[Repeater-Builder] Re: 6 Meter Repeater
Charles, Welcome to the world of 6 Meter repeaters. They can be a lot of fun. In Missouri you are a little better off frequency and duplexer wise due to your 1.7 MHz split between transmit and receive frequencies. For radios it depends if you are a GE or Motorola person. If you are a GE person, the Mastr II is the repeater of choice, followed by a Exec II. If you are a Motorola person, the Micor or MSR2000 are the repeaters of choice, followed by the Mitrek. For a duplexer, any good commercial duplexer rated at 1 MHz spacing should do the trick. Andrew LDF Heliax for feedline, and my favorite antenna is a pair of DB Products loops, if you have enough tower space. If not a single loop will work pretty good. I tend to shy away from fiberglass (Stationmaster style) antennas for use on 6 Meter repeaters. Your worst enemy will be anything rusty or loose on the tower. If you are on a busy site near other radios and man made noise, you most likely will not need nor want to use a preamp on the receiver, but if you are out in the middle of nowhere on a solar site with a good quiet solar controller a preamp may be of benefit. Good Luck with your project. Joe - WA7JAW --- In Repeater-Builder@yahoogroups.com, Charles Rader kc5...@... wrote: I am tossing around the idea of building a 6 meter repeater. This will have to be single site if I do this. What are you guys using for the repeater, duplexer, and antenna? Thanks, Charles KC5DGC
Re: [Repeater-Builder] Wacom WP-639 Duplexer question
An additional 20dB of isolation can be realized by replacing the antenna Tee connector with a circulator. Port A to B tuned to the TX frequency, Port B to C tuned to the RX frequency. Connect TX to port A, antenna to B, Receiver to C. I'm using a set of WP-639 and with this setup I am seeing approx 102dB of rejection from the TX to RX port and 97dB the other way. On Wed, Sep 8, 2010 at 8:40 PM, Scott Zimmerman n3...@repeater-builder.com wrote: Rich, The short answer is: You need to find a bigger duplexer. Four 8 cans would work well such as a Wacom WP-641. You could simply call and order one if Wacom was still in business. (RIP) Unfortunately Tx/Rx bought them years ago for the name and to quash competition. They can be found occasionally for around $600 or so on the used market. Other alternatives are as follows: 1) You can use two antennas and split the 639 duplexer so that 2 cans are in series between the TX and the TX antenna, and the other two are in series between the RX and the RX antenna. Terry WX3M a list member is doing this with VERY good results on one of his VHF machines. Of course this involves the expense of additional feedline and a second antenna. I think you said you had this machine on an 80' mast. 50' or so of vertical isolation coupled with the additional isolation of splitting the duplexer *may* be enough isolation to get rid of all the desense. TX goes on bottom, RX on top. 2) Buy additional Band Pass / Band Reject (BPBR) cans. You can add these additional cans between the Tx and/or Rx and the duplexer. These cans will give additional isolation. Even if you can find just Pass or Notch cavities, tune them and put them in the correct place. With both of the above options, you are looking to add to the isolation between your transmitter and receiver. You'll find you'll do best by adding cans to your transmitter that notch side-band noise at your receiver's frequency. In other words, do what you can to insure your receiver is not hearing your own transmitter's sideband noise on it's input. Pass cans tuned to the TX frequency or NOTCH cavities tuned to your *RX* frequency placed in the transmit line are your best hope. Good luck, Scott Scott Zimmerman Amateur Radio Call N3XCC 474 Barnett Road Boswell, PA 15531
Re: [Repeater-Builder] Wacom WP-639 Duplexer question
Oh drat! I thought I was getting away with something :-) I am about to start on a 6m mastr ii with 1 meg split. It is a 110 watt cont duty station I am converting to a repeater. I don't think the exciter is a pll, way too many cans on the board and small icom About how much isolation will I need there? I don't know if I have a preamp for this one or not... But if I do, I would try to run it. 73 - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Wed Sep 08 23:08:38 2010 Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question The PLL exciter is why you're having such good success running a 4-cavity duplexer. If you had a PM exciter, chances are you'd be experiencing desense. The PLL exciter produces about 22 dB less noise at 600 kHz offset, reducing the noise supression requirement of the duplexer by a like amount. See: http://www.repeater-builder.com/pdf/GE_Isolation_Curves.pdf The OP also mentioned he was using a preamp - that's not helping his situation either. Even with a good receiver he's probably on the edge of crunching it with only a 4-pack. Personally, I'd never run a preamp with nothing but a 4-cavity duplexer on 2m, but if it works for you, God bless... A Q202G gives more isolation than a WP639 from what I've seen/measured, in part because the cavities are larger diameter (I think they're 7 versus 5?). --- Jeff WN3A -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of NORM KNAPP Sent: Wednesday, September 08, 2010 11:38 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] Wacom WP-639 Duplexer question I got a set of 4 sinclair cans, like a Q202g on a GE mastr II running 100 watts with pll exciter and GE preamp with no desense. Antenna is roughly 300' away fed with LDF7-50A. Is this a miracle or typical? - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Wed Sep 08 20:10:44 2010 Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question I'm not surprised- you're asking too much of a duplexer that has four 5 cans. According to my CommShop program, a duplexer with an 80 dB spec is more suitable with transmitter power in the 10-15 watt range, assuming a solid-state PA and a receiver sensitivity around 0.35 uV at 12 dB SINAD. On a 100 watt repeater, I'd expect something like a WP-642, which has six 8 cans. BTDT, got the T-shirt and mug... 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of RichardK Sent: Wednesday, September 08, 2010 3:11 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Wacom WP-639 Duplexer question Good evening, our club has a Wacom WP-639 four can duplexer as part of our repeater system. Input Fq is 147.915 and Output Fq is 147.315. We have a 600kHz (+) offset. Very simply, our main problem is when we run the transmitter at full power 100 watts, there is a HUGE desense on the receive side of things. When we drop the transmitter power level to around 20-50 watts, the receive side opens WAY up to a large area where people can get into the repeater. As we begin to bring up the transmitter power, white noise begins to appear and the receive side starts to desense again. All the cables have been switched to double sheilded cables and all the same wavelength in length. We have the duplexer seperated sheilded from the transmitter preamp parts. We have not replaced the antenna feed coax with double sheilded coax yet. Antenna is a Hustler G7 atop a 55' mast. The duplexer was retuned just over 1 year ago. Any suggestions as to what we could look into next? Some of us believe the problem is with the
RE: [Repeater-Builder] Wacom WP-639 Duplexer question
Hi Scott, can you give me some more information on circulators, or where can I get such information and prices. -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of DCFluX Sent: Thursday, September 09, 2010 2:03 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Wacom WP-639 Duplexer question An additional 20dB of isolation can be realized by replacing the antenna Tee connector with a circulator. Port A to B tuned to the TX frequency, Port B to C tuned to the RX frequency. Connect TX to port A, antenna to B, Receiver to C. I'm using a set of WP-639 and with this setup I am seeing approx 102dB of rejection from the TX to RX port and 97dB the other way. On Wed, Sep 8, 2010 at 8:40 PM, Scott Zimmerman n3...@repeater-builder.com mailto:n3xcc%40repeater-builder.com wrote: Rich, The short answer is: You need to find a bigger duplexer. Four 8 cans would work well such as a Wacom WP-641. You could simply call and order one if Wacom was still in business. (RIP) Unfortunately Tx/Rx bought them years ago for the name and to quash competition. They can be found occasionally for around $600 or so on the used market. Other alternatives are as follows: 1) You can use two antennas and split the 639 duplexer so that 2 cans are in series between the TX and the TX antenna, and the other two are in series between the RX and the RX antenna. Terry WX3M a list member is doing this with VERY good results on one of his VHF machines. Of course this involves the expense of additional feedline and a second antenna. I think you said you had this machine on an 80' mast. 50' or so of vertical isolation coupled with the additional isolation of splitting the duplexer *may* be enough isolation to get rid of all the desense. TX goes on bottom, RX on top. 2) Buy additional Band Pass / Band Reject (BPBR) cans. You can add these additional cans between the Tx and/or Rx and the duplexer. These cans will give additional isolation. Even if you can find just Pass or Notch cavities, tune them and put them in the correct place. With both of the above options, you are looking to add to the isolation between your transmitter and receiver. You'll find you'll do best by adding cans to your transmitter that notch side-band noise at your receiver's frequency. In other words, do what you can to insure your receiver is not hearing your own transmitter's sideband noise on it's input. Pass cans tuned to the TX frequency or NOTCH cavities tuned to your *RX* frequency placed in the transmit line are your best hope. Good luck, Scott Scott Zimmerman Amateur Radio Call N3XCC 474 Barnett Road Boswell, PA 15531
Re: [Repeater-Builder] Possible to purchase IRLP node numbers for AllStar nodes to thus enable IRLP connections on AllStar system?
whats bs ? if they want to use IRLP on there Allstar node then build the software to allow it to run with IRLP Just like the Echolink-IRLP guys did .. you cant run both at the same time but saves having more then 1 pc at the repeater site On Thu, Sep 9, 2010 at 12:22 AM, Kris Kirby k...@catonic.us wrote: On Wed, 8 Sep 2010, Kent Johnson wrote: Bcc to 2010 VoIP Conference List -Original Message- From: David Cameron (IRLP) [mailto:dcame...@irlp.net dcameron%40irlp.net] Sent: Wednesday, September 08, 2010 7:56 AM To: Kent Johnson Subject: Re: Possible to purchase IRLP node numbers for AllStar Kent, the short answer is no. I have had far too many complaints about people being brought into full duplex telephone calls and non-radio endpoints due to Allstar nodes on IRLP. The philosophy of IRLP is to keep radios on all ends of a link. Dave Cameron VE7LTD I call BS. -- Kris Kirby, KE4AHR Disinformation Analyst
[Repeater-Builder] FT100-D
Hello Do you know if the programming protocol of the FT100-D is available somewhere ? Gabe
Re: [Repeater-Builder] Wacom WP-639 Duplexer question
4 cans will do it. Preamp may or may not be of any use depending on noise floor. Your bigger problem is all the noise that a mobile encounters these days. Sometimes it's tough to hear the repeater through all the crap that's out there. Chuck WB2EDV - Original Message - From: NORM KNAPP nkn...@twowayradio.net To: Repeater-Builder@yahoogroups.com Sent: Thursday, September 09, 2010 3:04 AM Subject: Re: [Repeater-Builder] Wacom WP-639 Duplexer question Oh drat! I thought I was getting away with something :-) I am about to start on a 6m mastr ii with 1 meg split. It is a 110 watt cont duty station I am converting to a repeater. I don't think the exciter is a pll, way too many cans on the board and small icom About how much isolation will I need there? I don't know if I have a preamp for this one or not... But if I do, I would try to run it. 73 - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Wed Sep 08 23:08:38 2010 Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question The PLL exciter is why you're having such good success running a 4-cavity duplexer. If you had a PM exciter, chances are you'd be experiencing desense. The PLL exciter produces about 22 dB less noise at 600 kHz offset, reducing the noise supression requirement of the duplexer by a like amount. See: http://www.repeater-builder.com/pdf/GE_Isolation_Curves.pdf The OP also mentioned he was using a preamp - that's not helping his situation either. Even with a good receiver he's probably on the edge of crunching it with only a 4-pack. Personally, I'd never run a preamp with nothing but a 4-cavity duplexer on 2m, but if it works for you, God bless... A Q202G gives more isolation than a WP639 from what I've seen/measured, in part because the cavities are larger diameter (I think they're 7 versus 5?). --- Jeff WN3A -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of NORM KNAPP Sent: Wednesday, September 08, 2010 11:38 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] Wacom WP-639 Duplexer question I got a set of 4 sinclair cans, like a Q202g on a GE mastr II running 100 watts with pll exciter and GE preamp with no desense. Antenna is roughly 300' away fed with LDF7-50A. Is this a miracle or typical? - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Wed Sep 08 20:10:44 2010 Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question I'm not surprised- you're asking too much of a duplexer that has four 5 cans. According to my CommShop program, a duplexer with an 80 dB spec is more suitable with transmitter power in the 10-15 watt range, assuming a solid-state PA and a receiver sensitivity around 0.35 uV at 12 dB SINAD. On a 100 watt repeater, I'd expect something like a WP-642, which has six 8 cans. BTDT, got the T-shirt and mug... 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of RichardK Sent: Wednesday, September 08, 2010 3:11 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Wacom WP-639 Duplexer question Good evening, our club has a Wacom WP-639 four can duplexer as part of our repeater system. Input Fq is 147.915 and Output Fq is 147.315. We have a 600kHz (+) offset. Very simply, our main problem is when we run the transmitter at full power 100 watts, there is a HUGE desense on the receive side of things. When we drop the transmitter power level to around 20-50 watts, the receive side opens WAY up to a large area where people can get into the repeater. As we begin to bring up the transmitter power, white noise begins to appear and the receive side starts to desense again. All the cables have been
[Repeater-Builder] Re: Possible to purchase IRLP node numbers for AllStar nodes to thus enable IRLP connections on AllStar system?
if they want to use IRLP on there Allstar node then build the software to allow it to run with IRLP Just like the Echolink-IRLP guys did .. you cant run both at the same time but saves having more then 1 pc at the repeater site Which is exactly what they did. Bottom line is if you want an IRLP node number you have to BUY an IRLP board. Don't take the bait the discussion isn't really here, Ken copied that email to a bunch of mailing lists for some reason. I have no idea where the original discussion is, this is the third list I've seen it on this A.M. 73's Skip WB6YMH
RE: [Repeater-Builder] Wacom WP-639 Duplexer question
WACOM hasn't been in business for some years now. Good luck contacting them directly! -Original Message- From: Richard Kelly Sent: Sep 8, 2010 9:18 PM To: repeater-builder@yahoogroups.com Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question Good evening Eric, Maybe this is why when the trasmit power is dropped to the 20-50 watt range, the receive opens way up like it should. However, according to the spec sheets regarding the Wacom SP-639 Duplexer, it is rated for 200 watts. So, again, not sure what's going on. We will be trying other things such as adding a second ground rod outside the shack instead of the single one we use now. We will also try isolating the amp some more and replacing the coax feed line with hard line. Thank you very much. We will be contacting Wacom directly tomorrow. Rich Kelly, W2RRK
RE: [Repeater-Builder] Wacom WP-639 Duplexer question
WACOM was bought out my Telewave and there tech support staff is very helpful… http://telewave.com/ You can cross reference your older Wacom cavities with their new product line at these links: http://www.telewave.com/pricelist/wacom.html http://www.telewave.com/pricelist/duplexers.html From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of larryjspamme...@teleport.com Sent: Thursday, September 09, 2010 11:04 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question WACOM hasn't been in business for some years now. Good luck contacting them directly! -Original Message- From: Richard Kelly Sent: Sep 8, 2010 9:18 PM To: repeater-builder@yahoogroups.com mailto:repeater-builder%40yahoogroups.com Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question Good evening Eric, Maybe this is why when the trasmit power is dropped to the 20-50 watt range, the receive opens way up like it should. However, according to the spec sheets regarding the Wacom SP-639 Duplexer, it is rated for 200 watts. So, again, not sure what's going on. We will be trying other things such as adding a second ground rod outside the shack instead of the single one we use now. We will also try isolating the amp some more and replacing the coax feed line with hard line. Thank you very much. We will be contacting Wacom directly tomorrow. Rich Kelly, W2RRK
[Repeater-Builder] Re: 6 Meter Repeater
Re: 6 Meter Repeater Charles Rader kc5...@... wrote: I am tossing around the idea of building a 6 meter repeater. This will have to be single site if I do this. What are you guys using for the repeater, duplexer, and antenna? In addition to the other radio brands and models listed by others, the Midland Syntech Low-Band Mobiles are relatively cheap and easy to use as both mobiles and repeaters. The Syntech 1 (and 2) mobiles will connect back-to-back for a nice repeater and you can cross band two radios for a split site. There's a Yahoo Group for Midland Radios and the repeater conversion information for the Syntech 1 radios is available for download from the files section (of that Group) Syntech 1 radios reprogram with an Eprom module, which must be erased and reprogrammed with the proper equipment. I've been offering free Syntech 1 Eprom Module Programming for years, you need only pay the US Mail Postage. Have a look at this Ebay Auction: Ebay Item Number: 260661249410 Midland 70-052C Syntech 42-50Mhz 80-Ch on 6m Amateur This radio is probably ready to go for regular use or adding the COR circuit to make it also work as a repeater receiver. Prices for used Midland Radios are all over the place... watch Ebay and your local Amateur Radio Swaps/Flea Markets. I've seen used Midland Syntech 1 Radios sell for anything from $5 each up to $99 (as seen in the mentioned Ebay Auction Listing). What's a working ready to go (or a relatively easy conversion project) 6M Radio worth to you? Antennas for 6 meters are relatively easy to deal with, I've even converted CB Radio Ground Plane Antennas over, but both home-brew and surplus commercial are out there if you dig around. You'll find a number of duplexer projects on the web. Keep in mind you can start out with vertical split antenna scheme and low power to get rolling. You'd be surprised how far 2 to 5 watts can go... I ran a split antenna low power 6M Repeater using two modified antennas and 45ft separation (600KHz offset). It was a lot of great hands on learning... and in theory no one gets hurt in the process. cheers, s.
RE: [Repeater-Builder] Wacom WP-639 Duplexer question
From the Repeater-Builder website: WACOM and Remec WACOM started out as Waco Communications in Waco, Texas. At some point WACOM was bought by Remec, and in November of 2001 was sold to TX-RX. TX-RX has since been purchased by Bird Technologies Group. I've tried several times to contact them about some replacement cables, etc. for some used TX/RX VHF Repeater Duplexers, and have received no response except for one reply that said something like I've passed your request for information to our engineering group, who will be contacting you with the information you need. I never heard nything further, after several months. But several weeks ago, we were able to order a brand-new TX/RX 420-MHz 4-cavity duplexer from Bird Technologies for a 420-MHz link transceiver, although it hasn't arrived yet (it's a Special Order item). Larry -Original Message- From: Steven M Hodell Sent: Sep 9, 2010 11:10 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question WACOM was bought out my Telewave and there tech support staff is very helpful… http://telewave.com/ You can cross reference your older Wacom cavities with their new product line at these links: http://www.telewave.com/pricelist/wacom.html http://www.telewave.com/pricelist/duplexers.html From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of larryjspamme...@teleport.com Sent: Thursday, September 09, 2010 11:04 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question WACOM hasn't been in business for some years now. Good luck contacting them directly! -Original Message- From: Richard Kelly Sent: Sep 8, 2010 9:18 PM To: repeater-builder@yahoogroups.com Subject: RE: [Repeater-Builder] Wacom WP-639 Duplexer question Good evening Eric, Maybe this is why when the trasmit power is dropped to the 20-50 watt range, the receive opens way up like it should. However, according to the spec sheets regarding the Wacom SP-639 Duplexer, it is rated for 200 watts. So, again, not sure what's going on. We will be trying other things such as adding a second ground rod outside the shack instead of the single one we use now. We will also try isolating the amp some more and replacing the coax feed line with hard line. Thank you very much. We will be contacting Wacom directly tomorrow. Rich Kelly, W2RRK
Re: [Repeater-Builder] Re: Possible to purchase IRLP node numbers for AllStar nodes to thus enable IRLP connections on AllStar system?
I have been an IRLP owner for I would say 10 years now .. when the node #'s were 3 numbers not 4 .. its a great service just like Echo-Link and now D-Star and others .. now to get D-Star and IRLP to play :) that would be fun ! On Thu, Sep 9, 2010 at 10:04 AM, Skip freebsd...@hotmail.com wrote: if they want to use IRLP on there Allstar node then build the software to allow it to run with IRLP Just like the Echolink-IRLP guys did .. you cant run both at the same time but saves having more then 1 pc at the repeater site Which is exactly what they did. Bottom line is if you want an IRLP node number you have to BUY an IRLP board. Don't take the bait the discussion isn't really here, Ken copied that email to a bunch of mailing lists for some reason. I have no idea where the original discussion is, this is the third list I've seen it on this A.M. 73's Skip WB6YMH
RE: [Repeater-Builder] Re: 6 Meter Repeater
Not there yet. I don't even have a 6 meter rig. I am looking at getting the Yaesu FT-8900R for my first 6 meter. Any ways, I have built Master II Repeater, Micor Repeaters, and Lots of Mitrek Repeaters. So I am more familiar with Motorola than GE but I can handle both. Never built anything below 2 meter though. If I went with the Mitrek I would use two radios. Due to the isolation, use one for transmit and one for receive. My site would be a 60 foot tower on my dad's place in south central Missouri. He has one of the tallest spots in our county so it is a great location. So the tower is empty now and I can add sections to make it taller if I need to. From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of burkleoj Sent: Thursday, September 09, 2010 1:02 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: 6 Meter Repeater Charles, Welcome to the world of 6 Meter repeaters. They can be a lot of fun. In Missouri you are a little better off frequency and duplexer wise due to your 1.7 MHz split between transmit and receive frequencies. For radios it depends if you are a GE or Motorola person. If you are a GE person, the Mastr II is the repeater of choice, followed by a Exec II. If you are a Motorola person, the Micor or MSR2000 are the repeaters of choice, followed by the Mitrek. For a duplexer, any good commercial duplexer rated at 1 MHz spacing should do the trick. Andrew LDF Heliax for feedline, and my favorite antenna is a pair of DB Products loops, if you have enough tower space. If not a single loop will work pretty good. I tend to shy away from fiberglass (Stationmaster style) antennas for use on 6 Meter repeaters. Your worst enemy will be anything rusty or loose on the tower. If you are on a busy site near other radios and man made noise, you most likely will not need nor want to use a preamp on the receiver, but if you are out in the middle of nowhere on a solar site with a good quiet solar controller a preamp may be of benefit. Good Luck with your project. Joe - WA7JAW --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com , Charles Rader kc5...@... wrote: I am tossing around the idea of building a 6 meter repeater. This will have to be single site if I do this. What are you guys using for the repeater, duplexer, and antenna? Thanks, Charles KC5DGC image001.jpgimage002.jpg
