Batboard

Hi I was given a micor with multiple power supplies, output pa's cards, manual everything i need basically to get it running however i need help in understanding what mods will i have to do to get this in to the 70cm band. I have read about the squelch gate 9 pin mod but I do not know what else there is for this I have two receivers also and both do not have a power supply in them but I they have 4 or 5 wires on a terminal strip on the left side of the receiver on the PCB board is that where they get the power from. any other help and recommendations would be great this is my second day digging into this and figuring it out I was told it will work and the parts work but it is up to me to put it together. my last question is where the crystals are for this so I can see what frequency it is on is it a card or is it inside somewhere thank you this is a 1984 Micor UHF and my first repeater.

kc9pos wrote:Hi I was given a micor with multiple power supplies, output pa's cards, manual everything i need basically to get it running however i need help in understanding what mods will i have to do to get this in to the 70cm band. I have read about the squelch gate 9 pin mod but I do not know what else there is for this I have two receivers also and both do not have a power supply in them but I they have 4 or 5 wires on a terminal strip on the left side of the receiver on the PCB board is that where they get the power from. any other help and recommendations would be great this is my second day digging into this and figuring it out I was told it will work and the parts work but it is up to me to put it together. my last question is where the crystals are for this so I can see what frequency it is on is it a card or is it inside somewhere thank you this is a 1984 Micor UHF and my first repeater.

First of all is this a base station or a repeater? There is a major difference in the 2.

Second question is what are your intentions for this radio? if it is a normal base radio and your planning on using it for a repeater, there are a number of changes that need to be done to the radio. it will also need to have a duplexer to allow the use of a single antenna.

You first stop might be to go over to the repeater builder site and do some serious reading there. Select the Motorola section and then find the area about Micor radios.

Jim

Hi here is a picture of it maybe you can tell if it is a base I know it is a repeater because I do have a set of duplexers for it for one antenna we will see if that picture will work if worse comes to worse
here is my Facebook photo album
http://www.facebook.com/media/set/?set= ... 087&type=3
you can check it out it has a station monitor I did not know there are two types anyways I read about modifying the squelch gate for a external controller also tuning the receiver for the ham band I have a bucket full of cards so I may leave it original and use them but everything is all wired and I have power to all the components but need help on what to do from here. the receiver I have a question with also there is no power supply but there are a set of wires on the pcb board on the back which i assume is where the power comes from.

here is the back of the receiver



here are the control cards i have so far put in

Thank you for all your help

High, 100 watt Micor station, probably UHF, tone remote control, with two Spectra Tac receivers below. There is a UHF duplexer near the bottom of the cabinet.

Get it running BEFORE you do any mods or hacks.....

Step one find out what is on the Chanel Element labels, that should tell you what frequency it is on.

well great news i have the channel elements and frequency and pl all figured out i put in the necessary cards and jumpers for it to work but after applying 120v it keys up and stays like that for a few minutes and one it comes back down i an unable to key it up form my ht i am testing this all in a dummy and i have the manual and extra cards i am able to transmit and hear my self out on my ht which is a good sign now it is time to figure out this 120v key up issue then receiver.

kc9pos wrote:well great news i have the channel elements and frequency and pl all figured out i put in the necessary cards and jumpers for it to work but after applying 120v it keys up and stays like that for a few minutes and one it comes back down i an unable to key it up form my ht i am testing this all in a dummy and i have the manual and extra cards i am able to transmit and hear my self out on my ht which is a good sign now it is time to figure out this 120v key up issue then receiver.

You say that you have it all figured out with frequency and PL. For the time being, you need to ignore the 2 Spectratac receivers. They should not be part of the normal system.

Did you take the covers off the transmitter exciter and the receiver to obtain the information you need. You should not have changed any jumpers until you had the rack up and running correctly as it was. The few photos you did supply, it looked like the rack was set up for repeater operation. The receiver would have a different receive frequency from the transmitter.

My second concern is that you stated the TX came up and hung there in TX for about a minute if I understood what you said. This is not normal. It should not have gone into TX with just applying power.

On the control shelf there should be a station control board way over to the right if I remember correctly. On that card, there is a manual slide switch that will allow you to manually key up the transmitter. It is spring loaded, so when you release it, it will go back to normal.

You need to get the rack functional before making any jumper changes.

Jim

Hi yea i found the TX frequency and RX frequency also the pl frequency. the only jumpers i checked were the ones needed Here is a quote from my friend who is helping me

"Tim:

First things first...... DO NOT, and I repeat DO NOT modify ANYTHING before you have a working MICOR repeater as Motorola designed it! I presume you have a FULL SET of MICOR manuals? If not you cant get too much done..... These are a MUST HAVE!

You need the following cards.... 1) SQUELCH GATE, 2) F1 CONTROL MODULE, 3) TIME OUT TIMER, 4) STATION CONTROL MODULE, 5) LINE DRIVER.

You must have the correct backplane in the unified chassis. Chassis number TCN 1187a, and a backplane of TLN6644a, are what I have.

The following jumpers MUST be "IN" on the backplane 1, 4, 5. The following must be out 2, 3, 6, 7, 8.

EVERYTHING is to be configured as an RT station, no wireline control.

Again Forget about any form of external control at all until it works a a factory built RT station.... DO NOT " OVERTHINK" things."

this is my base line where i started. I do not have the two receivers hooked up anymore. My setup right now it from top to bottom is PA, Exciter, Controls cards, Receiver, and power supply. I am NOT using any duplexers yet I have swiped out all of my cards and no matter what replacement i put in it hangs on tx and wont come down. I will post a video walking around it talking about it for other comments Thank you again for all your help

Go BACK to square one... check all the jumpers per the Motorola manual.

Look for mods or butcher changes, Get it back to stock first.....

Quick update so far Yes i do have a manual i have all the cards in needed but my unichassis is tcn 1190a and tln 5649a

my back board is tln 5644a I went with the factory settings as the manual says for (RT) with tone controlled pin settings 1 out, 2 out, 3 out, 4 out, 5 in, 6 out, 7 out, 8 out,
Time out timer is set for 1 min. squelch gate card has a jumper for PL set. one jumper 4 is out the repeater will not come up TXing but will transmit apon pressing the tx slide switch on the control board. can someone instruct me for a factory setup with the information i have im dead in the water.

well as far as today went I still would love to throw this thing threw my wall.
but it can here and receive with the PL disabled and the quality is clean also it can transmit with a clean signal. I pulled a few cards while it was running to see when the transmitting would stop because every time i apply 120v it stays in transmit and found this. One i remove the f1 pl card it stops and will receive and with that card reinstalled it will then stay in transmit and one i remove the line driver it will also switch to receive but as soon i reinstall the card it went to transmit. I also noticed when i removed the jumper 4 it will power up in receive but will not transmit on the station mic PTT switch or on the control card PTT switch everything is set in the various ways shown and explained in the manual. it is unified my chassis is tcn 1190a and tln 5649a

my board is tln 5644a those are the stamped numbers and i want it set up at RT

Thank you with this
I may have taken a step back currently my setup configuration from the top down and status is this

all the cards are out except the SCM.

i have a jumper from 7-11 for the line driver.

my jumper (1) configuration is here 1 in, 2 out, 3 out, 4 in, 5 in, 678 out. set as book for RA witch is repeater

(2)I will try it real quick for RT with PL..... set as is 1234 out, 5 in, 678 out.

I just finished and had no luck with both setups I had better results with receiver output with the second setup with a jumper from the original jumper on P/O J2 on pin 23 and 30.

I have a headset on pin 12, 1 on j4 I heard squelch and key up noise burst and with the second test I did (23 and 30 included) I herd my signal from my HT coming threw however no audio from the monitor spk and really quiet form my head set.

pins 2-14 are jumped for flpl.

12 and 1 on RX are my headset on J4

that is that end.. now with the TX at this point I still have my SCM in and no TX on slide switch the lamp lights when PL and Line are disabled. I followed the setup you gave me at this point I think it would be safe to assume that I need a controller of some sort to make this work further I would need to modify the squelch gate card or something I do not have any type of controller yet other then a Software based PC program I looked at. I will give you my list of equipment so far.


Chassis TLN5649A
BOARD TCN1190A
motorola micor uhf
RT PL ham repeater is my end goal great help from Steve Kometz <[email protected]>

Well I am really sorry for driving the group nuts with all my emails. I am trying to setup a RT station and still having no luck. I currently removed everything that I installed and am going back to square one how it says in the book I really need help threw this to get it to work.
Here is a list of all my equipment I currently have for this repeater:
Unichassis TCN1190A TLN5649A
Backplane TLN5644A
Power supply 1 TPN1110B ~OR ~ POWERSUPPLY2 TLN 52984, TPN 1106A
PA TLE1703A
Squelch gate (module not sure what number here is a list on the board 184002a or ab84e84362)
F1PL module TLN4638A2 and TLN4658A2
Station control mod TLN46S5B and also a TLN4635B and TLN4635B
Line driver TLN4668B2 and TLN4669B3
Audio control module TRN6080B6
4 user control TLN5804A and a TRN6166A and TRN6166A
Timeout timer TLN4635A1 and TRN8684A
PL control module TCN4050A2
4 Frequency module QLN5630A
Guard tone TLN4852A
Master decoder TRN5165A
DC transfer TLN4659A2
MANUAL Book schematics
RT (tone controlled) jumpers setting of currently (1234out) (5in) (678out)
Thank you again for all you help I don’t ask for you to do all the work but any experience on setting up with the equipment I have on had would be great
The transmitter and exciter do work and the receiver I notice has squelch on all the time for some reason I will see if it stops at some point but need to know what are the must have cards and jumpers for RT. Thank you all again. 

sounds and looks like you have a nice setup, i have a micor also i love these and enjoy working on them. You said on power up the tx keys at least you know your tx is working i would measure the output power and make sure its in specs first. Next, you said it receives so thats good to. By looking at your photo it looks like a community repeater with 4 different tones and 2 seperate recievers. First look at the station control module make sure PL disable switch is enabled, verify the proper tones in the tone cards make sure there correct. Next pull the squelch gate module make sure the hang time jumper is connected to the pins labled 2,4,8 these indicate how many seconds the tx will stay keyed after receiver pl indicate drops. There is also a setting of 0,,do not set it to this as the manual recommends not to if its a community repeater in which yours is. In the squelch gate module if the hang time jumper is not connected to anything just laying there it will cause the repeater to steady 'key' until it times out. I would go through the cards and make sure there jumpered correctly. These are fairly easy to work on once you get the hang of them. And they are rock solid, mine is UHF also and has the 75 watt PA, i had it keyed for 2 hours just the other day and it was not that hot and its showing 78 watts on my meter. Very very clean audio, sounds like simplex, they are awesome. When i aquired mine all it needed was the squelch gate and a little tuning of the audio and she was off. I had to repair the tripler but other than that its good to go for another 50 years unless lightning hits it. You got a nice machine, i wouldnt modify the squelch gate they sound so good factory, just add a com spec id-8 morse ider and be done with it. If you were closer i would help you but im in kansas. Good luck man, there cant be much wrong with it keep trying.73's KD0IUH