Re: [time-nuts] Further FA-2 Testing
Not much, except that it provides handy calibration/measurement points. 73, Dick, W1KSZ On Sun, Oct 13, 2019, 12:46 PM Hal Murray wrote: > > dickw1...@gmail.com said: > > provide frequencies at 72.5, 725 and 7,975 MHz that are > > What's interesting about 72.5, 725, or 7975 MHz? > > > -- > These are my opinions. I hate spam. > > > > > ___ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] Used ESE ES-911/GPS/NTP Master Time Clock
The eBay auction number : 223703183757 gb Sent from iPad Air > On Oct 13, 2019, at 5:07 PM, Gregory Beat wrote: > > > Time Nuts — > > Used (surplus) ES-911/GPS/NTP units have appeared on eBay from an east coast > reseller. These units were likely surplussed, due to 1024 week rollover > issues (GPS). > NTP and PSAP usage (911 centers) require an accurate date. > > Two nice photos (on auction page) show inside of the rack cabinet. > > ESE ES-911 Product Sheet (copy not downloadable, from ESE web site) > http://a2dcorp.us/pdf/ese/ES-911%2520GPS%2520NTP.pdf > > After you have purchased ES-911/GPS/NTP, Contact ESE Support (with product > SN). > ESE can provide (via email) the PDF of Product Manual with Schematic diagram > and Parts List. BONUS: Parts are listed for the Options (ESE uses common > PCB). > == > Greg, w9gb > Chicago > > Sent from iPad Air ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] Used ESE ES-911/GPS/NTP Master Time Clock
Time Nuts — The ESE ES-911/GPS/NTP unit was specifically designed to meet the National Emergency Number Association (NENA) Standard NENA-04-002 for a Public Safety Answering Point (PSAP) Master Clock. It traditionally provides “Time Synchronizing” all components of a PSAP. == Used (surplus) ES-911/GPS/NTP units have appeared on eBay from an east coast reseller. These units were likely surplussed, due to 1024 week rollover issues (GPS). NTP and PSAP usage (911 centers) require an accurate date. Two nice photos (on auction page) show inside of the rack cabinet. Some Highlights: * This ES-911/GPS/NTP model was replaced by ES-911E (new features, components) by the “ES-911E” production model. Newer model has disciplined 10 MHz option (K-option). * Rack mount enclosure. Plenty of Room for a DIY addition. * Units are powered by 6 Volts AC (coaxial connector, rear panel). * 12-channel GPS receiver (ESE normally used Motorola M12(+) receivers). Contact Art Sepin at Synergy for 1024 rollover or multi-GNSS receiver replacement. https://synergy-gps.com/products/gps/timing-boards-modules/ * 10Base-T port (10 Mbps) for Network Time Protocol (NTP) usage. ESE formally use WizNet for that plug-in PCB (current vendor ?). ES-911 can serve as local time server (NTP) for home network (TCP/IP). * 6 Volt battery (under aluminum bracket in eBay photos), Digi-Key P128-ND, Panasonic LC-R061R3P Assume the battery is dead and replace with fresh one, $12.84 USD * Unit has 1 PPS as well as time-code outputs for remote time displays (useful). ESE ES-911 Product Sheet (copy not downloadable, from ESE web site) http://a2dcorp.us/pdf/ese/ES-911%2520GPS%2520NTP.pdf After you have purchased ES-911/GPS/NTP, Contact ESE Support (with product SN). ESE can provide (via email) the PDF of Product Manual with Schematic diagram and Parts List. BONUS: Parts are listed for the Options (ESE uses common PCB). Firmware is password protected (ESE intellectual property) and Flashed/EEPROM in the often Intel MCS-51 (8051) processor. == Greg, w9gb Chicago Sent from iPad Air ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] Further FA-2 Testing
dickw1...@gmail.com said: > provide frequencies at 72.5, 725 and 7,975 MHz that are What's interesting about 72.5, 725, or 7975 MHz? -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] FA-2 Operator manual
Didier has allowed .doc and .docx documents. I've uploaded Perrier's .docx so the set is complete. Don On 2019-10-12 16:33, Perry Sandeen via time-nuts wrote: Yo Bubba Dudes!, For those who may be interested, I D/L djl's FA-2 manual and revised both pictures and text. Don said he would post it for me on the KO4BB site as I haven't had good luck uploading stuff. Regards, Perrier ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there. -- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX: 406-626-4304 ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] Further FA-2 Testing
I use a GPSDO as my lab standard and as the reference for my Freq Counters. I have another "Box" I picked up that will accept a 10 MHz signal from my GPSDO and provide frequencies at 72.5, 725 and 7,975 MHz that are locked to the GPSDO. After sufficient warm-up I was surprised to see the FA-2 would count the 7,975 MHz signal (accurately). So it seems the FA-2's upper frequency limit is a tad higher than spec'ed. 73, Dick, W1KSZ ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] Question for my new GPSDO Heater
Hello: proportional controllers from the Old Country are also available for around $15 on ebay. The one i have uses type K thermocouple. Don On 2019-10-12 18:13, Perry Sandeen via time-nuts wrote: Yo Bubba Dudes!, The suggestion was made to use a ebay item number 192112054053 heater for this project. Now it's cheap and has a digital reading. BUT It is a bang- bang controller using a relay. At some point that relay will stop working. Also all designs I've seen for good temperature control use proportional solid state controllers. There are plenty of free designs on the internet. Lastly, if one believes that this is long term reliable controller that will deliver .1 degree accuracy, for that price, please contact me off line and I will set you up with some really cheap (but slightly scorched and a burned wood smell) lots to where you can build your dream home here in California. Regards, Perrier ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there. -- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX: 406-626-4304 ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
Re: [time-nuts] Question for my new GPSDO Heater
I created a temperature test setup for my TCXOs. Relay control did not last long because the relay was operating once a second or so and the Peltier uses a lot of current. The relay contacts welded in a few hours. Luckily I was watching when it happened. A PID controller running H bridges works a lot better to control the temperature accurately. I made a custom control algorithm that ramps the temperature up and down and takes frequency readings. There are temperature control algorithms that are supposed to automatically tune the system gains, but I have not tried them. https://sites.google.com/site/markstcxo/home/test-jig 73, Mark W7MLG On Sat, Oct 12, 2019 at 7:00 PM Perry Sandeen via time-nuts < time-nuts@lists.febo.com> wrote: > Yo Bubba Dudes!, > The suggestion was made to use a ebay item number 192112054053 heater for > this project. > Now it's cheap and has a digital reading. > BUT > It is a bang- bang controller using a relay. At some point that relay > will stop working. Also all designs I've seen for good temperature control > use proportional solid state controllers. There are plenty of free designs > on the internet. > Lastly, if one believes that this is long term reliable controller that > will deliver .1 degree accuracy, for that price, please contact me off line > and I will set you up with some really cheap (but slightly scorched and a > burned wood smell) lots to where you can build your dream home here in > California. > Regards, > Perrier > > > > ___ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
[time-nuts] FA-2 questions
No, the power switch turns off all power. See my post about the warm up characteristics of the FA2 OCXO: http://lists.febo.com/pipermail/time-nuts_lists.febo.com/2019-October/097803.html --- >First, does the internal OCXO run when the power is turned off? ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
