Re: [Repeater-Builder] Linking two shared repeaters
Thanks Jim .The main idea is that our business clients can have some extra range and also retain privacy so other users that share it carn't hear the other businesses on the channel.We only currently have 3 businesses that share the 1st site each with their own ctcss tones.With your second paragraph we found that having a separate link radio at each end could possibly cause continous linking of the sites and lock the repeaters together in transmission .With our open uhf network we have 5 separate repeaters each on different frequencies and all are linked back to our central site using only 1 link radio per remote site so everything that goes over any one of the sites can be heard by all users over the other 5 sites so our farmers can move freely from one area to another and still maintain communications with their other mobiles.Currently I think we cover close to 2000kms in total area We found setting these sites up that we can install one link radio at the remote sites with the transmitt frequency the same as the central site receive and the link receiver the same frequency as the central site transmitt frequency.Then the link radio acts as a mobile radio with a beam which is aimed towards the central site. With the tone panel on site 2 it will decode the ctcss when a user uses it and then repeat users tone over the site 2 TX frequency and also site1 rx input frequency .The only thing I have to make sure of is when someone uses site 1the site 2 receiver is disconnected and the ctcss/audio in site 2 is received on the link receiver only and then is fed into the tone panel to decode the users tone and then transferred to site 2 transmitter only and not to the link transmitter otherwise the link radio will switch to TX and block the incoming signal from site 1 With our other open network it is really simple when someone users the central site the link receiver on the outer sites transfers the audio direct to the remotes sites transmitter and then switches back to the remote sites receiver. The only difference between the open and our private/shared system is that the private system users a tone control panel to control the repeaters and since the tone control panels only work with valid ctcss tones the whole system should maintain privacy over each site and between the sites (over the link) Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 www.kerinvalecomaudio.com.au ---Original Message--- From: Jim Brown Date: 3/01/2008 4:02:13 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Linking two shared repeaters Ian, our ham club has talked about putting one of their repeaters on a different frequency and linking them together. We operate both on the same frequency now, one at a time with separate tones. My proposal to them was to put a receiver at each site for the other repeater and in-band link them. I think that is what you are proposing to do also, except you would use a separate transmitter to do the in-band link. Using a separate transmitter in your case may be more easily accomplished since you can use the same receiver CTCSS tone and transmit audio to both your repeater transmitter and link transmitter. Using a separate receiver as I proposed to our club would be easy for our single CTCSS system with each receiver feeding the controller input through a circuit which gives priority to the local repeater receiver. In your case, you could put your link transmitter on a separate beam pointed at the other site and let the normal tone controller take care of the other repeater. The only thing I would suggest is that you configure your controllers to only transmit the CTCSS while a user is key down, and not during any ID or squelch tail. With a decent link, you would have full interoperability with both systems, and no key up delays due to the other station being on the other repeater. I have not run across a two repeater system linked in this manner, but it does seem to be the easiest way to get the same audio on both repeaters. In your case, that may be a slight detrement since users on the second repeater would be prevented from using the repeater when the first repeater was busy. Using the receiver link I proposed would allow a station to use the second repeater by overriding the audio from the first repeater by simply keying the second repeater input. 73 - Jim W5ZIT --- Kerincom [EMAIL PROTECTED] wrote: Hi guys .I have one shared uhf commercial repeater using a tp-163 panel and I am going to install another repeater on different frequencies 50kms away and are looking at installing a tp-163 ctcss panel to it but also looking for a easy way to link the two repeaters together allowing clients on one site to be able to use the same tone on both repeaters just by changing channel and still maintain the privacy on both sites . One option I came up with was on the 2nd site when someone uses it the panel detects their tone
[Repeater-Builder] Codeplug for GP360 VHF
hi i just recieved a gp360 vhf but it gives a codeplug error on startup i have the program to program (profesional GM300 GP300 R03.01.00_EN) it but not the correct Codeplug can anybody help me with this ?? GP360 band : VHF Type : PW302F model : MD25KDF9AN5AE Version : R03.01.37 help is much apriciated best 73's Joost,PE1RMN
Re: [Repeater-Builder] Linking two shared repeaters
Ian, I think you missed my comment on the way the extra receiver implementation would work. I proposed using a circuit that gives priority to the regular repeater receiver for that system. This would lock out the auxillary receiver during input on one repeater, and by transmitting CTCSS only while a user is active, there would never be a case where both auxillary receivers would be enabled, so that locking the two together continuously would not happen. I even have a custom circuit that I have posted to the group that provides that priority to one receiver. I still think it is a viable solution to linking two repeaters together, but I have not implemented it so can't be for certain sure. I'll be interested in your solution if and when you get it implemented. 73 - Jim W5ZIT --- Kerincom [EMAIL PROTECTED] wrote: Thanks Jim .The main idea is that our business clients can have some extra range and also retain privacy so other users that share it carn't hear the other businesses on the channel.We only currently have 3 businesses that share the 1st site each with their own ctcss tones.With your second paragraph we found that having a separate link radio at each end could possibly cause continous linking of the sites and lock the repeaters together in transmission Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
[Repeater-Builder] Re: Linking two shared repeaters
Here's one of many possible options for a two-site system. Each repeater site has one added half-duplex radio. Here's the basic list: Repeater Transmitter Receiver TP-163 Tone Panel Regular two-way radio used as the link. A few small electronic parts to make an interface (small dpdt-relays) You might want to draw the basic diagram out. Start with the main repeater receiver discriminator audio through the contacts of an added mini dpdt relay (keyed on via the repeater receiver cor logic) to the TP-163 input. Same thing with the link radio discriminator audio... gated through a small relay operated by the link radio cor logic to the same tp-163 disc input location as the receiver. Discriminator audio arrives at the tp-163 input through the closed relay contacts only when the COR (squelch logic) of a receiver becomes active. A cheap and easy way to isolate and route an active receiver discriminator output to the tp-163 input. Transmit audio and ctcss from the tp-163 is routed to both the repeater and link radio inputs. If required... simple op-amp and/or resistor networks can be used to help buffer various ctcss/audio paths. Transmit PTT from the tp-163 output is routed direct to the repeater transmitter and the remaining relay contacts on the repeater receiver cor logic. The other side or output of the relay contacts are routed to the link radio ptt input. The link radio ptt becomes active only when the repeater receiver cor relay contacts are closed AND tp-163 outputs a valid ptt logic. In operation a valid COR and decoded ctcss tone from the repeater receiver through the tone panel and latched COR Relay contacts provides ptt logic, audio ctcss to both transmitters. Inbound link signals with valid ctcss and cor are routed to the tp-163 and provide repeater transmitter ptt, voice audio and ctcss signaling. The repeater transmitter becomes active with any valid tp-163 transmit logic. The link radio ptt logic requires valid transmit logic from the tp-163 and the repeater receiver COR Relay being closed... so an inbound signal will not self-key the link radio tx. In the case of the link radio... it's smart money to program it on two different frequencies for the link. As an example the UHF transmit frequency of link Radio-A might be 462.5125 and the receiver set to 467.5125 The link Radio-Bat the remote site is programmed to the reverse freuencies of link Radio-A. There are number of paths possible to expand the above system. cheers, s. Kerincom [EMAIL PROTECTED] wrote: Hi guys .I have one shared uhf commercial repeater using a tp-163 panel and I am going to install another repeater on different frequencies 50kms away and are looking at installing a tp-163 ctcss panel to it but also looking for a easy way to link the two repeaters together allowing clients on one site to be able to use the same tone on both repeaters just by changing channel and still maintain the privacy on both sites . One option I came up with was on the 2nd site when someone uses it the panel detects their tone and feeds site 2 audio/ctcss to the site2 transmitter and also a link radio to send it at the same time to site 1.When someone uses site1 ,a ctcss/audio signal is received by the link receiver which disconnects the link transmitter and also site2 receiver and the link rx ctcss/audio is then fed into the tone panel to decode and then is fed to site 2 transmitter . Link radio transmitter feeds site 1 rx frequency input Link radio receiver receives site 1 TX frequency output. Does anyone have any further suggestions or know of web pages detailing linking two or more shared repeaters Thank You, Ian Wells, Kerinvale Comaudio, 361 Camboon Road.Biloela.4715 www.kerinvalecomaudio.com.au
[Repeater-Builder] RF Radiation Hazard Warning Signs?
At what power output level would either a VHF or UHF amateur radio repeater need to be operating before its owner should consider mounting a RF Warning sign on the equipment room door (assuming there's no other tx equipment in the room)? 240 watts on the FM broadcast band got this licensee a Notice of Apparent Liability from the FCC. What if my ham repeater is running 1/4 KW? http://www.fcc.gov/eb/FieldNotices/2003/DOC-279189A1.html
RE: [Repeater-Builder] RF Radiation Hazard Warning Signs?
It looks like this station has a LOT more to worry about than merely not having an RFR exposure sign posted... After reading the Notice of Apparent Liability and Forfeiture, it appears that nobody at the station had ANY knowledge of how the station was operating, and that there were a number of problems in addition to the RFR signage issue. Add to that, that this station was fined for these SAME violations in 2002. Its knuckleheads like this that make things difficult for the everyone when they don't comply with the law. But it looks like the FCC was looking to take enforcement action, given the past history of the station management. You do have a valid question, though. And I'm curious whether at a given site, I individually, or all of the operators collectively, are liable for placement of such signage... In either event, I'm assuming that once the signage is posted - conspicuously - the requirement is satisfied. Maybe I'll play it safe and buy a sign or two for the building where my 900 machine is operating, and post it/them myself. But now the question that begs asking is: WHERE does this signage go? On the door which accesses the roof; or at the bottom of the roof stairway that goes to the roof level above the elevator penthouse (where the radio equipment room is); or on the door to the radio equipment room, or. Unfortunately, as an amateur I don't own the high-cost surveying equipment necessary for making accurate measurements of all the RF on the roof (Police Dept, Fire Dept, other ham equipment, cellular, etc)... I only know the level at which my equipment operates. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Tony L. Sent: Thursday, January 03, 2008 2:20 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] RF Radiation Hazard Warning Signs? At what power output level would either a VHF or UHF amateur radio repeater need to be operating before its owner should consider mounting a RF Warning sign on the equipment room door (assuming there's no other tx equipment in the room)? 240 watts on the FM broadcast band got this licensee a Notice of Apparent Liability from the FCC. What if my ham repeater is running 1/4 KW? http://www.fcc.gov/eb/FieldNotices/2003/DOC-279189A1.html
RE: [Repeater-Builder] WYGG (RF Radiation Hazard Warning Signs?)
I did some checking on station WYGG. 1) They are licensed for 100W; they were operating at 240W. 2) They are licensed for an antenna height of 15 meters (~46 feet). They were operating at almost *3 times* that height (29.9 meters in excess). 3) They had no logs available; 4) There was no designated chief engineer; 5) The station manager didn't have a clue. I think they're lucky to have been able to keep their license - then again, maybe the FCC allowed them to keep it because they know that this is a known-good revenue stream... Mark - N9WYS
RE: [Repeater-Builder] RF Radiation Hazard Warning Signs?
The RF exposure rules also take into account the distance from the antenna (pardon me, radiating element) to the personnel. In this case, it was on a fairly short pole on top of the roof, with very little restriction to human access. The ARRL has a form you can fill out which asks about frequency, power, antenna gain, and elevation, and it comes up with a protection radius around the radiator. As I recall, even at 10 meters, where the RF energy was most potent, it was only a few feet at 100 watts. Any antenna that's up a tower by 20 feet or more is probably way out of range to everyone except people climbing the tower, such as tower workers, and by their nature, they should know all about any possible RF radiation. They're not part of the general population and fall under different rules. Bob M. == --- n9wys [EMAIL PROTECTED] wrote: It looks like this station has a LOT more to worry about than merely not having an RFR exposure sign posted... After reading the Notice of Apparent Liability and Forfeiture, it appears that nobody at the station had ANY knowledge of how the station was operating, and that there were a number of problems in addition to the RFR signage issue. Add to that, that this station was fined for these SAME violations in 2002. Its knuckleheads like this that make things difficult for the everyone when they don't comply with the law. But it looks like the FCC was looking to take enforcement action, given the past history of the station management. You do have a valid question, though. And I'm curious whether at a given site, I individually, or all of the operators collectively, are liable for placement of such signage... In either event, I'm assuming that once the signage is posted - conspicuously - the requirement is satisfied. Maybe I'll play it safe and buy a sign or two for the building where my 900 machine is operating, and post it/them myself. But now the question that begs asking is: WHERE does this signage go? On the door which accesses the roof; or at the bottom of the roof stairway that goes to the roof level above the elevator penthouse (where the radio equipment room is); or on the door to the radio equipment room, or. Unfortunately, as an amateur I don't own the high-cost surveying equipment necessary for making accurate measurements of all the RF on the roof (Police Dept, Fire Dept, other ham equipment, cellular, etc)... I only know the level at which my equipment operates. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Tony L. Sent: Thursday, January 03, 2008 2:20 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] RF Radiation Hazard Warning Signs? At what power output level would either a VHF or UHF amateur radio repeater need to be operating before its owner should consider mounting a RF Warning sign on the equipment room door (assuming there's no other tx equipment in the room)? 240 watts on the FM broadcast band got this licensee a Notice of Apparent Liability from the FCC. What if my ham repeater is running 1/4 KW? http://www.fcc.gov/eb/FieldNotices/2003/DOC-279189A1.html Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
[Repeater-Builder] Measuring Coverage Area
What's the most accurate down-and-dirty method of measuring the footprint of a repeater's receiver coverage? I know. the whole question sounds like an oxymoron, but inquiring minds want to know. de WM4B Mike Kathleen, GA
Re: [Repeater-Builder] Linking two shared repeaters
Ian, here is my thinking. When site 1 has a signal on the repeater input, the signal from site 2 is blocked because of the circuit that gives precedence to the local site repeater receiver. When a site 1 user unkeys, there will be no CTCSS tone coming back from site 2 to key the site 1 repeater. The combination of the precedence circuit and CTCSS requirement for both repeaters keeps the system from locking up. The same circuit would be required between the receivers at site 2 as in site 1. And both repeaters would have to be configured to only transmit a CTCSS tone when a user keys the input, not during the squelch tail. 73 - Jim W5ZIT --- Kerincom [EMAIL PROTECTED] wrote: I will have a look at the circuit and see .The problem we found with link setup 1 upper design is we could not have one link radio on one site and one on another site as when the site 2 link stops transmitting and rx site 1 tail retrips site 2 and keeps them on .Another problem was while s1 link in transmitting s2 receiver is trying to pick up the incoming signal and s1 link transmission at the same time . Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
Re: [Repeater-Builder] RF Radiation Hazard Warning Signs?
Tony L. wrote: At what power output level would either a VHF or UHF amateur radio repeater need to be operating before its owner should consider mounting a RF Warning sign on the equipment room door (assuming there's no other tx equipment in the room)? 240 watts on the FM broadcast band got this licensee a Notice of Apparent Liability from the FCC. What if my ham repeater is running 1/4 KW? http://www.fcc.gov/eb/FieldNotices/2003/DOC-279189A1.html While others have pointed out that the FCC was going after these twits because they didn't even have the proper power output level set for their license... The question for Amateurs is a good one though -- lots of people run lots of power and don't ever do even a cursory bit of math on their particular station (let alone their repeaters) to see if they're in any danger. These links may or may not be useful -- the information on them is dated 1997 and 1998 and they haven't apparently been updated since then. (Odd. It says the ARRL put in requests to make changes and expected to hear back in 1998. Ha!) http://n5xu.ece.utexas.edu/rfsafety/exemptions.shtml http://www.arrl.org/news/rfsafety/ The Handbook does have this all in a convenient to read format that covers the theory and new standards back in 1996/97(?), and it's also published online as a web page: http://www.arrl.org/news/rfsafety/hbkrf.html Nate WY0X
Re: [Repeater-Builder] Measuring Coverage Area
If by down-and-dirty you mean simple, you can do a HAAT (Height Above Average Terrain) calculation. This is about as easy as it gets ( http://www.fcc.gov/mb/audio/bickel/haat_calculator.html). This method is easy, but only accurate if the terrain is mostly flat. It doesn't do well in mountainous areas or with directional antennas because it assumes an omni directional pattern. The next step up is probably a program called Radio Mobile ( http://www.cplus.org/rmw/english1.html) that allows you to enter receiver location, antenna gain and pattern, and then uses downloadable terrain data to plot a coverage map. It's not really friendly to use, but with the help of some online tutorials, and some time playing with the program, you should be able to get a reasonably accurate plot. -- Keith McQueen [EMAIL PROTECTED] 801-224-9460 On Jan 3, 2008 3:16 PM, Mike Besemer (WM4B) [EMAIL PROTECTED] wrote: What's the most accurate down-and-dirty method of measuring the footprint of a repeater's receiver coverage? I know… the whole question sounds like an oxymoron, but inquiring minds want to know. de WM4B Mike Kathleen, GA
[Repeater-Builder] Re: Repeater/controller interconnect cable
This is the basis for our interconnects in the new design for the Toronto Repeater Controller. It has been working just fine for a while in test but not on site (software not yet written :-( ). We do not change the ends, however, rather we have built adapters for the radio end to go to the radio itself and mounted VGA connects on the controller board. It has been operating as a repeater in fail-safe (no micro running) mode for several months as va3mcu and no problems encountered. 73 Nigel ve3id --- In Repeater-Builder@yahoogroups.com, n1ist [EMAIL PROTECTED] wrote: I'm getting ready to wire up a new repeater. In the past, I have used separate wires to make up the interconnect cable between the repeater and controller (RG316 for tx and rx audio, 2 pair for PTT/COS/CTCSS). Even in expando sleeving, it's not the best. Has anyone used PC VGA monitor cable (just the cable, with new ends) for this? The one I just looked at has 4 wires plus 3 coaxes, all in a shield. /mike
Re: [Repeater-Builder] Measuring Coverage Area
Mike Besemer (WM4B) wrote: What’s the most accurate down-and-dirty method of measuring the footprint of a repeater’s receiver coverage? I know… the whole question sounds like an oxymoron, but inquiring minds want to know. de WM4B Mike Down-and-dirty: Drive around and see where it covers. Write on napkin from fast-food joint. (GRIN) Really-Fancy Down-and-Dirty: Find some software to plot received signal strength from a connected radio at regular intervals that also logs GPS data. Coverage for a repeater is reall a function of two things, the transmitter coverage and receiver usable sensitivity. You can build a system that transmits well but can't hear anything (alligator), and vice-versa (elephant). With that said, assuming your system is relatively balanced and youre engineering is right for both... Transmitter coverage is the above drive around method (well, if you can't key the repeater from where you can hear it, you might find out you're not as balanced as you thought you were). Receiver usable sensitivity (not just raw sensitivity, but sensitivity while hooked to the antenna system including noise and any interference present) is measured at the site. There's a nice article on the RB website about how to do that measurement, I believe. You can only extrapolate from there, because you don't know what the mobile rig's RF output, feedline, antenna, and height will be... so you just take something average and do the math from there to see where the repeater will hear. (The most often used method here is just to go for the maximum usable receiver sensitivity that you can possibly squeeze out of your system and not worry about where it will theoretically hear. Push the number as low as you can without getting into the noise floor of the site or the noise figure of the radio -- since you're probably adding a pre-amp to get there on most receivers, even modern ones.) A another more engineering method would be to get a theoretical coverage pattern would be to use RF coverage prediction software and with good measurements of power output and the manufacturer's specifications for the antenna gain, you could build maps like this one: http://www.colcon.org/fig/thorodin_coverage.gif But you still have to go compare the map to the real world with real radios at some point. How much of that you do, all depends on how precise you want to be about it and how much time you can dedicate to the process. (GRIN) Free software is available for predication that does a decent job for the prediction part of it, and commercial software ($$$) will be marginally better at the analysis, and perhaps easier to use. (I don't know -- I don't use commercial software. http://www.cplus.org/rmw/english1.html - RadioMobile Software The free stuff is good enough almost all of the time for your personal use. If doing reports for others, the liability issues might drive you into the arms of a commercial piece of software. Many 2-way shops will do this type of thing for a fee, also -- if you're not the do-it-yourself type and don't have any friends in the biz. Of course all of the above also has other real-world realities that affect it... multi-path, interference sources off-site that don't bother the repeater but bother the end-users, adjacent channel interference/problems, etc etc etc. Just shoot for the best receiver sensitivity you can muster, engineer that in from the very start, and do it right (proper bandpass or other filtering, and pre-amp with the right amount of gain for the Noise Figure of your chosen repeater's receiver) and the transmitter at something reasonable... 50W out the duplexer (after duplexer loss, isolator, etc.) to the antenna is very similar to what the mobiles are going to push back toward the repeater... HT's 5W... So you can see it's really easy to build an alligator. There are solid engineering reasons to build an alligator at times (remote receiver sites, need for building penetration for listening to the machine on HT's while someone will talk back on a fixed mobile in the building, etc.)... but mostly a balanced to slightly alligator system works best for the users. They can listen to the repeater to get a feel for how well they'll be into it... a major alligator never gives that kind of user feedback loop to the end-user... they hear it well everywhere and can't figure out why they can't get into it reliably. Nate WY0X Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is
RE: [Repeater-Builder] RF Radiation Hazard Warning Signs?
The question for Amateurs is a good one though -- lots of people run lots of power and don't ever do even a cursory bit of math on their particular station (let alone their repeaters) to see if they're in any danger. OET 65 is the RFR bible as far as the FCC is concerned. Supplement B is specific to amateur radio. http://www.fcc.gov/oet/info/documents/bulletins/ At a transmitter site, even one with controlled access, simply posting a warning sign is almost never good enough to absolve the licensee(s) of responsibility. Signs are often a part of an RFR safety program, but alone they don't mitigate the danger. If you have reason to believe there are exposure levels above the prescribed limits, there needs to be procedures and policies in place to properly protect workers. As a sidebar, we had a situation here locally where microwave dishes and 900 MHz panel antennas were aimed out glass windows from an upper floor of a high-rise building. The antennas were mounted flush to the inside of the glass. Behind the antennas (i.e. inside the building) RFR levels were acceptable. However, outside the building, in front of the antennas, window washers were being over-exposed, and the FCC took issue with it. --- Jeff WN3A
[Repeater-Builder] Kenwood TKR-750 rptr.
Can the tpye 1 TKR-750 Rptr. (146-174) be programmed and work on 144.570 Rx and 145.170 Tx (or even down to 143 to work on the MARS freq's.) if they are found to be NTIA compliant. Or should I really be looking for the the Type 2 rptr. (136-150)for this purpose. Also can anyone name a source or 2 for Kenwood rptrs that would give a discount price to Ham Clubs,ARES, etc. Thanks Doug N3DAB
RE: [Repeater-Builder] WYGG (RF Radiation Hazard Warning Signs?)
The FCC data base lists their ERP as 1.5KW and antenna height as 26 meters AMSL. http://www.fcc.gov/fcc-bin/fmq?list=0facid=19867 n9wys [EMAIL PROTECTED] wrote: I did some checking on station WYGG. 1) They are licensed for 100W; they were operating at 240W. 2) They are licensed for an antenna height of 15 meters (~46 feet). They were operating at almost *3 times* that height (29.9 meters in excess). 3) They had no logs available; 4) There was no designated chief engineer; 5) The station manager didn't have a clue. I think they're lucky to have been able to keep their license - then again, maybe the FCC allowed them to keep it because they know that this is a known-good revenue stream... Mark - N9WYS - Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
Re: [Repeater-Builder] Kenwood TKR-750 rptr.
give me a call we are a Kenwood dealer thanks John 1-888-708-0709 - Original Message - From: n3dab To: Repeater-Builder@yahoogroups.com Sent: Thursday, January 03, 2008 6:06 PM Subject: [Repeater-Builder] Kenwood TKR-750 rptr. Can the tpye 1 TKR-750 Rptr. (146-174) be programmed and work on 144.570 Rx and 145.170 Tx (or even down to 143 to work on the MARS freq's.) if they are found to be NTIA compliant. Or should I really be looking for the the Type 2 rptr. (136-150)for this purpose. Also can anyone name a source or 2 for Kenwood rptrs that would give a discount price to Ham Clubs,ARES, etc. Thanks Doug N3DAB
[Repeater-Builder] Re: Kenwood TKR-750 rptr.
Hi Doug, Yes, and the repeater will need to be re-aligned for the new frequency. Easy enough to complete if you have the proper test equipment. Email me direct and I'll provide you with the service manual (free) and the information on how to connect an external repeater controller. There are a large number of Kenwood Dealers here on the group. Email any one of us for price quotes and service information...including me. cheers, skipp skipp025 at yahoo.com www.radiowrench.com n3dab [EMAIL PROTECTED] wrote: Can the tpye 1 TKR-750 Rptr. (146-174) be programmed and work on 144.570 Rx and 145.170 Tx (or even down to 143 to work on the MARS freq's.) if they are found to be NTIA compliant. Or should I really be looking for the the Type 2 rptr. (136-150)for this purpose. Also can anyone name a source or 2 for Kenwood rptrs that would give a discount price to Ham Clubs,ARES, etc. Thanks Doug N3DAB
[Repeater-Builder] 800 MHZ Syntor Base For Sale
I have a friend of mine who has a Motorola 800 MHZ Syntor Base Station for sale. He tells me that it was working when it was removed from service. He is looking for any reasonable offer, plus shipping. If you have any questions, contact me off list and I will get an answer for you. Eric, VA3EAM
RE: [Repeater-Builder] Kenwood TKR-750 rptr.
Doug, Although the K2 repeater is the obvious choice for covering the entire 2m band, the K1 version will probably tune down okay. Unless you have the TKR-750 Service Manual in hand, you may not realize that there are front-end coils that must be tuned to optimize the repeater performance. Once tuned per the manual, the TKR-750 will meet its specifications. There are several Kenwood dealers on the Repeater-Builder list who will gladly work out a deal for you. However, if you plan to purchase a new TKR-750 repeater, do not let yourself be talked into anything but the low-split repeater! 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of n3dab Sent: Thursday, January 03, 2008 3:06 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Kenwood TKR-750 rptr. Can the type 1 TKR-750 Rptr. (146-174) be programmed and work on 144.570 Rx and 145.170 Tx (or even down to 143 to work on the MARS freq's.) if they are found to be NTIA compliant. Or should I really be looking for the the Type 2 rptr. (136-150)for this purpose. Also can anyone name a source or 2 for Kenwood rptrs that would give a discount price to Ham Clubs,ARES, etc. Thanks Doug N3DAB
RE: [Repeater-Builder] Kenwood TKR-750 rptr.
Our club now owns six of the low split 750's and they work great. Wouldn't have anything else for the price. Joe --- Eric Lemmon [EMAIL PROTECTED] wrote: Doug, Although the K2 repeater is the obvious choice for covering the entire 2m band, the K1 version will probably tune down okay. Unless you have the TKR-750 Service Manual in hand, you may not realize that there are front-end coils that must be tuned to optimize the repeater performance. Once tuned per the manual, the TKR-750 will meet its specifications. There are several Kenwood dealers on the Repeater-Builder list who will gladly work out a deal for you. However, if you plan to purchase a new TKR-750 repeater, do not let yourself be talked into anything but the low-split repeater! 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of n3dab Sent: Thursday, January 03, 2008 3:06 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Kenwood TKR-750 rptr. Can the type 1 TKR-750 Rptr. (146-174) be programmed and work on 144.570 Rx and 145.170 Tx (or even down to 143 to work on the MARS freq's.) if they are found to be NTIA compliant. Or should I really be looking for the the Type 2 rptr. (136-150)for this purpose. Also can anyone name a source or 2 for Kenwood rptrs that would give a discount price to Ham Clubs,ARES, etc. Thanks Doug N3DAB Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping
RE: [Repeater-Builder] Kenwood TKR-750 rptr.
Eric , I'm using this post to respond to you, Skipp and John. Thank you all for the responses and I'll certainly keeping you all in mind when I make a final decision on a purchase.I would opt for the K2 for initial purchase but they seem to be harder to find on the used market then the K1's. The fact that the K1 can be retuned to the lower end of the 140 band with out any component changes is good to know. I'm saving all your post for future reference. Thanks again and Happy New Year to you all. -- Doug N3DAB/WPRX486/WPJL709 Eric Lemmon [EMAIL PROTECTED] wrote: = Doug, Although the K2 repeater is the obvious choice for covering the entire 2m band, the K1 version will probably tune down okay. Unless you have the TKR-750 Service Manual in hand, you may not realize that there are front-end coils that must be tuned to optimize the repeater performance. Once tuned per the manual, the TKR-750 will meet its specifications. There are several Kenwood dealers on the Repeater-Builder list who will gladly work out a deal for you. However, if you plan to purchase a new TKR-750 repeater, do not let yourself be talked into anything but the low-split repeater! 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of n3dab Sent: Thursday, January 03, 2008 3:06 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Kenwood TKR-750 rptr. Can the type 1 TKR-750 Rptr. (146-174) be programmed and work on 144.570 Rx and 145.170 Tx (or even down to 143 to work on the MARS freq's.) if they are found to be NTIA compliant. Or should I really be looking for the the Type 2 rptr. (136-150)for this purpose. Also can anyone name a source or 2 for Kenwood rptrs that would give a discount price to Ham Clubs,ARES, etc. Thanks Doug N3DAB
RE: [Repeater-Builder] Measuring Coverage Area
Mike, You already know the answer- it's by *measuring* the signal strength. Even high-end propagation programs like ComStudy, which I use, can only estimate what the signal strength should be, based upon known topography. The fly in the ointment is the fact that the real world does not agree with the digital elevation models or the land coverage models. My expensive software, and the free Radio Mobile software, share the same deficiency: The real world does not agree with the model! Trees grow, and buildings are erected, and both will attenuate the signal and affect the coverage. To be blunt, only a fool will embrace the coverage plots without verification. I use a really nifty tool made by Berkeley Varitronics, known as the Coyote. It is basically a recording signal strength meter. The Coyote unit contains both a GPS receiver to continuously determine and record the position, date, and time, and a calibrated receiver to provide a continuous record of the signal strength received. I simply drive the perimeter of the promised coverage area, and the proof is in the signal plots. Even in the best-planned systems, there will be dead spots. Even if such dead spots cannot be eliminated, it is valuable information to know where they are. There are some well-known radio manufacturers who have made fantastic promises about coverage when bidding on a contract, who later had to upgrade their systems at a huge cost, because someone actually used a mobile signal strength meter to check on the claims. That company wound up making only a paltry profit after they were forced to meet their claims. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Mike Besemer (WM4B) Sent: Thursday, January 03, 2008 2:17 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Measuring Coverage Area What's the most accurate down-and-dirty method of measuring the footprint of a repeater's receiver coverage? I know. the whole question sounds like an oxymoron, but inquiring minds want to know. de WM4B Mike Kathleen, GA
RE: [Repeater-Builder] WYGG (RF Radiation Hazard Warning Signs?)
Paul, Are we sure we are both reading this right? I see ERP listed at “0.1 kW”, but there are three entries for this station. The reason I quoted 100W is because that was what was cited in the NAL… Mark – N9WYS _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Paul Guello Sent: Thursday, January 03, 2008 5:18 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] WYGG (RF Radiation Hazard Warning Signs?) The FCC data base lists their ERP as 1.5KW and antenna height as 26 meters AMSL. http://www.fcc.gov/fcc-bin/fmq?list=0facid=19867 No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1207 - Release Date: 1/2/2008 11:29 AM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1207 - Release Date: 1/2/2008 11:29 AM
[Repeater-Builder] This is carrying home brewing to the extreme....
Thanks to Rod Wallberg KB8DNS for this pointer Trust me guys, you really want to watch this video all the way through... http://paillard.claude.free.fr/ The Babelfish translation service is here: http://babelfish.altavista.com/babelfish/tr Plug in his URL, select French to English and hit Translate. And in true McGuyver style, he starts out with a Swiss army knife. Mike WA6ILQ
