Re: [Repeater-Builder] Micor mobile repeater - no audio?
At 07:00 PM 6/4/05, you wrote: Hey gang, I've got a Repeater Builder UHF micor converted mobile repeater running great for several years.. Last week sometime it stopped passing audio.. dtmf, etc... I can key it fine from places like usual, but it doesn't seem to pass any audio.. Would this be more of a controller issue or possibly something awry with my micor? Its running a CAT250 controller. Comments appreciated ofcourse. Rod NJ First clean the inter-board pins. Power it off, remove all the screws that mount the boards that plug into the center board, and unplug them halfway, then plug them back in several times i.e. stroke the male pins in and out of the female connectors (and get your mind out of the gutter). I've seen several Micors develop weird problems that were temporarily fixed that way. The fix lasts 6 months to a year, and I've yet to come up with a cure other than soldering them all, which - while the problem is fixed - makes the radio unrepairable in the future. The problem seems to occur much less often in mobiles, but does occur. Same problem happens to Mitreks, but Moto came up with a fix for that ... replacement connectors with different metallurgy in the plating of the contact pins. 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 the Yahoo! Terms of Service.
[Repeater-Builder] Micor Mobile Repeater - No Audio?
Many years ago, my friend W8ICN told me of a cure for the invisible corrosion on Micor pins that they had developed at Detroit Edison. I couldn't remember what it was, so I dropped him an email about it. Here is his reply. Dan Hancock N8DJP We used a mixture of Squibb mineral oil and isopropol alcohol, about a 1:3 ratio, 1 part mineral oil and 3 parts alcohol. With the boards unplugged, coat the pins and sockets using a small artist brush. The alcohol evaporates quickly leaving a fine coat of oil on the pins which inhibits corrosion. Works well. Do not scrape the pins otherwise you will be removing the plating causing even bigger problems. Of course if the pins are corroded to start with, gently clean off the gunk before applying the oil and alcohol.DanDaniel Hancock wrote: Read the messages below. What was the "magic solution" you guys at Edison used to help with this probelm? It was a mixture of two thingsmineral oil and something maybe??? Message: 18 Date: Sat, 04 Jun 2005 21:42:21 -0700 From: Mike Morris [EMAIL PROTECTED]Subject: Re: Micor mobile repeater - no audio?At 07:00 PM 6/4/05, you wrote:Hey gang,I've got a "Repeater Builder" UHF micor converted mobile repeater running great for several years.. Last week sometime it stopped passing audio.. dtmf, etc... I can key it fine from places like usual, but it doesn't seem to pass any audio.. Would this be more of a controller issue or possibly something awry with my micor? Its running a CAT250 controller. Comments appreciated ofcourse.RodNJFirst clean the inter-board pins.Power it off, remove all the screws that mount the boardsthat plug into the center board, and unplug them halfway,then plug them back in several times i.e. "stroke" themale pins in and out of the female connectors (and getyour mind out of the gutter). I've seen several Micorsdevelop weird problems that were temporarily "fixed"that way. The fix lasts 6 months to a year, and I'veyet to come up with a cure other than soldering themall, which - while the problem is fixed - makes theradio unrepairable in the future. The problem seemsto occur much less often in mobiles, but does occur.Same problem happens to Mitreks, but Moto cameup with a fix for that ... replacement connectors withdifferent metallurgy in the plating of the contact pins.Mike WA6ILQ[This message contained attachments] Discover Yahoo! Get on-the-go sports scores, stock quotes, news & more. Check it out! 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.
Re: [Repeater-Builder] Micor Mobile Repeater - No Audio?
Radio shack now carries DeOxit and ProGold which are excellent products for contacts. 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] Micor Mobile Repeater - No Audio?
There is a Canadian product that is excellent for connectionsit's called Stabilant 22 and has been around for years. It is a contact enhancer. It is quite expensive but you only need a tiny drop of it. I've used it on all kinds of co-ax connectors and most of my repeater desense went away after applying this stuff. It's produced by DW Electrochemicals in Richmond Hill Ontario. 73 John VE3AMZ - Original Message - From: Dan Hancock To: Repeater-Builder@yahoogroups.com Sent: Sunday, June 05, 2005 8:52 PM Subject: [Repeater-Builder] Micor Mobile Repeater - No Audio? Many years ago, my friend W8ICN told me of a cure for the invisible corrosion on Micor pins that they had developed at Detroit Edison. I couldn't remember what it was, so I dropped him an email about it. Here is his reply. Dan Hancock N8DJP We used a mixture of Squibb mineral oil and isopropol alcohol, about a 1:3 ratio, 1 part mineral oil and 3 parts alcohol. With the boards unplugged, coat the pins and sockets using a small artist brush. The alcohol evaporates quickly leaving a fine coat of oil on the pins which inhibits corrosion. Works well. Do not scrape the pins otherwise you will be removing the plating causing even bigger problems. Of course if the pins are corroded to start with, gently clean off the gunk before applying the oil and alcohol.DanDaniel Hancock wrote: Read the messages below. What was the "magic solution" you guys at Edison used to help with this probelm? It was a mixture of two thingsmineral oil and something maybe??? Message: 18 Date: Sat, 04 Jun 2005 21:42:21 -0700 From: Mike Morris [EMAIL PROTECTED]Subject: Re: Micor mobile repeater - no audio?At 07:00 PM 6/4/05, you wrote:Hey gang,I've got a "Repeater Builder" UHF micor converted mobile repeater running great for several years.. Last week sometime it stopped passing audio.. dtmf, etc... I can key it fine from places like usual, but it doesn't seem to pass any audio.. Would this be more of a controller issue or possibly something awry with my micor? Its running a CAT250 controller. Comments appreciated ofcourse.RodNJFirst clean the inter-board pins.Power it off, remove all the screws that mount the boardsthat plug into the center board, and unplug them halfway,then plug them back in several times i.e. "stroke" themale pins in and out of the female connectors (and getyour mind out of the gutter). I've seen several Micorsdevelop weird problems that were temporarily "fixed"that way. The fix lasts 6 months to a year, and I'veyet to come up with a cure other than soldering themall, which - while the problem is fixed - makes theradio unrepairable in the future. The problem seemsto occur much less often in mobiles, but does occur.Same problem happens to Mitreks, but Moto cameup with a fix for that ... replacement connectors withdifferent metallurgy in the plating of the contact pins.Mike WA6ILQ[This message contained attachments] Discover Yahoo!Get on-the-go sports scores, stock quotes, news more. Check it out! 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.
RE: [Repeater-Builder] Micor Mobile Repeater - No Audio?
E F Johnson had a similar solutionfor this, they sent it in syringes! I have one sitting next to my computer right now. Paul -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of Dan HancockSent: Sunday, June 05, 2005 7:52 PMTo: Repeater-Builder@yahoogroups.comSubject: [Repeater-Builder] Micor Mobile Repeater - No Audio? Many years ago, my friend W8ICN told me of a cure for the invisible corrosion on Micor pins that they had developed at Detroit Edison. I couldn't remember what it was, so I dropped him an email about it. Here is his reply. Dan Hancock N8DJP We used a mixture of Squibb mineral oil and isopropol alcohol, about a 1:3 ratio, 1 part mineral oil and 3 parts alcohol. With the boards unplugged, coat the pins and sockets using a small artist brush. The alcohol evaporates quickly leaving a fine coat of oil on the pins which inhibits corrosion. Works well. Do not scrape the pins otherwise you will be removing the plating causing even bigger problems. Of course if the pins are corroded to start with, gently clean off the gunk before applying the oil and alcohol.DanDaniel Hancock wrote: Read the messages below. What was the "magic solution" you guys at Edison used to help with this probelm? It was a mixture of two thingsmineral oil and something maybe??? Message: 18 Date: Sat, 04 Jun 2005 21:42:21 -0700 From: Mike Morris [EMAIL PROTECTED]Subject: Re: Micor mobile repeater - no audio?At 07:00 PM 6/4/05, you wrote:Hey gang,I've got a "Repeater Builder" UHF micor converted mobile repeater running great for several years.. Last week sometime it stopped passing audio.. dtmf, etc... I can key it fine from places like usual, but it doesn't seem to pass any audio.. Would this be more of a controller issue or possibly something awry with my micor? Its running a CAT250 controller. Comments appreciated ofcourse.RodNJFirst clean the inter-board pins.Power it off, remove all the screws that mount the boardsthat plug into the center board, and unplug them halfway,then plug them back in several times i.e. "stroke" themale pins in and out of the female connectors (and getyour mind out of the gutter). I've seen several Micorsdevelop weird problems that were temporarily "fixed"that way. The fix lasts 6 months to a year, and I'veyet to come up with a cure other than soldering themall, which - while the problem is fixed - makes theradio unrepairable in the future. The problem seemsto occur much less often in mobiles, but does occur.Same problem happens to Mitreks, but Moto cameup with a fix for that ... replacement connectors withdifferent metallurgy in the plating of the contact pins.Mike WA6ILQ[This message contained attachments] Discover Yahoo!Get on-the-go sports scores, stock quotes, news more. Check it out! 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] Micor mobile repeater - no audio?
Hey gang, I've got a "Repeater Builder" UHF micor converted mobile repeater running great for several years.. Last week sometime it stopped passing audio.. dtmf, etc... I can key it fine from places like usual, but it doesn't seem to pass any audio.. Would this be more of a controller issue or possibly something awry with my micor?Its running a CAT250 controller. Comments appreciated ofcourse. Rod NJ 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.
Re: [Repeater-Builder] Micor mobile repeater - no audio?
I would first check the pin contacts in the Micor boards. Then the controller. Oh, you said a CAT controller. Maybe I would check THAT first. ;- Joe M. Rod Barton wrote: Hey gang, I've got a Repeater Builder UHF micor converted mobile repeater running great for several years.. Last week sometime it stopped passing audio.. dtmf, etc... I can key it fine from places like usual, but it doesn't seem to pass any audio.. Would this be more of a controller issue or possibly something awry with my micor? Its running a CAT250 controller. Comments appreciated ofcourse. Rod NJ --- 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. 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] Micor mobile repeater - no audio?
Clean the pins connecting the motherboard to the other boards. Good start.. Paul -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of Rod BartonSent: Saturday, June 04, 2005 9:01 PMTo: Repeater-Builder@yahoogroups.comSubject: [Repeater-Builder] Micor mobile repeater - no audio? Hey gang, I've got a "Repeater Builder" UHF micor converted mobile repeater running great for several years.. Last week sometime it stopped passing audio.. dtmf, etc... I can key it fine from places like usual, but it doesn't seem to pass any audio.. Would this be more of a controller issue or possibly something awry with my micor?Its running a CAT250 controller. Comments appreciated ofcourse. Rod NJ 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.
Re: [Repeater-Builder] Micor mobile repeater - no audio?
Rod Barton wrote: Hey gang, I've got a "Repeater Builder" UHF micor converted mobile repeater running great for several years.. Last week sometime it stopped passing audio.. dtmf, etc... I can key it fine from places like usual, but it doesn't seem to pass any audio.. Would this be more of a controller issue or possibly something awry with my micor?Its running a CAT250 controller. Comments appreciated of course. I'd check and see if audio is present going into the controller with a scope. If it's several years old, it might have a MicorMuteboard installed. If so, the LM-386 might have gone bad. This would be a 8 pin dip IC on a little board. Replacements might be obtained from a local Radio Shack. Do you hear the controller responses okay, like courtesy tones, etc? If so, at least part of the controller and transmitter are likely okay. Kevin Custer Repeater Builder 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.
