Re: [Repeater-Builder] Re: crystal alignment (how accurate is accurate)
At 11:03 PM 12/3/03 -0500, you wrote: Ian, you should have time standard frequencies in Australia on 5 10 and 15 MHz. If you have a secondary receiver, tune in the 10 MHz and compare it to the output of the 10 MHz timebase in your service monitor. This has been one of my obsessions for a while now, to find a way of more accurately setting my 10 MHz timebase in my service monitor. Zero beating with our WWV signal will only get you within a cycle or so. (i.e., one cycle off at 10 MHz equals 40 hertz error at 400 MHz) And then there's trying to find a time when the signal is strong and doesn't fade too much. Since I live about 50 miles south of Ft Collins you would think I would have a strong signal all the time, but no. So I figure there must be a way to use a scope to compare two audio signals (X/Y like we do with PL tones) and be able to set it more accurately. I have tried comparing the 1000 cycle audio tone from an external receiver when I generate a signal from the service monitor I kc off frequency from WWV. Then comparing that to the 1kc tone generated from the monitors own PL tone generator (phase locked to the 10 MHz time bases). You should be able to see a slow drift between the two on the oscilloscope but so far no success, too much noise to see much. Does someone have a way of getting closer than 1 cycle? (no I haven't bought a GPS timebase receiver yet but have drooled over them on Ebay. I've always wondered if a tuned RF receiver using 10 MHz crystals for IF filters would give you a strong 10 MHz carrier that could be used for calibration. Hopefully this is still somewhat on topic since we all need to set our repeaters on frequency. Art - KC7GF Golden, CO One technique that I overheard a local NBC engineer discussing was that he took advantage of the fact that the TV transmitter video carrier was phase-locked to a rubidium standard. He first zero-beated 10mhz WWV with his service monitor then switched over to the video carrier of the TV station and fine tweaked the service monitor's time base. If you know any local TV engineers it would be worth asking if any have rubidium- locked transmitters. Just an idea that I overheard, I haven't tried it. Or measure the color burst crystal in a TV set - it has to be dead-on to 3.579-something-or-other mhz or the colors shift. Mike WA6ILQ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate)
Not using the frame syncsusing the actual RF carrier! Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Rod Lane [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 10:55 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Used to be... In the good old days before frame syncs, you could wait until the local affiliate was in network programming and you had a REAL good 3.58 reference. Not so anymore. 3.579545 was an easy number to remember for some reason... ;^) 73 de N1FNE -Original Message- From: Gregg Lengling [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 11:07 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Another couple ways to calibrate: I use a GPS receiver with an 10 meg output to calibrate my service monitor. Before GPS just find out if you have a TV station that is using a Rubidium Standard for their frequency. Here in Milwaukee Ch4 uses one and we always used it to check calibration in the field, the standard was at 67.24 MHz, a lot better than using 10 megsmuch higher order of precision. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 10:04 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Ian, you should have time standard frequencies in Australia on 5 10 and 15 MHz. If you have a secondary receiver, tune in the 10 MHz and compare it to the output of the 10 MHz timebase in your service monitor. This has been one of my obsessions for a while now, to find a way of more accurately setting my 10 MHz timebase in my service monitor. Zero beating with our WWV signal will only get you within a cycle or so. (i.e., one cycle off at 10 MHz equals 40 hertz error at 400 MHz) And then there's trying to find a time when the signal is strong and doesn't fade too much. Since I live about 50 miles south of Ft Collins you would think I would have a strong signal all the time, but no. So I figure there must be a way to use a scope to compare two audio signals (X/Y like we do with PL tones) and be able to set it more accurately. I have tried comparing the 1000 cycle audio tone from an external receiver when I generate a signal from the service monitor I kc off frequency from WWV. Then comparing that to the 1kc tone generated from the monitors own PL tone generator (phase locked to the 10 MHz time bases). You should be able to see a slow drift between the two on the oscilloscope but so far no success, too much noise to see much. Does someone have a way of getting closer than 1 cycle? (no I haven't bought a GPS timebase receiver yet but have drooled over them on Ebay. I've always wondered if a tuned RF receiver using 10 MHz crystals for IF filters would give you a strong 10 MHz carrier that could be used for calibration. Hopefully this is still somewhat on topic since we all need to set our repeaters on frequency. Art - KC7GF Golden, CO Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] Will Keep You Regular....
http://www.endruntechnologies.com/frequency-control.htm Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ attachment: winmail.dat
Re: [[Repeater-Builder] Spectrum Communication SCR1000 VHF Manual]]
HI Coy Please send your email addy.off list. Joe /KE4WDP [EMAIL PROTECTED] - Original Message - From: ac0y5 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Wednesday, December 03, 2003 9:05 PM Subject: Re: [[Repeater-Builder] Spectrum Communication SCR1000 VHF Manual]] Hi Joe, Yep, I know I worked on the entire GE line when the entire line came out MASTRII, EXECII, MVP and MASTR PE HT. The MASTR EXECII is similar to the MVP or vice versa. 73 Coy --- In Repeater-Builder@yahoogroups.com, Jim [EMAIL PROTECTED] wrote: Joe Cody wrote: Hi Coy. I have a master2 exec.converted to a repeater. Just FYI-Mastr II and Exec II are two different radios. Which do you have? -- Jim The higher you are, the harder it is to pump. -Cleveland Mayor Jane Cambell, after the big black-out of 2003 Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate)
From: Rod Lane [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 10:55 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Used to be... In the good old days before frame syncs, you could wait until the local affiliate was in network programming and you had a REAL good 3.58 reference. Not so anymore. 3.579545 was an easy number to remember for some reason... ;^) Yes it is - 357-9545 is a friend's phone number. Yes, he is a TV broadcast engineer. Yes, he asked for that particular residence number. Mike WA6ILQ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: crystal alignment (how accurate is accurate)
Thank you very much Ian Wells - Original Message - From: Gregg Lengling [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 04, 2003 2:06 PM Subject: RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Another couple ways to calibrate: I use a GPS receiver with an 10 meg output to calibrate my service monitor. Before GPS just find out if you have a TV station that is using a Rubidium Standard for their frequency. Here in Milwaukee Ch4 uses one and we always used it to check calibration in the field, the standard was at 67.24 MHz, a lot better than using 10 megsmuch higher order of precision. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 10:04 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Ian, you should have time standard frequencies in Australia on 5 10 and 15 MHz. If you have a secondary receiver, tune in the 10 MHz and compare it to the output of the 10 MHz timebase in your service monitor. This has been one of my obsessions for a while now, to find a way of more accurately setting my 10 MHz timebase in my service monitor. Zero beating with our WWV signal will only get you within a cycle or so. (i.e., one cycle off at 10 MHz equals 40 hertz error at 400 MHz) And then there's trying to find a time when the signal is strong and doesn't fade too much. Since I live about 50 miles south of Ft Collins you would think I would have a strong signal all the time, but no. So I figure there must be a way to use a scope to compare two audio signals (X/Y like we do with PL tones) and be able to set it more accurately. I have tried comparing the 1000 cycle audio tone from an external receiver when I generate a signal from the service monitor I kc off frequency from WWV. Then comparing that to the 1kc tone generated from the monitors own PL tone generator (phase locked to the 10 MHz time bases). You should be able to see a slow drift between the two on the oscilloscope but so far no success, too much noise to see much. Does someone have a way of getting closer than 1 cycle? (no I haven't bought a GPS timebase receiver yet but have drooled over them on Ebay. I've always wondered if a tuned RF receiver using 10 MHz crystals for IF filters would give you a strong 10 MHz carrier that could be used for calibration. Hopefully this is still somewhat on topic since we all need to set our repeaters on frequency. Art - KC7GF Golden, CO Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: crystal alignment (how accurate is accurate)
Thank you very much Ian Wells - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 04, 2003 2:03 PM Subject: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Ian, you should have time standard frequencies in Australia on 5 10 and 15 MHz. If you have a secondary receiver, tune in the 10 MHz and compare it to the output of the 10 MHz timebase in your service monitor. This has been one of my obsessions for a while now, to find a way of more accurately setting my 10 MHz timebase in my service monitor. Zero beating with our WWV signal will only get you within a cycle or so. (i.e., one cycle off at 10 MHz equals 40 hertz error at 400 MHz) And then there's trying to find a time when the signal is strong and doesn't fade too much. Since I live about 50 miles south of Ft Collins you would think I would have a strong signal all the time, but no. So I figure there must be a way to use a scope to compare two audio signals (X/Y like we do with PL tones) and be able to set it more accurately. I have tried comparing the 1000 cycle audio tone from an external receiver when I generate a signal from the service monitor I kc off frequency from WWV. Then comparing that to the 1kc tone generated from the monitors own PL tone generator (phase locked to the 10 MHz time bases). You should be able to see a slow drift between the two on the oscilloscope but so far no success, too much noise to see much. Does someone have a way of getting closer than 1 cycle? (no I haven't bought a GPS timebase receiver yet but have drooled over them on Ebay. I've always wondered if a tuned RF receiver using 10 MHz crystals for IF filters would give you a strong 10 MHz carrier that could be used for calibration. Hopefully this is still somewhat on topic since we all need to set our repeaters on frequency. Art - KC7GF Golden, CO Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: crystal alignment (how accurate is accurate)
If you are looking at the 3.58 MHz on demodulated video, then you are looking at a framesync. In today's world of broadcasting, the consumer TV's will be much more forgiving of the 3.58 drift and still lock on to it, so its accuracy is not as important as it was back in the day. Knowing what I do about the TV station I work for, I would NOT use that as a reference. I don't think I have ever checked our 3.58 for accuracy. The FCC is MUCH more relaxed about TV standards than they were 20 years ago. If you have a 'top notch' station with a rubidium or GPS based frequency standard, then using the carrier (not demodulated 3.58 video) will get you a good reference. --John - Original Message - From: Gregg Lengling [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 04, 2003 7:02 AM Subject: RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Not using the frame syncsusing the actual RF carrier! Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Rod Lane [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 10:55 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Used to be... In the good old days before frame syncs, you could wait until the local affiliate was in network programming and you had a REAL good 3.58 reference. Not so anymore. 3.579545 was an easy number to remember for some reason... ;^) 73 de N1FNE - Original Message - From: Steve S. Bosshard (NU5D) [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 04, 2003 1:16 AM Subject: RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) I remember an old QST article about the 3.58 Mhz color burst sig on network tv being tracable to NBS. If I remember correctly the sets are phase locked to the incoming sig? Never was much at TV.. -Original Message- From: Gregg Lengling [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 11:07 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Another couple ways to calibrate: I use a GPS receiver with an 10 meg output to calibrate my service monitor. Before GPS just find out if you have a TV station that is using a Rubidium Standard for their frequency. Here in Milwaukee Ch4 uses one and we always used it to check calibration in the field, the standard was at 67.24 MHz, a lot better than using 10 megsmuch higher order of precision. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 10:04 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Ian, you should have time standard frequencies in Australia on 5 10 and 15 MHz. If you have a secondary receiver, tune in the 10 MHz and compare it to the output of the 10 MHz timebase in your service monitor. This has been one of my obsessions for a while now, to find a way of more accurately setting my 10 MHz timebase in my service monitor. Zero beating with our WWV signal will only get you within a cycle or so. (i.e., one cycle off at 10 MHz equals 40 hertz error at 400 MHz) And then there's trying to find a time when the signal is strong and doesn't fade too much. Since I live about 50 miles south of Ft Collins you would think I would have a strong signal all the time, but no. So I figure there must be a way to use a scope to compare two audio signals (X/Y like we do with PL tones) and be able to set it more accurately. I have tried comparing the 1000 cycle audio tone from an external receiver when I generate a signal from the service monitor I kc off frequency from WWV. Then comparing that to the 1kc tone generated from the monitors own PL tone generator (phase locked to the 10 MHz time bases). You should be able to see a slow drift between the two on the oscilloscope but so far no success, too much noise to see much. Does someone have a way of getting closer than 1 cycle? (no I haven't bought a GPS timebase receiver yet but have drooled over them on Ebay. I've always wondered if a tuned RF receiver using 10 MHz crystals for IF filters would give you a strong 10 MHz carrier that could be used for calibration. Hopefully this is still somewhat on topic since we
Re: [Repeater-Builder] Re: crystal alignment (how accurate is accurate)
Thank you Ian Wells - Original Message - From: Mike Morris WA6ILQ [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 04, 2003 6:25 PM Subject: Re: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) At 11:03 PM 12/3/03 -0500, you wrote: Ian, you should have time standard frequencies in Australia on 5 10 and 15 MHz. If you have a secondary receiver, tune in the 10 MHz and compare it to the output of the 10 MHz timebase in your service monitor. This has been one of my obsessions for a while now, to find a way of more accurately setting my 10 MHz timebase in my service monitor. Zero beating with our WWV signal will only get you within a cycle or so. (i.e., one cycle off at 10 MHz equals 40 hertz error at 400 MHz) And then there's trying to find a time when the signal is strong and doesn't fade too much. Since I live about 50 miles south of Ft Collins you would think I would have a strong signal all the time, but no. So I figure there must be a way to use a scope to compare two audio signals (X/Y like we do with PL tones) and be able to set it more accurately. I have tried comparing the 1000 cycle audio tone from an external receiver when I generate a signal from the service monitor I kc off frequency from WWV. Then comparing that to the 1kc tone generated from the monitors own PL tone generator (phase locked to the 10 MHz time bases). You should be able to see a slow drift between the two on the oscilloscope but so far no success, too much noise to see much. Does someone have a way of getting closer than 1 cycle? (no I haven't bought a GPS timebase receiver yet but have drooled over them on Ebay. I've always wondered if a tuned RF receiver using 10 MHz crystals for IF filters would give you a strong 10 MHz carrier that could be used for calibration. Hopefully this is still somewhat on topic since we all need to set our repeaters on frequency. Art - KC7GF Golden, CO One technique that I overheard a local NBC engineer discussing was that he took advantage of the fact that the TV transmitter video carrier was phase-locked to a rubidium standard. He first zero-beated 10mhz WWV with his service monitor then switched over to the video carrier of the TV station and fine tweaked the service monitor's time base. If you know any local TV engineers it would be worth asking if any have rubidium- locked transmitters. Just an idea that I overheard, I haven't tried it. Or measure the color burst crystal in a TV set - it has to be dead-on to 3.579-something-or-other mhz or the colors shift. Mike WA6ILQ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: crystal alignment (how accurate is accurate)
Thank you verymuch Ian Wells - Original Message - From: Rod Lane [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 04, 2003 2:55 PM Subject: RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Used to be... In the good old days before frame syncs, you could wait until the local affiliate was in network programming and you had a REAL good 3.58 reference. Not so anymore. 3.579545 was an easy number to remember for some reason... ;^) 73 de N1FNE -Original Message- From: Gregg Lengling [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 11:07 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Another couple ways to calibrate: I use a GPS receiver with an 10 meg output to calibrate my service monitor. Before GPS just find out if you have a TV station that is using a Rubidium Standard for their frequency. Here in Milwaukee Ch4 uses one and we always used it to check calibration in the field, the standard was at 67.24 MHz, a lot better than using 10 megsmuch higher order of precision. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 10:04 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Ian, you should have time standard frequencies in Australia on 5 10 and 15 MHz. If you have a secondary receiver, tune in the 10 MHz and compare it to the output of the 10 MHz timebase in your service monitor. This has been one of my obsessions for a while now, to find a way of more accurately setting my 10 MHz timebase in my service monitor. Zero beating with our WWV signal will only get you within a cycle or so. (i.e., one cycle off at 10 MHz equals 40 hertz error at 400 MHz) And then there's trying to find a time when the signal is strong and doesn't fade too much. Since I live about 50 miles south of Ft Collins you would think I would have a strong signal all the time, but no. So I figure there must be a way to use a scope to compare two audio signals (X/Y like we do with PL tones) and be able to set it more accurately. I have tried comparing the 1000 cycle audio tone from an external receiver when I generate a signal from the service monitor I kc off frequency from WWV. Then comparing that to the 1kc tone generated from the monitors own PL tone generator (phase locked to the 10 MHz time bases). You should be able to see a slow drift between the two on the oscilloscope but so far no success, too much noise to see much. Does someone have a way of getting closer than 1 cycle? (no I haven't bought a GPS timebase receiver yet but have drooled over them on Ebay. I've always wondered if a tuned RF receiver using 10 MHz crystals for IF filters would give you a strong 10 MHz carrier that could be used for calibration. Hopefully this is still somewhat on topic since we all need to set our repeaters on frequency. Art - KC7GF Golden, CO Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: crystal alignment (how accurate is accurate)
Thank you verymuch Ian Wells - Original Message - From: Steve S. Bosshard (NU5D) [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 04, 2003 4:16 PM Subject: RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) I remember an old QST article about the 3.58 Mhz color burst sig on network tv being tracable to NBS. If I remember correctly the sets are phase locked to the incoming sig? Never was much at TV.. Ssb Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] Communication Monitor
Hello, I am looking for a communication monitor, preferably IFR. Can anyone point me in the right direction. Ken ve3oks Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Communication Monitor
eBay??? -Original Message- From: ve3oks [mailto:[EMAIL PROTECTED] Sent: Thursday, December 04, 2003 9:01 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Communication Monitor Hello, I am looking for a communication monitor, preferably IFR. Can anyone point me in the right direction. Ken ve3oks Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Passive repeaters
I would say the repeater system preformance is not nearly as good at it could/should be. For the most part 9 miles should be a cake walk on a well done VHF system as long as the portables have min 4 watt output. I would first turn my attention back to the repeater and antenna system. cheers skipp skipp025 at yahoo dot com chiefsfan [EMAIL PROTECTED] wrote: Our city PD is responsible for security at the airport which is 9 miles from the city and thier vhf repeater. They are having trouble getting into the repeater from inside the building but can reach ok outside the building. Does the group think a passive repeater might do the job for them with a yagi on the roof and a short piece of good quility coax and a quarter wave in the building? Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: UHF Links with Voters
Thanks Steve, Was hoping to find a UHF link system I could run continuously to eliminate the delay and noise (and not burn up!). Good info though, I didn't think the voter would work well with the initial noise on remote key up. I wanted to use the Doug Hall voter too. I also like your initials ... SSB thats great to have in the ham business! Thanks, Frank, KO5S --- In Repeater-Builder@yahoogroups.com, Steve S. Bosshard \(NU5D\) [EMAIL PROTECTED] wrote: I am not using tone supervision - have 3 remote receivers (GE Phoenix) on 146.22 and 438 Mhz links back to the repeater. Use CTCSS on both the 146.22 rx and the links. The links come up on RUS, and the Voter looks for a COR line. The delay IS noticeable, but not a serious impediment. The first 100 ms or so is noisy until the satellite receiver starts working. Doug Hall 4V system. Ssb Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Communication Monitor
EBAY, but BE SURE the monitor has all the features you need, sometimes can be confusing. I like having the tracking generator in my IFR for tuning cavities and duplexers. Not all of them have it since it is an option. Frank, KO5S --- In Repeater-Builder@yahoogroups.com, ve3oks [EMAIL PROTECTED] wrote: Hello, I am looking for a communication monitor, preferably IFR. Can anyone point me in the right direction. Ken ve3oks Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Communication Monitor
EBAY, but BE SURE the monitor has all the features you need, sometimes can be confusing. I like having the tracking generator in my IFR for tuning cavities and duplexers. Not all of them have it since it is an option. Frank, KO5S --- In Repeater-Builder@yahoogroups.com, ve3oks [EMAIL PROTECTED] wrote: Hello, I am looking for a communication monitor, preferably IFR. Can anyone point me in the right direction. Ken ve3oks Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] TX/RX BpBr cavity For Sale
TX/RX BpBr cavity For Sale removed from a transmit combiner system. rated UHF, 450-470 pretty big - about 10 in diameter and 30 tall... i sold a few to Kevin - he can probably provide more info than i can - overall appearance is a little dirty with some pitting of the aluminum - but on the ones i drilled the rivets out - the insides were just fine. taking sane offers doug Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Passive repeaters
chiefsfan wrote: Our city PD is responsible for security at the airport which is 9 miles from the city and thier vhf repeater. They are having trouble getting into the repeater from inside the building but can reach ok outside the building. Does the group think a passive repeater might do the job for them with a yagi on the roof and a short piece of good quility coax and a quarter wave in the building? Are you talking about inside a concourse? If so, I would use a pair of yagis pointed up and down the length instead of an omni. Or one yagi at each end pointed towards the middle, with a sepearate donor antenna on each. And in any event, the more gain on both antennas, and the less loss in the coax, the better. -- Jim The higher you are, the harder it is to pump. -Cleveland Mayor Jane Cambell, after the big black-out of 2003 Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] RE: Re: crystal alignment (how accurate is accurate)
Way back in 1964 I worked in a two-way shop part-time while in college. We also sold and serviced Amateur Radio gear. The other techs and I built a receiver set-up for doing frequency measurements out of two similar short wave receivers. One receiver was the master receiver for WWV (or other frequency of interest) and the other was used for picking up the oscillator under test. The master receiver had a cathode follower on its VFO which fed the secondary receiver's mixer. ( The secondary receiver's VFO was disabled) One of the receiver's last IF stage was coupled to the vertical input of an oscilloscope and the other was coupled to the horizontal input. It was very easy to watch the Lissajous pattern on the scope and set a very good zero beat. It was very easy to see beat notes of 0.01 Hz. or better if you wanted to sit there that long and watch it. With a 10 mhz. reference that would be 1/2 cycle at UHF, probably close enough for most applications. It was also very cool to watch the permutations of the atmosphere on the signal from WWV. We could also look at any HF frequency besides WWV on 10 Mhz. Back then WWV had standards all the way to 25 Mhz. Then there is CHU. Also usable for ARRL's FMT. Maybe I'll put another one of these together. (Solid state this time) It was cool. One potential problem was the oscillator under test being picked up by the wrong receiver. An external antenna with a coax feed usually has enough isolation. Now GPS and WWVB are probably easier to do if you got the bucks. Then www.buylegacy.com has had some HP GPS Receiver Discipline Clock Frequency Reference unit for $249. The Old Fart, Al, K9SI Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [[Repeater-Builder] Spectrum Communication SCR1000 VHF Manual]]
[EMAIL PROTECTED] --- In Repeater-Builder@yahoogroups.com, Joe Cody [EMAIL PROTECTED] wrote: HI Coy Please send your email addy.off list. Joe /KE4WDP [EMAIL PROTECTED] - Original Message - From: ac0y5 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Wednesday, December 03, 2003 9:05 PM Subject: Re: [[Repeater-Builder] Spectrum Communication SCR1000 VHF Manual]] Hi Joe, Yep, I know I worked on the entire GE line when the entire line came out MASTRII, EXECII, MVP and MASTR PE HT. The MASTR EXECII is similar to the MVP or vice versa. 73 Coy --- In Repeater-Builder@yahoogroups.com, Jim [EMAIL PROTECTED] wrote: Joe Cody wrote: Hi Coy. I have a master2 exec.converted to a repeater. Just FYI-Mastr II and Exec II are two different radios. Which do you have? -- Jim The higher you are, the harder it is to pump. -Cleveland Mayor Jane Cambell, after the big black-out of 2003 Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: Passive repeaters
I would say the repeater system preformance is not nearly as good at it could/should be. For the most part 9 miles should be a cake walk on a well done VHF system as long as the portables have min 4 watt output. I would first turn my attention back to the repeater and antenna system. It all depends on the building. I work at a place that is only about 3 air miles from a 100 watt two meter repeater. If it was not for the walls I could see the repeater antenna. There is nothing wrong with the repeater system. On the second floor on the side near the repeater and only about 3 walls away from the outside I can not hear or access the repeater. Tried several HTs that are known to be working fine. I can access the repeater from atleast 10 air miles away with them. The building has lots of stainless steel panels and machinery and other big ammounts of moter control circuitry. I can walk about 30 feet to an outside door and open it and access the repeater just fine on the low power setting and even 300 miliwatts one rig puts out. Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: Passive repeaters
I agree. I'm doing that distance on UHF with lots of hills and portables running only about 1 watt. I'd be willing to bet you've got a repeater antenna problem, maybe causing desense. Chuck WB2EDV - Original Message - From: skipp025 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 04, 2003 7:07 PM Subject: [Repeater-Builder] Re: Passive repeaters I would say the repeater system preformance is not nearly as good at it could/should be. For the most part 9 miles should be a cake walk on a well done VHF system as long as the portables have min 4 watt output. I would first turn my attention back to the repeater and antenna system. Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: UHF Links with Voters
If its for amateur use,full time transmit links are illegal !!! If you are using tone control,put another tone generator at the receiver site and switch it inline when COS is inactive. Have the link transmitter follow the rx input with a short delay. This fakes out the voter since it still sees idle tone and the link isnt burning 24/7/365. 73,Lee,N3APP - Original Message - From: franknmiss [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 04, 2003 5:44 PM Subject: [Repeater-Builder] Re: UHF Links with Voters Thanks Steve, Was hoping to find a UHF link system I could run continuously to eliminate the delay and noise (and not burn up!). Good info though, I didn't think the voter would work well with the initial noise on remote key up. I wanted to use the Doug Hall voter too. I also like your initials ... SSB thats great to have in the ham business! Thanks, Frank, KO5S Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] Test Sets
I am looking for the following item in working condition: For GE Master II 1- Ge Test Set model 4EX3A11 Please contact me direct with price including shipping. Thank you Jimmy Floyd NQ4U Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] info
Hello all I know this is a bit off the Topic but does anyone have a service manual on a Lowband MT1000 42-50 mhz. Looking for transmitter alignment procedure. Also does anyone have a cutting chart for a rubber duck lowband MT1000 or lease approximate at 51.xxx mhz for the portable. I've check Batlabs but didn't find much Thanks in advance Mike Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Re: UHF Links with Voters
My source? Bad memory,,,Ok,maybe it used to be but a full time link just isnt good practice. Its too easy for others to find and fiddle with,jammers and the like. Its easier on the equipment as well. Gee,wouldnt it fall under beacon rules then? Lets just say that personnaly,I would not run a continuously transmitting link. My copy of part 97 is so old,it fell apart when I pulled it out,and I KNEW you would respond... 73,Lee - Original Message - From: mch [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 04, 2003 10:26 PM Subject: Re: [Repeater-Builder] Re: UHF Links with Voters Lee, Please cite your source. Repeaters USED to be limited to 5 second tails, but that rule went away over 10 years ago. It is perfectly legal for a repeater (let alone a link) to TX 24/7/365. Joe M. Lee Williams wrote: If its for amateur use,full time transmit links are illegal !!! Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[Repeater-Builder] UHF Repeater Preamp
I'm thinking about putting a receiver preamp in our system. Any words of advice from anyone would be greatly appreciated. Brand, model, etc. If you ahve one for sale let me know too. Thanks. Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: UHF Links with Voters
Well, I do agree that it's not the best practice technically (an arguable point, I suppose), but such animals are common on the public safety bands. As for security, that too is a debatable point, as such links use a high frequency tone to indicate absence of a signal. If you could override the remote site, the worst you could do is get voted for retransmission. Most people can't simulate the control tone (users of this list excluded, of course!), as it's not standard on a user radio. As such, it is a rather highly secure link method. But, one thing you could do is to reverse the tone logic and have it send the tone when a signal is received. That would decode faster than CTCSS or CDCSS, so your remote TX would respond faster. The only drawback is that you then have to notch that tone out of the transmit audio (which could be done after voting - one notch filter). Then, just switch the link TX with CAS/COS. Oh - you would have to switch the logic in the voter, too, so it sees tone as an active site rather than inactive. My copy of part 97 is not that old - in fact, it's a URL. :-) Another point to add - just make sure any continuous link has an ID on it that runs every 10 minutes. That part is still in the rule book. :-) Joe M. Lee Williams wrote: My source? Bad memory,,,Ok,maybe it used to be but a full time link just isnt good practice. Its too easy for others to find and fiddle with,jammers and the like. Its easier on the equipment as well. Gee,wouldnt it fall under beacon rules then? Lets just say that personnaly,I would not run a continuously transmitting link. My copy of part 97 is so old,it fell apart when I pulled it out,and I KNEW you would respond... 73,Lee - Original Message - From: mch [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 04, 2003 10:26 PM Subject: Re: [Repeater-Builder] Re: UHF Links with Voters Lee, Please cite your source. Repeaters USED to be limited to 5 second tails, but that rule went away over 10 years ago. It is perfectly legal for a repeater (let alone a link) to TX 24/7/365. Joe M. Lee Williams wrote: If its for amateur use,full time transmit links are illegal !!! Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Communication Monitor
Ken, You can buy an IFR-1200S for less than $5,000 these days, and it is a very capable service monitor. The S includes the spectrum analyzer as standard, but you definitely want the tracking generator option. The high-stability time base is another desirable option. My 1200S has all the options, and I have no reason to change to a different brand or model. 73, Eric Lemmon WB6FLY ve3oks wrote: Hello, I am looking for a communication monitor, preferably IFR. Can anyone point me in the right direction. Ken ve3oks Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] UHF Repeater Preamp
At 04:01 AM 12/5/03 +, you wrote: I'm thinking about putting a receiver preamp in our system. Any words of advice from anyone would be greatly appreciated. Brand, model, etc. If you ahve one for sale let me know too. Thanks. Look at http://www.repeater-builder.com/rbtip/supplyindex.html and scroll down to repeater receiver preamplifiers. Several vendors are listed. My personal choice is Anglelinear - I've had the pleasure of chatting with Chip Angle in person several times and the guy knows his stuff - he is a weak signal enthusiast and repeater owner and has developed most of his products from requirements from his own activities or those of his customers. Various folks I know have collectively purchased over $90k worth of products from him over the last 25 years. Other customers include NASA. His web site (http://www.anglelinear.com) is worth spending a hour perusing, and the Repeater Application Notes page (buried in the Duplexers section) should be required reading for everyone. Just an opinion from a very satisfied customer. Mike WA6ILQ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] UHF Repeater Preamp
I have had great results with http://www.advancedreceiver.com/index1.html on My 444.750 Repeater had a nearby Lighting strike damage it not the receiver , Sent it in and they repaired it for about $ 15.00 and sent it back right away. 73 De Don KA9QJG Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Communication Monitor
BUT, the Tracking Gen CANNOT be added to just ANY IFR-1200Ss - only those after a certain serial number. Joe M. Eric Lemmon wrote: Ken, You can buy an IFR-1200S for less than $5,000 these days, and it is a very capable service monitor. The S includes the spectrum analyzer as standard, but you definitely want the tracking generator option. The high-stability time base is another desirable option. My 1200S has all the options, and I have no reason to change to a different brand or model. Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] UHF Repeater Preamp
Adding a preamp to some repeater systems does not always make it hear better; sometimes the receiver becomes more sensitive to overload, intermod, desense, and has a higher noise level. You can mitigate some of these problems by placing a bandpass cavity immediately in front of the preamp. Most bandpass/bandreject duplexers have surprisingly little bandpass effect, and will pass an awful lot of signal on either side of the receive frequency. A dedicated bandpass cavity will act as a preselector to greatly limit the signal seen by the preamp, and that will significantly reduce the noise floor. 73, Eric Lemmon WB6FLY uplink28 wrote: I'm thinking about putting a receiver preamp in our system. Any words of advice from anyone would be greatly appreciated. Brand, model, etc. If you ahve one for sale let me know too. Thanks. Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
