Re: [Repeater-Builder] Remote Base Project
At 09:00 PM 5/23/04 -0700, you wrote: Hey Mike, Isn't a Lambda ... just a small Sheepda ... Yes, a lamb is a baby. If I remember correctly (it's been 20 years since I last sheared a sheep) the parents are rams and ewes So (with tongue firmly in cheek) an adult Lambda would be a Ramda or a Eweda. And no, you don't measure Ramdas in megabytes or by pin count. Neil Mike WA6ILQ Mike WA6ILQ wrote: The older non-unified Micor RX chassis show up on ebay now and then. I used one - made for a low band RX - with a UHF RX board. Had to drill out the rivets that held the channel element bracket, but other than that it was a drop-in. Power was supplied by a small 12v 2a Lambda supply. It was used with an Aerotron RX that would not live in a high RF site. The combo was dubbed a Micortron. Later on the Aerotron RX was moved to a 420mhz link channel and reinstalled. Mike WA6ILQ At 11:26 AM 5/22/04 -0400, you wrote: Almost forgot. If things don't work out, you may be able to accomplish what you want by changing to a Micor or Master II receiver. Recency was never known for its ability to be very selective and the receivers were always prone to overload problems. But it's still worth a try. Chuck WB2EDV - Original Message - From: Chuck Kelsey [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 22, 2004 11:18 AM Subject: Re: [Repeater-Builder] Remote Base Project I agree with Kevin. Try it. Keep your remote base TX output as low as you can. Try always to work with repeaters and users with big signals. It amazing what a big signal can do to override desense. Consider installing a flat, horizontal screen between the two antennas to try to get additional isolation. Use heliax for all cable runs and double shielded to all the radio equipment. You may be surprised what you can accomplish. Chuck WB2EDV - Original Message - From: Kevin Custer [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 22, 2004 9:06 AM Subject: Re: [Repeater-Builder] Remote Base Project Mathew Quaife wrote: So then no real good way of doing it, is what i am gathering? Don't let other discourage you so much. Just because their experience hasn't been a good one doesn't mean you should give up. Try moving the antenna around (up/down - back/forth) while doing a link, you may see quite a difference in a few feet or even inches. Same principal as inching the car ahead at a stoplight to get your favorite FM radio station in better. Use simple antennas for the remote base like a small beam or a ground plane, and don't be afraid to experiment. Kevin Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
Mike, thank you for the confirmation. Neil Mike WA6ILQ wrote: At 09:00 PM 5/23/04 -0700, you wrote: Hey Mike, Isn't a Lambda ... just a small Sheepda ... Yes, a lamb is a baby. If I remember correctly (it's been 20 years since I last sheared a sheep) the parents are rams and ewes So (with tongue firmly in cheek) an adult Lambda would be a Ramda or a Eweda. And no, you don't measure Ramdas in megabytes or by pin count. Neil Mike WA6ILQ Mike WA6ILQ wrote: The older non-unified Micor RX chassis show up on ebay now and then. I used one - made for a low band RX - with a UHF RX board. Had to drill out the rivets that held the channel element bracket, but other than that it was a drop-in. Power was supplied by a small 12v 2a Lambda supply. It was used with an Aerotron RX that would not live in a high RF site. The combo was dubbed a Micortron. Later on the Aerotron RX was moved to a 420mhz link channel and reinstalled. Mike WA6ILQ At 11:26 AM 5/22/04 -0400, you wrote: Almost forgot. If things don't work out, you may be able to accomplish what you want by changing to a Micor or Master II receiver. Recency was never known for its ability to be very selective and the receivers were always prone to overload problems. But it's still worth a try. Chuck WB2EDV - Original Message - From: Chuck Kelsey [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 22, 2004 11:18 AM Subject: Re: [Repeater-Builder] Remote Base Project I agree with Kevin. Try it. Keep your remote base TX output as low as you can. Try always to work with repeaters and users with big signals. It amazing what a big signal can do to override desense. Consider installing a flat, horizontal screen between the two antennas to try to get additional isolation. Use heliax for all cable runs and double shielded to all the radio equipment. You may be surprised what you can accomplish. Chuck WB2EDV - Original Message - From: Kevin Custer [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 22, 2004 9:06 AM Subject: Re: [Repeater-Builder] Remote Base Project Mathew Quaife wrote: So then no real good way of doing it, is what i am gathering? Don't let other discourage you so much. Just because their experience hasn't been a good one doesn't mean you should give up. Try moving the antenna around (up/down - back/forth) while doing a link, you may see quite a difference in a few feet or even inches. Same principal as inching the car ahead at a stoplight to get your favorite FM radio station in better. Use simple antennas for the remote base like a small beam or a ground plane, and don't be afraid to experiment. Kevin Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
Kevin is quite correct ... so you will do well to follow his suggestions. Is part of the been-there ... done that. Neil McKie - WA6KLA Kevin Custer wrote: Mathew Quaife wrote: So then no real good way of doing it, is what i am gathering? Don't let other discourage you so much. Just because their experience hasn't been a good one doesn't mean you should give up. Try moving the antenna around (up/down - back/forth) while doing a link, you may see quite a difference in a few feet or even inches. Same principal as inching the car ahead at a stoplight to get your favorite FM radio station in better. Use simple antennas for the remote base like a small beam or a ground plane, and don't be afraid to experiment. Kevin Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
We have an MSR-2000 on 146.745- with 2 2M remote bases and it seems to work fine. 1 remote is a 50 watt Maxtrac on 146.970- (146.370 tx). The antenna is about 250 feet directly below the repeater antenna. The second remote is a 75W Mitrek on 145.450-. The antenna for that is only about 50 feet below the repeater antenna. We get more desense from the paging transmitters on the same tower than we do from our own remotes. 73, Chris, KG0BP - Original Message - From: Chuck Kelsey [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 22, 2004 10:26 AM Subject: Re: [Repeater-Builder] Remote Base Project Almost forgot. If things don't work out, you may be able to accomplish what you want by changing to a Micor or Master II receiver. Recency was never known for its ability to be very selective and the receivers were always prone to overload problems. But it's still worth a try. Chuck WB2EDV - Original Message - From: Chuck Kelsey [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 22, 2004 11:18 AM Subject: Re: [Repeater-Builder] Remote Base Project I agree with Kevin. Try it. Keep your remote base TX output as low as you can. Try always to work with repeaters and users with big signals. It amazing what a big signal can do to override desense. Consider installing a flat, horizontal screen between the two antennas to try to get additional isolation. Use heliax for all cable runs and double shielded to all the radio equipment. You may be surprised what you can accomplish. Chuck WB2EDV - Original Message - From: Kevin Custer [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 22, 2004 9:06 AM Subject: Re: [Repeater-Builder] Remote Base Project Mathew Quaife wrote: So then no real good way of doing it, is what i am gathering? Don't let other discourage you so much. Just because their experience hasn't been a good one doesn't mean you should give up. Try moving the antenna around (up/down - back/forth) while doing a link, you may see quite a difference in a few feet or even inches. Same principal as inching the car ahead at a stoplight to get your favorite FM radio station in better. Use simple antennas for the remote base like a small beam or a ground plane, and don't be afraid to experiment. Kevin Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
I've often wondered if this is a case where one of those notch-only mobile duplexors might come in handy. Consider this... Connect one side of a notch-only duplexor to the remote base, with the antenna port connected to the remote base antenna. Tune both of the notch cavities on that side to the repeater's RX freq. Would you even need anything connected to the other side? Perhaps a 50 ohm resister? This should notch down spectral noise at the repeater's RX freq to a point where antenna separation wouldn't have to be that great. I've been considering this on my UHF machine where I'd like to add a UHF remote. I thought of it because I happen to have a bunch of Cellwave 633s around and they seem to go real cheep on ebay. Perhaps something similar could be done on 2m. 73, Chris, KG0BP - Original Message - From: Kevin Custer [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 22, 2004 7:55 AM Subject: Re: [Repeater-Builder] Remote Base Project w9mwq wrote: Question is, I a am putting a remote base on my RLC2 controller with the RBI-1 interface. All is working ok. What I need some ideas on is how to keep the transmitter from killing the receiver of the repeater? What can be done to isolate the two radios. The radio is a Kenwood TM-731 and is running only 5 watts. What are some thoughts. Thanks. As others mentioned, vertical antenna separation is most of the key. I have successfully installed in-band remote bases at most of my 2 meter repeater sites, and where you cannot get a bunch of antenna separation, filtering is a necessity. Most of the time, a notch filter placed in the remote base line tuned to the receiver frequency can really help. It does the same thing as your duplexer, notches transmitter side band noise on the repeater receivers frequency. Kevin Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
Kevin is right, I am going to just expierment, others has done it. But as I was thinking about it, actually the repeaters that I am going to be using is mainly in one direction, a good high gain beam in that general direction horizontily polorized might help on the intermod. Others has done it, I am sure there is a way. I have filters I can use, but wanna try not to. See what happens. Mathew Kevin is quite correct ... so you will do well to follow his suggestions. Is part of the been-there ... done that. Neil McKie - WA6KLA Kevin Custer wrote: Mathew Quaife wrote: So then no real good way of doing it, is what i am gathering? Don't let other discourage you so much. Just because their experience hasn't been a good one doesn't mean you should give up. Try moving the antenna around (up/down - back/forth) while doing a link, you may see quite a difference in a few feet or even inches. Same principal as inching the car ahead at a stoplight to get your favorite FM radio station in better. Use simple antennas for the remote base like a small beam or a ground plane, and don't be afraid to experiment. Kevin Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
Ken is right, this problem is existing even into a dummy load, I have not begun to expierment with the antenna issue yet. The lowest power setting on the Kenwood is 5 watts, so that is what I have to work with. Mathew - Original Message - At 01:09 PM 5/22/2004 -0400, you wrote: Why? I've done it for about 15 years. I can't use it within about 60 kHz of the local repeater, but otherwise it's fine. I just used a cavity to notch out the repeater TX. The loss of sensitivity near the repeater TX frequency is overcome by the strength of the repeaters at the site. --I think you guys are missing the point. His problem is the remote base xmtr is taking out the repeater receiver, not the other way around. While you're correct about probably being able to tighten up things, if he's going to run any power on the remote TX and it is frequency agile, he has some issues. Note he did not say he is running an inband LINK - he said an RBI-1 with a Kenwood mobile REMOTE BASE. Hence the strong inferrence to wanting to be able to move the Kenwood radio around, frequency wise. Did I miss something? Ken -- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Remote Base Project
Question is, I a am putting a remote base on my RLC2 controller with the RBI-1 interface. All is working ok. What I need some ideas on is how to keep the transmitter from killing the receiver of the repeater? What can be done to isolate the two radios. The radio is a Kenwood TM-731 and is running only 5 watts. What are some thoughts. Thanks. Mathew Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
More details needed.What is the repeater? WHat frequencies are you trying to use? If running the same band on a remote,you will need lots of antenna separation. We use 140' of vertical separation. You also will not be able to work frequencies close to your own without filters of some type.Some close frequencies will be impossible to use. It all depends on the frequency separation vs. antenna/filter isolation. - Original Message - From: w9mwq [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, May 21, 2004 9:11 PM Subject: [Repeater-Builder] Remote Base Project Question is, I a am putting a remote base on my RLC2 controller with the RBI-1 interface. All is working ok. What I need some ideas on is how to keep the transmitter from killing the receiver of the repeater? What can be done to isolate the two radios. The radio is a Kenwood TM-731 and is running only 5 watts. What are some thoughts. Thanks. Mathew Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
Well the repeater is one that I built from a couple of regency repeaters, which is going to be changed here in the near future. The duplexer is a TX RX setup. Won't be able to get that much seperation, at most about 40 feet is what I will be able to get, maybe 50. I can understand the seperation. Would there be any advantage to putting the radio in an RF box for shielding? Mathew - Original Message - From: Q [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, May 21, 2004 8:46 PM Subject: Re: [Repeater-Builder] Remote Base Project More details needed.What is the repeater? WHat frequencies are you trying to use? If running the same band on a remote,you will need lots of antenna separation. We use 140' of vertical separation. You also will not be able to work frequencies close to your own without filters of some type.Some close frequencies will be impossible to use. It all depends on the frequency separation vs. antenna/filter isolation. - Original Message - From: w9mwq [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, May 21, 2004 9:11 PM Subject: [Repeater-Builder] Remote Base Project Question is, I a am putting a remote base on my RLC2 controller with the RBI-1 interface. All is working ok. What I need some ideas on is how to keep the transmitter from killing the receiver of the repeater? What can be done to isolate the two radios. The radio is a Kenwood TM-731 and is running only 5 watts. What are some thoughts. Thanks. Mathew Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
At 09:15 PM 5/21/2004 -0500, you wrote: Would there be any advantage to putting the radio in an RF box for shielding? ---The short answer? Only if you put the antenna(s) in a shielded box too. You're asking too much of physics by trying to run a remote base on the same band as your repeater :-) Ken -- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
Trade the antenna for a shielded dummy load, or possibly 1000 feet of rg400 to attenuate the signal down. Ken Arck wrote: At 09:15 PM 5/21/2004 -0500, you wrote: Would there be any advantage to putting the radio in an RF box for shielding? ---The short answer? Only if you put the antenna(s) in a shielded box too. You're asking too much of physics by trying to run a remote base on the same band as your repeater :-) Ken -- 73...Clark Beckman N8PZD Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
So then no real good way of doing it, is what i am gathering? Would there be any advantage to putting the radio in an RF box for shielding? ---The short answer? Only if you put the antenna(s) in a shielded box too. You're asking too much of physics by trying to run a remote base on the same band as your repeater :-) Ken -- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
I guess it depends on the amount of filtering you can have for each of the frequencies you want to use, and the cable switching needed to use the cavities for that freq. Imagine a coax switch with a port for every frequency you want to activate, now duplicate that so that you can transmit and recieve, you will need a dummy load for each unused transmit port to keep the impedance correct there on the recieve side you will just need the filter with a deep enough notch to get the remote base freq in and keep the rest out. The 731 has 10 memories if my memory is still holding up, so when you are finished you will have a controller with 10 outputs, 20 sets of cavities, 9 dummy loads, 2 10 port switches, 2 more antennas and feedline runs and then you can begin to tune out whatever else you find once you connect the antennas to the outside world. There is a way to do it but it depends on your desire to aquire the components needed to allow it to co-exist, and the patience to get it all working together. In the commercial market it would probably cost about 35-40k to make this work, but with tower tenants on long enough leases to amortize the capital investment it will even pay for itself if nobody gets cold feet. As for a ham radio project, it may not be practical as every time you want a different freq. you will have to go try tuning the associated cavity set/s and that will grow old after a few cold or hot trips to the tower site. It is not a push button adventure if thats what you were thinking, there is a ever present noise floor to contend with not including the noise you have already on-site. Mathew Quaife wrote: So then no real good way of doing it, is what i am gathering? Would there be any advantage to putting the radio in an RF box for shielding? ---The short answer? Only if you put the antenna(s) in a shielded box too. You're asking too much of physics by trying to run a remote base on the same band as your repeater :-) -- 73...Clark Beckman N8PZD Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
w9mwq wrote: Question is, I a am putting a remote base on my RLC2 controller with the RBI-1 interface. All is working ok. What I need some ideas on is how to keep the transmitter from killing the receiver of the repeater? What can be done to isolate the two radios. The radio is a Kenwood TM-731 and is running only 5 watts. What are some thoughts. Thanks. As others mentioned, vertical antenna separation is most of the key. I have successfully installed in-band remote bases at most of my 2 meter repeater sites, and where you cannot get a bunch of antenna separation, filtering is a necessity. Most of the time, a notch filter placed in the remote base line tuned to the receiver frequency can really help. It does the same thing as your duplexer, notches transmitter side band noise on the repeater receivers frequency. Kevin Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
Ken Arck wrote: At 09:15 PM 5/21/2004 -0500, you wrote: Would there be any advantage to putting the radio in an RF box for shielding? ---The short answer? Only if you put the antenna(s) in a shielded box too. You're asking too much of physics by trying to run a remote base on the same band as your repeater :-) I disagree. One of my lower powered 2 meter repeaters will successfully remote base at the next channel, 15 kc away. I use about 100 feet of vertical separation, hand tuned to find the null, and a nice clean link radio. The link radio is a ICOM 2-AT and I run it at 200 mW most of the time. One thing to remember is you usually don't need much power when linking from a repeater site, so, use as little as necessary. Kevin Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Remote Base Project
Mathew Quaife wrote: So then no real good way of doing it, is what i am gathering? Don't let other discourage you so much. Just because their experience hasn't been a good one doesn't mean you should give up. Try moving the antenna around (up/down - back/forth) while doing a link, you may see quite a difference in a few feet or even inches. Same principal as inching the car ahead at a stoplight to get your favorite FM radio station in better. Use simple antennas for the remote base like a small beam or a ground plane, and don't be afraid to experiment. Kevin Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
Almost forgot. If things don't work out, you may be able to accomplish what you want by changing to a Micor or Master II receiver. Recency was never known for its ability to be very selective and the receivers were always prone to overload problems. But it's still worth a try. Chuck WB2EDV - Original Message - From: Chuck Kelsey [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 22, 2004 11:18 AM Subject: Re: [Repeater-Builder] Remote Base Project I agree with Kevin. Try it. Keep your remote base TX output as low as you can. Try always to work with repeaters and users with big signals. It amazing what a big signal can do to override desense. Consider installing a flat, horizontal screen between the two antennas to try to get additional isolation. Use heliax for all cable runs and double shielded to all the radio equipment. You may be surprised what you can accomplish. Chuck WB2EDV - Original Message - From: Kevin Custer [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 22, 2004 9:06 AM Subject: Re: [Repeater-Builder] Remote Base Project Mathew Quaife wrote: So then no real good way of doing it, is what i am gathering? Don't let other discourage you so much. Just because their experience hasn't been a good one doesn't mean you should give up. Try moving the antenna around (up/down - back/forth) while doing a link, you may see quite a difference in a few feet or even inches. Same principal as inching the car ahead at a stoplight to get your favorite FM radio station in better. Use simple antennas for the remote base like a small beam or a ground plane, and don't be afraid to experiment. Kevin Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
Make that MASTR! not Master. I DO know how to spell it ;-) Chuck WB2EDV - Original Message - From: Chuck Kelsey [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 22, 2004 11:26 AM Subject: Re: [Repeater-Builder] Remote Base Project Almost forgot. If things don't work out, you may be able to accomplish what you want by changing to a Micor or Master II receiver. Recency was never known for its ability to be very selective and the receivers were always prone to overload problems. But it's still worth a try. Chuck WB2EDV Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
Ken Arck wrote: ---I don't disagree with what you're saying here, Kevin. But based on the radios he stated he was using (a Regency repeater and a Kenwood mobile), he's fighting more issues than you do in your above scenario. Spectral noise from the remote is greater in his setup and I have little doubt the Regency receiver (I am quite familiar with them) has as tight a front end as a receiver you'd use :-) There's many a Db handicap right there! The receiver in the above scenario was a Hamtronics. Kevin Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
Why? I've done it for about 15 years. I can't use it within about 60 kHz of the local repeater, but otherwise it's fine. I just used a cavity to notch out the repeater TX. The loss of sensitivity near the repeater TX frequency is overcome by the strength of the repeaters at the site. Joe M. Ken Arck wrote: You're asking too much of physics by trying to run a remote base on the same band as your repeater :-) Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
At 01:09 PM 5/22/2004 -0400, you wrote: Why? I've done it for about 15 years. I can't use it within about 60 kHz of the local repeater, but otherwise it's fine. I just used a cavity to notch out the repeater TX. The loss of sensitivity near the repeater TX frequency is overcome by the strength of the repeaters at the site. --I think you guys are missing the point. His problem is the remote base xmtr is taking out the repeater receiver, not the other way around. While you're correct about probably being able to tighten up things, if he's going to run any power on the remote TX and it is frequency agile, he has some issues. Note he did not say he is running an inband LINK - he said an RBI-1 with a Kenwood mobile REMOTE BASE. Hence the strong inferrence to wanting to be able to move the Kenwood radio around, frequency wise. Did I miss something? Ken -- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
Hi Kevin I run a star uhf linked system all on uhf between 430-440 here in South Africa , both the repeaters 439/431 and link 434/433 .I have had success with this but there are many factors influencing the end result . Regards Brad ZS5WT --- Kevin Custer [EMAIL PROTECTED] wrote: Ken Arck wrote: At 09:15 PM 5/21/2004 -0500, you wrote: Would there be any advantage to putting the radio in an RF box for shielding? ---The short answer? Only if you put the antenna(s) in a shielded box too. You're asking too much of physics by trying to run a remote base on the same band as your repeater :-) I disagree. One of my lower powered 2 meter repeaters will successfully remote base at the next channel, 15 kc away. I use about 100 feet of vertical separation, hand tuned to find the null, and a nice clean link radio. The link radio is a ICOM 2-AT and I run it at 200 mW most of the time. One thing to remember is you usually don't need much power when linking from a repeater site, so, use as little as necessary. Kevin __ Do you Yahoo!? Yahoo! Domains Claim yours for only $14.70/year http://smallbusiness.promotions.yahoo.com/offer Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Remote Base Project
Ken Arck wrote: At 01:09 PM 5/22/2004 -0400, you wrote: Why? I've done it for about 15 years. I can't use it within about 60 kHz of the local repeater, but otherwise it's fine. I just used a cavity to notch out the repeater TX. The loss of sensitivity near the repeater TX frequency is overcome by the strength of the repeaters at the site. --I think you guys are missing the point. His problem is the remote base xmtr is taking out the repeater receiver, not the other way around. The (notch) cavity goes in the remote base line, to reduce the remote base transmitter side band noise out of the repeater receiver. Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
