Re: [time-nuts] WWVB new modulation scheme monograph
Are there any commercial products using this new phase-shift modulation scheme? Larry On 11/3/2012 4:32 PM, Charles P. Steinmetz wrote: This has probably already been posted more than once, but if anyone is still looking for a description of the new WWVB modulation scheme: http://tf.boulder.nist.gov/general/pdf/2651.pdf (Sept. 2012) ... -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ 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] WWVB new modulation scheme monograph
It depends on what you mean: First off, the phase modulation renders many existing phase tracking receivers useless. Period. A few current receivers are immune to the PSK, but they do not 'use' the PSK modulation, but they just ignore it. My understanding is, the new modulation was designed using an SBIR grant, and a proprietary chip designed and tested with taxpayer money. AFAIK there is no other source, so the company that did the SBIR now has a monopoly. -John === Are there any commercial products using this new phase-shift modulation scheme? Larry On 11/3/2012 4:32 PM, Charles P. Steinmetz wrote: This has probably already been posted more than once, but if anyone is still looking for a description of the new WWVB modulation scheme: http://tf.boulder.nist.gov/general/pdf/2651.pdf (Sept. 2012) ... -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ 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 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] WWVB new modulation scheme monograph
This has probably already been posted more than once, but if anyone is still looking for a description of the new WWVB modulation scheme: http://tf.boulder.nist.gov/general/pdf/2651.pdf (Sept. 2012) Best regards, Charles ___ 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] WWVB New Modulation scheme...
On 10/26/2012 08:26 PM, Peter Gottlieb wrote: I've used the HP 3586 for measuring AM carrier frequencies as well as my Tek 495P (both referenced to Rb) for higher frequencies such as air band. Some carriers are dead nuts on while others are quite far off (at least to my mind) although I've never found one outside of its required tolerance. It seems possible to measure pretty accurately with these instruments, at least on AM or CW signals, but not sure the best way for FM. I've played with the HP 53310A but haven't set it up for precise measurements yet, or really studied what all it is capable of. Peter On 10/26/2012 11:10 PM, Orin Eman wrote: Looks like they _might_ have been 30 _Hz_ out... I had to tune to 1188.97 to get a 1kHz beat in upper sideband mode a few minutes ago but they are within 10Hz of where they are supposed to be now - according to my radio anyway (I just checked the radio against WWV at 5MHz and it was less than 10Hz out). Orin, KJ7HQ. On Fri, Oct 26, 2012 at 7:41 PM, Bob Camp li...@rtty.us wrote: Hi Not to mention attention from the guy who *should* be 3 channels over … Bob On Oct 26, 2012, at 10:31 PM, Peter Gottlieb n...@verizon.net wrote: It would attract a lot of attention from people not finding it at the right place on the dial. On 10/26/2012 10:09 PM, Max Robinson wrote: The frequency of 1190 indicates an AM station. I assume you mean 30 Hz. An error of 30 KHz would attract a lot of attention from Charley. Regards. Max. K 4 O DS. Email: m...@maxsmusicplace.com Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Woodworking site http://www.angelfire.com/electronic/funwithtubes/Woodworking/wwindex.html Music site: http://www.maxsmusicplace.com To subscribe to the fun with transistors group send an email to. funwithtransistors-subscr...@yahoogroups.com To subscribe to the fun with tubes group send an email to, funwithtubes-subscr...@yahoogroups.com To subscribe to the fun with wood group send a blank email to funwithwood-subscr...@yahoogroups.com - Original Message - From: Chuck Forsberg WA7KGX N2469R c...@omen.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, October 26, 2012 12:14 AM Subject: Re: [time-nuts] WWVB New Modulation scheme... I have my 3586b slaved to my Thunderbolt along with a Flex-1500 radio, Racal-Dana counter, Advantest Spectrum analyzer and Gigatronics signal generator. You might be interested to know KEX 1190 in Portland is about 30 kHz low. At least they aren't spewing IBOC lately. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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 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. - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1427 / Virus Database: 2441/5355 - Release Date: 10/26/12 ___ 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 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 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. - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1427 / Virus Database: 2441/5355 - Release Date: 10/26/12 1189.9698 30 Hz low. I was confused by Bush's 500 trillion tax cut. WWV on 5 reads correct within 0.1 Hz on my CPS locked 3586b+ ___ 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. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow
Re: [time-nuts] WWVB New Modulation scheme...
The frequency of 1190 indicates an AM station. I assume you mean 30 Hz. An error of 30 KHz would attract a lot of attention from Charley. Regards. Max. K 4 O DS. Email: m...@maxsmusicplace.com Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Woodworking site http://www.angelfire.com/electronic/funwithtubes/Woodworking/wwindex.html Music site: http://www.maxsmusicplace.com To subscribe to the fun with transistors group send an email to. funwithtransistors-subscr...@yahoogroups.com To subscribe to the fun with tubes group send an email to, funwithtubes-subscr...@yahoogroups.com To subscribe to the fun with wood group send a blank email to funwithwood-subscr...@yahoogroups.com - Original Message - From: Chuck Forsberg WA7KGX N2469R c...@omen.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, October 26, 2012 12:14 AM Subject: Re: [time-nuts] WWVB New Modulation scheme... I have my 3586b slaved to my Thunderbolt along with a Flex-1500 radio, Racal-Dana counter, Advantest Spectrum analyzer and Gigatronics signal generator. You might be interested to know KEX 1190 in Portland is about 30 kHz low. At least they aren't spewing IBOC lately. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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 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] WWVB New Modulation scheme...
It would attract a lot of attention from people not finding it at the right place on the dial. On 10/26/2012 10:09 PM, Max Robinson wrote: The frequency of 1190 indicates an AM station. I assume you mean 30 Hz. An error of 30 KHz would attract a lot of attention from Charley. Regards. Max. K 4 O DS. Email: m...@maxsmusicplace.com Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Woodworking site http://www.angelfire.com/electronic/funwithtubes/Woodworking/wwindex.html Music site: http://www.maxsmusicplace.com To subscribe to the fun with transistors group send an email to. funwithtransistors-subscr...@yahoogroups.com To subscribe to the fun with tubes group send an email to, funwithtubes-subscr...@yahoogroups.com To subscribe to the fun with wood group send a blank email to funwithwood-subscr...@yahoogroups.com - Original Message - From: Chuck Forsberg WA7KGX N2469R c...@omen.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, October 26, 2012 12:14 AM Subject: Re: [time-nuts] WWVB New Modulation scheme... I have my 3586b slaved to my Thunderbolt along with a Flex-1500 radio, Racal-Dana counter, Advantest Spectrum analyzer and Gigatronics signal generator. You might be interested to know KEX 1190 in Portland is about 30 kHz low. At least they aren't spewing IBOC lately. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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 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. - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1427 / Virus Database: 2441/5355 - Release Date: 10/26/12 ___ 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] WWVB New Modulation scheme...
Hi Not to mention attention from the guy who *should* be 3 channels over … Bob On Oct 26, 2012, at 10:31 PM, Peter Gottlieb n...@verizon.net wrote: It would attract a lot of attention from people not finding it at the right place on the dial. On 10/26/2012 10:09 PM, Max Robinson wrote: The frequency of 1190 indicates an AM station. I assume you mean 30 Hz. An error of 30 KHz would attract a lot of attention from Charley. Regards. Max. K 4 O DS. Email: m...@maxsmusicplace.com Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Woodworking site http://www.angelfire.com/electronic/funwithtubes/Woodworking/wwindex.html Music site: http://www.maxsmusicplace.com To subscribe to the fun with transistors group send an email to. funwithtransistors-subscr...@yahoogroups.com To subscribe to the fun with tubes group send an email to, funwithtubes-subscr...@yahoogroups.com To subscribe to the fun with wood group send a blank email to funwithwood-subscr...@yahoogroups.com - Original Message - From: Chuck Forsberg WA7KGX N2469R c...@omen.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, October 26, 2012 12:14 AM Subject: Re: [time-nuts] WWVB New Modulation scheme... I have my 3586b slaved to my Thunderbolt along with a Flex-1500 radio, Racal-Dana counter, Advantest Spectrum analyzer and Gigatronics signal generator. You might be interested to know KEX 1190 in Portland is about 30 kHz low. At least they aren't spewing IBOC lately. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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 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. - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1427 / Virus Database: 2441/5355 - Release Date: 10/26/12 ___ 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 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] WWVB New Modulation scheme...
Looks like they _might_ have been 30 _Hz_ out... I had to tune to 1188.97 to get a 1kHz beat in upper sideband mode a few minutes ago but they are within 10Hz of where they are supposed to be now - according to my radio anyway (I just checked the radio against WWV at 5MHz and it was less than 10Hz out). Orin, KJ7HQ. On Fri, Oct 26, 2012 at 7:41 PM, Bob Camp li...@rtty.us wrote: Hi Not to mention attention from the guy who *should* be 3 channels over … Bob On Oct 26, 2012, at 10:31 PM, Peter Gottlieb n...@verizon.net wrote: It would attract a lot of attention from people not finding it at the right place on the dial. On 10/26/2012 10:09 PM, Max Robinson wrote: The frequency of 1190 indicates an AM station. I assume you mean 30 Hz. An error of 30 KHz would attract a lot of attention from Charley. Regards. Max. K 4 O DS. Email: m...@maxsmusicplace.com Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Woodworking site http://www.angelfire.com/electronic/funwithtubes/Woodworking/wwindex.html Music site: http://www.maxsmusicplace.com To subscribe to the fun with transistors group send an email to. funwithtransistors-subscr...@yahoogroups.com To subscribe to the fun with tubes group send an email to, funwithtubes-subscr...@yahoogroups.com To subscribe to the fun with wood group send a blank email to funwithwood-subscr...@yahoogroups.com - Original Message - From: Chuck Forsberg WA7KGX N2469R c...@omen.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, October 26, 2012 12:14 AM Subject: Re: [time-nuts] WWVB New Modulation scheme... I have my 3586b slaved to my Thunderbolt along with a Flex-1500 radio, Racal-Dana counter, Advantest Spectrum analyzer and Gigatronics signal generator. You might be interested to know KEX 1190 in Portland is about 30 kHz low. At least they aren't spewing IBOC lately. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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 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. - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1427 / Virus Database: 2441/5355 - Release Date: 10/26/12 ___ 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 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 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] WWVB New Modulation scheme...
I've used the HP 3586 for measuring AM carrier frequencies as well as my Tek 495P (both referenced to Rb) for higher frequencies such as air band. Some carriers are dead nuts on while others are quite far off (at least to my mind) although I've never found one outside of its required tolerance. It seems possible to measure pretty accurately with these instruments, at least on AM or CW signals, but not sure the best way for FM. I've played with the HP 53310A but haven't set it up for precise measurements yet, or really studied what all it is capable of. Peter On 10/26/2012 11:10 PM, Orin Eman wrote: Looks like they _might_ have been 30 _Hz_ out... I had to tune to 1188.97 to get a 1kHz beat in upper sideband mode a few minutes ago but they are within 10Hz of where they are supposed to be now - according to my radio anyway (I just checked the radio against WWV at 5MHz and it was less than 10Hz out). Orin, KJ7HQ. On Fri, Oct 26, 2012 at 7:41 PM, Bob Camp li...@rtty.us wrote: Hi Not to mention attention from the guy who *should* be 3 channels over … Bob On Oct 26, 2012, at 10:31 PM, Peter Gottlieb n...@verizon.net wrote: It would attract a lot of attention from people not finding it at the right place on the dial. On 10/26/2012 10:09 PM, Max Robinson wrote: The frequency of 1190 indicates an AM station. I assume you mean 30 Hz. An error of 30 KHz would attract a lot of attention from Charley. Regards. Max. K 4 O DS. Email: m...@maxsmusicplace.com Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Woodworking site http://www.angelfire.com/electronic/funwithtubes/Woodworking/wwindex.html Music site: http://www.maxsmusicplace.com To subscribe to the fun with transistors group send an email to. funwithtransistors-subscr...@yahoogroups.com To subscribe to the fun with tubes group send an email to, funwithtubes-subscr...@yahoogroups.com To subscribe to the fun with wood group send a blank email to funwithwood-subscr...@yahoogroups.com - Original Message - From: Chuck Forsberg WA7KGX N2469R c...@omen.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, October 26, 2012 12:14 AM Subject: Re: [time-nuts] WWVB New Modulation scheme... I have my 3586b slaved to my Thunderbolt along with a Flex-1500 radio, Racal-Dana counter, Advantest Spectrum analyzer and Gigatronics signal generator. You might be interested to know KEX 1190 in Portland is about 30 kHz low. At least they aren't spewing IBOC lately. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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 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. - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1427 / Virus Database: 2441/5355 - Release Date: 10/26/12 ___ 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 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 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. - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1427 / Virus Database: 2441/5355 - Release Date: 10/26/12 ___ 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] WWVB New Modulation scheme...
If I sent these thoughts before, pardon me as I'm suffering from CRS Syndrom. Part of the normal work I provide is off-air measurements of broadcast stations. Would you believe, they pay me to do this! Anyway, I measure AM carriers, FM carriers, and TV, both analog and digital pilots, as well as other stuff. For FM stations I also measure any subcarrier including the RDBS signal at 57 kHz. My method for measuring is described Here: http://www.k5cm.com/k6OQK%20FMT%20NEW.htm The methodology described here is used for primarily for AM Broadcast signals, but can be used for FM subcarriers also. Some time ago I tried measuring the RDS signal in the broadcast FM baseband With my trusty 3586B looking at the baseband of my FM receiver I tried tuning the 3586B SLM to 57 kHz and looked at the resultant 15625 Hz I.F. out of the 3586B as described in the above article. It was a useless mess. Due to the nature of the 57 kHz RDS modulation, which is not FM, I just couldn't get a meaningful measurement. Rats! One day while poking around and looking at the 57 kHz RDS signal, rather than using 20 Hz bandwidth, which is really about -3 dB at 6 Hz, I used the 3.1 kHz bandwidth position. Lo and behold, I now had a very well defined display that looked very similar to the eye pattern used for examining digital transmissions. I was allowing both sidebands into the 3586B and was now able to measure down to milliHertz resolution with no problem. All I had to do was adjust my 3336B (read the above linked article) to get the pattern to stand still as either a circle or and X on the scope. I still need to dig into this a bit farther because the RDS signal really does not have a carrier as such. It has the two sidebands depending on the phase shift determined by the data. However, I do know that RDS generators that are GPS referenced give me a stationary pattern when I'm tuned to 57000.000 Hz. The RDBS signal is supposed to be locked to the third harmonic of the 19 kHz pilot, which has a +/- 2 Hz tolerance. The truth is that they're not always locked, and I know of several stations that do not feed a Pilot reference to the RDBS generator. FM broadcast RDS injection levels are typically about 2-5 percent of +/- 75 kHz deviation, but it is not a FM signal when you look in the FM baseband. Anyway, just a thought that maybe if you look at the WWVB signal with a wider bandwidth it might be interesting. I really need to take the WWVB loop off of my Symetricom 8170 and hook it to my 3586B SLM and see for myself. For what it's worth, Burt, K6OQK Burt I. Weiner Associates Broadcast Technical Services Glendale, California U.S.A. b...@att.net www.biwa.cc K6OQK ___ 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] WWVB New Modulation scheme...
I have my 3586b slaved to my Thunderbolt along with a Flex-1500 radio, Racal-Dana counter, Advantest Spectrum analyzer and Gigatronics signal generator. You might be interested to know KEX 1190 in Portland is about 30 kHz low. At least they aren't spewing IBOC lately. -- Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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] WWVB New Modulation Scheme Compatibility
I guess that will mean that my bullet proof Tracor 599J will become a paper weight. I have a couple of units that were surplussed years ago from the USNO. Great receivers. Sam W3OHM ___ 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.
