John - It has been a while since I have seen the waveform. What is the rate of change of phase per unit time? Or, the occupied BW? Thanks - Mike
Mike B. Feher, N4FS 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of J. Forster Sent: Sunday, October 03, 2010 11:29 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 60kHz Loop antenna Since WWVB is a phase tracking system, I'm not convnced a high-Q loop is such a good idea. HP's loop for the 117A is not tuned, as I rember, but it is followed with a narrow band amp. FWIW -John =========== > Thanks Dick, Ok with interference that close it would help. Shielding > doesnt > always provide much at these frequencies and can reduce the Q of the loop. > > Best Wishes > Alan G3NYK > > ----- Original Message ----- > From: "Dick Moore" <rich...@hughes.net> > To: <time-nuts@febo.com> > Sent: Sunday, October 03, 2010 6:56 AM > Subject: Re: [time-nuts] 60kHz Loop antenna > > >> Alan, I did try a real half-a$$ed pile of wire and a tuning cap. My shop > has fluorescent lights and I got a lot of noise. Once I built the shielded > loop and got it lined up with east and a little south (I'm in Washington > State), WWVB came in gang-busters. This was before I built a GPSDO or two > and then got a TBolt. >> >> The shielded loop has just been sitting for years. >> >> Dick >> >> >> On Oct 2, 2010, at 3:42 PM, time-nuts-requ...@febo.com wrote: >> > >> > Message: 5 >> > Date: Sat, 2 Oct 2010 23:40:52 +0100 >> > From: "Alan Melia" <alan.me...@btinternet.com> >> > Subject: Re: [time-nuts] HP/Dymek DY-5842 >> > To: "Discussion of precise time and frequency measurement" >> > <time-nuts@febo.com> >> > Message-ID: <015501cb6283$10071ad0$4001a...@lark> >> > Content-Type: text/plain; charset="iso-8859-1" >> > >> > Dick did you ever try an unscreened loop ?? they should be just as >> good > if >> > not better at 60kHz. >> > Alan G3NYK >> > >> > ----- Original Message ----- >> > From: "Dick Moore" <rich...@hughes.net> >> > To: <time-nuts@febo.com> >> > Sent: Saturday, October 02, 2010 11:22 PM >> > Subject: Re: [time-nuts] HP/Dymek DY-5842 >> > >> > >> >> I used to have one of these marvelous receivers and sold it. I still > have >> > the WWVB/60kHz shielded loop antenna that I made for it and although >> it > is >> > big, at about 30" x 30" x 2" or so, I believe it will ship FedEx or >> UPS > OK. >> > It's free to anyone who'll pay the shipping. It's made out of copper > pipe >> > and works quite well, and is tuned for the 5842 at 60kHz. >> >> >> >> Best, >> >> Dick Moore >> >> >> >> >> >> On Oct 1, 2010, at 3:50 PM, time-nuts-requ...@febo.com wrote: >> >> >> >> >> >>> Message: 5 >> >>> Date: Fri, 01 Oct 2010 16:34:57 -0600 >> >>> From: ziggy9 <zig...@pumpkinbrook.com> >> >>> Subject: [time-nuts] Possibly OT - Any interest in a vintage >> HP/Dymec >> >>> DY-5842 VLF receiver? >> >>> To: <time-nuts@febo.com> >> >>> Message-ID: <990bd60b3c5d084910c10c8855912...@pumpkinbrook.com> >> >>> Content-Type: text/plain; charset=UTF-8 >> >>> >> >>> >> >>> Fellow time-nuts: >> >>> I've got a circa 1964 DY-5842 VLF receiver. This is (was) operated >> in >> >>> conjunction with an external time interval counter to make a >> frequency >> >>> comparison. So you would select WWVL for example, and use that as >> your >> >>> primary standard for comparison to your local standard. It's got 5 >> > crystals >> >>> in it: 16, 18, 19.8, 20, and 60 kHz (listed as GBR, NBA, NPM, WWVL, >> > WWVB). >> >>> It works and I have the manual. The thing is, the interest in > something >> >>> like this is bound to be a bit narrow, so I thought I'd mention it > here. >> >>> >> >>> So if there are any collectors, equipment museums, etc. that might >> be >> >>> interested in this, please let me know. I'm a bit sentimental about > this >> >>> thing, it's sort of a bit of history, and from what I can tell, > somewhat >> >>> rare (doesnt make it worth anything though :). Since it's a bit of a >> >>> curiosity, I'd like to pass it to someone that might be interested >> in > it >> >>> rather than just tossing it. I can always provide more details to > anyone >> >>> that wants them. >> >>> >> >>> Best regards, >> >>> Paul Davis - K9MR >> >>> >> >>> >> >>> >> >>> >> >>> ------------------------------ >> >>> >> >>> Message: 6 >> >>> Date: Fri, 1 Oct 2010 18:42:16 -0400 >> >>> From: "jmfranke" <jmfra...@cox.net> >> >>> Subject: Re: [time-nuts] Possibly OT - Any interest in a vintage >> >>> HP/Dymec DY-5842 VLF receiver? >> >>> To: "Discussion of precise time and frequency measurement" >> >>> <time-nuts@febo.com> >> >>> Message-ID: <b7ea2d4ab6f34ab19da25cfdc85a6...@franke> >> >>> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; >> >>> reply-type=original >> >>> >> >>> I am very interested. Do you have any images? >> >>> >> >>> John Franke WA4WDL >> >>> Portsmouth, VA 23703 >> >>> >> >>> -------------------------------------------------- >> >>> From: "ziggy9" <zig...@pumpkinbrook.com> >> >>> Sent: Friday, October 01, 2010 6:34 PM >> >>> To: <time-nuts@febo.com> >> >>> Subject: [time-nuts] Possibly OT - Any interest in a vintage >> HP/Dymec >> >>> DY-5842 VLF receiver? >> >>> >> >>>> >> >>>> Fellow time-nuts: >> >>>> I've got a circa 1964 DY-5842 VLF receiver. This is (was) operated >> in >> >>>> conjunction with an external time interval counter to make a > frequency >> >>>> comparison. So you would select WWVL for example, and use that as > your >> >>>> primary standard for comparison to your local standard. It's got 5 >> >>>> crystals >> >>>> in it: 16, 18, 19.8, 20, and 60 kHz (listed as GBR, NBA, NPM, WWVL, >> > WWVB). >> >>>> It works and I have the manual. The thing is, the interest in > something >> >>>> like this is bound to be a bit narrow, so I thought I'd mention it >> > here. >> >>>> >> >>>> So if there are any collectors, equipment museums, etc. that might >> be >> >>>> interested in this, please let me know. I'm a bit sentimental about >> > this >> >>>> thing, it's sort of a bit of history, and from what I can tell, >> > somewhat >> >>>> rare (doesnt make it worth anything though :). Since it's a bit of >> a >> >>>> curiosity, I'd like to pass it to someone that might be interested >> in >> > it >> >>>> rather than just tossing it. I can always provide more details to >> > anyone >> >>>> that wants them. >> >>>> >> >>>> Best regards, >> >>>> Paul Davis - K9MR >> >>>> >> >>>> >> >>>> _______________________________________________ >> >>>> 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. >> >>>> >> >>> >> >>> >> >>> >> >>> >> >>> ------------------------------ >> >>> >> >>> Message: 7 >> >>> Date: Fri, 01 Oct 2010 17:50:17 -0500 >> >>> From: Brian Kirby <kilodelta4foxm...@gmail.com> >> >>> Subject: Re: [time-nuts] Possibly OT - Any interest in a vintage >> >>> HP/Dymec DY-5842 VLF receiver? >> >>> To: Discussion of precise time and frequency measurement >> >>> <time-nuts@febo.com> >> >>> Message-ID: <4ca665a9.1090...@gmail.com> >> >>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed >> >>> >> >>> You might consider contacting Dr. Ken Kuhn -- >> kennathak...@gmail.com >> >>> >> >>> check his HP museum at http://www.kennethkuhn.com/hpmuseum/ >> >>> >> >>> Brian Kirby KD4FM >> >>> >> >>> >> >>> >> >>> On 10/1/2010 5:34 PM, ziggy9 wrote: >> >>>> >> >>>> Fellow time-nuts: >> >>>> I've got a circa 1964 DY-5842 VLF receiver. This is (was) operated >> in >> >>>> conjunction with an external time interval counter to make a > frequency >> >>>> comparison. So you would select WWVL for example, and use that as > your >> >>>> primary standard for comparison to your local standard. It's got 5 >> > crystals >> >>>> in it: 16, 18, 19.8, 20, and 60 kHz (listed as GBR, NBA, NPM, WWVL, >> > WWVB). >> >>>> It works and I have the manual. The thing is, the interest in > something >> >>>> like this is bound to be a bit narrow, so I thought I'd mention it >> > here. >> >>>> >> >>>> So if there are any collectors, equipment museums, etc. that might >> be >> >>>> interested in this, please let me know. I'm a bit sentimental about >> > this >> >>>> thing, it's sort of a bit of history, and from what I can tell, >> > somewhat >> >>>> rare (doesnt make it worth anything though :). Since it's a bit of >> a >> >>>> curiosity, I'd like to pass it to someone that might be interested >> in >> > it >> >>>> rather than just tossing it. I can always provide more details to >> > anyone >> >>>> that wants them. >> >>>> >> >>>> Best regards, >> >>>> Paul Davis - K9MR >> >>>> >> >>>> >> >>>> _______________________________________________ >> >>>> 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 >> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> > >> > End of time-nuts Digest, Vol 75, Issue 4 >> > **************************************** >> >> >> _______________________________________________ >> 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. _______________________________________________ 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.