[Repeater-Builder] Re: UHF MICOR Unified Chassis
Everyone, today I tried contacting Motorola parts for a manual and/or schematic for the Master Decoder module I have, Part #TLN5803A. Needless to say, navigating Motorola's call-handling system was a real trip. First I ended up with someone in Cell Phones, then someone in Recreational Radio. I finally ended up with Don in Commercial Radio... Don put life and limb at risk by venturing into the old archives. Unfortunately they no longer have any manuals available which refer to this module. :-( He WAS able to give me the manual numbers for the MICOR manuals, but I already have them all. When I asked about the MSY-series station manuals, he said those have been NLA since 1976 or so... So I'm here again to plead with those who have old libraries of Motorola manuals -- PLEASE check your stash to see if you may have anything for the MSY-series community repeater. (Possible model number C74MSY-3101BY or similar - the BY is the key here, I think.) I have seen a older MSY-series station on eBay with this card in the chassis, so hopefully someone out there has the manual for it. I *REALLY* need this schematic to get my repeater going... Thanks, Mark - N9WYS / WQIV271 -Original Message- From: Eric Lemmon [mailto:[EMAIL PROTECTED] Mark, It's a long shot, but you might try calling Motorola Parts ID at 800-422-4210 and asking for the publication number that covers the TLN5803A. Coincidentally, I found a TLN5803A listed as one of the modules in a C74MSY-3101BY station on eBay. I just happen to have an MSY manual, but it applies to the BT repeater; I'm guessing that the BY is a community repeater. 73, Eric Lemmon WB6FLY -Original Message- From: n9wys [mailto:[EMAIL PROTECTED] Apparently Kevin has shut the list down for a while... :-( Mark - N9WYS -Original Message- From: n9wys [mailto:[EMAIL PROTECTED] Eric, The Master Control module I have is: TLN5803A The module referenced in my manual is: TRN6165A. The manual's module is definitely a newer design - it is IC-based (two chips on the board). My modules are pre-IC -- no chips at all. I've also seen cover designs for (what I believe is) an earlier version of the Comm. Rptr. manual supplement, so there is at least one version prior to the one I have... Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Eric Lemmon Mark, What is the number stamped in black ink directly on the PCB of the master control module? I know you recently received the community repeater manual, and that manual doesn't contain the information on that module? Odd... 73, Eric Lemmon WB6FLY
[Repeater-Builder] Re: UHF MICOR Unified Chassis
Are you sure you have the encode board plugged in with a reed plugged in? --- In Repeater-Builder@yahoogroups.com, n9wys [EMAIL PROTECTED] wrote: More information about this project. I have the station working - receiving, decoding proper PL tone, repeating, transmitting audio, etc. The only thing it is NOT doing is encoding tone for transmit. (A reminder - this is a Community Repeater MICOR chassis, NOT the standard repeater chassis.) Anyway - from what I can tell, the Master Control module is NOT sending tone out to the modulator. The problem I have is this: the manual supplement I have shows a different Master Control module that what I have. My modules are not IC-based, the ones on the manual are. Therefore, I believe the schematic and operation for the module I have is completely different than that in the manual. Does anyone have an earlier issue of the Community Repeater manual - 68P81025E55 (probably revision A, since mine is a B)? *ALL* I think I need are the pages pertaining to the Master Control Module - part #TLN5803A. (Other part numbers may be: TLN8780A or TLN1684A - these are numbers stamped on the flange of the card - the first number above was printed right on the circuit board.) The module referenced in my manual is TRN6165A. For those with a manual - I am seeing tone at Pin 7 (Tone PL Out) but not at Pin 2 (Tone or Binary PL to Modulator) on the Master Control module. I tried merely jumpering Pin 7 to Pin 2 - doesn't work. Because the schematic and board layout is completely different, I have no reference to be able to chase signal through the circuit. I'm also wondering if a required jumper is missing or a jumper is improperly installed on my Master Control card. Thanks! Mark - N9WYS
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Yes... The station is a Community Repeater - not the conventional MICOR repeater that most are familiar with. In other words, it uses a different backplane and different card configuration than a regular repeater. The primary PL card is called a Four User Control Module and can have up to four Vibrasponder reeds in it (as does mine). The Master Control card does the PL encoding for transmit. If you have the MICOR Community Repeater manual supplement, please check through it and you'll see what I am referring to. The problem seems to be with the Master Control module not sending the tone out on Pin 2. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of godofrepeaters Are you sure you have the encode board plugged in with a reed plugged in? --- In Repeater-Builder@yahoogroups.com, n9wys [EMAIL PROTECTED] wrote: More information about this project. I have the station working - receiving, decoding proper PL tone, repeating, transmitting audio, etc. The only thing it is NOT doing is encoding tone for transmit. (A reminder - this is a Community Repeater MICOR chassis, NOT the standard repeater chassis.) Anyway - from what I can tell, the Master Control module is NOT sending tone out to the modulator. The problem I have is this: the manual supplement I have shows a different Master Control module that what I have. My modules are not IC-based, the ones on the manual are. Therefore, I believe the schematic and operation for the module I have is completely different than that in the manual. Does anyone have an earlier issue of the Community Repeater manual - 68P81025E55 (probably revision A, since mine is a B)? *ALL* I think I need are the pages pertaining to the Master Control Module - part #TLN5803A. (Other part numbers may be: TLN8780A or TLN1684A - these are numbers stamped on the flange of the card - the first number above was printed right on the circuit board.) The module referenced in my manual is TRN6165A. For those with a manual - I am seeing tone at Pin 7 (Tone PL Out) but not at Pin 2 (Tone or Binary PL to Modulator) on the Master Control module. I tried merely jumpering Pin 7 to Pin 2 - doesn't work. Because the schematic and board layout is completely different, I have no reference to be able to chase signal through the circuit. I'm also wondering if a required jumper is missing or a jumper is improperly installed on my Master Control card. Thanks! Mark - N9WYS Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.6.1/1607 - Release Date: 8/12/2008 7:19 AM
[Repeater-Builder] Re: UHF MICOR Unified Chassis
A community repeater has NO PL Encoder.. The PL from the receiver is decoded and the PL tone is low pass filtered and passed to the transmitter PL Encode input by the Master Decoder card in the station. So, if you key the station locally there is NO PL Encode. Also, there is NO PL tone on the tail either. n9wys wrote: Yes... The station is a Community Repeater - not the conventional MICOR repeater that most are familiar with. In other words, it uses a different backplane
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Not in those words (PL encoder) no... and I understand that. I am keying the repeater with an external source (AKA: HT) that is encoding PL. The Master Control module is NOT passing PL to the modulator on Pin 2. THIS is my problem. I need a schematic for the Master Control module that I have in my possession so I can troubleshoot further. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of sgreact47 A community repeater has NO PL Encoder.. The PL from the receiver is decoded and the PL tone is low pass filtered and passed to the transmitter PL Encode input by the Master Decoder card in the station. So, if you key the station locally there is NO PL Encode. Also, there is NO PL tone on the tail either. n9wys wrote: Yes... The station is a Community Repeater - not the conventional MICOR repeater that most are familiar with. In other words, it uses a different backplane
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Mark, What is the number stamped in black ink directly on the PCB of the master control module? I know you recently received the community repeater manual, and that manual doesn't contain the information on that module? Odd... 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of n9wys Sent: Tuesday, August 12, 2008 6:36 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis Not in those words (PL encoder) no... and I understand that. I am keying the repeater with an external source (AKA: HT) that is encoding PL. The Master Control module is NOT passing PL to the modulator on Pin 2. THIS is my problem. I need a schematic for the Master Control module that I have in my possession so I can troubleshoot further. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com On Behalf Of sgreact47 A community repeater has NO PL Encoder.. The PL from the receiver is decoded and the PL tone is low pass filtered and passed to the transmitter PL Encode input by the Master Decoder card in the station. So, if you key the station locally there is NO PL Encode. Also, there is NO PL tone on the tail either. n9wys wrote: Yes... The station is a Community Repeater - not the conventional MICOR repeater that most are familiar with. In other words, it uses a different backplane
Re: [Repeater-Builder] Re: UHF MICOR Unified Chassis
n9wys wrote: Well, Joe - I got it to work! What I ended up doing was chasing the audio path from the goes-inna through the backplane. I found that on the Squelch Gate card, it was not being passed, even though the jumper was in place. I added a hard-wire jumper to the backplane between Pins 11 and 24, and VOILA! The next thing I need to do is figure out why I cannot defeat PL operation... when I switch the Station Control to PL DISABLE, the station still transmits. In fact, it transmits even when the LINE DISABLE is switched on, too. More jumpers, I fear. It's not supposed to. It doesn't say 'Transmit Disable'. Line Disable will disable any DC or Tone remote. PL just opens the local speaker to carrier squelch.
Re: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Check the repeater-builder site for a mod to the station control module to make it DISABLE the transmitter and add a status LED as well. Bill - WA0CBW In a message dated 8/5/2008 10:23:34 A.M. Central Daylight Time, [EMAIL PROTECTED] writes: n9wys wrote: Well, Joe - I got it to work! What I ended up doing was chasing the audio path from the goes-inna through the backplane. I found that on the Squelch Gate card, it was not being passed, even though the jumper was in place. I added a hard-wire jumper to the backplane between Pins 11 and 24, and VOILA! The next thing I need to do is figure out why I cannot defeat PL operation... when I switch the Station Control to PL DISABLE, the station still transmits. In fact, it transmits even when the LINE DISABLE is switched on, too. More jumpers, I fear. It's not supposed to. It doesn't say 'Transmit Disable'. Line Disable will disable any DC or Tone remote. PL just opens the local speaker to carrier squelch. Yahoo! Groups Links **Looking for a car that's sporty, fun and fits in your budget? Read reviews on AOL Autos. (http://autos.aol.com/cars-BMW-128-2008/expert-review?ncid=aolaut000517 )
Re: [Repeater-Builder] Re: UHF MICOR Unified Chassis
[EMAIL PROTECTED] wrote: Check the repeater-builder site for a mod to the station control module to make it DISABLE the transmitter and add a status LED as well. Bill - WA0CBW Right-mine is similar. I re-purposed the PL disable transistor to function as the F1 channel element enable (wired to PTT so the element is only active on TX). When the PL disable switch is flipped, the light comes on, and the channel element cannot be turned on.
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Thanks Bill - will most certainly do this! Mark - N9WYS From: Repeater-Builder@yahoogroups.com On Behalf Of [EMAIL PROTECTED] Check the repeater-builder site for a mod to the station control module to make it DISABLE the transmitter and add a status LED as well. Bill - WA0CBW
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Well, more progress... I couldn't sleep this morning and was up before the crack of dawn (in other words, about 4AM) so I decided to do more testing the station. I have discovered that in order to defeat any individual PL RX tones, I must have the tone switch OFF on the Four User Control Module *AND* the PL DISABLE switch active on the Station Control Module. Jumpers JU-5 through -8 are OUT on the Four User Control Module - these are for AND gating of PL with the concurrent use of a Single Tone Decoder Module, something I do not have. (If I understand the manual, all I need are JU-1 thru -4 for proper operation without the Single Tone Decoder Module. Manual reads: JU-1 through JU-4 provide operation without Single-Tone decoder.) Again, if I am understanding the manual, the station takes decode PL and retransmits it via the Master Decoder Module... The manual reads: Tone 'Private Line' signal from the receiver discriminator is applied to Station Control module Pin 21, amplified, and then routed to Master Decoder Pin 23. In the Master Decoder module, the tone signal is passed through a bandpass filter, buffer amplifier Q801, amplifier Q802, and level control R807 to the input side of U801C. This gate inhibits tone passage to the transmitter for retransmission until the gate is enabled as follows. The tone signal applied to the transmission gate is also applied to the same module's output Pin 7, and routed to the Four User Control module input Pin 3. Here, the tone activates an applicable 'Vibrasponder' resonant reed. Any activated reed causes Four User Control module Pin 24 to go low which is in turn applied back to the Master Decoder module at Pin 17. This low is inverted to a high by Q806 and applied to transmission gate U801C which then passes the tone signal waiting at the gate on to the transmitter for retransmission. A 150 millisecond drop-out delay network is included in the Master Decoder module which holds on the transmitter 150 milliseconds after loss of P-T-T during which time a 'reverse burst' 'Private Line' signal is transmitted which immediately squelches applicable receivers. This (Master Decoder / Four User Decoder interfaces) is where I think the PL encode problem lies, but I don't have an oscilloscope in order to test whether the PL signal is being fed through the circuitry properly. My problem is, the manual refers to a Master Decoder module that has two IC chips on the board - my module are older design and have no ICs. I'm thinking there should be a jumper either installed or removed, but no jumpers are called out on the cards I have so I have no way of telling if they are present or missing. (Funny - earlier I was complaining that I thought I had newer cards, now it is becoming apparent I have a mix of both. Go figure.) The LINE DISABLE still does not work as I expect (I want it so the station does not transmit on any input when enabled) but maybe that is a switch combination I haven't figured out yet, too... It seems that this Community Repeater works differently than the regular MICOR station, so I'm still feeling my way along with it. Thanks for all the help and support! Still chugging along... Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Eric Lemmon Mark, Congratulations on your progress! However, I am curious about your comment that the repeater is not passing the PL tone through, On a community repeater, wouldn't you want the input tone filtered out of the audio chain and recreated fresh for transmission? Not all community repeaters use the same tone for encode as for decode. Some user radios may have less-than-pure tones, and may be over-deviated; it may not be prudent to allow such tones to pass through. Perhaps you need a Vibrasender reed installed for the encode function. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of n9wys Sent: Saturday, August 02, 2008 7:32 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis Well, Joe - I got it to work! What I ended up doing was chasing the audio path from the goes-inna through the backplane. I found that on the Squelch Gate card, it was not being passed, even though the jumper was in place. I added a hard-wire jumper to the backplane between Pins 11 and 24, and VOILA! The next thing I need to do is figure out why I cannot defeat PL operation... when I switch the Station Control to PL DISABLE, the station still transmits. In fact, it transmits even when the LINE DISABLE is switched on, too. More jumpers, I fear. Also, I find that it does not matter whether I have the individual PL tones enabled or disabled on the Four User Module - if I transmit the proper tone to the station, the repeater transmits. And it is not passing that PL tone to the output. (Which I want.) But at least I now have repeat audio. To answer your questions
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Well, changing out the backplane got the repeater working... along with double-checking the jumper settings one the cards. I did find a couple of jumpers that needed to come out on the Station Control card, and I'm sure that helped. The machine still does not pass audio, so now that it is working in the way it is supposed to be configured, next thing to do is chase down the audio path. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Joe Burkleo Mark, I think you have a good idea about starting fresh with an unaltered board. That would be my next move. It could not hurt to grab another set of cards also. These are old enough that I have found some bad caps and a bad transistor or two when going through my extra cards. What I will usually do is get a station working and then substitute boards and find out if they are good or bad. I have a box that the bad boards go into and then I fix them as time allows. You maybe fighting two or three different problems. You might also try a different audio/squelch board or two. I have had these cause goofy problems with cor/PL signals and repeat audio. This may not be your problem, but just gives you another place to look for missing signals. Joe - WA7JAW
Re: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Now you are learning how to properly work on motorola equipmenttrial error By fixing it the way you are, problem by problem, you will know the repeater in and out so it will be easier to work on in the future. Sounds like you are almost there if you only have an audio problem left. Hope you get it all working. Mike - Original Message - From: n9wys To: Repeater-Builder@yahoogroups.com Sent: Saturday, August 02, 2008 5:15 PM Subject: RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis Well, changing out the backplane got the repeater working... along with double-checking the jumper settings one the cards. I did find a couple of jumpers that needed to come out on the Station Control card, and I'm sure that helped. The machine still does not pass audio, so now that it is working in the way it is supposed to be configured, next thing to do is chase down the audio path. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Joe Burkleo Mark, I think you have a good idea about starting fresh with an unaltered board. That would be my next move. It could not hurt to grab another set of cards also. These are old enough that I have found some bad caps and a bad transistor or two when going through my extra cards. What I will usually do is get a station working and then substitute boards and find out if they are good or bad. I have a box that the bad boards go into and then I fix them as time allows. You maybe fighting two or three different problems. You might also try a different audio/squelch board or two. I have had these cause goofy problems with cor/PL signals and repeat audio. This may not be your problem, but just gives you another place to look for missing signals. Joe - WA7JAW
[Repeater-Builder] Re: UHF MICOR Unified Chassis
Mark, OK, now back to where we started from, but much better. I have a bunch of questions for you. 1. Do you have a local speaker hooked up? If so do you have audio out of the speaker in either carrier squelch or PL mode? 2. Do you have repeat audio in carrier squelch mode? I know you do not have repeat audio in PL mode. 3. Have the and squelch jumpers been cut on the audio/squelch card or are they still in place? 4. Does the repeater key up in either carrier squelch or PL mode, or in both modes? If I think I understand the problem correctly, the radio keys up and repeats in PL mode, it just does not pass repeat audio, but it works fine in carrier access or Pl disable mode. Please correct me if I am wrong here. 73, Joe - WA7JAW --- In Repeater-Builder@yahoogroups.com, n9wys [EMAIL PROTECTED] wrote: Well, changing out the backplane got the repeater working... along with double-checking the jumper settings one the cards. I did find a couple of jumpers that needed to come out on the Station Control card, and I'm sure that helped. The machine still does not pass audio, so now that it is working in the way it is supposed to be configured, next thing to do is chase down the audio path. Mark - N9WYS
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Well, Joe - I got it to work! What I ended up doing was chasing the audio path from the goes-inna through the backplane. I found that on the Squelch Gate card, it was not being passed, even though the jumper was in place. I added a hard-wire jumper to the backplane between Pins 11 and 24, and VOILA! The next thing I need to do is figure out why I cannot defeat PL operation... when I switch the Station Control to PL DISABLE, the station still transmits. In fact, it transmits even when the LINE DISABLE is switched on, too. More jumpers, I fear. Also, I find that it does not matter whether I have the individual PL tones enabled or disabled on the Four User Module - if I transmit the proper tone to the station, the repeater transmits. And it is not passing that PL tone to the output. (Which I want.) But at least I now have repeat audio. To answer your questions, Joe: 1) Yes, I had a local speaker connected (through my R-1033 test set) and I could hear audio coming in through the receiver section. 2) I cannot get the station to operate in CSQ mode for now... 3) I'll have to look in regard to the AND squelch jumpers, but I followed the manual for correct jumper settings for each of the cards. 4) The repeater keys only in PL mode now... At this stage I'm not sure whether you're right or wrong, Joe. But at least it's alive - if only at 50%. ;-) Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Joe Burkleo Mark, OK, now back to where we started from, but much better. I have a bunch of questions for you. 1. Do you have a local speaker hooked up? If so do you have audio out of the speaker in either carrier squelch or PL mode? 2. Do you have repeat audio in carrier squelch mode? I know you do not have repeat audio in PL mode. 3. Have the and squelch jumpers been cut on the audio/squelch card or are they still in place? 4. Does the repeater key up in either carrier squelch or PL mode, or in both modes? If I think I understand the problem correctly, the radio keys up and repeats in PL mode, it just does not pass repeat audio, but it works fine in carrier access or Pl disable mode. Please correct me if I am wrong here. 73, Joe - WA7JAW
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Mark, Congratulations on your progress! However, I am curious about your comment that the repeater is not passing the PL tone through, On a community repeater, wouldn't you want the input tone filtered out of the audio chain and recreated fresh for transmission? Not all community repeaters use the same tone for encode as for decode. Some user radios may have less-than-pure tones, and may be over-deviated; it may not be prudent to allow such tones to pass through. Perhaps you need a Vibrasender reed installed for the encode function. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of n9wys Sent: Saturday, August 02, 2008 7:32 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis Well, Joe - I got it to work! What I ended up doing was chasing the audio path from the goes-inna through the backplane. I found that on the Squelch Gate card, it was not being passed, even though the jumper was in place. I added a hard-wire jumper to the backplane between Pins 11 and 24, and VOILA! The next thing I need to do is figure out why I cannot defeat PL operation... when I switch the Station Control to PL DISABLE, the station still transmits. In fact, it transmits even when the LINE DISABLE is switched on, too. More jumpers, I fear. Also, I find that it does not matter whether I have the individual PL tones enabled or disabled on the Four User Module - if I transmit the proper tone to the station, the repeater transmits. And it is not passing that PL tone to the output. (Which I want.) But at least I now have repeat audio. To answer your questions, Joe: 1) Yes, I had a local speaker connected (through my R-1033 test set) and I could hear audio coming in through the receiver section. 2) I cannot get the station to operate in CSQ mode for now... 3) I'll have to look in regard to the AND squelch jumpers, but I followed the manual for correct jumper settings for each of the cards. 4) The repeater keys only in PL mode now... At this stage I'm not sure whether you're right or wrong, Joe. But at least it's alive - if only at 50%. ;-) Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com On Behalf Of Joe Burkleo Mark, OK, now back to where we started from, but much better. I have a bunch of questions for you. 1. Do you have a local speaker hooked up? If so do you have audio out of the speaker in either carrier squelch or PL mode? 2. Do you have repeat audio in carrier squelch mode? I know you do not have repeat audio in PL mode. 3. Have the and squelch jumpers been cut on the audio/squelch card or are they still in place? 4. Does the repeater key up in either carrier squelch or PL mode, or in both modes? If I think I understand the problem correctly, the radio keys up and repeats in PL mode, it just does not pass repeat audio, but it works fine in carrier access or Pl disable mode. Please correct me if I am wrong here. 73, Joe - WA7JAW
[Repeater-Builder] Re: UHF MICOR Unified Chassis
Mark, Sorry to hear you are still having problems. The Micor series of radios were made for many years and yes, there were several variations of most every module made. That is one of the reasons that there was a complete manual set delivered with each radio. Without a whole drawer full of manuals, these can be a beast to work on, especially when you are reassembling units from pieces of different radio combinations. I checked my community repeater manual and it does not cover the backplane board that you have either. I sometimes have to do what you are doing where you do not have a complete station to start with and it is not uncommon for us to have 4 or 5 manuals spread all over the bench to find info on all the different modules and boards we are working with. If the original customer was large enough, Motorola would supply a custom configuration made to their needs or specs along with a special set of manuals that only covered that configuration. Could be that you have stumbled across something like that also. If you leave the line driver card out, which is fine to do in your application, make sure you set the jumpers accordingly, to be a non-wireline repeater station. The jumper settings chart can be a little confusing, so make sure you are reading the proper lines on the chart. Does you control and applications manual and your community repeater manual have the same station control and squelch gate modules listed in them? Good Luck, Joe - WA7JAW --- In Repeater-Builder@yahoogroups.com, n9wys [EMAIL PROTECTED] wrote: Well, the MICOR Community Repeater manual supplement arrived today, and I've been going through it with the proverbial fine-toothed comb. I replaced most of the jumpers I originally removed from the backplane. (According to the jumper matrix in the CR manual, they needed to be IN whereas the regular repeater indicated they needed to be OUT.) I also went through the various cards necessary and checked jumper settings for those. This is where I ran into my next problem(s). First off, the repeater does NOT need a Line Driver card for Community Repeater operation. I does need: Time Out Timer Station Control Squelch Gate Master Decoder and 4-User Control modules. I went through the manual to set the jumpers as necessary, but ran into a snag with the Squelch Gate. Both manuals (Community Repeater and Control and Applications) identify the Squelch Gate card as TLN4662A. I have about a dozen SG cards and they're all TLN8772A, of various vintage. Parts are laid out differently than what is shown in the manuals, and I can't even find some of the jumpers referenced in the manuals on the cards. Specifically, I can't seem to find JU-12, JU-14 or JU-15... if they're on the card, they aren't very marked well. Anyway, I've actually take a step backward with this project, in that once I replaced the jumpers on the backplane, I lost repeater operation with the Line Driver card. (In a way, I kind of expected that, though.) I was able before to key the repeater with the proper input freq and PL, now I cannot. Also if I key the station with the PTT switch on the Station Control card, it does not drop when PTT is released. My first question is: Is there a different version of the Squelch Gate card that I need, or is the TLN8772A a direct replacement? If it is a direct replacement card, does anyone have the manual page(s) for this particular card so I can get the jumper settings and locations picked out? My thinking at the moment is that I still don't have the jumper configuration correct on the SG card... Next, the manual calls out yet a different part number for the backplane: TCN1211A. To reiterate, my backplane is a TRN6421A. I'm getting more confused as time goes on. If Motorola issued upgrades/revisions for the various control cards and the backplane, the documentation isn't contained in any of the manuals I have. My backplane is apparently properly labeled for card placement (according to the Community Repeater manual) but for whatever reason, I'm not making any progress.
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Hi, Joe. Yep, unfortunately they reference the same modules in both manuals. And I am trying to configure the jumpers for a non-wireline RT station. I wonder if I may have screwed something up when I took most of the jumpers out of the backplane (all except JU-5) and them put them back. Since I have an ample supply of backplane boards (I have 14 of these chassis here) maybe I'll just swap out the backplane for one I haven't performed surgery on yet... That MAY eliminate some of the problems, since these stations were on the air previously. From there, I can start to work with the cards. I know that another local ham has yet another set of MICOR manuals - maybe his manuals reference my newer cards. If not, I'm not sure where I'll turn next. If anyone else here has a MICOR Community Repeater in operation, please give me a shout out!! I'd like to check jumper settings against what you have. I've got to be missing something somewhere. (Kevin, you still haven't commented yet...) Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Joe Burkleo Mark, Sorry to hear you are still having problems. The Micor series of radios were made for many years and yes, there were several variations of most every module made. That is one of the reasons that there was a complete manual set delivered with each radio. Without a whole drawer full of manuals, these can be a beast to work on, especially when you are reassembling units from pieces of different radio combinations. I checked my community repeater manual and it does not cover the backplane board that you have either. I sometimes have to do what you are doing where you do not have a complete station to start with and it is not uncommon for us to have 4 or 5 manuals spread all over the bench to find info on all the different modules and boards we are working with. If the original customer was large enough, Motorola would supply a custom configuration made to their needs or specs along with a special set of manuals that only covered that configuration. Could be that you have stumbled across something like that also. If you leave the line driver card out, which is fine to do in your application, make sure you set the jumpers accordingly, to be a non-wireline repeater station. The jumper settings chart can be a little confusing, so make sure you are reading the proper lines on the chart. Does you control and applications manual and your community repeater manual have the same station control and squelch gate modules listed in them? Good Luck, Joe - WA7JAW --- In Repeater-Builder@yahoogroups.com, n9wys [EMAIL PROTECTED] wrote: Well, the MICOR Community Repeater manual supplement arrived today, and I've been going through it with the proverbial fine-toothed comb. I replaced most of the jumpers I originally removed from the backplane. (According to the jumper matrix in the CR manual, they needed to be IN whereas the regular repeater indicated they needed to be OUT.) I also went through the various cards necessary and checked jumper settings for those. This is where I ran into my next problem(s). First off, the repeater does NOT need a Line Driver card for Community Repeater operation. I does need: Time Out Timer Station Control Squelch Gate Master Decoder and 4-User Control modules. I went through the manual to set the jumpers as necessary, but ran into a snag with the Squelch Gate. Both manuals (Community Repeater and Control and Applications) identify the Squelch Gate card as TLN4662A. I have about a dozen SG cards and they're all TLN8772A, of various vintage. Parts are laid out differently than what is shown in the manuals, and I can't even find some of the jumpers referenced in the manuals on the cards. Specifically, I can't seem to find JU-12, JU-14 or JU-15... if they're on the card, they aren't very marked well. Anyway, I've actually take a step backward with this project, in that once I replaced the jumpers on the backplane, I lost repeater operation with the Line Driver card. (In a way, I kind of expected that, though.) I was able before to key the repeater with the proper input freq and PL, now I cannot. Also if I key the station with the PTT switch on the Station Control card, it does not drop when PTT is released. My first question is: Is there a different version of the Squelch Gate card that I need, or is the TLN8772A a direct replacement? If it is a direct replacement card, does anyone have the manual page(s) for this particular card so I can get the jumper settings and locations picked out? My thinking at the moment is that I still don't have the jumper configuration correct on the SG card... Next, the manual calls out yet a different part number for the backplane: TCN1211A. To reiterate, my backplane is a TRN6421A. I'm getting more confused as time goes on. If Motorola issued upgrades/revisions for the various control cards and the
[Repeater-Builder] Re: UHF MICOR Unified Chassis
Mark, I think you have a good idea about starting fresh with an unaltered board. That would be my next move. It could not hurt to grab another set of cards also. These are old enough that I have found some bad caps and a bad transistor or two when going through my extra cards. What I will usually do is get a station working and then substitute boards and find out if they are good or bad. I have a box that the bad boards go into and then I fix them as time allows. You maybe fighting two or three different problems. You might also try a different audio/squelch board or two. I have had these cause goofy problems with cor/PL signals and repeat audio. This may not be your problem, but just gives you another place to look for missing signals. Joe - WA7JAW --- In Repeater-Builder@yahoogroups.com, n9wys [EMAIL PROTECTED] wrote: Hi, Joe. Yep, unfortunately they reference the same modules in both manuals. And I am trying to configure the jumpers for a non-wireline RT station. I wonder if I may have screwed something up when I took most of the jumpers out of the backplane (all except JU-5) and them put them back. Since I have an ample supply of backplane boards (I have 14 of these chassis here) maybe I'll just swap out the backplane for one I haven't performed surgery on yet... That MAY eliminate some of the problems, since these stations were on the air previously. From there, I can start to work with the cards. I know that another local ham has yet another set of MICOR manuals - maybe his manuals reference my newer cards. If not, I'm not sure where I'll turn next. If anyone else here has a MICOR Community Repeater in operation, please give me a shout out!! I'd like to check jumper settings against what you have. I've got to be missing something somewhere. (Kevin, you still haven't commented yet...) Mark - N9WYS
[Repeater-Builder] Re: UHF MICOR Unified Chassis
Mark, It sounds like you may be missing the modifications on the interconnect boards for and squelch. If the audio/squelch board has been modified for and squelch and the interconnct board changes have not been made, you will have repeat audio in PL Disable or carrier squelch mode and no repeat audio in PL Mode. Not sure if that is your problem, but it is one of the many things that will cause no repeat audio in the PL Enable Mode with a Micor station. I do not have my manuals in front of me, but this information is in the supplement for the station chassis that covers the backplane and the accessory cards. As was also suggested the Community Repeater manual will be your best friend, if you are going to be running the station in that configuration, as there are several differences between a standard repeater configuration and the community repeater configuration. If everything is properly configured the 4 user PL card should do both PL tone decode and encode. If you have trouble finding the information let em know and I can dig out my manual when I am in the shop tomorrow. Good luck with your project. Joe - WA7JAW --- In Repeater-Builder@yahoogroups.com, n9wys [EMAIL PROTECTED] wrote: OK gang, I'm working on another project and have run into a wall. I have a UHF MICOR Unified chassis station that I am reassembling with the thought of putting it on GMRS once finished. Yes, this station was TOTALLY disassembled and scattered to the four winds - chassis, PA and some cards came from one place, more cards from another, yet more cards from yet another place, power supply and cabinet from yet another... I have the station reassembled to the point where it is operating in that it repeats (keys up on receipt of signal and PL) but it does not pass audio. And yes, I am resurrecting it on the freqs it was originally tuned before I make any changes. Right now it's on 462./467. and has one 4-User Control Module (PL decode) card in the chassis. No PL on TX yet... The station has the following cards in the chassis (listed from right to left): Line Driver Station Control Module Squelch Gate Time Out Timer Master Decoder 4-User Control Module Card Am I missing any other cards? I know these stations have jumpers all over the place - backplane, cards, etc. - that all needed to be configured properly for the thing to work the way it should. I have the manuals, but I am stumped. I know I'm missing something, SOMEWHERE - my problem is: WHAT and WHERE? Besides, the manual's diagram for the backplane shows jumpers numbered in a certain sequence and the backplane I have has them numbered differently - they're in the same locations, but numbered differently. (For example JU1 and JU3 are opposite when the manual is compared to the one I have in the shack.) I've also gone to the Repeater-Builder web site, but those pages seem to refer more to the conversion of the station or cards rather than making it work as designed. Maybe once I get it going, then I can think about conversion of the cards that Kevin referenced... Anyway - as far as the backplane goes, I think all jumpers except for JU5 should be OUT. Am I correct? (I currently do not plan on any remote control of the station, but later down the road maybe tone remote operation...) And what about the Line Driver, Squelch Gate and/or Station Control Module cards jumpers? Any ideas? (Kevin, you're the MICOR guru...) Thanks, Mark - N9WYS
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Thanks Joe! Like I wrote earlier, it appears I'm going to have problems finding the Community Repeater supplement... If you can help me with that, I'd be much obliged! I actually have several 4-User Control cards and more tone reeds, so I could potentially have up to maybe 10 or 12 PL codes available. Not sure if I'm going to do that or not at this point (the main question would be why) but I need to use at least one of the 4-User cards, as that is all I have for PL decode/encode... (I see that I can disable the various tones via switches on the front of the card, but as it sits right now, I can only disable ONE of the tones - the others decode and the repeater keys whether the switch is on or off. I'll check for the other mods you speak of. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Joe Burkleo Mark, It sounds like you may be missing the modifications on the interconnect boards for and squelch. If the audio/squelch board has been modified for and squelch and the interconnct board changes have not been made, you will have repeat audio in PL Disable or carrier squelch mode and no repeat audio in PL Mode. Not sure if that is your problem, but it is one of the many things that will cause no repeat audio in the PL Enable Mode with a Micor station. I do not have my manuals in front of me, but this information is in the supplement for the station chassis that covers the backplane and the accessory cards. As was also suggested the Community Repeater manual will be your best friend, if you are going to be running the station in that configuration, as there are several differences between a standard repeater configuration and the community repeater configuration. If everything is properly configured the 4 user PL card should do both PL tone decode and encode. If you have trouble finding the information let em know and I can dig out my manual when I am in the shop tomorrow. Good luck with your project. Joe - WA7JAW
Re: [Repeater-Builder] Re: UHF MICOR Unified Chassis
I see that I can disable the various tones via switches on the front of the card, but as it sits right now, I can only disable ONE of the tones - the others decode and the repeater keys whether the switch is on or off. = I think you may not have a CR back-plane if that is the case good luck. - Original Message - From: n9wys To: Repeater-Builder@yahoogroups.com Sent: Sunday, July 27, 2008 11:38 AM Subject: RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis Thanks Joe! Like I wrote earlier, it appears I'm going to have problems finding the Community Repeater supplement... If you can help me with that, I'd be much obliged! I actually have several 4-User Control cards and more tone reeds, so I could potentially have up to maybe 10 or 12 PL codes available. Not sure if I'm going to do that or not at this point (the main question would be why) but I need to use at least one of the 4-User cards, as that is all I have for PL decode/encode... (I see that I can disable the various tones via switches on the front of the card, but as it sits right now, I can only disable ONE of the tones - the others decode and the repeater keys whether the switch is on or off. I'll check for the other mods you speak of. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Joe Burkleo Mark, It sounds like you may be missing the modifications on the interconnect boards for and squelch. If the audio/squelch board has been modified for and squelch and the interconnct board changes have not been made, you will have repeat audio in PL Disable or carrier squelch mode and no repeat audio in PL Mode. Not sure if that is your problem, but it is one of the many things that will cause no repeat audio in the PL Enable Mode with a Micor station. I do not have my manuals in front of me, but this information is in the supplement for the station chassis that covers the backplane and the accessory cards. As was also suggested the Community Repeater manual will be your best friend, if you are going to be running the station in that configuration, as there are several differences between a standard repeater configuration and the community repeater configuration. If everything is properly configured the 4 user PL card should do both PL tone decode and encode. If you have trouble finding the information let em know and I can dig out my manual when I am in the shop tomorrow. Good luck with your project. Joe - WA7JAW No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.5.6/1575 - Release Date: 7/26/2008 4:18 PM
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Mark, If you're not going to use your repeater as a community repeater, then you don't need the community repeater supplement. There are two Motorola manuals that you do need: 6881025E50 UHF Station Instruction manual, NLA 6881025E60 Control Applications Supplement, NLA Since both of these important documents are now cancelled and NLA from Motorola Parts, they are in the queue to be scanned. Once you have the manuals in hand, you can re-configure the jumpers to restore standalone repeater operation. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of n9wys Sent: Sunday, July 27, 2008 9:39 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis Thanks Joe! Like I wrote earlier, it appears I'm going to have problems finding the Community Repeater supplement... If you can help me with that, I'd be much obliged! I actually have several 4-User Control cards and more tone reeds, so I could potentially have up to maybe 10 or 12 PL codes available. Not sure if I'm going to do that or not at this point (the main question would be why) but I need to use at least one of the 4-User cards, as that is all I have for PL decode/encode... (I see that I can disable the various tones via switches on the front of the card, but as it sits right now, I can only disable ONE of the tones - the others decode and the repeater keys whether the switch is on or off. I'll check for the other mods you speak of. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com On Behalf Of Joe Burkleo Mark, It sounds like you may be missing the modifications on the interconnect boards for and squelch. If the audio/squelch board has been modified for and squelch and the interconnct board changes have not been made, you will have repeat audio in PL Disable or carrier squelch mode and no repeat audio in PL Mode. Not sure if that is your problem, but it is one of the many things that will cause no repeat audio in the PL Enable Mode with a Micor station. I do not have my manuals in front of me, but this information is in the supplement for the station chassis that covers the backplane and the accessory cards. As was also suggested the Community Repeater manual will be your best friend, if you are going to be running the station in that configuration, as there are several differences between a standard repeater configuration and the community repeater configuration. If everything is properly configured the 4 user PL card should do both PL tone decode and encode. If you have trouble finding the information let em know and I can dig out my manual when I am in the shop tomorrow. Good luck with your project. Joe - WA7JAW
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
At 01:03 PM 7/27/2008, you wrote: If you're not going to use your repeater as a community repeater, then you don't need the community repeater supplement. The only problem is that the community repeater station has a different backplane than a regular Micor station does. If he in fact has the community repeater backplane, then the CR supplement is essential. 73, Kevin, K9HX
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Agreed. My statement was based on my very limited exposure to community repeaters, all of which were based upon standard Micor stations with TLN5644A backplanes and connected to Zetron or CSI controllers. What is the part number for the community repeater backplane? The only other station backplane I have worked with is the DVP version, TLN5979A. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Kevin Berlen, K9HX Sent: Sunday, July 27, 2008 10:38 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis At 01:03 PM 7/27/2008, you wrote: If you're not going to use your repeater as a community repeater, then you don't need the community repeater supplement. The only problem is that the community repeater station has a different backplane than a regular Micor station does. If he in fact has the community repeater backplane, then the CR supplement is essential. 73, Kevin, K9HX
[Repeater-Builder] Re: UHF MICOR Unified Chassis
Hi Mark: Pull the exciter board out and measure the resistance between pins one and five on the transmitter interconnect board. There should be infinite resistance between the two pins. If there is continuity between pins one and five on the transmitter interconnect board, cut the trace on the exciter board leading to pin five P902, see note 409 on the Exciter/1ST Bandpass Filter schematic pullout in the Micor Base and Repeater Station Manual 68P81025E60. Gregory AC6VJ --- In Repeater-Builder@yahoogroups.com, n9wys [EMAIL PROTECTED] wrote: OK gang, I'm working on another project and have run into a wall. I have a UHF MICOR Unified chassis station that I am reassembling with the thought of putting it on GMRS once finished. Yes, this station was TOTALLY disassembled and scattered to the four winds - chassis, PA and some cards came from one place, more cards from another, yet more cards from yet another place, power supply and cabinet from yet another... I have the station reassembled to the point where it is operating in that it repeats (keys up on receipt of signal and PL) but it does not pass audio. And yes, I am resurrecting it on the freqs it was originally tuned before I make any changes. Right now it's on 462./467. and has one 4-User Control Module (PL decode) card in the chassis. No PL on TX yet... The station has the following cards in the chassis (listed from right to left): Line Driver Station Control Module Squelch Gate Time Out Timer Master Decoder 4-User Control Module Card Am I missing any other cards? I know these stations have jumpers all over the place - backplane, cards, etc. - that all needed to be configured properly for the thing to work the way it should. I have the manuals, but I am stumped. I know I'm missing something, SOMEWHERE - my problem is: WHAT and WHERE? Besides, the manual's diagram for the backplane shows jumpers numbered in a certain sequence and the backplane I have has them numbered differently - they're in the same locations, but numbered differently. (For example JU1 and JU3 are opposite when the manual is compared to the one I have in the shack.) I've also gone to the Repeater-Builder web site, but those pages seem to refer more to the conversion of the station or cards rather than making it work as designed. Maybe once I get it going, then I can think about conversion of the cards that Kevin referenced... Anyway - as far as the backplane goes, I think all jumpers except for JU5 should be OUT. Am I correct? (I currently do not plan on any remote control of the station, but later down the road maybe tone remote operation...) And what about the Line Driver, Squelch Gate and/or Station Control Module cards jumpers? Any ideas? (Kevin, you're the MICOR guru...) Thanks, Mark - N9WYS
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Before cutting any traces, perhaps it would be a good idea to identify which backplane Mark has. If the jumpers are numbered differently than on the common TLN5644A backplane, it's probably wired quite differently. Since Mark described his repeater as being cobbled together from different machines, there may be some incompatibilities to consider. The Micor CA manual 6881025E60 assumes that the TLN5644A backplane is installed. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of ac6vj Sent: Sunday, July 27, 2008 12:43 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: UHF MICOR Unified Chassis Hi Mark: Pull the exciter board out and measure the resistance between pins one and five on the transmitter interconnect board. There should be infinite resistance between the two pins. If there is continuity between pins one and five on the transmitter interconnect board, cut the trace on the exciter board leading to pin five P902, see note 409 on the Exciter/1ST Bandpass Filter schematic pullout in the Micor Base and Repeater Station Manual 68P81025E60. Gregory AC6VJ --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com , n9wys [EMAIL PROTECTED] wrote: OK gang, I'm working on another project and have run into a wall. I have a UHF MICOR Unified chassis station that I am reassembling with the thought of putting it on GMRS once finished. Yes, this station was TOTALLY disassembled and scattered to the four winds - chassis, PA and some cards came from one place, more cards from another, yet more cards from yet another place, power supply and cabinet from yet another... I have the station reassembled to the point where it is operating in that it repeats (keys up on receipt of signal and PL) but it does not pass audio. And yes, I am resurrecting it on the freqs it was originally tuned before I make any changes. Right now it's on 462./467. and has one 4-User Control Module (PL decode) card in the chassis. No PL on TX yet... The station has the following cards in the chassis (listed from right to left): Line Driver Station Control Module Squelch Gate Time Out Timer Master Decoder 4-User Control Module Card Am I missing any other cards? I know these stations have jumpers all over the place - backplane, cards, etc. - that all needed to be configured properly for the thing to work the way it should. I have the manuals, but I am stumped. I know I'm missing something, SOMEWHERE - my problem is: WHAT and WHERE? Besides, the manual's diagram for the backplane shows jumpers numbered in a certain sequence and the backplane I have has them numbered differently - they're in the same locations, but numbered differently. (For example JU1 and JU3 are opposite when the manual is compared to the one I have in the shack.) I've also gone to the Repeater-Builder web site, but those pages seem to refer more to the conversion of the station or cards rather than making it work as designed. Maybe once I get it going, then I can think about conversion of the cards that Kevin referenced... Anyway - as far as the backplane goes, I think all jumpers except for JU5 should be OUT. Am I correct? (I currently do not plan on any remote control of the station, but later down the road maybe tone remote operation...) And what about the Line Driver, Squelch Gate and/or Station Control Module cards jumpers? Any ideas? (Kevin, you're the MICOR guru...) Thanks, Mark - N9WYS
RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis
OK - I'm now home from work and have had an opportunity to look at the station. The backplane has the following number printed on it: TRN6421A Motorola parts identifies it as: BD INTCONN --- *This item has been cancelled This is all I can seem to find about it right now... And Eric, these are the manuals I currently have: Control and Applications Manuals: 68P81025E60-E and 68P81025E60-F MICOR Base and Repeater Stations Manuals: 68P81025E50-G (12W to 75W stations) and 68P81039E55-A (200W and 225W stations) Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Eric Lemmon Before cutting any traces, perhaps it would be a good idea to identify which backplane Mark has. If the jumpers are numbered differently than on the common TLN5644A backplane, it's probably wired quite differently. Since Mark described his repeater as being cobbled together from different machines, there may be some incompatibilities to consider. The Micor CA manual 6881025E60 assumes that the TLN5644A backplane is installed. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of ac6vj Sent: Sunday, July 27, 2008 12:43 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: UHF MICOR Unified Chassis Hi Mark: Pull the exciter board out and measure the resistance between pins one and five on the transmitter interconnect board. There should be infinite resistance between the two pins. If there is continuity between pins one and five on the transmitter interconnect board, cut the trace on the exciter board leading to pin five P902, see note 409 on the Exciter/1ST Bandpass Filter schematic pullout in the Micor Base and Repeater Station Manual 68P81025E60. Gregory AC6VJ
[Repeater-Builder] Re: UHF MICOR Unified Chassis
Mark, I agree with Eric, you are aways away from cutting and hacking on traces until we can identify exactly which backplane board you are working with. Most of the time that I have seen the TRN prefix, it usually has been tied to the PURC series of radios. Are all of your backplane boards that you have, this same model number? On the backplane board what are the cards slots labeled as? Knowing this information may help identify what the original station service type was. Joe - WA7JAW --- In Repeater-Builder@yahoogroups.com, n9wys [EMAIL PROTECTED] wrote: OK - I'm now home from work and have had an opportunity to look at the station. The backplane has the following number printed on it: TRN6421A Motorola parts identifies it as: BD INTCONN --- *This item has been cancelled This is all I can seem to find about it right now... And Eric, these are the manuals I currently have: Control and Applications Manuals: 68P81025E60-E and 68P81025E60-F MICOR Base and Repeater Stations Manuals: 68P81025E50-G (12W to 75W stations) and 68P81039E55-A (200W and 225W stations) Mark - N9WYS
[Repeater-Builder] Re: UHF MICOR Unified Chassis
Mark, I think Eric is correct in that you have got a community repeater chassis. These can be a handful to get properly jumpered and configured. If you can not find a TLN5644A backplane board, this will be a little more of a challenge. I think you are in a holding pattern here until your community repeater manual shows up. (I think I remember you saying you had one coming.) Then it will all become clear as mud and the pieces will start falling into place for you. I will go through my manuals tomorrow and verify what Eric and I are thinking. 73, Joe - WA7JAW --- In Repeater-Builder@yahoogroups.com, Eric Lemmon [EMAIL PROTECTED] wrote: Mark, With the capability to have 16 users, I am guessing that it is more likely to be a community repeater station than a PURC station. Of course, there may be components that are common to both. Since you already have the manuals you need for a basic Micor repeater, you might consider swapping the TRN6421A backplane for a standard TLN5644A backplane. That way, you can use readily-available modules, and not worry about finding new manuals. 73, Eric Lemmon WB6FLY
