[time-nuts] Re: poor mans environmental control for time servers (with pictures)

My brother, who worked on gas impurity metrology at NIST, tipped me off to another useful temperature control guideline: 2-3 cm of styrofoam adds about an order of magnitude to the time needed for external environmental temperature change to penetrate into a chamber. E.g., If one sees an

[time-nuts] crystal types

Folks working at KPH, RCA’s coastal marine radio station at Pt Reyes, California, asked the following question recently: It has been noticed that on (RCA) Radiomarine Corporation of America radio crystals that they have a type on the case. Some of the types noted are R1, R2, R5, RC-2A and

[time-nuts] Re: List Opinion/Suggestion(s)

Hello all — I am working on several broadcast radio projects that require a local PTP server at multiple locations. The purpose of PTP in this context is to timestamp audio and related control data. The timestamps ensure proper reassembly at distant locations after transfer over

[time-nuts] Re: time-nuts Digest, Vol 210, Issue 19

If one is interested in visiting the station, contact the MRHS directly. The station is back on the air and Covid restrictions have been gradually relaxed. > On 2021 Oct 29, at 01:49 , Dave B via time-nuts > wrote: > > On 29/10/2021 08:30, time-nuts-requ...@lists.febo.com wrote: >> Hi all

[time-nuts] crystal type codes

Hi all — The Marine Radio Historical Society out on Pt Reyes CA maintains (with the US Park Service) the KPH coastal station (originally Marconi, then RCA) as a working museum. (I highly recommend a visit if you’re anywhere nearby during your travels.)

[time-nuts] FEI Nanosync 2

Hi — In a parallel life I work as a broadcast radio engineer. An AM transmitter's hybrid digital control system contains an embedded FEI Nanosync 2 GPS receiver. The GPS time data appears to suffer from a week 1024 rollover problem, causing the control system to believe (and broadcast) a

[time-nuts] potential low-RFI power supply

Pro Audio Engineering announced a sale (through Friday) on its nominal 14 Vdc 4A switching supply . The test results webpage compares noise on the DC output

[time-nuts] Alfred Loomis - an early time nut

> On 2020 May 14, at 14:21 , Skip Withrow > wrote: > […snip…] > > A question for TVB (or anyone else that might know), what happened to > the three Shortt clocks that he [Loomis] had? About 100 Shortt-Synchronome systems were manufactured. There is not a

Re: [time-nuts] - LightSquared is back now called Ligado

Caveat: I have not personally read LightSquared’s final filings with the FCC nor the staff recommendations to the commissioners. I’m relying on the assertions written in this thread for now. If one feels strongly that, based on the facts on record, the approval by the FCC will have all

Re: [time-nuts] OCXO and fluctuations after EFC adjustment

Au contraire. My backgrounds lay scattered around in other fields, each of which have their own parallel tales where art, personalities, business, and legacy technologies/processes combine to produce unanticipated results. I learn something from every one of the “uninteresting” stories about

[time-nuts] HP3588A battery

I had to do this myself on an HP-4195A a few months ago. It was impossible to locate an equivalent NiCd of the same form factor. There was enough room to squeeze in this somewhat larger battery from

Re: [time-nuts] tracking position & orientation

Thank you, everyone, for your enthusiastic guidance and observations to my quirky question. Quite a few mentioned the difficulties in measuring rotation over a short baseline. In response to the question of “is there another measurement point 10 miles away”, the quick answer is yes: NIST

[time-nuts] tracking position & orientation

I need another project like a hole in the head — but curiosity continues to nag me. I moved to Boulder CO a few months ago. The “curiosity” is to determine the position of two antennas at either end of my house and monitor it over time, with the idea that one could see plate movement in

[time-nuts] CATV assymetries

CATV plant in inherently asymmetric in delays. Referring to the DOCSIS (data over cable service interface specification) specs for North America: Downstream to the customer: 6 MHz channels with 64- or 256-level QAM modulation. If 256-QAM is used, the raw usable bandwidth is about 38

Re: [time-nuts] can of worms: time-of-day in a community radio station

Sadly the formatting of the original message was stripped by the email server. Here is a slightly more comprehensible version. On 2019 Oct 18, at 15:20 , Eric Scace wrote: I fear that I am developing a reputation for bringing to the list rather oddball questions. In my rôle as agent

[time-nuts] can of worms: time-of-day in a community radio station

I fear that I am developing a reputation for bringing to the list rather oddball questions. In my rôle as agent provocateur, therefore, here is another such problem. Questions for you are at the end. Thanks for your thoughts,. — Eric Issue: A community broadcast radio station with

[time-nuts] imprecise but adequate time

Hi fellow time nuts — I’m looking for a sanity check or alternative suggestions for the problem and tentative solution described below. Thanks for your thoughts. — Eric Problem: In one of my day jobs, I am designing a global network of systems (using open-source software) that

[time-nuts] HP 330B distortion analyzer: free + shipping

Hi all — I know some folks have amazing knowledge and collections of previous generations of HP test gear. In cleaning out my father's lab, I uncovered an HP-330B distortion analyzer . It’s available for free to an

Re: [time-nuts] "top cover effect"

Warning: websites cited here can be seriously time-consuming rabbit holes! An anonymous engineer using the pseudonym NwAvGuy got fed up with the subjective nature of discussions about DACs and amplifiers in the world of high fidelity audio. To clear away the

Re: [time-nuts] Boulder / UC-Boulder JILA

We love McGuckin’s! > On 2018 Oct 23, at 14:57 , David Van Horn > wrote: > > Can't help you there, but be sure to swing by McGuckin Hardware.  ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

[time-nuts] Boulder / UC-Boulder JILA

Hi all — Although I live in Boston at present, I find myself with a free Monday in Boulder CO next week. Intriguing time & frequency R occurs in the JILA Precision Measurement labs — but I don’t know anyone personally. I would feel a bit uneasy just wandering about the building

Re: [time-nuts] XKCD on time :)

Which, if I recall correctly, was the system used in Japan immediately before the adoption of Western time methods. Each day’s interval between sunrise-sunset was divided into a six units… so, in comparison with an absolute scale, the absolute duration of each unit of time varied from day to

[time-nuts] time-nuts humor

For a good time, call 303-499-7111 (Sorry! My girlfriend made me do this.) signature.asc Description: Message signed with OpenPGP ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to