sending me a copy (dwayne.esterl...@krytronx.com) I am running an experiment using a 20mhz OCXO driving 32bit binary counter IC's (sn74lv8154 @ about $1), and

Re: [time-nuts] Looking for help recovering a Spectracom 9383

Hi If your 9383 is running on a >= 15 year old GPS module, that could be a source of trouble. Most of the modules from that era handle the GPS rollover problem poorly. Bob > On Feb 16, 2021, at 10:00 AM, John Miller via time-nuts > wrote: > > Hello Everyone! > > TL;DR: If anyone with a Spe

[time-nuts] Looking for help recovering a Spectracom 9383

Hello Everyone! TL;DR: If anyone with a Spectracom 9383 would be willing to help me recover mine, I would be eternally grateful! Early last year I stumbled upon a local Spectracom NetClock 9383 for a very reasonable price. It worked just fine out of the gate, but because I am incapable of le

Re: [time-nuts] The amazing $5 timestamper with 6ns resolution (next stop: 184ps)

Hi You can indeed do some pretty fancy things with easy to get chips !!! If you take a look at JLPCB https://jlcpcb.com They seem to have a range of STM32’s (though not all of them …. :) ) in stock. You can do up an assembled PCB very cheaply through them. One thing you