[Repeater-Builder] Mobile Repeater
I was asked by a Technical Rescue group to help them set up a repeater for a mobile command post they are building. The chassis is MCI bus, so it's not going off road. Here's the notes: * The are licensed in commercial UHF. * The bus has both 12V and 24V available from 2 different battery sets * The have access to a commercial style rack with shock mounts * Their hand-held radios are all HT1250, multiple varients. Some of the members have opted to install Motorola Spectra radios in their POV. * The have access to an MTR2000 station and a Kenwood TKR850 from a local car dealership. The can pick either, the other goes to another non-profit. * The antenna is an looks like an RFS BA1012 on a 20' push up pole (they are attempting to obtain a 60' Wilburt mast from a television station) I'm leaning toward the MTR2000 as has better specs and it a high power unit (will not require an external PA). Is there something I am missing in pointing them at the MTR station? Martin
Re: [Repeater-Builder] Mobile Repeater
The first problem that comes to mind with usin the MTR2K is that in that environment youdon't need the HIGH Power of that unit. 1) You're not ging to be covering that far from a command post. 2) The high power will trash or desense everything else in that band and maybe other radios in close proximity to it. 3) I believe a lot of people have commented the the repeater does weird things or is unstable if the power is turned way down on it. 4) At that height your receive range is not going to be that great so you don't need a big transmitter. With so many radios and antennas in close proximity to each other in a command post and all possibly operating at the same time, your main consideration is interference. Just my 2c worth, Mike Dietrich KB5FLX Specialized Communicatoins - Original Message - From: rahwayflynn To: Repeater-Builder@yahoogroups.com Sent: Saturday, March 21, 2009 10:18 AM Subject: [Repeater-Builder] Mobile Repeater I was asked by a Technical Rescue group to help them set up a repeater for a mobile command post they are building. The chassis is MCI bus, so it's not going off road. Here's the notes: * The are licensed in commercial UHF. * The bus has both 12V and 24V available from 2 different battery sets * The have access to a commercial style rack with shock mounts * Their hand-held radios are all HT1250, multiple varients. Some of the members have opted to install Motorola Spectra radios in their POV. * The have access to an MTR2000 station and a Kenwood TKR850 from a local car dealership. The can pick either, the other goes to another non-profit. * The antenna is an looks like an RFS BA1012 on a 20' push up pole (they are attempting to obtain a 60' Wilburt mast from a television station) I'm leaning toward the MTR2000 as has better specs and it a high power unit (will not require an external PA). Is there something I am missing in pointing them at the MTR station? Martin
Re: [Repeater-Builder] Mobile Repeater
Sorry for the mis-spelled words in the reply email, stupid keyboard acting up. have a great day all, Mike
Re: [Repeater-Builder] Mobile Repeater
Go with the MTR2000. Let's assume that the MTR is a 100 watt radio. I have been runing a MTR at 50% power for the last several years. No problems at all. WIth the duplexer loss and running at half power, you will have less than 50 watts which will work fine in your command post setting. Set it and forget it. Polite legal ID included with the internal controller. The handhelds are HT1250 they could have the non-standard reverse burst function set to eliminate the squelch crash that would occur with the Kenwood, but the Spectra's would not have that capability. Milt N3LTQ - Original Message - From: rahwayflynn mafl...@att.net To: Repeater-Builder@yahoogroups.com Sent: Saturday, March 21, 2009 11:18 AM Subject: [Repeater-Builder] Mobile Repeater I was asked by a Technical Rescue group to help them set up a repeater for a mobile command post they are building. The chassis is MCI bus, so it's not going off road. Here's the notes: * The are licensed in commercial UHF. * The bus has both 12V and 24V available from 2 different battery sets * The have access to a commercial style rack with shock mounts * Their hand-held radios are all HT1250, multiple varients. Some of the members have opted to install Motorola Spectra radios in their POV. * The have access to an MTR2000 station and a Kenwood TKR850 from a local car dealership. The can pick either, the other goes to another non-profit. * The antenna is an looks like an RFS BA1012 on a 20' push up pole (they are attempting to obtain a 60' Wilburt mast from a television station) I'm leaning toward the MTR2000 as has better specs and it a high power unit (will not require an external PA). Is there something I am missing in pointing them at the MTR station? Martin Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.278 / Virus Database: 270.11.22/2015 - Release Date: 03/20/09 19:01:00
RE: [Repeater-Builder] Mobile Repeater
Martin, Definitely go for the MTR2000. I assume that the unit is the high-power model, identified with fans on each side. It operates on 28 VDC, but can be set for 50 watts output. If it does not have fans, it is probably a 40 watt station that operates on 14 VDC. The primary reason I recommend the MTR2000 over the TKR850 is because the MTR has a reverse burst that is universal with all Motorola products- which you have stated is what the users already have. If you chose the TKR850, neither the repeater nor the user radios would mute quietly. Squelch crashes become very annoying real fast. I now have six MTR2000 repeaters in service, and I have set up a TKR850 for a ham club, so I am quite familiar with their pluses and minuses. A low-tier repeater like the TKR850 has no place in a Public Safety radio system. Kenwood does make the TKR840, which is a very good unit that is in service with many Public Safety agencies in Central California, but it does require a power amplifier. A TKR840 with a TPL PA is hard to beat for durability. Needless to say, the TKR850 and the TKR840 are light years apart in quality and performance. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of rahwayflynn Sent: Saturday, March 21, 2009 8:19 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mobile Repeater I was asked by a Technical Rescue group to help them set up a repeater for a mobile command post they are building. The chassis is MCI bus, so it's not going off road. Here's the notes: * The are licensed in commercial UHF. * The bus has both 12V and 24V available from 2 different battery sets * The have access to a commercial style rack with shock mounts * Their hand-held radios are all HT1250, multiple varients. Some of the members have opted to install Motorola Spectra radios in their POV. * The have access to an MTR2000 station and a Kenwood TKR850 from a local car dealership. The can pick either, the other goes to another non-profit. * The antenna is an looks like an RFS BA1012 on a 20' push up pole (they are attempting to obtain a 60' Wilburt mast from a television station) I'm leaning toward the MTR2000 as has better specs and it a high power unit (will not require an external PA). Is there something I am missing in pointing them at the MTR station? Martin
[Repeater-Builder] mobile repeater setup
I drive a truck OTR and at times work with FEMA. Would it be possible to put together a mobile repeater system that could be used in areas without power? I have a generator system in my truck so I have 110 power available. My interest would be in something semi permanently installed without need for putting antennas up or down. I realize it would have a rather limited reach but would theoretically allow an ht user 5 miles east of the truck to talk to an ht user 5 miles west of the truck when they wouldn't be able to talk simplex. With mobiles the effective radius presumably would be greater as well. My questions are is this feasible and reasonable? What would be the least expensive system I could put together to do this job? Thanks in advance for all suggestions. 73 Leo K5LDB
Re: [Repeater-Builder] mobile repeater setup
Leo: Look around for a used Motorola GR300 repeater. They have a footprint of about one square foot and about 14 high and are quite reliable. I have a couple of them running in the 70 cm ham band. They usually come with a 120 VSAC power supply, but they run off of 13.8 VDC, so you can bypass the supply and run them directly from yoiur rig's DC source. I set mine for 20 W XMT power to keep a limit on final amp heat. They'll fit neatly into a small space in the sleeper area with room to spare. They include a built-in duplexer (UHF). There might be some on the Bay. Also, I have a Moto UHF suitcase repeater that includes a duplexer. 73, Dick W1NMZ - Original Message - From: texasexpediter To: Repeater-Builder@yahoogroups.com Sent: 04 February, 2007 15:16 Subject: [Repeater-Builder] mobile repeater setup I drive a truck OTR and at times work with FEMA. Would it be possible to put together a mobile repeater system that could be used in areas without power? I have a generator system in my truck so I have 110 power available. My interest would be in something semi permanently installed without need for putting antennas up or down. I realize it would have a rather limited reach but would theoretically allow an ht user 5 miles east of the truck to talk to an ht user 5 miles west of the truck when they wouldn't be able to talk simplex. With mobiles the effective radius presumably would be greater as well. My questions are is this feasible and reasonable? What would be the least expensive system I could put together to do this job? Thanks in advance for all suggestions. 73 Leo K5LDB
RE: [Repeater-Builder] mobile repeater setup
Yes, it's easy to do. I have one 440. You don't need 110v, 12v works just fine. Check out this site. http://www.nhrc.net/nhrc-4mvp/ Fred N4GER -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of texasexpediter Sent: Sunday, February 04, 2007 5:17 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] mobile repeater setup I drive a truck OTR and at times work with FEMA. Would it be possible to put together a mobile repeater system that could be used in areas without power? I have a generator system in my truck so I have 110 power available. My interest would be in something semi permanently installed without need for putting antennas up or down. I realize it would have a rather limited reach but would theoretically allow an ht user 5 miles east of the truck to talk to an ht user 5 miles west of the truck when they wouldn't be able to talk simplex. With mobiles the effective radius presumably would be greater as well. My questions are is this feasible and reasonable? What would be the least expensive system I could put together to do this job? Thanks in advance for all suggestions. 73 Leo K5LDB Yahoo! Groups Links
Re: [Repeater-Builder] mobile repeater setup
If your going to use two mobiles as a repeater (such as the GM300 series, or any other mid powered mobile radios) you must consider these radios are not meant for heavy / continuous duty use. If you are going to have moderate traffic, 20W is fine (with a fan). If your going to have heavy traffic, I'd turn the power down to no more than 12 watts and add a nice heavy muffin fan. I work as a two way radio technician and have seen my share of toasted Mobile PA's. Paul Metzger KQ6EH --- On Feb 4, 2007, at 15:16, texasexpediter wrote: I drive a truck OTR and at times work with FEMA. Would it be possible to put together a mobile repeater system that could be used in areas without power? I have a generator system in my truck so I have 110 power available. My interest would be in something semi permanently installed without need for putting antennas up or down. I realize it would have a rather limited reach but would theoretically allow an ht user 5 miles east of the truck to talk to an ht user 5 miles west of the truck when they wouldn't be able to talk simplex. With mobiles the effective radius presumably would be greater as well. My questions are is this feasible and reasonable? What would be the least expensive system I could put together to do this job? Thanks in advance for all suggestions. 73 Leo K5LDB
Re: [Repeater-Builder] mobile repeater setup
On 2/5/07, Dick [EMAIL PROTECTED] wrote: Look around for a used Motorola GR300 repeater. They have a footprint of about one square foot and about 14 high and are quite reliable. A friend has a GR1225 which is Moto's tiny little single radio solution for this type of thing also. Works well. Nate WY0X
Re: [Repeater-Builder] mobile repeater
If You Want I have A unit out of A WV State Police Car With UHF To Low Band VHF With Cables to Interconnect Would Might be able to use High Band radio in place of Low Band I think they are Micor DaleN8SAC - Original Message - From: ctool1968 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Wednesday, November 16, 2005 8:48 PM Subject: [Repeater-Builder] mobile repeater it sounds like the type of thing I want is not really possible,cause I want the repeater to be in my truck and multi channel,but it dont sound like that is reasonable,thanks for all the suggestions 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] mobile repeater
it sounds like the type of thing I want is not really possible,cause I want the repeater to be in my truck and multi channel,but it dont sound like that is reasonable,thanks for all the suggestions 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 repeater
are you going to use it for HAM or business channels? - Original Message - From: ctool1968 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Wednesday, November 16, 2005 8:48 PM Subject: [Repeater-Builder] mobile repeater it sounds like the type of thing I want is not really possible,cause I want the repeater to be in my truck and multi channel,but it dont sound like that is reasonable,thanks for all the suggestions 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] Mobile Repeater
Hello, Many years ago I built crossband radio setup going from a simplex PPL 6060 to a EF Johnson 800 MHz trunk radio. The simplex PPL 6060 was not good enough so I built a full duplex mobile repeater out of another EF Johnson PPL 6060 on one of the old splinter channels. I had a 16 function Touch Tone decoder controlling a E F Johnson 800 MHz trunking radio in my truck that also carried two batteries. I had a Phelps Dodge, Cellwave whatever 4 cavity mobile duplexer feeding a antenna mounted under the truck which most of the time gave me good enough coverage to go inside large building without a lot of dead spots. If I needed more coverage I just stuck a mag mount antenna on top of the truck, along side the other 5 antennas grin. I could change systems or groups, go to the phone patch, turn the trunk radio off or inhibit the transmitter so I could use the repeater locally without bothering the office. I still have the PPL 6060 that's now on a Ham repeater frequency with the Touch Tone controller but the trunk system has gone the way of NEXTEL unfortunately! It was fun to build and use! Who cares if it was legal or not, besides they can't get me now, the statute of limitations is past now! Actually we had licenses on all frequencies and the FCC did not care what you did with the splinter channels at the time, or so the lawyer said! Paul WB5IDM 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/
