Re: [Repeater-Builder] 6 mtr Duplexer
Hi many thanks, I have looked at this site and as you say very interesting. I will see if I can find any Heliax and maybe have a try. 73 Steve M1SWB - Original Message - From: Tony lelieveld [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, July 23, 2005 4:00 AM Subject: [Repeater-Builder] 6 mtr Duplexer Steve Here is a link to a very interesting Heliax build 6 meter duplexer. There is a lot of information and good reading on the subject. http://www.dallas.net/%7Ejvpoll/dup6m/dup6m.html 73, Tony VE3DWI Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.9.3/56 - Release Date: 22/07/05 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] Fw: receiver
that is the thought. thanks and other thoughts? - Original Message - From: Tony lelieveld To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 10:44 PM Subject: RE: [Repeater-Builder] Fw: receiver John, If I think that what you think is what I think you are thinking, do you mean to say. Will there be a noticeable difference in range between a receiver having a sensitivity of 0.30 as opposed to 0.35 uVolt? No you would not be able to tell the difference. 73, Tony VE3DWI From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Maire-RadiosSent: July 22, 2005 17:27To: Repeater-Builder@yahoogroups.comSubject: [Repeater-Builder] Fw: receiver Subject: receiver on 2 meter band if the receiver is .30 or .35 do you think we could tell on the operation range on the receive? thanks john YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. 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] Fw: receiver
The difference is less than 1.5 dB... barely noticeable, if at all... and definitely isn't going to buy you any added range. Paul, N1BUG On Saturday 23 July 2005 09:33 am, Maire-Radios wrote: that is the thought. thanks and other thoughts? Will there be a noticeable difference in range between a receiver having a sensitivity of 0.30 as opposed to 0.35 uVolt? 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] VHF Maxtrac Power Output
Hi All! I'm wiring up a temporary repeater using 2 16 pin VHF Maxtracs and a 7k. All is fine, my question is there a "safe" power level when used in repeater use with Fans? I know that micors, (my bread and butter)don't like less than 50-60% power. Is this the same with Maxtracs? It's a 40 watt VHF. Thought I'd ask before I blow anything up! Thanks, 73 Brian WD9HSY YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] Re: VHF Maxtrac Power Output
With my experience using the various Maxtrac radios [VHF/UHF and 900 mhz] in repeater and remotebase service, I would suggest you cut the power back on that 40 watt rig to abt 25-30 watts. These radios ARE NOT designed for continuous keyed down transmit mode [repeater service] at their maximum power output, so be aware of this. Doug W7FDF --- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote: Hi All!.I'm wiring up a temporary repeater using 2 16 pin VHF Maxtracs and a 7k.All is fine, my question is there a safe power level when used in repeater use with Fans?..73 Brian WD9HSY 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] VHF Maxtrac Power Output
it will run 24/7 at 25-30 watts with a fan. lance - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, July 23, 2005 1:22 PM Subject: [Repeater-Builder] VHF Maxtrac Power Output Hi All! I'm wiring up a temporary repeater using 2 16 pin VHF Maxtracs and a 7k. All is fine, my question is there a "safe" power level when used in repeater use with Fans? I know that micors, (my bread and butter)don't like less than 50-60% power. Is this the same with Maxtracs? It's a 40 watt VHF. Thought I'd ask before I blow anything up! Thanks, 73 Brian WD9HSY YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] Re: VHF Maxtrac Power Output
On a related question...what is the concensus regarding the minimum output for VHF and UHF maxtracs before ghosts start appearing? Thanks Bob, GMRS WPVV845, Amateur KG4WAD, LMRS WPXC892 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] Still after
First get a stove pipe crimping tool, and a stack of big coffee cans.cut the rim off one end and use the crimpier to prep the edge cut the bottom out of the next can and rim as above. stick the crimped edge into the bottom of the next can, check for fit. do this till you have a stack taller than 54". Make four of them. wire wheel the joint to prep it for soldering. Assemble the stack of cans, use three pop rivets around each seam to hold it till soldered. Then get your propane torch and plumbing solder, sweat the joints. Oh yes, in the third can from the bottom, mount a disk of plexi-glass with a 9/16th hole in the middle. This will steady the tuning rod later. To make the top of the can use 3/8ths or 1/4 inch aluminum plate. Fit it flush with the top of the can. drill and tap or use self taping 8-32 screws to hold the top around the top. Now that you have this complete let's get some plumbing done. Get 2 each 8ft sections of 1/2 and 3/4 copper pipe. 4 1/2 copper pipe caps 4 4ft sections of 5/16ths all thread rod with a bag of nuts to fit., 4 3/4 pipe to 3/4 treaded copper fitting. four 3/4 threaded pipe caps. By now you should be getting a picture of this. cut the pipe in half so you have 4ft sections. take one end of the 3/4 pipe and cut small long triangles around the end. you with squeeze this to make it like fingers down to the 1/2 size pipe to slide through. take a 1/2 pipe cap and drill it to let the all thread through. take two nuts and secure the all thread to the cap. solder this to the end of the 1/2 pipe. now solder the threaded fitting to the top of the 3/4 pipe that you made the fingers on the opposite end. Feed the 1/2 pipe with all thread into the top of the 3/4 pipe. gently push it through the fingers you made. Test this for good even firm contact. I used so no ox here just before I did the finial tune. Take your top plate and drill a hole to accept the threaded top of the pipe. Drill and tap the 3/4 pipe cape in the center top to take the all thread. put this on and secure to the top using spacers as needed to secure the top to the pipe securely. Get some nice knobs at a swap meet and you now have a basic cavity. There are many ways to make the pickups. I made my cans pass/notch and used a so239 panel mount tuning caps out of the finals of a RCA car phone. and the loops were made from left over 1/2 pipe. I flattened it and sanded the sides to separate it into two flat peaces. We made the loops 2 3/4 inches long or 5 and 3/4 memory fades. try it and see what works it is cheep to try. We had to tack some silver mica caps across the tuning cap to get the notch where we needed it. I have a set of these on the 52.6 -500 repeater in Bakersfield California. it is a 100 watt micor base running at 75 watts with a pre-amp. It has been in service for about 16 years. This is not meant to be complete instructions to build a duplexer. It is just meant to get you a usable platform to experiment with. with good construction skills and test equipment it is very easy to make 6 meter duplexers. You can take this basic setup and replace components and materials based on your skills and availability. Lowband is a fun world to play in. Don't let folks tell you you can't do it or it wont work. IT will, it does and you can. Kevin King SCSA BSCIS ARS KC6OVD GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of SteveSent: Friday, July 22, 2005 6:33 AMTo: Repeater-Builder@yahoogroups.comSubject: Re: [Repeater-Builder] Still after Hi Kevin please tell me more. Diagrams etc 73 Steve - Original Message - From: Kevin King To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 2:45 AM Subject: RE: [Repeater-Builder] Still after Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Kevin King SCSA BSCIS ARS KC6OV GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of SteveSent: Thursday, July 21, 2005 9:40 AMTo: Repeater-Builder@yahoogroups.comSubject: [Repeater-Builder] Still after Hi Iam still after a 6mtr heliax duplexer. Iam in Liverpool UK So if any can or knows somebody who could make one, please email me direct. I have been told that the heliax ones can be troublesome but I cant afford 1200 UKP for a commercialy made one. 73 Steve M1SWB No virus found in this incoming message.Checked by AVG Anti-Virus.Version: 7.0.323 / Virus Database: 267.9.2/55 - Release Date: 21/07/05 YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on
[Repeater-Builder] Re: Question Motorola Quantar VHF ?
A good to hear that GOOD RADIO for all replying Thanks !! ANTHONY .73S W4NCR WILMINGTON NC 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] Still after
hmm good point! I guess one shows his age by coffee being in a can! Ok so go to a restaurant and see if they have the big cans that tomato sauce or vegetables may come in. Is that still packed in a can? Kevin King SCSA BSCIS ARS KC6OVD GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Kris Kirby Sent: Friday, July 22, 2005 11:04 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Still after On Thu, 21 Jul 2005, Kevin King wrote: Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Can you still buy coffee in cans? How do you weld those suckers together? -- Kris Kirby [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security 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] Still after
Many thanks sounds fun :-) Steve - Original Message - From: Kevin King To: Repeater-Builder@yahoogroups.com Sent: Saturday, July 23, 2005 8:51 PM Subject: RE: [Repeater-Builder] Still after First get a stove pipe crimping tool, and a stack of big coffee cans.cut the rim off one end and use the crimpier to prep the edge cut the bottom out of the next can and rim as above. stick the crimped edge into the bottom of the next can, check for fit. do this till you have a stack taller than 54". Make four of them. wire wheel the joint to prep it for soldering. Assemble the stack of cans, use three pop rivets around each seam to hold it till soldered. Then get your propane torch and plumbing solder, sweat the joints. Oh yes, in the third can from the bottom, mount a disk of plexi-glass with a 9/16th hole in the middle. This will steady the tuning rod later. To make the top of the can use 3/8ths or 1/4 inch aluminum plate. Fit it flush with the top of the can. drill and tap or use self taping 8-32 screws to hold the top around the top. Now that you have this complete let's get some plumbing done. Get 2 each 8ft sections of 1/2 and 3/4 copper pipe. 4 1/2 copper pipe caps 4 4ft sections of 5/16ths all thread rod with a bag of nuts to fit., 4 3/4 pipe to 3/4 treaded copper fitting. four 3/4 threaded pipe caps. By now you should be getting a picture of this. cut the pipe in half so you have 4ft sections. take one end of the 3/4 pipe and cut small long triangles around the end. you with squeeze this to make it like fingers down to the 1/2 size pipe to slide through. take a 1/2 pipe cap and drill it to let the all thread through. take two nuts and secure the all thread to the cap. solder this to the end of the 1/2 pipe. now solder the threaded fitting to the top of the 3/4 pipe that you made the fingers on the opposite end. Feed the 1/2 pipe with all thread into the top of the 3/4 pipe. gently push it through the fingers you made. Test this for good even firm contact. I used so no ox here just before I did the finial tune. Take your top plate and drill a hole to accept the threaded top of the pipe. Drill and tap the 3/4 pipe cape in the center top to take the all thread. put this on and secure to the top using spacers as needed to secure the top to the pipe securely. Get some nice knobs at a swap meet and you now have a basic cavity. There are many ways to make the pickups. I made my cans pass/notch and used a so239 panel mount tuning caps out of the finals of a RCA car phone. and the loops were made from left over 1/2 pipe. I flattened it and sanded the sides to separate it into two flat peaces. We made the loops 2 3/4 inches long or 5 and 3/4 memory fades. try it and see what works it is cheep to try. We had to tack some silver mica caps across the tuning cap to get the notch where we needed it. I have a set of these on the 52.6 -500 repeater in Bakersfield California. it is a 100 watt micor base running at 75 watts with a pre-amp. It has been in service for about 16 years. This is not meant to be complete instructions to build a duplexer. It is just meant to get you a usable platform to experiment with. with good construction skills and test equipment it is very easy to make 6 meter duplexers. You can take this basic setup and replace components and materials based on your skills and availability. Lowband is a fun world to play in. Don't let folks tell you you can't do it or it wont work. IT will, it does and you can. Kevin King SCSA BSCIS ARS KC6OVD GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of SteveSent: Friday, July 22, 2005 6:33 AMTo: Repeater-Builder@yahoogroups.comSubject: Re: [Repeater-Builder] Still after Hi Kevin please tell me more. Diagrams etc 73 Steve - Original Message - From: Kevin King To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 2:45 AM Subject: RE: [Repeater-Builder] Still after Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Kevin King SCSA BSCIS ARS KC6OV GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of SteveSent: Thursday, July 21, 2005 9:40 AMTo: Repeater-Builder@yahoogroups.comSubject: [Repeater-Builder] Still after Hi Iam still after a 6mtr heliax duplexer. Iam in Liverpool UK So if any can or knows somebody who could make
RE: [Repeater-Builder] Still after
Most of the local restaurants gets their Hershey's syrup (for topping ice cream or for the milk shakes) in cans - 6 and an eighth inches diameter and 7 tall. I use them for covering 5 and 6 fireworks tubes while setting up the big shows. Yes, I'm one of the crazies that gets paid to makes things go BOOM in the night. Mike WA6ILQ At 12:59 PM 7/23/05, you wrote: hmm good point! I guess one shows his age by coffee being in a can! Ok so go to a restaurant and see if they have the big cans that tomato sauce or vegetables may come in. Is that still packed in a can? Kevin King SCSA BSCIS ARS KC6OVD GMRS KAG0378 EIEIO 2722 Acworth Georgia -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Kris Kirby Sent: Friday, July 22, 2005 11:04 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Still after On Thu, 21 Jul 2005, Kevin King wrote: Try a set of coffee can duplexers. 20 bucks of plumbing hardware and bingo Can you still buy coffee in cans? How do you weld those suckers together? -- Kris Kirby [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security 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/
[Repeater-Builder] VHF Splitter
Ham club wishes to use one VHF receive antenna for three different VHF receive systems. Two VHF repeaters and one packet digit. Any suggestions on how this can be done and where is the best place in the antenna system to install a preamp? Transmitters are combined and use separate antenna. 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] VHF Splitter
At 06:01 PM 7/23/2005, drwoolweaver wrote: Ham club wishes to use one VHF receive antenna for three different VHF receive systems. Two VHF repeaters and one packet digit. Any suggestions on how this can be done and where is the best place in the antenna system to install a preamp? Transmitters are combined and use separate antenna. I do this at home, with nothing more than a radio shack 1 in , four out TV amplifier, with FM trap. Basically, you'll need a wilkinson divider, which is what a TV splitter is. Mini-circuits sells precision 50 ohm types. If you need, amplification and filtering can be done either before the splitter, if all the frequencies are close enough, or after the splitter with more narrow filters. 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] VHF Splitter
Be careful ! Won't the packet digi also transmit on the same antenna line ? Thereby destroying the other receivers ?? -- Original message -- At 06:01 PM 7/23/2005, drwoolweaver wrote: Ham club wishes to use one VHF receive antenna for three different VHF receive systems. Two VHF repeaters and one packet digit. Any YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. 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] VHF Splitter
The most common method of using one receive antenna with multiple receivers is a multicoupler. This device usually has some sort of preselector followed by a preamplifier feeding a two-, four-, or eight-way splitter. The gain of the amplifier is selected to just overcome the losses in the preselector and splitter. I assume that your packet digipeater has separate TX and RX connections, so that it won't transmit back into the multicoupler. 73, Eric Lemmon WB6FLY drwoolweaver wrote: Ham club wishes to use one VHF receive antenna for three different VHF receive systems. Two VHF repeaters and one packet digit. Any suggestions on how this can be done and where is the best place in the antenna system to install a preamp? Transmitters are combined and use separate antenna. 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] VHF Maxtrac Power Output
Brian, Most MaxTrac radios will run okay at 50% power, and some will go lower and still be stable. However, be aware that a radio that is rock-steady when feeding a resistive dummy load may go bonkers when feeding a reactive load such as an antenna or cavity. It's always a good idea to look at the TX signal on a spectrum analyzer while feeding the intended load rather than a dummy load. It may make a big difference if a ferrite isolator is on the TX output to provide a stable load impedance. 73, Eric Lemmon WB6FLY [EMAIL PROTECTED] wrote: Hi All! I'm wiring up a temporary repeater using 2 16 pin VHF Maxtracs and a 7k. All is fine, my question is there a safe power level when used in repeater use with Fans? I know that micors, (my bread and butter) don't like less than 50-60% power. Is this the same with Maxtracs? It's a 40 watt VHF. Thought I'd ask before I blow anything up! Thanks,73 Brian WD9HSY --- YAHOO! GROUPS LINKS + Visit your group Repeater-Builder on the web. + To unsubscribe from this group, send an email to: [EMAIL PROTECTED] + Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. --- 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] Question Motorola Quantar VHF ?
does any have the link to the specs. on the Quantar repeaters? thanks John - Original Message - From: ANTHONY [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 4:19 PM Subject: [Repeater-Builder] Question Motorola Quantar VHF ? Has anybody in this group play around with Motorola Quantar VHF Repeater Like it and the performance of it ?Regards ANTHONY W4NCR 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] Re: Use a band pass filter between pass-reject duplexer and antenna?
Eric Lemmon WB6FLY gave the best response to my question of how common is it to place a bandpass fillter betweeen antenna and duplexer. Most assumed a ham repeater with tx circulator and high rejection pass/reject duplexer which is correct. As I read the resposes it seems the answer is: this is not very common at all and not the best way to lower a nose floor to increase Rx sensitivy. It also adds to Tx power loss by a few dB. If broad enough to pass both Tx and Rx then the skirts are too broad to be helpful in eliminating RF from near by out of ham band high power transmitters. The repeater owner said he allowed a radio shop to install it that way, but it did NOT do the job of lowering the noise floor as promised. I questioned the wisdom, but thought I would ask if others had do it that way and why. --- In Repeater-Builder@yahoogroups.com, Eric Lemmon [EMAIL PROTECTED] wrote: I'm responding to you directly, as well as to the list, because your question is a very good one that should be answered publicly. Without much fear of contradiction, I will state that a bandpass/bandreject duplexer has precious little bandpass effect. Sure, when you look at a response plot that covers 10 MHz, it may look very selective, but in reality the bandpass action is rather subtle. A whole lot of RF can blow through a Bp/Br duplexer in either direction, but MOST of the time this deficiency doesn't cause a problem. I would not put a BP cavity between the duplexer and the antenna, simply because such a cavity would diminish the function of the duplexer. Now, if you want to put a preamp between the duplexer and the receiver, a BP cavity tuned to the receive frequency is a very good idea. This BP filter should follow the duplexer and precede the preamp. Two 8 cavities with 1.0 dB IL work well. If you have a solid-state PA that has significant sideband noise, you might consider placing a BP filter between the PA and the duplexer. If you are using a ferrite isolator to protect the PA, a BP cavity filter between the isolator and the duplexer can take the place of a 2nd- harmonic notch filter or low-pass filter. At a crowded commercial site, you may be required to have a BP cavity on the TX side. 73, Eric Lemmon WB6FLY w7aor wrote: How common is it to use a band pass filter ahead of a pass-reject duplexer, i.e., between the duplexer and feed line to antenna. Any reason for adding a band pass filter there on antenna input to duplexer vs. between the preamp pre selector cavities receiver port of duplexer. Please respond to w7aor @narri.org 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] What is available for IRLP equipement
The only interface for IRLP is the card available from them. It's available from www.irlp.net You can also add echolink to an IRLP node via the EchoIRLP project www.echoirlp.com It works really well and makes a nice single PC/radio setup. Steve, kf6fkk - Original Message - From: n9lv [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 8:14 AM Subject: [Repeater-Builder] What is available for IRLP equipement I'm looking for information on IRLP and Echolink connection devices. What is good, what works and what does not? How difficult is it to get them set up and running? 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] Re: Use a band pass filter between pass-reject duplexer and antenna?
--- w7aor [EMAIL PROTECTED] wrote: Eric Lemmon WB6FLY gave the best response to my question of how common is it to place a bandpass fillter betweeen antenna and duplexer. Most assumed a ham repeater with tx circulator and high rejection pass/reject duplexer which is correct. About 25 years ago I had Wacom retrofit a 4 cavity bp/br 2 meter duplexer with two pass cavities. One for the receive side to provide out of band rejection and one on the transmitt side to make it ballanced looking if for nothing else. The repeater was in an area with lots of other transmitters near it. Must have been over 100 antennas in a 3 block area. Later I noticed they were offering that design in their catalog. Seems most bp/br duplexers do not really have taht much rejection of out of band signals. Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs 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] Re: Question Motorola Quantar VHF ?
HEY Thanks good here !!! Anthony Wilmington NC W4NCR --- In Repeater-Builder@yahoogroups.com, T.J. [EMAIL PROTECTED] wrote: Yep, love it they work great, and I've got mine up and working on APCO 25 digital for those few that have newer digital capable radios. ANTHONY [EMAIL PROTECTED] wrote:Has anybody in this group play around with Motorola Quantar VHF Repeater Like it and the performance of it ? Regards ANTHONY W4NCR 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] Re: Use a band pass filter between pass-reject duplexer and antenna?
Hi all, This topic is very well described in an article (on Kevin's website) by Jacques Audet VE2AZX. It is a large file but well worth the time downloading. You will find an excellent explanation of the various types of duplexers in which, at the end, he recommends this discussed configuration as the best combination of cavities to form a good duplexer. Go to this link http://www.repeater-builder.com/rbtip/ant-sys-index.html And scroll down to the article in PDF format Theory and Testing of Duplexers by Jacques Audet VE2AZX This is a large (60 pages) technical write-up that should be titled Duplexers 101. Well worth reading. 73, Tony VE3DWI ** Eric Lemmon WB6FLY gave the best response to my question of how common is it to place a bandpass fillter betweeen antenna and duplexer. Most assumed a ham repeater with tx circulator and high rejection pass/reject duplexer which is correct. About 25 years ago I had Wacom retrofit a 4 cavity bp/br 2 meter duplexer with two pass cavities. One for the receive side to provide out of band rejection and one on the transmitt side to make it ballanced looking if for nothing else. The repeater was in an area with lots of other transmitters near it. Must have been over 100 antennas in a 3 block area. Later I noticed they were offering that design in their catalog. Seems most bp/br duplexers do not really have taht much rejection of out of band signals. Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs 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/ YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] HMN3013A Microphone??
Does anyone have the manual or at least the pinout connections for the plug on a Motorola HMN3013A DTMF microphone? I am interested in using this mic on an MVS radio. I believe it is normally set up for a Maxtrac 800. Gary - W5GNB 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] VHF Maxtrac Power Output
50% is ok with heavy cooling. Use a short TAIL though to minimize heat build-up andy Start your day with Yahoo! - make it your home page YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. 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] Question Motorola Quantar VHF ?
They are current production, so check Motorolas web site. Mike WA6ILQ At 06:08 PM 7/23/05, you wrote: does any have the link to the specs. on the Quantar repeaters? thanks John - Original Message - From: ANTHONY [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 4:19 PM Subject: [Repeater-Builder] Question Motorola Quantar VHF ? Has anybody in this group play around with Motorola Quantar VHF Repeater Like it and the performance of it ?Regards ANTHONY W4NCR 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] Question Motorola Quantar VHF ?
Here is the info on VHF... http://www.vsp.state.va.us/STARSContract/Appendix%2005%20-%2015%20-%20VHF%20Quantar%20Repeater.pdf Bryon K0BSJ At 08:08 PM 7/23/2005, you wrote: does any have the link to the specs. on the Quantar repeaters? thanks John - Original Message - From: ANTHONY [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, July 22, 2005 4:19 PM Subject: [Repeater-Builder] Question Motorola Quantar VHF ? Has anybody in this group play around with Motorola Quantar VHF Repeater Like it and the performance of it ? Regards ANTHONY W4NCR 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/ YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
