Re: [time-nuts] Microsemi 3120A sold on eBay
On Sat, 27 Jan 2018 22:10:21 -0500, you wrote: >It is interesting to note that the seller is in Salem, MA, a few miles south >of Microsemi in Beverly, MA. OT, a bit: my ham radio elmer worked for Bomac in Beverly, MA, which became Varian, which I just googled and indeed was bought at least in part by Microsemi! The P2V Neptune aircraft used one of their hydrogen thyratrons to fire the megawatt search radar. We now return you to time/frequency stuff --- This email has been checked for viruses by AVG. http://www.avg.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Oscilloquartz OSA-4350 GPSDO
On Sun, 31 Dec 2017 20:56:26 +0100, you wrote: > Without a thermal camera I've used a 4-1/2 digit DVM set for 200mV full > scale, or 20mV if you can do that. Often the low uV resolution will allow you > to trace the current path, just start at the power and ground inputs to the > board and follow the voltage drops to the short. Or go old-school with an HP > logic pulser and current probe... OK, I think, made an audible low-ohm probe "Shortsqueak?" That can resolve an inch or less of PC board trace. You can't have mine! --- This email has been checked for viruses by AVG. http://www.avg.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Two pieces of old General Radio Freq. Nuts
On Mon, 22 May 2017 05:59:59 -0700, you wrote: >https://goo.gl/photos/tygN5ZFeFLUhc4zX6 > >Near Portland Oregon Neat stuff...did anybody but GR use those hermaphrodite connectors? I have an adapter for them that came with a wide-band amplifier; "delay line" type, with a whole row of, I think, 6AK5s in it. -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G --- This email has been checked for viruses by AVG. http://www.avg.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Smart Phone time display accuracy...?
On Thu, 16 Mar 2017 20:11:30 -0400, you wrote: >Notice Gary doesn't specify which brand of Android phone, much less >the specific model and carrier Sorry about that, and I should know better (In another group "FlDigi won't work with my radio" and nothing else...). Droid Razr M AKA Motorola XT-107 on Verizon. I understand tenths of a second aren't time nuts worthy, but as a clock, it ain't bad. Unless you're measuring the arrival time of neutrinos. -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G --- This email has been checked for viruses by AVG. http://www.avg.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Smart Phone time display accuracy...?
On Thu, 16 Mar 2017 13:16:11 -0700, you wrote: >My iPhone seems to be accurate to 5 minutes or so. There are two of them in >my >house and they never agree. My computer is saying 1:15 PM local time, my >iPhone >says 1:20PM Not to gloat, but my Android phone is always spot on. I have a GPS time app that shows the difference between GPS and phone time and it's always in the tenths of a second area. -- Gary Woods O- K2AHC Public keys at home.earthlink.net/~garygarlic, or get 0x1D64A93D via keyserver fingerprint = E2 6F 50 93 7B C7 F3 CA 1F 8B 3C C0 B0 28 68 0B --- This email has been checked for viruses by AVG. http://www.avg.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Bye-Bye Crystals
On Mon, 13 Mar 2017 15:01:39 +, you wrote: >What minimal equipment would you need to make your own crystals ? There was a WWII era "how they spend your war bonds" film that showed the process pretty well. Diamond saws to cut the raw quartz, X-ray diffraction to find the proper axes prior to cutting out blanks, assorted polishing/lapping stuff, etching with truly nasty stuff. ISTR that if you put a piece of foil under the plate glass you're grinding on, you can hear a noise peak on a receiver at the approximate frequency. I once raised a cheapo surplus crystal 60Kc plus to put it into the 40-meter CW band; worked fine! IOW, not a trivial thing. -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G --- This email has been checked for viruses by AVG. http://www.avg.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Vintage Frequency Measurement
On Sun, 12 Feb 2017 17:16:18 + (UTC), you wrote: >In a word,Wavemeters. Classic US onwas the BC221 with built in 100kHz crystal >calibrator A couple of years ago, I got a BC221 from an estate; had to recap the homebrew power supply the late ham had built for it, but the BC221 worked fine and after all these years I could still zero beat the reference crystal against WWV, using the S-meter when the beats got too slow to hear. Absolutely beautiful dial mechanism on those critters. Totally OT: I once sat radio in a P2V "Neptune" that was being ferried back to Alameda for update; still had the ART-13/BC-348 combo with an LM freq meter. -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] hm H Maser
Hydrogen maser in radio astronomy to sync worldwide systems: http://flip.it/rmbdRQ (Lifted from the Albany, NY astronomy group). -- Gary Woods O- K2AHC Public keys at home.earthlink.net/~garygarlic, or get 0x1D64A93D via keyserver fingerprint = E2 6F 50 93 7B C7 F3 CA 1F 8B 3C C0 B0 28 68 0B ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] SR620 Failure Code.
On Thu, 22 Dec 2016 16:50:17 -0500, you wrote: >That's just crazy, but that was the problem. It's documented, so it's not a bug. -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Swagelok and metric tubing question
On Sat, 12 Nov 2016 13:05:56 -0800, you wrote: >Does it leak through cracks or migrate through metal? I was kinda wondering about that. Isn't H the escape artist of the periodic table? -- Gary Woods O- K2AHC Public keys at home.earthlink.net/~garygarlic, or get 0x1D64A93D via keyserver fingerprint = E2 6F 50 93 7B C7 F3 CA 1F 8B 3C C0 B0 28 68 0B ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] PC clock generator without 14.318MHz
On Tue, 18 Oct 2016 16:53:15 +0200, you wrote: >14.317 MHz quartz. Such frequency is a relic of original PC design It's 4X the color subcarrier frequency in NTSC (originally U.S.) television; rapidly becoming a dinosaur. I'm sure it was used in computers to make color video easier. Newer boards doubtless use much faster clocks and synthesize what the parts need. ]' -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Measuring receiver...
On Wed, 22 Jun 2016 14:07:07 -0400, you wrote: > although we had some guys who were very fast with >straight keys. And some of us who despised bugs...and still do. A vapor-tight explosion-proof aircraft key was fun... You can have my Bencher paddle when you pry it (We now return you to measuring time/frequency with insane degrees of precision, already in progress.) -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Looking for a Linux user with a Z3816/Z3815/HP5xxxx
On Mon, 23 May 2016 23:22:34 +, you wrote: >Alas, it has become very hard to email an EXE file. The ISPs are on to all >the tricks.. Just stick it on one of the free file sharing sites or in your personal web space, with nothing pointing to it except the link you send the recipient(s). Not that anything can stay hidden, but the ISP will likely leave it along. I've had an email client utility on mine for ages (no longer really needed, since the author added the functionality to later releases). Or, hey, PGP encrypt it so the NSA will store a copy and try to crack it! -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Microsonics TCXO
On Sun, 20 Mar 2016 08:47:01 -0500, you wrote: >An even better solution would have been to put them on the 'exact' same >frequency and phase, but the digital electronics and GPS frequency/timing >systems that could enable that, had not been deployed yet. Which gets you major nulls, assuming the receiver is moving. See also: WBZ/WBZA back in the day. -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Old xtal filter
On Sun, 6 Mar 2016 12:31:47 -0700, you wrote: >What could this have been used >for, with such a narrow bandwidth? Removing spurs from a 100Kc standard, perhaps? -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Generating a solid PPS from 10Mhz source
On Mon, 18 Jan 2016 20:45:20 +, you wrote: >Incandescent bulbs don't have much "hum" in their light output, >they're basically heating elements and they don't cool down nearly >fast enough. Hook photocell to an audio amp and shine a 60Hz powered lamp on it; you'll be surprised. I don't know what the modulation percentage is, but I know a flashlight lamp can be modulated with decent sounding speech audio. -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] UPS for my time rack
On Wed, 14 Oct 2015 06:34:39 +, you wrote: >They're quite neat, but I wish there were something a little less >heavy-duty for the 1-2 Amp range. For the small stuff, I use the little round plugs that come in a bunch of sizes; I've tried to standardize my shack on 5.5X2.5mm for things like a VLF upconverter and a little broadband amplifier mounted in a diecast box (Who doesn't love Digi-Key?). But I still put powerpoles with the smaller contacts on the other end to run on the shack's 12V bus. -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Vanguard Ultra precision Golden Oscillator
On Mon, 24 Aug 2015 18:18:14 -0400, you wrote: If you do drop one into a modern circuit, its worth noting that the crystal in an FT style holder has another capacitor in it when compared to the model of a modern (plated electrode) crystal. The air gap is the source of the element. Net result is that (without the toothpaste) they are a bit harder to tune. What you do is take the FT-243 holder apart and drill a hole in the side for a screw that bears on the spring that holds the crystal and metal holder sandwich together. You can get a few *Kc change varying the pressure. *proper units for the time. -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Vanguard Ultra precision Golden Oscillator
On Sun, 23 Aug 2015 12:13:47 -0400, you wrote: Thanks for your comments and I did wonder about the plating, This looks like the same package the Chinese are selling for the Kenwood TS-590 to upgrade the already good internal timebase. The reports on them are pretty good, though few have an environmental chamber to see what the compensation really does. The plating seems to cost extra. I got a break on a genuine Kenwood one, and it holds quite well in a pretty uniform cellar ham shack. When last I checked, it was about 4Hz off 10MHz WWV; not enough to take off the bottom cover and tweak. -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Newbie
On Tue, 18 Aug 2015 10:10:04 -0500, you wrote: There's a good search utility at https://www.mail-archive.com/time-nuts@febo.com/ Dave: Thanks for this; I'm searching for an earlier version of u-center, since the current one doesn't work on XP, and the ublox site doesn't have earlier versions. I just got a Chinese GPSDO to clock a late 70s-vintage counter kit I built when dinosaurs walked the land, and I'm trying to find something to talk to it. Clearly, it's _way_ better than the TCXO that came with it, or the Janel Labs oven that aged beyond adjustment range! Anyway, thanks for the pointer. I'll play for a bit before posting to the list. -- Gary Woods O- K2AHC Public keys at home.earthlink.net/~garygarlic, or get 0x1D64A93D via keyserver fingerprint = E2 6F 50 93 7B C7 F3 CA 1F 8B 3C C0 B0 28 68 0B ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Newbie
The previous was meant to go to the nice person who pointed me to some search option. Humble apologies. It wasn't even my first misteak of the day, but the others were offline. -- Gary Woods O- K2AHC Public keys at home.earthlink.net/~garygarlic, or get 0x1D64A93D via keyserver fingerprint = E2 6F 50 93 7B C7 F3 CA 1F 8B 3C C0 B0 28 68 0B ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Newbie
Before I embarrass myself in public (again), is there an archive search for the time nuts list? I'll lurk for a while before posting... -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
