RE: [Repeater-Builder] Micor Mobile Repeater - No Audio?

2005-06-05 Thread Paul Finch





E F 
Johnson had a similar solution for 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.>>Rod>NJFirst 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! 













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Re: [Repeater-Builder] Micor Mobile Repeater - No Audio?

2005-06-05 Thread John J. Riddell





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.>>Rod>NJFirst 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! 













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Re: [Repeater-Builder] Micor Mobile Repeater - No Audio?

2005-06-05 Thread Dave VanHorn

Radio shack now carries DeOxit and ProGold which are excellent 
products for contacts.





 
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[Repeater-Builder] Micor Mobile Repeater - No Audio?

2005-06-05 Thread Dan Hancock



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.>>Rod>NJFirst 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!













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Re: [Repeater-Builder] Micor mobile repeater - no audio?

2005-06-04 Thread Mike Morris




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














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Re: [Repeater-Builder] Micor mobile repeater - no audio?

2005-06-04 Thread Kevin Custer






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














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RE: [Repeater-Builder] Micor mobile repeater - no audio?

2005-06-04 Thread Paul Finch





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 
   













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Re: [Repeater-Builder] Micor mobile repeater - no audio?

2005-06-04 Thread mch
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
> 
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>  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.





 
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[Repeater-Builder] Micor mobile repeater - no audio?

2005-06-04 Thread Rod Barton





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 
 













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