Re: [Repeater-Builder] Mobile Repeaters?
At 12/30/2004 03:39 PM, you wrote: Is the best way to have a mobile repeater up and running with two mobile radios and a duplexer? Looking for a way to be able to run a couple of repeaters, one VHF, one UHF for a mobile communications van. Can anyone recommend ways to cut down on weight and space? Thanks Dakota I suggest using commercial equipment. A single G.E. MVP radio will run duplex probably take up less room than 2 amateur grade mobiles. The ham gear, although synthesized, will require more isolation due to the receiver not being designed for high RF environments. I use MVPs for my UHF repeaters mainly because of the small size - I'm space-constrained at most of my sites. They work very well in high RF environments their TXs can run continuous duty by adding a fan and/or heat sink to the back of the radio. They can duplex on a single antenna using just a small 6-section flat-pack mobile duplexer. The one minus is that the stock RX is a bit deaf (spec is 0.35 uV for 12 dB SINAD, mine are a bit worse probably due to the helical resonators being a bit out of spec'd 450-470 MHz range). The G.E. UHS preamp brings it down to below 0.2 uV but for best performance use a GaAsFET preamp from Angle Linear or ARR. The VHF MVP works great too generally doesn't need a preamp. In metropolitan areas the receiver's noise temperature is comparable to that of your antenna at 2 meters. Of course for 600 kHz splits you're going to need a rather unportable duplexer. An alternative to the big duplexer is to run a wide split use a VHF mobile duplexer carefully tuned down to ~2.5 MHz spacing; there are many 6-section units that will just make it down to this split. Here in SoCal we have a special pair in the bandplan just for these portapeaters: 147.585 input, 144.93 output (+2.655 MHz split). See the articles at http://www.repeater-builder.com/ge/mvp/no6bmvpconversion.html, http://www.repeater-builder.com/ge/mvp/mvpstepbystep.html http://www.repeater-builder.com/ge/mvpconversion.html for info on repeaterizing these nice radios yourself or by the list owner. Bob NO6B 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] Mobile Repeaters?
Get a couple of Motorola Maxtracs, an NHRC-2 Controller and you are set. EXCEPT, if it's for Public Safety purposes (Fire, Police) then do not scrimp, especially if lives may depend on this stuff. 73, Dick, W1KSZ -Original Message- From: Dakota Summerhawk [mailto:[EMAIL PROTECTED] Sent: Thursday, December 30, 2004 6:40 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mobile Repeaters? Is the best way to have a mobile repeater up and running with two mobile radios and a duplexer? Looking for a way to be able to run a couple of repeaters, one VHF, one UHF for a mobile communications van. Can anyone recommend ways to cut down on weight and space? Thanks Dakota -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 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] Speaker Level Mixing
Maybe not the most compact option but you can just use a stereo to mono transformer such as a Speco TSM-30 http://www.lashen.com/vendors/CSISpeco/Speakers/Transformers.asp Steve P. - Original Message - From: DCFluX [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 30, 2004 10:48 AM Subject: [Repeater-Builder] Speaker Level Mixing Anyone had experience with mixing the speaker output of 2 radios, Say Motorola GM300's to one speaker? I originally tried a couple of resistors but I may have the wrong values as they got hot as hell and one started smoking, I was using 2 .82 ohm at 2 watt resistors for each radio, one resistor in each speaker lead and at the center the speaker. My next best guess is using a multiple winding transformer with three windings of 4 ohms, but finding information on how to wind a transformer to do that is impossible these days. Any Ideas? 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: Off topic part 95 DCS on GMRS
I agree that re-education of some FCC employees is needed. However, I think it would be nice if the FCC had at least 2 or 3 knowledgable people, that knew what they were doing and only worked with Part 95 stuff. Johnny corwinmoore wrote: --- In Repeater-Builder@yahoogroups.com, Barry Thompson [EMAIL PROTECTED] wrote: Thanks to Russ, I contacted the FCC WTB regarding the usage of DCS/DPL or anything other than common tone names like PL from the Motorola trade mark and was confirmed that anything other than PL was not authorized under part 95.181 sub section G H. Like Joe said, this is completely off-base. Please give us the name of the WTB employee who made this statement. (There are FCC procedures for mandatory re-education of employees who give out erroneous information. And it goes into their personnel file.) - Corwin Moore (PRSG) 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: Mobile Repeaters?
I use EchoStation as a repeater, Fast setup for Emergency use or just in case you need a Repeater or backup. I started using it while my Repeater was under repairs, liked its range and audio better so I use it full time now. My Repeater is the backup for Echostation now. How ever I do have it loaded on stand by computers just in case . No reason for any Repeater to be down for repairs using this . ,, --- In Repeater-Builder@yahoogroups.com, Dakota Summerhawk [EMAIL PROTECTED] wrote: Is the best way to have a mobile repeater up and running with two mobile radios and a duplexer? Looking for a way to be able to run a couple of repeaters, one VHF, one UHF for a mobile communications van. Can anyone recommend ways to cut down on weight and space? Thanks Dakota -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 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: Off topic part 95 DCS on GMRS
I'd prefer mandatory retirement. I don't know that Powell can be re-educated. He's screwed up everything he touched since coming to the FCC. Why should BPL be any different :( Karl, WA5TMC Steve Grantham wrote: Can we solicit the mandatory re-education of Chairman Powell, as he has been erroneously promoting BPL as a panacea, when in reality it is a pandora's box? Steve ;) - Original Message - From: corwinmoore [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 30, 2004 6:53 AM Subject: [Repeater-Builder] Re: Off topic part 95 DCS on GMRS --- In Repeater-Builder@yahoogroups.com, Barry Thompson [EMAIL PROTECTED] wrote: Thanks to Russ, I contacted the FCC WTB regarding the usage of DCS/DPL or anything other than common tone names like PL from the Motorola trade mark and was confirmed that anything other than PL was not authorized under part 95.181 sub section G H. Like Joe said, this is completely off-base. Please give us the name of the WTB employee who made this statement. (There are FCC procedures for mandatory re-education of employees who give out erroneous information. And it goes into their personnel file.) - Corwin Moore (PRSG) 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: Speaker Level Mixing
Go over to your local car stereo shop - the place where they sell those 500w amps and build the latest and greatest boogie buggys or thump trucks - and get a pair of speaker isolator transformers. They may not call them that, but picture a 8 ohm in / 8 ohm out transformer about the size of a can of Coke or Pepsi, or a little smaller. Put one on each radio. Test by putting a speaker on the secondary. It should work normally. Unhook the speakers. Wire the secondaries and the speaker all in parallel. A friend has two of these setups in his vehicle, on two Kenwood 742s... one radio is 10m / 6m / 2m and the other is 220 / 440 / 1200mhz, and each radio has two speaker outputs - the selected channel and the nonselected channels. He has the selected channels fed to one speaker (in the left door) and the non-selected channels fed to a second speaker (in the right door). Car stereo shops have a few things to offer the ham - like decent multiple fuseblocks, good automotive DC wire, and speaker transformers. It's worth spending an hour perusing their offerings... Mike WA6ILQ --- In Repeater-Builder@yahoogroups.com, DCFluX [EMAIL PROTECTED] wrote: Anyone had experience with mixing the speaker output of 2 radios, Say Motorola GM300's to one speaker? I originally tried a couple of resistors but I may have the wrong values as they got hot as hell and one started smoking, I was using 2 .82 ohm at 2 watt resistors for each radio, one resistor in each speaker lead and at the center the speaker. My next best guess is using a multiple winding transformer with three windings of 4 ohms, but finding information on how to wind a transformer to do that is impossible these days. Any Ideas? 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: Speaker Level Mixing
I wouldn't trust the local stereo shops as far as I could throw them. Example: I saw a certified installer cut 8 inches of zip cord off of the reel Then he split it into 2 wires and then butt spliced the wires back to the original reel of wire! I didn't even bother to make him feel like a dumb ass, I just left. Also I need something a little smaller than a coke can, preferably 2.5 X 1.9 square, height doesn't matter, but needs to solder to a PCB. On Thu, 30 Dec 2004 18:18:49 -0800, Mike Morris WA6ILQ [EMAIL PROTECTED] wrote: Go over to your local car stereo shop - the place where they sell those 500w amps and build the latest and greatest boogie buggys or thump trucks - and get a pair of speaker isolator transformers. They may not call them that, but picture a 8 ohm in / 8 ohm out transformer about the size of a can of Coke or Pepsi, or a little smaller. Put one on each radio. Test by putting a speaker on the secondary. It should work normally. Unhook the speakers. Wire the secondaries and the speaker all in parallel. A friend has two of these setups in his vehicle, on two Kenwood 742s... one radio is 10m / 6m / 2m and the other is 220 / 440 / 1200mhz, and each radio has two speaker outputs - the selected channel and the nonselected channels. He has the selected channels fed to one speaker (in the left door) and the non-selected channels fed to a second speaker (in the right door). Car stereo shops have a few things to offer the ham - like decent multiple fuseblocks, good automotive DC wire, and speaker transformers. It's worth spending an hour perusing their offerings... Mike WA6ILQ --- In Repeater-Builder@yahoogroups.com, DCFluX [EMAIL PROTECTED] wrote: Anyone had experience with mixing the speaker output of 2 radios, Say Motorola GM300's to one speaker? I originally tried a couple of resistors but I may have the wrong values as they got hot as hell and one started smoking, I was using 2 .82 ohm at 2 watt resistors for each radio, one resistor in each speaker lead and at the center the speaker. My next best guess is using a multiple winding transformer with three windings of 4 ohms, but finding information on how to wind a transformer to do that is impossible these days. Any Ideas? 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: Speaker Level Mixing
I think the Motorola Mitrek Consolette Base Station has a one to one transformer in it. If you need I can look up the part number. Neil - WA6KLA DCFluX wrote: I wouldn't trust the local stereo shops as far as I could throw them. Example: I saw a certified installer cut 8 inches of zip cord off of the reel Then he split it into 2 wires and then butt spliced the wires back to the original reel of wire! I didn't even bother to make him feel like a dumb ass, I just left. Also I need something a little smaller than a coke can, preferably 2.5 X 1.9 square, height doesn't matter, but needs to solder to a PCB. On Thu, 30 Dec 2004 18:18:49 -0800, Mike Morris WA6ILQ [EMAIL PROTECTED] wrote: Go over to your local car stereo shop - the place where they sell those 500w amps and build the latest and greatest boogie buggys or thump trucks - and get a pair of speaker isolator transformers. They may not call them that, but picture a 8 ohm in / 8 ohm out transformer about the size of a can of Coke or Pepsi, or a little smaller. Put one on each radio. Test by putting a speaker on the secondary. It should work normally. Unhook the speakers. Wire the secondaries and the speaker all in parallel. A friend has two of these setups in his vehicle, on two Kenwood 742s... one radio is 10m / 6m / 2m and the other is 220 / 440 / 1200mhz, and each radio has two speaker outputs - the selected channel and the nonselected channels. He has the selected channels fed to one speaker (in the left door) and the non-selected channels fed to a second speaker (in the right door). Car stereo shops have a few things to offer the ham - like decent multiple fuseblocks, good automotive DC wire, and speaker transformers. It's worth spending an hour perusing their offerings... Mike WA6ILQ --- In Repeater-Builder@yahoogroups.com, DCFluX [EMAIL PROTECTED] wrote: Anyone had experience with mixing the speaker output of 2 radios, Say Motorola GM300's to one speaker? I originally tried a couple of resistors but I may have the wrong values as they got hot as hell and one started smoking, I was using 2 .82 ohm at 2 watt resistors for each radio, one resistor in each speaker lead and at the center the speaker. My next best guess is using a multiple winding transformer with three windings of 4 ohms, but finding information on how to wind a transformer to do that is impossible these days. Any Ideas? 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] Re: Speaker Level Mixing
I've always done it differently. I take a 5 watt resistor, maybe around 15 ohms, across the speaker leads, then come off the high side through a 2-5K resistor then into a little external audio amp. You can pick up a little audio amp kit for less than $10. Drive the single speaker with that. You can mix lots of audio sources together. Chuck WB2EDV - Original Message - From: DCFluX [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 30, 2004 9:25 PM Subject: Re: [Repeater-Builder] Re: Speaker Level Mixing I wouldn't trust the local stereo shops as far as I could throw them. Example: I saw a certified installer cut 8 inches of zip cord off of the reel Then he split it into 2 wires and then butt spliced the wires back to the original reel of wire! I didn't even bother to make him feel like a dumb ass, I just left. Also I need something a little smaller than a coke can, preferably 2.5 X 1.9 square, height doesn't matter, but needs to solder to a PCB. On Thu, 30 Dec 2004 18:18:49 -0800, Mike Morris WA6ILQ [EMAIL PROTECTED] wrote: Go over to your local car stereo shop - the place where they sell those 500w amps and build the latest and greatest boogie buggys or thump trucks - and get a pair of speaker isolator transformers. They may not call them that, but picture a 8 ohm in / 8 ohm out transformer about the size of a can of Coke or Pepsi, or a little smaller. Put one on each radio. Test by putting a speaker on the secondary. It should work normally. Unhook the speakers. Wire the secondaries and the speaker all in parallel. A friend has two of these setups in his vehicle, on two Kenwood 742s... one radio is 10m / 6m / 2m and the other is 220 / 440 / 1200mhz, and each radio has two speaker outputs - the selected channel and the nonselected channels. He has the selected channels fed to one speaker (in the left door) and the non-selected channels fed to a second speaker (in the right door). Car stereo shops have a few things to offer the ham - like decent multiple fuseblocks, good automotive DC wire, and speaker transformers. It's worth spending an hour perusing their offerings... Mike WA6ILQ --- In Repeater-Builder@yahoogroups.com, DCFluX [EMAIL PROTECTED] wrote: Anyone had experience with mixing the speaker output of 2 radios, Say Motorola GM300's to one speaker? I originally tried a couple of resistors but I may have the wrong values as they got hot as hell and one started smoking, I was using 2 .82 ohm at 2 watt resistors for each radio, one resistor in each speaker lead and at the center the speaker. My next best guess is using a multiple winding transformer with three windings of 4 ohms, but finding information on how to wind a transformer to do that is impossible these days. Any Ideas? 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] Mobile Repeaters?
Use portables... Joe M. Dakota Summerhawk wrote: Is the best way to have a mobile repeater up and running with two mobile radios and a duplexer? Looking for a way to be able to run a couple of repeaters, one VHF, one UHF for a mobile communications van. Can anyone recommend ways to cut down on weight and space? Thanks Dakota -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 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: Speaker Level Mixing
How much less are you wanting to spend.. I've searched around the net and it's a fairly specialized item. Using 1:1 transformers you'd have to buy 2. Given that, $14 doesn't seem too bad.From looking at the picture it appears the transformer is about 2x1.75x1.5 not counting the mounting ears... definitely smaller than a coke can. BTW. Finally found it on the mfr's website http://www.specotech.com/cart/products/productDetails.asp?prodID=437 Steve P. - Original Message - From: DCFluX [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 30, 2004 6:25 PM Subject: Re: [Repeater-Builder] Re: Speaker Level Mixing I wouldn't trust the local stereo shops as far as I could throw them. Example: I saw a certified installer cut 8 inches of zip cord off of the reel Then he split it into 2 wires and then butt spliced the wires back to the original reel of wire! I didn't even bother to make him feel like a dumb ass, I just left. Also I need something a little smaller than a coke can, preferably 2.5 X 1.9 square, height doesn't matter, but needs to solder to a PCB. On Thu, 30 Dec 2004 18:18:49 -0800, Mike Morris WA6ILQ [EMAIL PROTECTED] wrote: Go over to your local car stereo shop - the place where they sell those 500w amps and build the latest and greatest boogie buggys or thump trucks - and get a pair of speaker isolator transformers. They may not call them that, but picture a 8 ohm in / 8 ohm out transformer about the size of a can of Coke or Pepsi, or a little smaller. Put one on each radio. Test by putting a speaker on the secondary. It should work normally. Unhook the speakers. Wire the secondaries and the speaker all in parallel. A friend has two of these setups in his vehicle, on two Kenwood 742s... one radio is 10m / 6m / 2m and the other is 220 / 440 / 1200mhz, and each radio has two speaker outputs - the selected channel and the nonselected channels. He has the selected channels fed to one speaker (in the left door) and the non-selected channels fed to a second speaker (in the right door). Car stereo shops have a few things to offer the ham - like decent multiple fuseblocks, good automotive DC wire, and speaker transformers. It's worth spending an hour perusing their offerings... Mike WA6ILQ --- In Repeater-Builder@yahoogroups.com, DCFluX [EMAIL PROTECTED] wrote: Anyone had experience with mixing the speaker output of 2 radios, Say Motorola GM300's to one speaker? I originally tried a couple of resistors but I may have the wrong values as they got hot as hell and one started smoking, I was using 2 .82 ohm at 2 watt resistors for each radio, one resistor in each speaker lead and at the center the speaker. My next best guess is using a multiple winding transformer with three windings of 4 ohms, but finding information on how to wind a transformer to do that is impossible these days. Any Ideas? 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] Re: Off topic part 95 DCS on GMRS
I think that I should stick to my thinking Have all the FCC Commissioners that are from each level Qualification 1) That they have a Extra Class License. 2) Hold a Degree in Electronics like Broadcasting. 3) Been say 20 Yrs Min. in the feild. 4) Hold a GROL , 1st. Class RT that was converted to GROL . Thats my opinion and I am sticking to my story M. H. - Original Message - From: Steve Grantham [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 30, 2004 11:19 AM Subject: Re: [Repeater-Builder] Re: Off topic part 95 DCS on GMRS Can we solicit the mandatory re-education of Chairman Powell, as he has been erroneously promoting BPL as a panacea, when in reality it is a pandora's box? Steve ;) - Original Message - From: corwinmoore [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 30, 2004 6:53 AM Subject: [Repeater-Builder] Re: Off topic part 95 DCS on GMRS --- In Repeater-Builder@yahoogroups.com, Barry Thompson [EMAIL PROTECTED] wrote: Thanks to Russ, I contacted the FCC WTB regarding the usage of DCS/DPL or anything other than common tone names like PL from the Motorola trade mark and was confirmed that anything other than PL was not authorized under part 95.181 sub section G H. Like Joe said, this is completely off-base. Please give us the name of the WTB employee who made this statement. (There are FCC procedures for mandatory re-education of employees who give out erroneous information. And it goes into their personnel file.) - Corwin Moore (PRSG) 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: Speaker Level Mixing
At 06:25 PM 12/30/04, you wrote: I wouldn't trust the local stereo shops as far as I could throw them. Example: I saw a certified installer cut 8 inches of zip cord off of the reel Then he split it into 2 wires and then butt spliced the wires back to the original reel of wire! I didn't even bother to make him feel like a dumb ass, I just left. OK, so you feel that one technician was an ass. Does that make all shops worthless? And all the products they sell? If one McDonalds shorts me on an order, that does not convict all McDonalds locations. Also I need something a little smaller than a coke can, preferably 2.5 X 1.9 square, height doesn't matter, but needs to solder to a PCB. Any audio transformer that has enough iron in it to handle the audio output of a Maxtrac at full volume without saturating (i.e. several watts) is not going to be tiny. The coke can transformers I saw were 50 watt units. There are smaller ones - a lot of the dash mount receivers are in the 30-35w region. There are others that handle 10-15 watts. Just look around. Maybe in another, different, stereo shop. You asked for something to scratch your itch. I gave you an idea. You are welcome. Mike On Thu, 30 Dec 2004 18:18:49 -0800, Mike Morris WA6ILQ [EMAIL PROTECTED] wrote: Go over to your local car stereo shop - the place where they sell those 500w amps and build the latest and greatest boogie buggys or thump trucks - and get a pair of speaker isolator transformers. They may not call them that, but picture a 8 ohm in / 8 ohm out transformer about the size of a can of Coke or Pepsi, or a little smaller. Put one on each radio. Test by putting a speaker on the secondary. It should work normally. Unhook the speakers. Wire the secondaries and the speaker all in parallel. A friend has two of these setups in his vehicle, on two Kenwood 742s... one radio is 10m / 6m / 2m and the other is 220 / 440 / 1200mhz, and each radio has two speaker outputs - the selected channel and the nonselected channels. He has the selected channels fed to one speaker (in the left door) and the non-selected channels fed to a second speaker (in the right door). Car stereo shops have a few things to offer the ham - like decent multiple fuseblocks, good automotive DC wire, and speaker transformers. It's worth spending an hour perusing their offerings... Mike WA6ILQ --- In Repeater-Builder@yahoogroups.com, DCFluX [EMAIL PROTECTED] wrote: Anyone had experience with mixing the speaker output of 2 radios, Say Motorola GM300's to one speaker? I originally tried a couple of resistors but I may have the wrong values as they got hot as hell and one started smoking, I was using 2 .82 ohm at 2 watt resistors for each radio, one resistor in each speaker lead and at the center the speaker. My next best guess is using a multiple winding transformer with three windings of 4 ohms, but finding information on how to wind a transformer to do that is impossible these days. Any Ideas? 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: Outlet for RG214/U
--- In Repeater-Builder@yahoogroups.com, Neil McKie [EMAIL PROTECTED] wrote: Nah, I remember buying some when I was working a the coast during the 80's. Something like $5 or $6 per foot. --Clipped-- I checked a few sources - BOR (Bust-Out Retail) real Belden Silver Plated RG214 *is* about $5.50 a foot. Others, like Coleman, are allot less. Standard (nickle plate) RG214 was in Tessco's Outlet at $0.89 a foot. So if making jumpers, not going hundreds of feet, nickle plated would do fine for me. (BTW - half-inch hardline, like the venerable Andrews LDF4-50, is about $2-$3 a foot if you shop.) 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: Speaker Level Mixing
Yes, it works really, really well!! I used to use two speakers for four separate radios in my 1961 Dodge Seneca during the mid-sixties. I didn't use the 'big capacitor' either. If one of the radios was not turned on, it worked anyway. I simply 'refuse' to tell you it won't work because I do know better. 73, Neil - WA6KLA Joe Montierth wrote: Here's what you can do if both radios are transformerless and have a single hot side and a ground side. This will not work if both speaker leads are hot, this will only work if the speaker amp goes through a big capacitor then to the speaker, the other side grounded: Wire the hot side of each speaker output to one side of the speaker, no ground needed. Both radios need to be on for this to work. I did this for years in a company truck, so I don't want to hear from you nay-sayers that it won't work. If you don't want to monitor one of the radios, it needs to be on anyway, and the volume turned down. Radio A-speaker---Radio B I could explain how this works, but first I want everyone to tell me that it won't work, will destroy the radio, will sould bad, etc., because thats what happens anytime I share this with someone. :) Joe --- DCFluX [EMAIL PROTECTED] wrote: Thats what I wanted to do, but this has to be a discrete solution. The radios have BTL output. On Thu, 30 Dec 2004 19:03:04 -, Coy Hilton [EMAIL PROTECTED] wrote: Yep, Use a Opamp mixer followed by a audio PA chip. You can build the mixer real cheap and depending on how much audio power that you need that can be had cheap too. Some audio PA chips now drive the speaker BTL ( neither side grounded... the speaker is driven differentially ) You'r lucky that you didn't smoke one or both Audio PAs in the radios. Not only were you driving the attached speaker but, you were back driving the other radios audio output section. Oh, you'll also need to load both radio outputs with a resister of 8 or ten ohms. 73 AC0Y --- In Repeater-Builder@yahoogroups.com, DCFluX [EMAIL PROTECTED] wrote: Anyone had experience with mixing the speaker output of 2 radios, Say Motorola GM300's to one speaker? I originally tried a couple of resistors but I may have the wrong values as they got hot as hell and one started smoking, I was using 2 .82 ohm at 2 watt resistors for each radio, one resistor in each speaker lead and at the center the speaker. My next best guess is using a multiple winding transformer with three windings of 4 ohms, but finding information on how to wind a transformer to do that is impossible these days. Any Ideas? __ Do you Yahoo!? Yahoo! Mail - You care about security. So do we. http://promotions.yahoo.com/new_mail 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] Off topic part 95 DCS on GMRS
Joe, no need to hide from the community with your concerns: Domain Name : NB.NET Created On : 1995-05-15 Expiration Date : 2008-05-16 Status : PROTECTED Registrant Name : The National Business Network Registrant Street1 : One Monroeville Center, Suite 850 Registrant City : Monroeville Registrant State/Province : US Registrant Postal Code : 15146 Registrant Country : US Admin Handle : HL4222 Admin Name : THE NATIONAL BUSINES Admin Street1 : One Monroeville Center Admin Street2 : Suite 850 Admin City : Monroeville Admin State/Province : US Admin Postal Code : 15146 Admin Country : US Admin Phone : +1.412810 Admin Email : [EMAIL PROTECTED] Tech Handle : HL4222 Tech Name : THE NATIONAL BUSINES Tech Street1 : One Monroeville Center Tech Street2 : Suite 850 Tech City : Monroeville Tech State/Province : US Tech Postal Code : 15146 Tech Country : US Tech Phone : +1.412810 Tech Email : [EMAIL PROTECTED] Billing Handle : HL4222 Billing Name : THE NATIONAL BUSINES Billing Street1 : One Monroeville Center Billing Street2 : Suite 850 Billing City : Monroeville Billing State/Province : US Billing Postal Code : 15146 Billing Country : US Billing Phone : +1.412810 Billing Email : [EMAIL PROTECTED] Name Server : NS1.NB.NET Name Server : NS2.NB.NET --- mch [EMAIL PROTECTED] wrote: I guess the users are better being limited to 38 tones rather than 142? It seems that having 142 choices would reduce tone reuse (wasn't that YOUR complaint?), but I'm not a GMRS guy, so I don't have to deal with it. I just can't wait until you have some other user cwitch from CDCSS to CTCSS on YOUR tone and justify it by claiming that 'all other 37 tones are also used, and he can't use CDCSS, so tone reuse is the only answer'. g Then, I bet your tone (pun intended) will change. Joe M. Barry Thompson wrote: Thanks to Russ, I contacted the FCC WTB regarding the usage of DCS/DPL or anything other than common tone names like PL from the Motorola trade mark and was confirmed that anything other than PL was not authorized under part 95.181 sub section G H. -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links http://groups.yahoo.com/group/Repeater-Builder/ [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Mail - Helps protect you from nasty viruses. http://promotions.yahoo.com/new_mail 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] Mobile Repeaters?
I must clarify that these are to be used as HAM radio special event repeaters for a comm van. Full duty use when in service but not used all the time, hence the reason that I need to be able to have some space in the van as it is also going to be command post as well. I need to be able to have some place to put them out of the way. Hope that helps. Dakota -Original Message- From: Richard W. Solomon [mailto:[EMAIL PROTECTED] Sent: Thursday, December 30, 2004 5:36 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Mobile Repeaters? Get a couple of Motorola Maxtracs, an NHRC-2 Controller and you are set. EXCEPT, if it's for Public Safety purposes (Fire, Police) then do not scrimp, especially if lives may depend on this stuff. 73, Dick, W1KSZ -Original Message- From: Dakota Summerhawk [mailto:[EMAIL PROTECTED] Sent: Thursday, December 30, 2004 6:40 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mobile Repeaters? Is the best way to have a mobile repeater up and running with two mobile radios and a duplexer? Looking for a way to be able to run a couple of repeaters, one VHF, one UHF for a mobile communications van. Can anyone recommend ways to cut down on weight and space? Thanks Dakota -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 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] Mobile Repeaters?
Look at the mobile repeaters found on ebay. About $800 ball park for them. They would work just fine if you did a split antenna setup, but would be better if duplexers were used, especially running that kind of power. If it is in the ham bands they will work fine, I don't think they are allowed in the GMRS bands though. Good Luck Mathew Portables are great but I need the 35W (UHF) and the 50W (VHF) out to assure that the coverage is adequate. Thanks for the suggestion. Dakota -Original Message- From: mch [mailto:[EMAIL PROTECTED] Sent: Thursday, December 30, 2004 8:13 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mobile Repeaters? Use portables... Joe M. Dakota Summerhawk wrote: Is the best way to have a mobile repeater up and running with two mobile radios and a duplexer? Looking for a way to be able to run a couple of repeaters, one VHF, one UHF for a mobile communications van. Can anyone recommend ways to cut down on weight and space? Thanks Dakota -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 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: Mobile Repeaters?
--- In Repeater-Builder@yahoogroups.com, Dakota Summerhawk [EMAIL PROTECTED] wrote: Portables are great but I need the 35W (UHF) and the 50W (VHF) out to assure that the coverage is adequate. Thanks for the suggestion. Dakota The G.E. MVPs will do 30 watts on 2 meters 25 on 440. It'd be nice if they did a bit more but I've never had a problem with inadequate TX range on my systems. If you must have 50/35 watts you'll need to go with something bigger, or sacrifice performance. No one will notice 1 or 2 dB less TX power. I forgot to mention previously that I have a VHF MVP configured as a wide-split 2 meter repeater. The entire package fits in a backpack is hand-carryable by a single person (including antenna). Nice when you have to install a repeater for a special event on a rooftop by yourself. Bob NO6B 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] Off topic part 95 DCS on GMRS
And the purpose of your post being? Big deal. You posted my email service's info. OMG! LOL The only purpose I can get from your post is a feeble attempt at providing some kind of 'classified' info (which ANYONE can get, BTW) on the remailer about my email service provider. Perhaps it's because YOU didn't like the answer I gave? You may not like it, but IF you are correct that CDCSS cannot be used on GMRS, I'm sure some who are using it will change to CTCSS, and I'm sure some of those users will choose a tone you are on since there will be a much smaller pool to choose from. It's statistics 101, not just my opinion. I didn't start this issue on the list - YOU DID by griping about CDCSS use on GMRS. Personally, I could care less. Ditto with the info you posted. I will suggest that you be glad I am not the type to 'retaliate' and post data about you including your FCC record (also public info). But, I'm not going to play your game. By not doing so, I win. :-P Have a nice day. Joe M. Barry Thompson wrote: Joe, no need to hide from the community with your concerns: Domain Name : NB.NET snip -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 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] Mobile Repeaters?
OK Dick on that note I have to ask a few questions: 1. How hard is it to build a Maxtrac into a repeater? 2. Are Maxtrac rock bound? Was hoping for something for synthesized for easy programming 3. How is the duty cycle for the unit? From what I have seen they are sturdy rigs and can stand up to a LOT of use. Can anyone answer these questions? Dick? Thanks for the information Dakota -Original Message- From: Richard W. Solomon [mailto:[EMAIL PROTECTED] Sent: Thursday, December 30, 2004 5:36 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Mobile Repeaters? Get a couple of Motorola Maxtracs, an NHRC-2 Controller and you are set. EXCEPT, if it's for Public Safety purposes (Fire, Police) then do not scrimp, especially if lives may depend on this stuff. 73, Dick, W1KSZ -Original Message- From: Dakota Summerhawk [mailto:[EMAIL PROTECTED] Sent: Thursday, December 30, 2004 6:40 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mobile Repeaters? Is the best way to have a mobile repeater up and running with two mobile radios and a duplexer? Looking for a way to be able to run a couple of repeaters, one VHF, one UHF for a mobile communications van. Can anyone recommend ways to cut down on weight and space? Thanks Dakota -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.7 - Release Date: 12/30/2004 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] Mobile Repeaters?
Portables are great but I need the 35W (UHF) and the 50W (VHF) out to assure that the coverage is adequate. Thanks for the suggestion. Dakota -Original Message- From: mch [mailto:[EMAIL PROTECTED] Sent: Thursday, December 30, 2004 8:13 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mobile Repeaters? Use portables... Joe M. Dakota Summerhawk wrote: Is the best way to have a mobile repeater up and running with two mobile radios and a duplexer? Looking for a way to be able to run a couple of repeaters, one VHF, one UHF for a mobile communications van. Can anyone recommend ways to cut down on weight and space? Thanks Dakota -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 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: Speaker Level Mixing
I will say this ... this one Stereo / Trucker shop and a source for older out of catalouge R/S stuff but he rather sell the stereos Illeagle gear , he does not like talking to me when I said I have a Ham license. tells you how many times he figgures the FCC was next in line :-) M. H. - Original Message - From: Mike Morris WA6ILQ [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, December 30, 2004 9:18 PM Subject: Re: [Repeater-Builder] Re: Speaker Level Mixing Go over to your local car stereo shop - the place where they sell those 500w amps and build the latest and greatest boogie buggys or thump trucks - and get a pair of speaker isolator transformers. They may not call them that, but picture a 8 ohm in / 8 ohm out transformer about the size of a can of Coke or Pepsi, or a little smaller. Put one on each radio. Test by putting a speaker on the secondary. It should work normally. Unhook the speakers. Wire the secondaries and the speaker all in parallel. A friend has two of these setups in his vehicle, on two Kenwood 742s... one radio is 10m / 6m / 2m and the other is 220 / 440 / 1200mhz, and each radio has two speaker outputs - the selected channel and the nonselected channels. He has the selected channels fed to one speaker (in the left door) and the non-selected channels fed to a second speaker (in the right door). Car stereo shops have a few things to offer the ham - like decent multiple fuseblocks, good automotive DC wire, and speaker transformers. It's worth spending an hour perusing their offerings... Mike WA6ILQ --- In Repeater-Builder@yahoogroups.com, DCFluX [EMAIL PROTECTED] wrote: Anyone had experience with mixing the speaker output of 2 radios, Say Motorola GM300's to one speaker? I originally tried a couple of resistors but I may have the wrong values as they got hot as hell and one started smoking, I was using 2 .82 ohm at 2 watt resistors for each radio, one resistor in each speaker lead and at the center the speaker. My next best guess is using a multiple winding transformer with three windings of 4 ohms, but finding information on how to wind a transformer to do that is impossible these days. Any Ideas? 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] Mobile Repeaters?
Be careful searching for mobile repeaters on eBay. A true LMR Mobile Repeater is a half-duplex unit that attaches to a mobile radio providing crossband coverage out of the car for portables. Not at all what you want. What you might want to look for is a portable repeater. Despite the name, a portable repeater can use mobile units for the TX and RX. Portable simply means that it can be moved around. BTW, I understand the need for higher power, but most portables have the same or (in the case of commercial portables) better sensitivity and selectivity than many ham grade mobiles, so they are still good candidates for receivers. The MVP is a good suggestion, but they are a little on the expensive side - especially on UHF. Still, if you can find one, they are good and there is the NHRC/MVP controller. Joe M. Mathew Quaife wrote: Look at the mobile repeaters found on ebay. About $800 ball park for them. They would work just fine if you did a split antenna setup, but would be better if duplexers were used, especially running that kind of power. If it is in the ham bands they will work fine, I don't think they are allowed in the GMRS bands though. Good Luck Mathew Portables are great but I need the 35W (UHF) and the 50W (VHF) out to assure that the coverage is adequate. Thanks for the suggestion. Dakota -Original Message- From: mch [mailto:[EMAIL PROTECTED] Sent: Thursday, December 30, 2004 8:13 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mobile Repeaters? Use portables... Joe M. Dakota Summerhawk wrote: Is the best way to have a mobile repeater up and running with two mobile radios and a duplexer? Looking for a way to be able to run a couple of repeaters, one VHF, one UHF for a mobile communications van. Can anyone recommend ways to cut down on weight and space? Thanks Dakota -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 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: Mobile Repeaters?
Mr. Dakota, You might want to look here for information on a Maxtrac. Radius, GM3xx, and other Motorola radios used in a portable repeater configuration. Klick on the Products, then Repeater ModuleBTW, the Repeater Module is less than $100 and IS Plug and Play!!! www.webimaging.com/echocomm/ 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] Need a picture
you couldn't find one at google images?? i think they even have your picture happy new year mdmEd Folta [EMAIL PROTECTED] wrote: HAPPY NEW YEAR TO ALLAnyone have a picture of a Standard Communications model 867 Radio?I am looking for an email-able jpeg etcEd FoltaYahoo! 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/ Ted Bleiman K9MDM MDM Radio Ltd - 1629-B N. 31 st Ave Melrose Park, IL 60160 708.681.0300 fax 708.681.9800 web http://www.mdmradio.com - Check it now!! Do you Yahoo!? Meet the all-new My Yahoo! Try it today! 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.
[Repeater-Builder] Need a picture
HAPPY NEW YEAR TO ALL Anyone have a picture of a Standard Communications model 867 Radio? I am looking for an email-able jpeg etc Ed Folta 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] Mobile Repeaters?
Our mobile repeater was as eazy as pie. We have a Kenwood for two meter, a Maggiore for 222 and a Kenwood for 440. We tie them all together with a Link-Com RLC-3 controler. We use TX/RX dupllexers on each band. Was not that costly and gives very good service. All housed in a nice rack mounted in the com-van. We are hopeful to add 927 MHz over the winter. 73 Russ, W3CH Trustee, Metro-Comm, INC W3PS repeater system. 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: Mobile Repeaters?
--- In Repeater-Builder@yahoogroups.com, mch [EMAIL PROTECTED] wrote: The MVP is a good suggestion, but they are a little on the expensive side - especially on UHF. Still, if you can find one, they are good and there is the NHRC/MVP controller. Joe M. Ummm Joe, I have picked up several UHF MVPs on Ebay in the past couple of months. I paid between $7 and $17 each for them (plus shipping of course). Have a great New Year. Laryn K8TVZ 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: Mobile Repeaters?
Chuck, it must be my raw, unmitigated bidding skill on Ebay. kidding here Actually I guess like you say, a little luck. Have a good New Year, Chuck. Laryn K8TVZ --- In Repeater-Builder@yahoogroups.com, Chuck Kelsey [EMAIL PROTECTED] wrote: Consider yourself lucky. They usually got for much more than that. Chuck WB2EDV Ummm Joe, I have picked up several UHF MVPs on Ebay in the past couple of months. I paid between $7 and $17 each for them (plus shipping of course). Have a great New Year. Laryn K8TVZ 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] Mobile Repeaters?
I have a 2-Watt MICOR UHF Ham Repeater (came from the factory in the 2-watt version) in service locally. The coverage is excellent. I've cooked a few 2-Meter PA decks over the years, and had to jumper around the PA deck to use just the 400 milliwatt exciter as the transmitter, while the PA deck was getting fixed. By the time it went through the three transmit cans of a 6-cavity duplexer, another pass can, all the jumpers, several hundred feet of old feedline, etc., I'd bet that there wasn't 100 milliwatts of power actually reaching the antenna. The coverage was excellent, only the people using mobile and portables behind some hills that were completely blocked seemed to notice that the Repeater wasn't up to its usual strong signal. This is on a very small hill, not some high mountaintop. If you have 10-20 watts for your repeater, you'll probably be surprised how well it works. LJ Original Message: - From: Dakota Summerhawk [EMAIL PROTECTED] Date: Thu, 30 Dec 2004 21:44:24 -0700 To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Mobile Repeaters? Portables are great but I need the 35W (UHF) and the 50W (VHF) out to assure that the coverage is adequate. Thanks for the suggestion. Dakota -Original Message- From: mch [mailto:[EMAIL PROTECTED] Sent: Thursday, December 30, 2004 8:13 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mobile Repeaters? Use portables... Joe M. Dakota Summerhawk wrote: Is the best way to have a mobile repeater up and running with two mobile radios and a duplexer? Looking for a way to be able to run a couple of repeaters, one VHF, one UHF for a mobile communications van. Can anyone recommend ways to cut down on weight and space? Thanks Dakota -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.6 - Release Date: 12/28/2004 Yahoo! Groups Links mail2web - Check your email from the web at http://mail2web.com/ . 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] Mobile Repeaters?
Larry, I agree with you on the coverage issue. My 2 meter repeater very near you, the PA deck quit several years ago. Ran the repeater on the 400 mw output exciter until we got the PA deck fixed. Like you, by the time the RF got to the antenna, I'd be surprised if there was more than 100 mw. The users apparently never noticed the difference in power output or they never said anything about it. 73, Neil - WA6KLA [EMAIL PROTECTED] wrote: I have a 2-Watt MICOR UHF Ham Repeater (came from the factory in the 2-watt version) in service locally. The coverage is excellent. I've cooked a few 2-Meter PA decks over the years, and had to jumper around the PA deck to use just the 400 milliwatt exciter as the transmitter, while the PA deck was getting fixed. By the time it went through the three transmit cans of a 6-cavity duplexer, another pass can, all the jumpers, several hundred feet of old feedline, etc., I'd bet that there wasn't 100 milliwatts of power actually reaching the antenna. The coverage was excellent, only the people using mobile and portables behind some hills that were completely blocked seemed to notice that the Repeater wasn't up to its usual strong signal. This is on a very small hill, not some high mountaintop. If you have 10-20 watts for your repeater, you'll probably be surprised how well it works. LJ Original Message: - From: Dakota Summerhawk [EMAIL PROTECTED] Date: Thu, 30 Dec 2004 21:44:24 -0700 To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Mobile Repeaters? Portables are great but I need the 35W (UHF) and the 50W (VHF) out to assure that the coverage is adequate. Thanks for the suggestion. Dakota -Original Message- From: mch [mailto:[EMAIL PROTECTED] Sent: Thursday, December 30, 2004 8:13 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mobile Repeaters? Use portables... Joe M. Dakota Summerhawk wrote: Is the best way to have a mobile repeater up and running with two mobile radios and a duplexer? Looking for a way to be able to run a couple of repeaters, one VHF, one UHF for a mobile communications van. Can anyone recommend ways to cut down on weight and space? Thanks Dakota - 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: Speaker Level Mixing
Depends actually Do you want to just mix the audio, or do you need the power from one or both radios to drive something? For this example, we know both radios have amplifiers with high output power levels (vs small receivers with lm386 type outputs). If you want to use the combined output to another single speaker, you should follow the mixed output with another speaker audio amplifier circuit. If you want to drive the input of a low level circuit, a simple resistor capacitor mixer circuit is all that's required. Sometimes I follow the mixed audio with a basic emitter follower transistor circuit. Each radio gets a 22 ohm 5 watt resistor on the external speaker leads, paying attention to what is considered the negative - lead and what lead is the positive + lead. The outputs of many/most radios and car stereos are now hybrid or bridged type outputs, meaning no ground. The no ground output is a big deal, if you short the negative lead to ground, you might blow the audio output amplifier. The 22 ohm resistor provides a load and developes a higher voltage at lower volume levels. The amp should like the light load just fine. Each resistive load negative speaker lead side is connected to a single following audio amplifer input ground through a capacitor (dc isolation). Each resistive load positive speaker lead side is connected to a single following audio amplifer input (audio high + side) through a series 10K resistor and a capacitor (dc isolation). If the trailing audio amplifier has enough power to drive your speaker at the desired volume level, you're done. If you need more information, I might be able to put up an example circuit on the sonic web page. The ARRL Handbook had a similar resistive speaker audio mixer circuit, but you had to include caps for dc isolation on the newer radios. FAR circuits still sells the pc board for not much money. The circuit has an on board lm-386 amplifer, which is probably not enough for mobile operation. Small 5 to 15 watt audio amplifier modules are pretty cheap. You can do it, just be carefull not to dc ground any side of the speaker output leads. cheers, skipp www.radiowrench.com/sonic DCFluX [EMAIL PROTECTED] wrote: Anyone had experience with mixing the speaker output of 2 radios, Say Motorola GM300's to one speaker? I originally tried a couple of resistors but I may have the wrong values as they got hot as hell and one started smoking, I was using 2 .82 ohm at 2 watt resistors for each radio, one resistor in each speaker lead and at the center the speaker. My next best guess is using a multiple winding transformer with three windings of 4 ohms, but finding information on how to wind a transformer to do that is impossible these days. Any Ideas? 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: Mobile Repeaters?
Consider yourself lucky. They usually got for much more than that. Chuck WB2EDV Ummm Joe, I have picked up several UHF MVPs on Ebay in the past couple of months. I paid between $7 and $17 each for them (plus shipping of course). Have a great New Year. Laryn K8TVZ 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: Mobile Repeaters?
Yes, they do. I usually sell them for around $75 each. But that's still a tremendous quality radio to make a repeater out of for a price like that. Anyone who can't afford something like that should think seriously about whether or not they want to be in the business of being a repeater owner. LJ Original Message: - From: Chuck Kelsey [EMAIL PROTECTED] Date: Fri, 31 Dec 2004 10:49:17 -0500 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Mobile Repeaters? Consider yourself lucky. They usually got for much more than that. Chuck WB2EDV Ummm Joe, I have picked up several UHF MVPs on Ebay in the past couple of months. I paid between $7 and $17 each for them (plus shipping of course). Have a great New Year. Laryn K8TVZ Yahoo! Groups Links mail2web - Check your email from the web at http://mail2web.com/ . 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] Mobile Repeaters?
This is an example of precisely why I utilize medium-gain repeater antennas over their high-gain cousins. In mobile FM service, the user will not see the difference. I save money, they are easier to install, don't have as much wind loading, hold up better mechanically, take up less tower real estate, fill in coverage better in the valleys and cause less swishing (signal fade) when the wind is blowing them all over the place. Yet the mentality seems to be I've got to run the highest gain antenna I can get and pump the most power into it as possible. Years ago an FM broadcast station near here had their 5KW transmitter go down. They quickly bypassed the PA and ran 10 watts. Grocery stores in a 40-mile radius subscribed to their SCA store music. Not one of them experienced a problem - no complaints at all. That's my story, and I'm sticking to it ;-) Chuck WB2EDV - Original Message - From: Neil McKie [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, December 31, 2004 12:14 PM Subject: Re: [Repeater-Builder] Mobile Repeaters? Larry, I agree with you on the coverage issue. My 2 meter repeater very near you, the PA deck quit several years ago. Ran the repeater on the 400 mw output exciter until we got the PA deck fixed. Like you, by the time the RF got to the antenna, I'd be surprised if there was more than 100 mw. The users apparently never noticed the difference in power output or they never said anything about it. 73, Neil - WA6KLA [EMAIL PROTECTED] wrote: I have a 2-Watt MICOR UHF Ham Repeater (came from the factory in the 2-watt version) in service locally. The coverage is excellent. I've cooked a few 2-Meter PA decks over the years, and had to jumper around the PA deck to use just the 400 milliwatt exciter as the transmitter, while the PA deck was getting fixed. By the time it went through the three transmit cans of a 6-cavity duplexer, another pass can, all the jumpers, several hundred feet of old feedline, etc., I'd bet that there wasn't 100 milliwatts of power actually reaching the antenna. The coverage was excellent, only the people using mobile and portables behind some hills that were completely blocked seemed to notice that the Repeater wasn't up to its usual strong signal. This is on a very small hill, not some high mountaintop. If you have 10-20 watts for your repeater, you'll probably be surprised how well it works. LJ 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] Mobile Repeaters?
I have to agree with these guys, I have run on the tripler output on my Micor UHF repeater while making PA repairs. The tripler outputs something like 2 watts and I probably had less than 1 watt at the antenna. The last time I had PA trouble I left it that way for a few months because after not noticing much difference in coverage, I was not in much of a hurry to fix it. Wade - KR7K Larry, I agree with you on the coverage issue. My 2 meter repeater very near you, the PA deck quit several years ago. Ran the repeater on the 400 mw output exciter until we got the PA deck fixed. Like you, by the time the RF got to the antenna, I'd be surprised if there was more than 100 mw. The users apparently never noticed the difference in power output or they never said anything about it. 73, Neil - WA6KLA [EMAIL PROTECTED] wrote: I have a 2-Watt MICOR UHF Ham Repeater (came from the factory in the 2-watt version) in service locally. The coverage is excellent. I've cooked a few 2-Meter PA decks over the years, and had to jumper around the PA deck to use just the 400 milliwatt exciter as the transmitter, while the PA deck was getting fixed. By the time it went through the three transmit cans of a 6-cavity duplexer, another pass can, all the jumpers, several hundred feet of old feedline, etc., I'd bet that there wasn't 100 milliwatts of power actually reaching the antenna. The coverage was excellent, only the people using mobile and portables behind some hills that were completely blocked seemed to notice that the Repeater wasn't up to its usual strong signal. This is on a very small hill, not some high mountaintop. If you have 10-20 watts for your repeater, you'll probably be surprised how well it works. LJ Original Message: - From: Dakota Summerhawk [EMAIL PROTECTED] Date: Thu, 30 Dec 2004 21:44:24 -0700 To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Mobile Repeaters? Portables are great but I need the 35W (UHF) and the 50W (VHF) out to assure that the coverage is adequate. Thanks for the suggestion. Dakota -Original Message- From: mch [mailto:[EMAIL PROTECTED] Sent: Thursday, December 30, 2004 8:13 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mobile Repeaters? Use portables... Joe M. Dakota Summerhawk wrote: Is the best way to have a mobile repeater up and running with two mobile radios and a duplexer? Looking for a way to be able to run a couple of repeaters, one VHF, one UHF for a mobile communications van. Can anyone recommend ways to cut down on weight and space? Thanks Dakota - 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: Mobile Repeaters?
I went and checked for MVP's in closed eBay auctions and found none at all. I check periodically and find them selling for $75-$150 for the UHF ones. VHF high and VHF low are usually much cheaper. Plus shipping, which typically runs another $15-$20. Chuck WB2EDV - Original Message - From: Laryn Lohman [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, December 31, 2004 11:07 AM Subject: [Repeater-Builder] Re: Mobile Repeaters? Chuck, it must be my raw, unmitigated bidding skill on Ebay. kidding here Actually I guess like you say, a little luck. Have a good New Year, Chuck. Laryn K8TVZ 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: Mobile Repeaters?
That's typically what I sell them for. I'm about out of UHF ones, but do have a few VHF ones that I was planning to list there. LJ Original Message: - From: Chuck Kelsey [EMAIL PROTECTED] Date: Fri, 31 Dec 2004 11:19:28 -0500 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Mobile Repeaters? I went and checked for MVP's in closed eBay auctions and found none at all. I check periodically and find them selling for $75-$150 for the UHF ones. VHF high and VHF low are usually much cheaper. Plus shipping, which typically runs another $15-$20. Chuck WB2EDV - Original Message - From: Laryn Lohman [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, December 31, 2004 11:07 AM Subject: [Repeater-Builder] Re: Mobile Repeaters? Chuck, it must be my raw, unmitigated bidding skill on Ebay. kidding here Actually I guess like you say, a little luck. Have a good New Year, Chuck. Laryn K8TVZ Yahoo! Groups Links mail2web - Check your email from the web at http://mail2web.com/ . 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: Outlet for RG214/U
I checked a few sources - BOR (Bust-Out Retail) real Belden Silver Plated RG214 *is* about $5.50 a foot. Others, like Coleman, are allot less. Standard (nickle plate) RG214 was in Tessco's Outlet at $0.89 a foot. So if making jumpers, not going hundreds of feet, nickle plated would do fine for me. (BTW - half-inch hardline, like the venerable Andrews LDF4-50, is about $2-$3 a foot if you shop.) The whole reason for using RG-214 or similar cables in a repeater installation is for their low-noise and high-shielding properties, not loss characteristics. You lose the low-noise part when you go with the commercial RG-214 which has a copper or tinned copper braid. In reality, if you wander hamfests and Ebay, you can find real RG-214/U as well as 1/4, 3/8, and 1/2 Superflex for a whole lot less. 1/2 Superflex, in particular, seems be particularly plentiful, and cheap. The connectors are usually around $5 on Ebay which is comparable to high-quality silver/teflon type N's for RG-214. As far as regular Heliax, I usually pay around $1.25 a foot for LDF4-50A new, and sometimes under $1.00 if it's part of a bigger order. I usually buy from Tessco or Harris. If you're looking for 1/2 LDF, go on Ebay and search for a user named valuesurplus. Last time I talked to him he had several thousand feet of new 1/2 and he was selling it for under $1/ft in small quantities, less for longer lengths. --- Jeff -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.7 - Release Date: 12/30/2004 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: Speaker Level Mixing
Once upon a time you could buy 6 X 9 speakers with two voice coils, each 8 ohms or so. Haven't seen one for years, but they may still be out there somewhere. Used to use one for just what you are wanting to do, run two rigs into one speaker. 73, Al, K9SI 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: Speaker Level Mixing
On Fri, 31 Dec 2004 15:02:43 -0600, Al Wolfe wrote: Once upon a time you could buy 6 X 9 speakers with two voice coils, Just make sure your radios filter out the PL! I can just imagine what a 100Hz tone would sound like through a 6x9 :) Tedd Doda, VE3TJD Lazer Audio and Electronics Baden, Ontario, Canada 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: Mobile Repeaters?
[EMAIL PROTECTED] wrote: Anyone who can't afford something like that should think seriously about whether or not they want to be in the business of being a repeater owner. LJ A lot of truth to that statement. [wondering why I own 20 repeaters.] (I know, I want to be poor the rest of my lifeyea that's it!) (grin) Kevin Custer 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] Portable Repeater - A Case History
I recently built a portable 2m repeater that is about the size of a bowling bag and weighs about the same. It is built into an SKB carrying case that is rugged, dripproof, and good-looking. The secret of getting a full-duplex radio and the duplexer into a box measuring about one cubic foot in volume is choosing the right components and using a widespread pair. As a resident of Central California, my area is under the jurisdiction of the Two-Meter Area Spectrum Management Association, otherwise known as TASMA. This coordinating body wisely authorized a widespread frequency pair, exclusively for portable repeater application, to be used only for temporary and emergency situations. The frequencies are 147.585 MHz input and 144.930 MHz output. This is a split of 2.655 MHz, which is just within the capability of a compact base station duplexer. I chose an RFS/Celwave 5085-1 duplexer, which works perfectly in this application. The 5085-1 duplexer is about 8.5 inches wide, 12 inches long, and just under 2 inches thick- about 30% larger in all dimensions than the common notch-type mobile duplexer. It comprises six helical resonators in a notch-only configuration. Its insertion loss at RX is 1.1 dB, and at TX is 1.4 dB. The notch depth at RX is 92.5 dB and at TX is 79.4 dB. These are very good numbers, better than what is needed for zero desense in this application, and are roughly equivalent to four 8 inch standard cavities at a 600 kHz split. The transceiver is a Motorola R1225, a programmable full-duplex radio that includes both TPL and DPL capability, a built-in repeater controller, polite Morse ID, courtesy beep, PA protection, etc. This radio is what is inside a GR1225 repeater, and is available in either a 1-10 watt or a 25-50 watt model for VHF, and in 1-10 watt and 25-45 watt versions for UHF. All versions will program into the Amateur bands without modification. I am using the 10 watt model, since my ARES group will use this repeater primarily for communication within a relatively short radius. The model number is M03GRC90C2AA. With a 5 MHz split at either VHF or UHF, a similar portable repeater could probably use a common mobile duplexer. 73, Eric Lemmon WB6FLY Dakota Summerhawk wrote: Is the best way to have a mobile repeater up and running with two mobile radios and a duplexer? Looking for a way to be able to run a couple of repeaters, one VHF and one UHF, for a mobile communications van. Can anyone recommend ways to cut down on weight and space? 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: Speaker Level Mixing
At 01:44 PM 12/31/04, you wrote: On Fri, 31 Dec 2004 15:02:43 -0600, Al Wolfe wrote: Once upon a time you could buy 6 X 9 speakers with two voice coils, Just make sure your radios filter out the PL! True! I can just imagine what a 100Hz tone would sound like through a 6x9 :) Probably just as annoying as being having an Accura with dual 500w subwoofer amps in the right lane, you in the center lane with your left window open, and hear and watch the rear license plate on the '67 El Camino in lane #1 rattle in step with the base notes.. And no, I'm not kidding. If it's too loud, you're too old seems to be the mantra of the day. Me, I just want to preserve my ears so I can hear my grandchildren. Mike WA6ILQ 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/
