[Repeater-Builder] Need tips for repeater performance
Hello everybody: I'm into increasing the performance of my repeater. I've already ordered 50 Ft. of LMR-400 to replace the cheap RG-8. Yet, I wonder if there is something else I could do. The Duplexer is pre tuned to my freq. (458.0 repeater RX / 453.0 repeater TX). The duplexer is connected to the radios (my repeater is built out of two Motorola M120's) using RG-58 jumpers of about 24 inches long. Could that be affecting performance? When I check the TX power thru the duplexer I'm getting about 10W yet the TX radio is programmed for 30W. I know that I'll loose some power with the duplexer, but seems to me that I'm loosing too much. SWR won't go below 2.1 no matter how much I adjust the antenna bays. So, what could be done? I imagine that swapping the RG-8 for the LMR-400 will help but I still wonder if that would be enough. Any help will be greatly appreciated. Aisen
Re: [Repeater-Builder] Need tips for repeater performance
Using LMR400 will cause you problems in duplex service - use Heliax instead. Chuck WB2EDV - Original Message - From: Aisen Lopez To: repeater-builder@yahoogroups.com Sent: Wednesday, June 17, 2009 8:41 PM Subject: [Repeater-Builder] Need tips for repeater performance Hello everybody: I'm into increasing the performance of my repeater. I've already ordered 50 Ft. of LMR-400 to replace the cheap RG-8. Yet, I wonder if there is something else I could do. The Duplexer is pre tuned to my freq. (458.0 repeater RX / 453.0 repeater TX). The duplexer is connected to the radios (my repeater is built out of two Motorola M120's) using RG-58 jumpers of about 24 inches long. Could that be affecting performance? When I check the TX power thru the duplexer I'm getting about 10W yet the TX radio is programmed for 30W. I know that I'll loose some power with the duplexer, but seems to me that I'm loosing too much. SWR won't go below 2.1 no matter how much I adjust the antenna bays. So, what could be done? I imagine that swapping the RG-8 for the LMR-400 will help but I still wonder if that would be enough. Any help will be greatly appreciated. Aisen
Re: [Repeater-Builder] Need tips for repeater performance
And the RG-58 jumpers should be changed to RG-400 or RG-142 (not LMR400, that's totally a different beast). Chuck WB2EDV - Original Message - From: Chuck Kelsey wb2...@roadrunner.com To: Repeater-Builder@yahoogroups.com Sent: Wednesday, June 17, 2009 8:46 PM Subject: Re: [Repeater-Builder] Need tips for repeater performance Using LMR400 will cause you problems in duplex service - use Heliax instead. Chuck WB2EDV - Original Message - From: Aisen Lopez To: repeater-builder@yahoogroups.com Sent: Wednesday, June 17, 2009 8:41 PM Subject: [Repeater-Builder] Need tips for repeater performance Hello everybody: I'm into increasing the performance of my repeater. I've already ordered 50 Ft. of LMR-400 to replace the cheap RG-8. Yet, I wonder if there is something else I could do. The Duplexer is pre tuned to my freq. (458.0 repeater RX / 453.0 repeater TX). The duplexer is connected to the radios (my repeater is built out of two Motorola M120's) using RG-58 jumpers of about 24 inches long. Could that be affecting performance? When I check the TX power thru the duplexer I'm getting about 10W yet the TX radio is programmed for 30W. I know that I'll loose some power with the duplexer, but seems to me that I'm loosing too much. SWR won't go below 2.1 no matter how much I adjust the antenna bays. So, what could be done? I imagine that swapping the RG-8 for the LMR-400 will help but I still wonder if that would be enough. Any help will be greatly appreciated. Aisen Yahoo! Groups Links
Re: [Repeater-Builder] Need tips for repeater performance
At 07:41 PM 6/17/2009, you wrote: I'm into increasing the performance of my repeater. I've already ordered 50 Ft. of LMR-400 to replace the cheap RG-8. Yet, I wonder if there is something else I could do. Oh good lord ... I can hear the rifles being loaded and locked right now ... Everybody duck! Larry Wagoner - N5WLW VP - PRCARC PIC - MS SECT ARRL
Re: [Repeater-Builder] Need tips for repeater performance
BATTLE STATIONS!! RED ALERT!! We got LMR-400 here! - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: repeater-builder@yahoogroups.com repeater-builder@yahoogroups.com Sent: Wed Jun 17 19:41:18 2009 Subject: [Repeater-Builder] Need tips for repeater performance Hello everybody: I'm into increasing the performance of my repeater. I've already ordered 50 Ft. of LMR-400 to replace the cheap RG-8. Yet, I wonder if there is something else I could do. The Duplexer is pre tuned to my freq. (458.0 repeater RX / 453.0 repeater TX). The duplexer is connected to the radios (my repeater is built out of two Motorola M120's) using RG-58 jumpers of about 24 inches long. Could that be affecting performance? When I check the TX power thru the duplexer I'm getting about 10W yet the TX radio is programmed for 30W. I know that I'll loose some power with the duplexer, but seems to me that I'm loosing too much. SWR won't go below 2.1 no matter how much I adjust the antenna bays. So, what could be done? I imagine that swapping the RG-8 for the LMR-400 will help but I still wonder if that would be enough. Any help will be greatly appreciated. Aisen
Re: [Repeater-Builder] Need tips for repeater performance
At 05:50 PM 6/17/2009, Larry Wagoner wrote: At 07:41 PM 6/17/2009, you wrote: I'm into increasing the performance of my repeater. I've already ordered 50 Ft. of LMR-400 to replace the cheap RG-8. Yet, I wonder if there is something else I could do. Oh good lord ... I can hear the rifles being loaded and locked right now ... Everyone had to start at the beginning too :-) Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net We don't just make 'em. We use 'em!
RE: [Repeater-Builder] Need tips for repeater performance
That's true Ken! I used 9913 non flex in my first repeater system. It was single site/split antenna, but still. =] Chris Kb0wlf -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of Ken Arck Sent: Wednesday, June 17, 2009 8:01 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Need tips for repeater performance At 05:50 PM 6/17/2009, Larry Wagoner wrote: At 07:41 PM 6/17/2009, you wrote: I'm into increasing the performance of my repeater. I've already ordered 50 Ft. of LMR-400 to replace the cheap RG-8. Yet, I wonder if there is something else I could do. Oh good lord ... I can hear the rifles being loaded and locked right now ... Everyone had to start at the beginning too :-) Ken --- --- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net We don't just make 'em. We use 'em! Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.339 / Virus Database: 270.12.73/2180 - Release Date: 06/17/09 05:53:00
Re: [Repeater-Builder] Need tips for repeater performance
Without testing with proper test gear, it's really impossible to say. -- Nate Duehr Sent from my iPhone On Jun 17, 2009, at 18:41, Aisen Lopez aisendwi...@yahoo.com wrote: Hello everybody: I'm into increasing the performance of my repeater. I've already ordered 50 Ft. of LMR-400 to replace the cheap RG-8. Yet, I wonder if there is something else I could do. The Duplexer is pre tuned to my freq. (458.0 repeater RX / 453.0 repeater TX). The duplexer is connected to the radios (my repeater is built out of two Motorola M120's) using RG-58 jumpers of about 24 inches long. Could that be affecting performance? When I check the TX power thru the duplexer I'm getting about 10W yet the TX radio is programmed for 30W. I know that I'll loose some power with the duplexer, but seems to me that I'm loosing too much. SWR won't go below 2.1 no matter how much I adjust the antenna bays. So, what could be done? I imagine that swapping the RG-8 for the LMR-400 will help but I still wonder if that would be enough. Any help will be greatly appreciated. Aisen
