[Repeater-Builder] Re: isolator
Bob, Yes, I looked for better than hour and did find some good info. I am sure not all for it seems hard to locate some items after having to read thru tons of titles, but then again one learns about other things, hi. 73, ron, n9ee/r ps Thanks to all who replied with real information. --- In Repeater-Builder@yahoogroups.com, Bob M. [EMAIL PROTECTED] wrote: Have you checked the web site that accompanies this Yahoo! Group? Bob M. == --- On Wed, 11/12/08, Ron Wright [EMAIL PROTECTED] wrote: From: Ron Wright [EMAIL PROTECTED] Subject: [Repeater-Builder] isolator To: Repeater-Builder@yahoogroups.com Date: Wednesday, November 12, 2008, 11:01 PM Hi all, I have aquired a EMR Isolator, model 7450/4 for 150-170 Mhz and tuned to 155 MHz. It has 3 tuning adjustments so need to retune it. Can anyone give info as to how to tune it or where I can get info. EMR has good info on what it does and how it works, but found nothing at their site on tuning. Tune for low SWR, max power out, min smoke, etc??? 73, ron, n9ee/r
Re: [Repeater-Builder] isolator
Have you checked the web site that accompanies this Yahoo! Group? Bob M. == --- On Wed, 11/12/08, Ron Wright [EMAIL PROTECTED] wrote: From: Ron Wright [EMAIL PROTECTED] Subject: [Repeater-Builder] isolator To: Repeater-Builder@yahoogroups.com Date: Wednesday, November 12, 2008, 11:01 PM Hi all, I have aquired a EMR Isolator, model 7450/4 for 150-170 Mhz and tuned to 155 MHz. It has 3 tuning adjustments so need to retune it. Can anyone give info as to how to tune it or where I can get info. EMR has good info on what it does and how it works, but found nothing at their site on tuning. Tune for low SWR, max power out, min smoke, etc??? 73, ron, n9ee/r
[Repeater-Builder] Icom repeater
Have a new in box Icom Fr-4000 repeater for sale. $1145.00 also covers shipping to the 48 states. Florida sales must add sales tax. also a number of Micor repeaters for sale all UHF was used 460 to 470 band 12 to 75 watt units. Some working units some for parts. thanks John 1-888-708-0709
RE: [Repeater-Builder] isolator
At 11/12/2008 20:20, you wrote: Ron, Contact EMR and request a copy of the bulletin, Field Tuning of Isolators. Be aware that typical circulators and isolators can be field-tuned perhaps +/- 2% from the frequency for which they were made. If you want to use it at a new frequency that is more than 3 or 4 MHz away, it probably will need to be remanufactured at about 1/3 to 1/2 the cost of a new unit. This is incorrect. If it was, then virtually all surplus VHF isolators would be unusable at 2 meters. My collection of isolators I've acquired at swap meets over the years that have been retuned work just fine at 2 meters is proof that they do in fact move further than 3 or 4 MHz away. You should use a vector network analyzer, or at least a spectrum analyzer with tracking generator and a return-loss bridge, to properly tune a circulator or isolator. Not necessary. I use a transmitter power meter, first apply power in the forward direction through the isolator tune the adjustments near the input output ports (1 2) for max. power. Then reverse the input output connections tune the adjustment near the reject load (3) for minimum power. Repeat the procedure a 2nd time. You should get anywhere from 20 to 30 dB of isolation, depending on how good the load on port 3 is. BTW, this is probably why you almost never see an isolator with SO239 connectors, even at VHF HB. Bob NO6B
Re: [Repeater-Builder] Icom repeater
John, How much for a part of of one of your scrap Micor. I'm looking for the metal L shaped bracket that secoure the PL decoder board to the rear of the unified chasis. Don't need the PL bd. , just the bracket and screws. -- Doug N3DAB/WPRX486/WPJL709 Maire-Radios [EMAIL PROTECTED] wrote: = Have a new in box Icom Fr-4000 repeater for sale. $1145.00 also covers shipping to the 48 states. Florida sales must add sales tax. also a number of Micor repeaters for sale all UHF was used 460 to 470 band 12 to 75 watt units. Some working units some for parts. thanks John 1-888-708-0709
Re: [Repeater-Builder] Icom repeater
let me go look at one thanks John - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Cc: Maire-Radios Sent: Thursday, November 13, 2008 10:09 AM Subject: Re: [Repeater-Builder] Icom repeater John, How much for a part of of one of your scrap Micor. I'm looking for the metal L shaped bracket that secoure the PL decoder board to the rear of the unified chasis. Don't need the PL bd. , just the bracket and screws. -- Doug N3DAB/WPRX486/WPJL709 Maire-Radios [EMAIL PROTECTED] wrote: = Have a new in box Icom Fr-4000 repeater for sale. $1145.00 also covers shipping to the 48 states. Florida sales must add sales tax. also a number of Micor repeaters for sale all UHF was used 460 to 470 band 12 to 75 watt units. Some working units some for parts. thanks John 1-888-708-0709
Re: [Repeater-Builder] Icom repeater
Roger, standing by! -- Doug N3DAB/WPRX486/WPJL709 Maire-Radios [EMAIL PROTECTED] wrote: = let me go look at one thanks John - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Cc: Maire-Radios Sent: Thursday, November 13, 2008 10:09 AM Subject: Re: [Repeater-Builder] Icom repeater John, How much for a part of of one of your scrap Micor. I'm looking for the metal L shaped bracket that secoure the PL decoder board to the rear of the unified chasis. Don't need the PL bd. , just the bracket and screws. -- Doug N3DAB/WPRX486/WPJL709 Maire-Radios [EMAIL PROTECTED] wrote: = Have a new in box Icom Fr-4000 repeater for sale. $1145.00 also covers shipping to the 48 states. Florida sales must add sales tax. also a number of Micor repeaters for sale all UHF was used 460 to 470 band 12 to 75 watt units. Some working units some for parts. thanks John 1-888-708-0709
Re: [Repeater-Builder] Fw: Motorola P-100 radio's
Maire-Radios wrote: ** *Sent:* Thursday, November 13, 2008 8:01 PM *Subject:* Motorola P-100 radio's *Have a bin of Motorola P-100 2 channel and some 6 channel UHF 460 to 470 band and a number of chargers.* Hw big is the bin? How many radios are we talking about? Mike
[Repeater-Builder] Anyone have experience with RF Technology Pty Ltd. repeater gear?
Hi Group, The shop I work at was recently given a couple of decommissioned LTR repeaters after the customer moved to a different radio format. The stations are made by RF Technology Pty Ltd. out of Australia, and consist of a 19 card cage containing a T500B Transmitter, R500B Receiver and PA500B Power Amplifier, as well as a power supply. On the back is an alarm trunking interface card that was connected to an LTR controller. In my readings, I've discovered these are 450-490MHz stations that will supposedly produce 50W 100% of the time. Anyone have any experience with this gear? I'm wondering if I should buy one or two from the company and turn them in to 440MHz machines. Does anyone know if they will tune down to the UHF amateur band? Do they have internal PL encode/decode, or must I use an outboard encoder/decoder? Whats the performance like? Duty cycle? Any hints or kinks on these units? It appears to me that DX Radio relabels these units and resells them, or RF Technology is relabeling DX Radio gear, as the hardware is physically identical. I base this on what I've seen on the web, I have no experience with either product. Thanks for the heads up. -Chris/KF6AJM
RE: [Repeater-Builder] Anyone have experience with RF Technology Pty Ltd. repeater gear?
Chris, The units your looking at are a great set of repeaters. You can call Ron Tilley at RF Technologies but keep in mind they are way ahead of us. You will want to call them around 8PM in the evening. I believe they will work in the ham band. Mike K7PFJ _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of surf_boy82 Sent: Thursday, November 13, 2008 9:37 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Anyone have experience with RF Technology Pty Ltd. repeater gear? Hi Group, The shop I work at was recently given a couple of decommissioned LTR repeaters after the customer moved to a different radio format. The stations are made by RF Technology Pty Ltd. out of Australia, and consist of a 19 card cage containing a T500B Transmitter, R500B Receiver and PA500B Power Amplifier, as well as a power supply. On the back is an alarm trunking interface card that was connected to an LTR controller. In my readings, I've discovered these are 450-490MHz stations that will supposedly produce 50W 100% of the time. Anyone have any experience with this gear? I'm wondering if I should buy one or two from the company and turn them in to 440MHz machines. Does anyone know if they will tune down to the UHF amateur band? Do they have internal PL encode/decode, or must I use an outboard encoder/decoder? Whats the performance like? Duty cycle? Any hints or kinks on these units? It appears to me that DX Radio relabels these units and resells them, or RF Technology is relabeling DX Radio gear, as the hardware is physically identical. I base this on what I've seen on the web, I have no experience with either product. Thanks for the heads up. -Chris/KF6AJM
[Repeater-Builder] Re: Anyone have experience with RF Technology Pty Ltd. repeater gear?
Much obliged, Mike. Glad to hear it. I was able to obtain programming software and cable schematics as well as some documentation from their website, so perhaps tomorrow if time permits I'll see what they can do. Amateur LTR system anyone? Just kidding. Best, Chris/KF6AJM --- In Repeater-Builder@yahoogroups.com, Mike Mullarkey [EMAIL PROTECTED] wrote: Chris, The units your looking at are a great set of repeaters. You can call Ron Tilley at RF Technologies but keep in mind they are way ahead of us. You will want to call them around 8PM in the evening. I believe they will work in the ham band. Mike K7PFJ _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of surf_boy82 Sent: Thursday, November 13, 2008 9:37 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Anyone have experience with RF Technology Pty Ltd. repeater gear? Hi Group, The shop I work at was recently given a couple of decommissioned LTR repeaters after the customer moved to a different radio format. The stations are made by RF Technology Pty Ltd. out of Australia, and consist of a 19 card cage containing a T500B Transmitter, R500B Receiver and PA500B Power Amplifier, as well as a power supply. On the back is an alarm trunking interface card that was connected to an LTR controller. In my readings, I've discovered these are 450-490MHz stations that will supposedly produce 50W 100% of the time. Anyone have any experience with this gear? I'm wondering if I should buy one or two from the company and turn them in to 440MHz machines. Does anyone know if they will tune down to the UHF amateur band? Do they have internal PL encode/decode, or must I use an outboard encoder/decoder? Whats the performance like? Duty cycle? Any hints or kinks on these units? It appears to me that DX Radio relabels these units and resells them, or RF Technology is relabeling DX Radio gear, as the hardware is physically identical. I base this on what I've seen on the web, I have no experience with either product. Thanks for the heads up. -Chris/KF6AJM
Re: [Repeater-Builder] Anyone have experience with RF Technology Pty Ltd. repeater gear?
On 14/11/2008 2:37:18 PM, surf_boy82 ([EMAIL PROTECTED]) wrote: Hi Group, The shop I work at was recently given a couple of decommissioned LTR repeaters after the customer moved to a different radio format. The stations are made by RF Technology Pty Ltd. out of Australia, and consist of a 19 card cage containing a T500B Transmitter, R500B Receiver and PA500B Power Amplifier, as well as a power supply. On the back is an alarm trunking interface card that was connected to an LTR controller. In my readings, I've discovered these a This may help you Chris... http://www.rftechnology.com.au/rf_fsmiles.html I just googled T500B and chose the RF technology link. rgds John VK4JKL
