[Repeater-Builder] Re: Mystery Micor problem
Glenn and Group, You were right on the channel elment being the issue ( placed a kxn 1024 for uhf and right on Rx.) Now i am looking for a KXN 1019 VHF not finding any in boxes or ebay. anyone have one they can spare? Ryan n3ssl --- In Repeater-Builder@yahoogroups.com, Glenn Little WB4UIV glennmaill...@... wrote: If you have another channel element that has a crystal, I would use it to determine if the problem is in the radio or the element. I suspect that the bad capacitor is in the element. What is the part number of the channel element? 73 Glenn WB4UIV At 10:03 PM 8/9/2010, you wrote: Glenn, Is it safe to say look in the channel element for the bad cap ? Tempeture is not a issue with this unit it was in a heated and A/C garage kept about 65-80 degrees with dehumdifer. I am glad the new site is climate controlled also. Ryan n3ssl --- In Repeater-Builder@yahoogroups.com, Glenn Little WB4UIV glennmaillist@ wrote: We had this problem in Johnson radios. What it turned out to be was a plate of a silver mica capacitor coming disconnected internally in the capacitor. This caused the capacitor to shift to a lower capacitance by the amount that the plate contributed to the capacitor. The lower capacitance caused the radio frequency to shift high and outside the tuning range of the netting device. I cannot tell you what capacitor has failed. Check the silver mica capacitors in the tuning circuit and replace the one that is low in value. I also have not been in a Micor element in many years. Hope this helps. This appears to be a somewhat common failure for silver mica capacitor due to the way the capacitor is physically constructed. 73 Glenn WB4UIV At 09:09 PM 8/8/2010, you wrote: Glenn, OZ and group Its a step jump 5 khz up and get - 200 hz of crystal movment. What silver mica Cap is it? I have not looked inside a channel element in years usally send them out and trust the mfg. I also gave the crystal movement a thought but was is a temp controlled enviroment. Ryan --- In Repeater-Builder@yahoogroups.com, Glenn Little WB4UIV glennmaillist@ wrote: Was the shift a drift or a step jump? If a step jump, you probably have a bad silver mica capacitor. 73 Glenn WB4UIV At 04:23 PM 8/8/2010, you wrote: Hi Group, I have a Micor mobile set up as repeater. Worked great and was on frequency for over 8 years no problems.(lost rpt site May 2010) and have a new site to get on.The problem i am having is the TX drifted 5 khz up on TX from 145.310 to 145.315. I get plenty of deviation and audio drive and 9.6 v to crystal element. I am not having any luck messing with Netting adjustment i get -200 hz max. I also have a UHF Rx unit for control installed and it is 10khz low on frequency. The 144.710 RX crystal is right on the money for specs. Very odd situation. anyone have ideas where to check or a fluke the crystals are both bad. Ryan n3ssl Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links
[Repeater-Builder] Re: Mystery Micor problem
Glenn, Is it safe to say look in the channel element for the bad cap ? Tempeture is not a issue with this unit it was in a heated and A/C garage kept about 65-80 degrees with dehumdifer. I am glad the new site is climate controlled also. Ryan n3ssl --- In Repeater-Builder@yahoogroups.com, Glenn Little WB4UIV glennmaill...@... wrote: We had this problem in Johnson radios. What it turned out to be was a plate of a silver mica capacitor coming disconnected internally in the capacitor. This caused the capacitor to shift to a lower capacitance by the amount that the plate contributed to the capacitor. The lower capacitance caused the radio frequency to shift high and outside the tuning range of the netting device. I cannot tell you what capacitor has failed. Check the silver mica capacitors in the tuning circuit and replace the one that is low in value. I also have not been in a Micor element in many years. Hope this helps. This appears to be a somewhat common failure for silver mica capacitor due to the way the capacitor is physically constructed. 73 Glenn WB4UIV At 09:09 PM 8/8/2010, you wrote: Glenn, OZ and group Its a step jump 5 khz up and get - 200 hz of crystal movment. What silver mica Cap is it? I have not looked inside a channel element in years usally send them out and trust the mfg. I also gave the crystal movement a thought but was is a temp controlled enviroment. Ryan --- In Repeater-Builder@yahoogroups.com, Glenn Little WB4UIV glennmaillist@ wrote: Was the shift a drift or a step jump? If a step jump, you probably have a bad silver mica capacitor. 73 Glenn WB4UIV At 04:23 PM 8/8/2010, you wrote: Hi Group, I have a Micor mobile set up as repeater. Worked great and was on frequency for over 8 years no problems.(lost rpt site May 2010) and have a new site to get on.The problem i am having is the TX drifted 5 khz up on TX from 145.310 to 145.315. I get plenty of deviation and audio drive and 9.6 v to crystal element. I am not having any luck messing with Netting adjustment i get -200 hz max. I also have a UHF Rx unit for control installed and it is 10khz low on frequency. The 144.710 RX crystal is right on the money for specs. Very odd situation. anyone have ideas where to check or a fluke the crystals are both bad. Ryan n3ssl Yahoo! Groups Links Yahoo! Groups Links
[Repeater-Builder] Mystery Micor problem
Hi Group, I have a Micor mobile set up as repeater. Worked great and was on frequency for over 8 years no problems.(lost rpt site May 2010) and have a new site to get on.The problem i am having is the TX drifted 5 khz up on TX from 145.310 to 145.315. I get plenty of deviation and audio drive and 9.6 v to crystal element. I am not having any luck messing with Netting adjustment i get -200 hz max. I also have a UHF Rx unit for control installed and it is 10khz low on frequency. The 144.710 RX crystal is right on the money for specs. Very odd situation. anyone have ideas where to check or a fluke the crystals are both bad. Ryan n3ssl
[Repeater-Builder] Re: Mystery Micor problem
Glenn, OZ and group Its a step jump 5 khz up and get - 200 hz of crystal movment. What silver mica Cap is it? I have not looked inside a channel element in years usally send them out and trust the mfg. I also gave the crystal movement a thought but was is a temp controlled enviroment. Ryan --- In Repeater-Builder@yahoogroups.com, Glenn Little WB4UIV glennmaill...@... wrote: Was the shift a drift or a step jump? If a step jump, you probably have a bad silver mica capacitor. 73 Glenn WB4UIV At 04:23 PM 8/8/2010, you wrote: Hi Group, I have a Micor mobile set up as repeater. Worked great and was on frequency for over 8 years no problems.(lost rpt site May 2010) and have a new site to get on.The problem i am having is the TX drifted 5 khz up on TX from 145.310 to 145.315. I get plenty of deviation and audio drive and 9.6 v to crystal element. I am not having any luck messing with Netting adjustment i get -200 hz max. I also have a UHF Rx unit for control installed and it is 10khz low on frequency. The 144.710 RX crystal is right on the money for specs. Very odd situation. anyone have ideas where to check or a fluke the crystals are both bad. Ryan n3ssl Yahoo! Groups Links
[Repeater-Builder] Re: dispatch consoles
The Vega C-6200 ( Now Telex) is a popular console that will fit the needs. I know of 3-4 in use in various communications trucks. Ryan n3ssl --- In Repeater-Builder@yahoogroups.com, Jed Barton j...@... wrote: give me an idea of an easy roip console. Any ideas? -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of wd8chl Sent: Monday, July 19, 2010 9:08 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] dispatch consoles On 7/17/2010 12:47 PM, Bill Smith wrote: Used is false economy. You end with someone elses problems and high maintenance costs as well as downtime which is a bad thing for an ambulance company. The 4010 is a nice reliable system, much simpler than the RoIP stuff but not nearly as versatile. The nice part of RoIP is that by using internet connectivity, you can have it loaded on a laptop and set up dispatch anywhere there is an internet connection in the world. Bill The bad news is so can anyone else...
[Repeater-Builder] Re: Motorola radios and Zetron 37 controller
Hi Group, The first thing to monitor is the TX power does it drop when it locks up? After years the GM300's are prone to problems with loose connectors dealing with temp changes. Read the article on the repeater-builder's website concerning the GM300 and Maxtrac about the VCO adjustments also works for the Maratrac series. Ryan n3ssl
[Repeater-Builder] Re: Pager Interference Revisited
What Coax or hardline and antenna's are in use for both rpt's ? What happens when another RX is used at the site? Maybe a IF issue with the Ham rpt's and 72 mhz some thoughts. Ryan n3ssl
[Repeater-Builder] Re: Micor ?
Hi Kevin and group, I get PTT on pin 9 and 10. before i replace parts the manual says about Q8 and a CR5 as problems any thoughts ? Ryan n3ssl --- In Repeater-Builder@yahoogroups.com, Kevin Custer kug...@... wrote: n3ssl wrote: Hi Group, I have a Vhf Micor unified station that was modfied prior to ownership. The Mods for the Station control module were performed as on the RB site. The problem I am having is there is no PTT on pin 5 of the back plane. Is there something i should check ? The Station control module is the TLN 4635 Ryan n3ssl Ryan, Can you PTT from any of the other inputs? Kevin
[Repeater-Builder] Micor ?
Hi Group, I have a Vhf Micor unified station that was modfied prior to ownership. The Mods for the Station control module were performed as on the RB site. The problem I am having is there is no PTT on pin 5 of the back plane. Is there something i should check ? The Station control module is the TLN 4635 Ryan n3ssl
[Repeater-Builder] Ot: Need a Power Supply
Hi Group, I am need of a Micor Power supply, I have a new style micor supply that voltage spiked upon powering see 32-40 volts and than 11.1 volts. If anyone has a idea how to remedy this problem or has a ferro-resident supply I would be intersted. Also in need of a Micor audio squelch board due to power supply issue. used to have several but now in use. Thanks in advance, Ryan n3ssl
[Repeater-Builder] Re: MASTER II TO RC-210
Hi Group, Perform a Search on www.youtube.com for GE Mastr A guy from Allentown PA has a good videos on what it takes to convert a mobile and do the controller install. Very informative Ryan n3ssl
[Repeater-Builder] Re: Rebuilding a Stationmaster
Hi Group, I think the guy is talking about the new station master made by celwave RFS. These don't have the flat head screws. Has anyone taken apart any of the new style? And if so any pictures ? Ryan n3ssl
