Re: Re: [Repeater-Builder] Compa Station Help

[Ron Wright]

Vern,

Yep you got a Micor...a mobile repackaged as a base station.

Might look at the PA.  The more transistors the higher the power.  The PA came 
in 45/60/110 W.  However, in this configuration if using for repeater turn down 
to maybe 50% rated power out.  This is adjusted with a pot in the Power Control 
Module, just to the right of the PA.  Also add a fan.

However, before you get started find what band split it is on.  It is VHF (can 
tell by the 5 inline helicals in the receiver), but need to know segment.  As 
another posting there were 3, 136-150, 150-160 and 160-174.  The 160-174 is 
useless for Ham.  Some trouble moving 150-160 down to 146, mainly with 
receiver.  Exciter and PA will most often tune with maybe 10% reduction in 
power.

The power supply is 25 Amp continuous duty Mot used in their 100 W repeaters.  
Very good power supply for this.

73, ron, n9ee/r




>From: [EMAIL PROTECTED]
>Date: 2008/03/28 Fri PM 08:01:23 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject: Re: [Repeater-Builder] Compa Station Help

>
>How about some pictures?  They are a little big and some 
>are redundant but hopefully it should give you guys some 
>idea of what I have.
>
>http://www.highwayusa.com/motorola/pict0001.jpg
>http://www.highwayusa.com/motorola/pict0002.jpg
>http://www.highwayusa.com/motorola/pict0003.jpg
>http://www.highwayusa.com/motorola/pict0004.jpg
>http://www.highwayusa.com/motorola/pict0005.jpg
>
>Vern
>
>On Fri, 28 Mar 2008 19:12:06 -0500 (CDT)
>  Ron Wright <[EMAIL PROTECTED]> wrote:
>> Vern,
>> 
>> Usually the easiest way to find what band and band 
>>segment it are on is to look at the Channel Elements, the 
>>small cans in the exciter and receiver.  They unplug.  A 
>>label on the top of the cans gives its frequency. 
>> However, to prevent them being put back on the same freq 
>>some pull the elements.  Most always one can get to them 
>>thru a panel behind the receiver.  Same with some 
>>exciters.
>> 
>> There were 3 ranges for VHF as someone stated.
>> 
>> Wonder what the heat sink looks like.  The continuous 
>>duty has large 17"w x 7h x 6 deep heat sink.  Otherwise 
>>it is built into the main chassis or is tube amp.
>> 
>> Mot made a number of variations of these.  They do make 
>>good repeaters.  Just takes some work.
>> 
>> One clue if it is a repeater and not a base station is 
>>the card cage usually has a "Squelch Gate" card.  This 
>>controls rx to tx keying.
>> 
>> I think others gave you lots of good info with the 
>>repeater builders site.
>> 
>> The power supply tells lots.  Might describe it.
>> 
>> 73, ron, n9ee/r
>> 
>> 
>> 
>>>From: [EMAIL PROTECTED]
>>>Date: 2008/03/28 Fri PM 01:19:10 CDT
>>>To: Repeater-Builder@yahoogroups.com
>>>Subject: [Repeater-Builder] Compa Station Help
>> 
>>>
>>>I have a Compa Station with the model number 
>>>C73RTB-1106C.
>>>
>>>I am looking for some help figuring out what this is 
>>>split, etc and how to make it into a repeater.
>>>
>>>First things first is that there is no power leads hooked 
>>>up except for the one to the control board box.  I can 
>>>see 
>>>where there are places for heavy cables from the power 
>>>supply to the transmitter.  Is there seperate power for 
>>>the receiver or does that come from the ribbon cable?
>>>
>>>How can I get this thing to key up to see what the TX 
>>>frequency is?  If I find out the TX freq can I sweep the 
>>>recv side with a freq generator to figure out where it 
>>>opens up?
>>>
>>>Are these crystal controlled or can they be adjusted to 
>>>get the right frequency pair?
>>>
>>>Thanks,
>>>Vern
>>> 
>>> 
>> 
>> 
>> Ron Wright, N9EE
>> 727-376-6575
>> MICRO COMPUTER CONCEPTS
>> Owner 146.64 repeater Tampa Bay, FL
>> No tone, all are welcome.
>> 
>> 
>
>   
> 


Ron Wright, N9EE
727-376-6575
MICRO COMPUTER CONCEPTS
Owner 146.64 repeater Tampa Bay, FL
No tone, all are welcome.

Re: [Repeater-Builder] Compa Station Help

[Milt]

Intermittent duty base station that has been robbed of parts.

No channel elements in the receiver, probably none in the transmitter.
No station control card.  No high current leads to the final.  As noted by 
earlier posts this is not a unit that will handle long periods of 
transmission.  Also no antenna relay (not that you need one for what you 
want to do).

Given the number of missing parts I would be very suspicious of the overall 
condition of the unit.

Milt
N3LTQ


- Original Message - 
From: <[EMAIL PROTECTED]>
To: 
Sent: Friday, March 28, 2008 9:01 PM
Subject: Re: [Repeater-Builder] Compa Station Help


> How about some pictures?  They are a little big and some
> are redundant but hopefully it should give you guys some
> idea of what I have.
>
> http://www.highwayusa.com/motorola/pict0001.jpg
> http://www.highwayusa.com/motorola/pict0002.jpg
> http://www.highwayusa.com/motorola/pict0003.jpg
> http://www.highwayusa.com/motorola/pict0004.jpg
> http://www.highwayusa.com/motorola/pict0005.jpg
>
>
> Vern
>
> On Fri, 28 Mar 2008 19:12:06 -0500 (CDT)
>  Ron Wright <[EMAIL PROTECTED]> wrote:
>> Vern,
>>
>> Usually the easiest way to find what band and band
>>segment it are on is to look at the Channel Elements, the
>>small cans in the exciter and receiver.  They unplug.  A
>>label on the top of the cans gives its frequency.
>> However, to prevent them being put back on the same freq
>>some pull the elements.  Most always one can get to them
>>thru a panel behind the receiver.  Same with some
>>exciters.
>>
>> There were 3 ranges for VHF as someone stated.
>>
>> Wonder what the heat sink looks like.  The continuous
>>duty has large 17"w x 7h x 6 deep heat sink.  Otherwise
>>it is built into the main chassis or is tube amp.
>>
>> Mot made a number of variations of these.  They do make
>>good repeaters.  Just takes some work.
>>
>> One clue if it is a repeater and not a base station is
>>the card cage usually has a "Squelch Gate" card.  This
>>controls rx to tx keying.
>>
>> I think others gave you lots of good info with the
>>repeater builders site.
>>
>> The power supply tells lots.  Might describe it.
>>
>> 73, ron, n9ee/r
>>
>>
>>
>>>From: [EMAIL PROTECTED]
>>>Date: 2008/03/28 Fri PM 01:19:10 CDT
>>>To: Repeater-Builder@yahoogroups.com
>>>Subject: [Repeater-Builder] Compa Station Help
>>
>>>
>>>I have a Compa Station with the model number
>>>C73RTB-1106C.
>>>
>>>I am looking for some help figuring out what this is
>>>split, etc and how to make it into a repeater.
>>>
>>>First things first is that there is no power leads hooked
>>>up except for the one to the control board box.  I can
>>>see
>>>where there are places for heavy cables from the power
>>>supply to the transmitter.  Is there seperate power for
>>>the receiver or does that come from the ribbon cable?
>>>
>>>How can I get this thing to key up to see what the TX
>>>frequency is?  If I find out the TX freq can I sweep the
>>>recv side with a freq generator to figure out where it
>>>opens up?
>>>
>>>Are these crystal controlled or can they be adjusted to
>>>get the right frequency pair?
>>>
>>>Thanks,
>>>Vern
>>>
>>
>>
>> Ron Wright, N9EE
>> 727-376-6575
>> MICRO COMPUTER CONCEPTS
>> Owner 146.64 repeater Tampa Bay, FL
>> No tone, all are welcome.
>>
>>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Compa Station Help

[mung]

How about some pictures?  They are a little big and some 
are redundant but hopefully it should give you guys some 
idea of what I have.

http://www.highwayusa.com/motorola/pict0001.jpg
http://www.highwayusa.com/motorola/pict0002.jpg
http://www.highwayusa.com/motorola/pict0003.jpg
http://www.highwayusa.com/motorola/pict0004.jpg
http://www.highwayusa.com/motorola/pict0005.jpg


Vern

On Fri, 28 Mar 2008 19:12:06 -0500 (CDT)
  Ron Wright <[EMAIL PROTECTED]> wrote:
> Vern,
> 
> Usually the easiest way to find what band and band 
>segment it are on is to look at the Channel Elements, the 
>small cans in the exciter and receiver.  They unplug.  A 
>label on the top of the cans gives its frequency. 
> However, to prevent them being put back on the same freq 
>some pull the elements.  Most always one can get to them 
>thru a panel behind the receiver.  Same with some 
>exciters.
> 
> There were 3 ranges for VHF as someone stated.
> 
> Wonder what the heat sink looks like.  The continuous 
>duty has large 17"w x 7h x 6 deep heat sink.  Otherwise 
>it is built into the main chassis or is tube amp.
> 
> Mot made a number of variations of these.  They do make 
>good repeaters.  Just takes some work.
> 
> One clue if it is a repeater and not a base station is 
>the card cage usually has a "Squelch Gate" card.  This 
>controls rx to tx keying.
> 
> I think others gave you lots of good info with the 
>repeater builders site.
> 
> The power supply tells lots.  Might describe it.
> 
> 73, ron, n9ee/r
> 
> 
> 
>>From: [EMAIL PROTECTED]
>>Date: 2008/03/28 Fri PM 01:19:10 CDT
>>To: Repeater-Builder@yahoogroups.com
>>Subject: [Repeater-Builder] Compa Station Help
> 
>>
>>I have a Compa Station with the model number 
>>C73RTB-1106C.
>>
>>I am looking for some help figuring out what this is 
>>split, etc and how to make it into a repeater.
>>
>>First things first is that there is no power leads hooked 
>>up except for the one to the control board box.  I can 
>>see 
>>where there are places for heavy cables from the power 
>>supply to the transmitter.  Is there seperate power for 
>>the receiver or does that come from the ribbon cable?
>>
>>How can I get this thing to key up to see what the TX 
>>frequency is?  If I find out the TX freq can I sweep the 
>>recv side with a freq generator to figure out where it 
>>opens up?
>>
>>Are these crystal controlled or can they be adjusted to 
>>get the right frequency pair?
>>
>>Thanks,
>>Vern
>>  
>> 
> 
> 
> Ron Wright, N9EE
> 727-376-6575
> MICRO COMPUTER CONCEPTS
> Owner 146.64 repeater Tampa Bay, FL
> No tone, all are welcome.
> 
> 

Re: [Repeater-Builder] Compa Station Help

[Ron Wright]

Vern,

Usually the easiest way to find what band and band segment it are on is to look 
at the Channel Elements, the small cans in the exciter and receiver.  They 
unplug.  A label on the top of the cans gives its frequency.  However, to 
prevent them being put back on the same freq some pull the elements.  Most 
always one can get to them thru a panel behind the receiver.  Same with some 
exciters.

There were 3 ranges for VHF as someone stated.

Wonder what the heat sink looks like.  The continuous duty has large 17"w x 7h 
x 6 deep heat sink.  Otherwise it is built into the main chassis or is tube amp.

Mot made a number of variations of these.  They do make good repeaters.  Just 
takes some work.

One clue if it is a repeater and not a base station is the card cage usually 
has a "Squelch Gate" card.  This controls rx to tx keying.

I think others gave you lots of good info with the repeater builders site.

The power supply tells lots.  Might describe it.

73, ron, n9ee/r



>From: [EMAIL PROTECTED]
>Date: 2008/03/28 Fri PM 01:19:10 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject: [Repeater-Builder] Compa Station Help

>
>I have a Compa Station with the model number C73RTB-1106C.
>
>I am looking for some help figuring out what this is 
>split, etc and how to make it into a repeater.
>
>First things first is that there is no power leads hooked 
>up except for the one to the control board box.  I can see 
>where there are places for heavy cables from the power 
>supply to the transmitter.  Is there seperate power for 
>the receiver or does that come from the ribbon cable?
>
>How can I get this thing to key up to see what the TX 
>frequency is?  If I find out the TX freq can I sweep the 
>recv side with a freq generator to figure out where it 
>opens up?
>
>Are these crystal controlled or can they be adjusted to 
>get the right frequency pair?
>
>Thanks,
>Vern
>   
> 


Ron Wright, N9EE
727-376-6575
MICRO COMPUTER CONCEPTS
Owner 146.64 repeater Tampa Bay, FL
No tone, all are welcome.

Re: Re: [Repeater-Builder] Compa Station Help

[Ron Wright]

I just received a Micor which is a B93RBC-3106-SP5.  It is one with the 2 tube 
final PA for 250 W.  The Micor is repackaged mobile type with what looks like a 
45 W PA and ribbon cable and very large power supply that powers the unit.  
They are on 154/155 MHz.

We got this and another with 2 set of Q202GC Sinclair duplexer, 4 cavity.

We are going to put one on for ARES/RACES with them providing the site, 
hopefully 400 ft above ground.

I really want to do away with the tube PA and run the 45 W PA at 30 watts.

The Florida Highway Patrol removed a number of these from service a year or so 
ago.  Two were given to our county.  They could have gotten more.  Think gone 
now.  I did see some on e-bay from someone near me.  Think he got the rest.

73, ron, n9ee/r




>From: Mike Morris WA6ILQ <[EMAIL PROTECTED]>
>Date: 2008/03/28 Fri PM 02:05:10 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject: Re: [Repeater-Builder] Compa Station Help

>
>At 11:19 AM 03/28/08, you wrote:
>>I have a Compa Station with the model number C73RTB-1106C.
>>
>>I am looking for some help figuring out what this is
>>split, etc and how to make it into a repeater.
>
>The 73RTB is a 90-100w intermittent duty (20 % duty
>cycle) Micor base built for the 136-174MHz frequency
>band.  An RCB would be continuous duty.
>The 1106 is a carrier squelch wireline controlled base.
>If it was a 3106 it would be PL.  Adding tone is a simple
>process once you get the parts.
>See the bottom half of this page:
><http://www.repeater-builder.com/micor/pix/micor-mobile-and-base-model-numbers.gif>
>
>And remember 20% is twenty seconds of transmit time
>every 100 seconds.  That's not to say that it won't
>transmit for 20 minutes, but it will get hot doing so.
>
>I do not recommend making an intermittent duty radio
>into a repeater unless:
>a) it's a learning experience (i.e. don't make it a
>prime repeater for an area).
>b) you have spares for when the PA deck will blow up.
>c) you run it at reduced power with some sort of
>thermostatic controlled cooling.
>
>The Micor series was built for a specific range of that band,
>such as 136-150, 150-162, 160-174.  I may not have the
>edge frequencies exact (all my manuals are in storage),
>but that's close.  If you have a high range radio, forget it.
>A 150-162 can be stretched, a low range is designed for
>2m.
>
>Look at the assemblies for a three letter / 4 digit number
>and then at this table -
><http://www.repeater-builder.com/rbtip/micorvhfboardnumbers.html>
>
>>First things first is that there is no power leads hooked
>>up except for the one to the control board box.  I can see
>>where there are places for heavy cables from the power
>>supply to the transmitter.  Is there seperate power for
>>the receiver or does that come from the ribbon cable?
>
>Ribbon cable?
>You must have a really old unit.  Most of the ones I've
>seen are the unified chassis system
>Look for any TxD numbers and let us know what they are.
>the x can be any letter, but most commonly will be R, T, or L.
>
>>How can I get this thing to key up to see what the TX
>>frequency is?
>
>Plug a microphone into the unit.
>
>>If I find out the TX freq can I sweep the
>>recv side with a freq generator to figure out where it
>>opens up?
>
>If the channel element is there it will have a frequnecy
>label on it.
>
>>Are these crystal controlled or can they be adjusted to
>>get the right frequency pair?
>
>A crystal is mounted in side a prepackaged oscillator, called
>a channel element.  See
><http://www.repeater-builder.com/micor/micor-element-info.html>
>If the elements are even there.
>
>>Thanks,
>>Vern
>
>More info here:
><http://www.repeater-builder.com/rbtip/micor-index.html>
>
>Mike
>
>   
> 


Ron Wright, N9EE
727-376-6575
MICRO COMPUTER CONCEPTS
Owner 146.64 repeater Tampa Bay, FL
No tone, all are welcome.

Re: [Repeater-Builder] Compa Station Help

[mung]

So this thing isn't worth anything for ham use with the 
exception of the power supply and cabinet?

Vern

On Fri, 28 Mar 2008 12:43:29 -0700
  "Eric Lemmon" <[EMAIL PROTECTED]> wrote:
> Vern,
> 
> The TRD1804BB is a receiver for the 162-174 MHz split.
> 
> 73, Eric Lemmon WB6FLY
> 
> 
> -Original Message-
>From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of 
>[EMAIL PROTECTED]
> Sent: Friday, March 28, 2008 12:18 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Compa Station Help
> 
> I would be sure to turn the power down and put a fan on 
>it 
> for repeater use. the heat sink on the beast is pretty 
> big though.
> 
> Numbers.
> TLD19428
> TRD1804BB
> TCN4727A
> 
> Does this mean that the tx is 142 - 150.8?
> 

Re: [Repeater-Builder] Compa Station Help

[mung]

I will see what other numbers I can find besides the ones 
I sent in the last email.

I do want to put it on 2m if possible.

Vern

On Fri, 28 Mar 2008 12:08:44 -0700
  "Eric Lemmon" <[EMAIL PROTECTED]> wrote:
> Vern,
> 
> You have an intermittent-duty Micor base station that is 
>equipped with a 110
> watt PA, carrier squelch, 1 TX and 1 RX channel, for 
>tone remote control.
> It does not have the additional filtering and shielding 
>that a repeater
> model comes with, but you may be able to manage without 
>them.  The power
> amplifier is also not intended for repeater service, 
>although it may work
> fine if throttled back in power and provided with a 
>cooling fan.
> 
> Your Micor station is crystal-controlled, using plug-in 
>devices called
> channel elements.  You don't need to power up the radio 
>to see what
> frequencies are used; simply remove the small access 
>plates on the back of
> the exciter and the receiver, and look at the frequency 
>printed on the
> channel element.  Since you have a base station, the 
>channel frequencies
> will probably be the same, even though the crystal 
>frequencies are
> different.  The transmit or "T" channel element should 
>be a KXN1019B, and
> the receive or "R" channel element should be a K1005A.
> 
> You should pull of the module covers and look for any 
>numbers stamped in
> black ink on the solder side of each board.  These 
>numbers identify what the
> board is and what bandsplit it operates in.  Look for 
>any numbers like
> TRDx, or TLDx, THNx, and so on.  Please 
>report back to this list
> what you find, and we can go from there.
> 
> You didn't say what band in which you wanted to use your 
>station, but if you
> plan to move it into the 2m Amateur band from a 
>commercial band, there is
> some work to do.  There is a wealth of material for 
>modifying Micor stations
> on the RBTIP at www.repeater-Builder.com
> 
> Very important:  Don't start any modifications UNTIL you 
>first verify that
> your station is working on its original frequencies! 
> Fix any problems
> first, verify that the station works perfectly, then 
>start making changes.
> 
> 73, Eric Lemmon WB6FLY
> 
> 
> -Original Message-
>From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of 
>[EMAIL PROTECTED]
> Sent: Friday, March 28, 2008 11:19 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Compa Station Help
> 
> I have a Compa Station with the model number 
>C73RTB-1106C.
> 
> I am looking for some help figuring out what this is 
> split, etc and how to make it into a repeater.
> 
>First things first is that there is no power leads hooked 
> up except for the one to the control board box. I can 
>see 
> where there are places for heavy cables from the power 
> supply to the transmitter. Is there separate power for 
> the receiver or does that come from the ribbon cable?
> 
> How can I get this thing to key up to see what the TX 
> frequency is? If I find out the TX freq can I sweep the 
> recv side with a freq generator to figure out where it 
> opens up?
> 
> Are these crystal controlled or can they be adjusted to 
> get the right frequency pair?
> 
> Thanks,
> Vern
> 
> 
> 
> 

RE: [Repeater-Builder] Compa Station Help

[Eric Lemmon]

Vern,

The TRD1804BB is a receiver for the 162-174 MHz split.

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Friday, March 28, 2008 12:18 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Compa Station Help

I would be sure to turn the power down and put a fan on it 
for repeater use. the heat sink on the beast is pretty 
big though.

Numbers.
TLD19428
TRD1804BB
TCN4727A

Does this mean that the tx is 142 - 150.8?

Re: [Repeater-Builder] Compa Station Help

[mung]

I would be sure to turn the power down and put a fan on it 
for repeater use.  the heat sink on the beast is pretty 
big though.

Numbers.
TLD19428
TRD1804BB
TCN4727A

Does this mean that the tx is 142 - 150.8?


On Fri, 28 Mar 2008 12:05:10 -0700
  Mike Morris WA6ILQ <[EMAIL PROTECTED]> wrote:
> At 11:19 AM 03/28/08, you wrote:
>>I have a Compa Station with the model number 
>>C73RTB-1106C.
>>
>>I am looking for some help figuring out what this is
>>split, etc and how to make it into a repeater.
> 
> The 73RTB is a 90-100w intermittent duty (20 % duty
> cycle) Micor base built for the 136-174MHz frequency
> band.  An RCB would be continuous duty.
> The 1106 is a carrier squelch wireline controlled base.
> If it was a 3106 it would be PL.  Adding tone is a 
>simple
> process once you get the parts.
> See the bottom half of this page:
> 
> 
> And remember 20% is twenty seconds of transmit time
> every 100 seconds.  That's not to say that it won't
> transmit for 20 minutes, but it will get hot doing so.
> 
> I do not recommend making an intermittent duty radio
> into a repeater unless:
> a) it's a learning experience (i.e. don't make it a
> prime repeater for an area).
> b) you have spares for when the PA deck will blow up.
> c) you run it at reduced power with some sort of
> thermostatic controlled cooling.
> 
> The Micor series was built for a specific range of that 
>band,
> such as 136-150, 150-162, 160-174.  I may not have the
> edge frequencies exact (all my manuals are in storage),
> but that's close.  If you have a high range radio, 
>forget it.
> A 150-162 can be stretched, a low range is designed for
> 2m.
> 
> Look at the assemblies for a three letter / 4 digit 
>number
> and then at this table -
> 
> 
>>First things first is that there is no power leads hooked
>>up except for the one to the control board box.  I can 
>>see
>>where there are places for heavy cables from the power
>>supply to the transmitter.  Is there seperate power for
>>the receiver or does that come from the ribbon cable?
> 
> Ribbon cable?
> You must have a really old unit.  Most of the ones I've
> seen are the unified chassis system
> Look for any TxD numbers and let us know what they are.
> the x can be any letter, but most commonly will be R, T, 
>or L.
> 
>>How can I get this thing to key up to see what the TX
>>frequency is?
> 
> Plug a microphone into the unit.
> 
>>If I find out the TX freq can I sweep the
>>recv side with a freq generator to figure out where it
>>opens up?
> 
> If the channel element is there it will have a frequnecy
> label on it.
> 
>>Are these crystal controlled or can they be adjusted to
>>get the right frequency pair?
> 
> A crystal is mounted in side a prepackaged oscillator, 
>called
> a channel element.  See
> 
> If the elements are even there.
> 
>>Thanks,
>>Vern
> 
> More info here:
> 
> 
> Mike
> 

RE: [Repeater-Builder] Compa Station Help

[Eric Lemmon]

Vern,

You have an intermittent-duty Micor base station that is equipped with a 110
watt PA, carrier squelch, 1 TX and 1 RX channel, for tone remote control.
It does not have the additional filtering and shielding that a repeater
model comes with, but you may be able to manage without them.  The power
amplifier is also not intended for repeater service, although it may work
fine if throttled back in power and provided with a cooling fan.

Your Micor station is crystal-controlled, using plug-in devices called
channel elements.  You don't need to power up the radio to see what
frequencies are used; simply remove the small access plates on the back of
the exciter and the receiver, and look at the frequency printed on the
channel element.  Since you have a base station, the channel frequencies
will probably be the same, even though the crystal frequencies are
different.  The transmit or "T" channel element should be a KXN1019B, and
the receive or "R" channel element should be a K1005A.

You should pull of the module covers and look for any numbers stamped in
black ink on the solder side of each board.  These numbers identify what the
board is and what bandsplit it operates in.  Look for any numbers like
TRDx, or TLDx, THNx, and so on.  Please report back to this list
what you find, and we can go from there.

You didn't say what band in which you wanted to use your station, but if you
plan to move it into the 2m Amateur band from a commercial band, there is
some work to do.  There is a wealth of material for modifying Micor stations
on the RBTIP at www.repeater-Builder.com

Very important:  Don't start any modifications UNTIL you first verify that
your station is working on its original frequencies!  Fix any problems
first, verify that the station works perfectly, then start making changes.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Friday, March 28, 2008 11:19 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Compa Station Help

I have a Compa Station with the model number C73RTB-1106C.

I am looking for some help figuring out what this is 
split, etc and how to make it into a repeater.

First things first is that there is no power leads hooked 
up except for the one to the control board box. I can see 
where there are places for heavy cables from the power 
supply to the transmitter. Is there separate power for 
the receiver or does that come from the ribbon cable?

How can I get this thing to key up to see what the TX 
frequency is? If I find out the TX freq can I sweep the 
recv side with a freq generator to figure out where it 
opens up?

Are these crystal controlled or can they be adjusted to 
get the right frequency pair?

Thanks,
Vern


 

Re: [Repeater-Builder] Compa Station Help

[Mike Morris WA6ILQ]

At 11:19 AM 03/28/08, you wrote:
>I have a Compa Station with the model number C73RTB-1106C.
>
>I am looking for some help figuring out what this is
>split, etc and how to make it into a repeater.

The 73RTB is a 90-100w intermittent duty (20 % duty
cycle) Micor base built for the 136-174MHz frequency
band.  An RCB would be continuous duty.
The 1106 is a carrier squelch wireline controlled base.
If it was a 3106 it would be PL.  Adding tone is a simple
process once you get the parts.
See the bottom half of this page:


And remember 20% is twenty seconds of transmit time
every 100 seconds.  That's not to say that it won't
transmit for 20 minutes, but it will get hot doing so.

I do not recommend making an intermittent duty radio
into a repeater unless:
a) it's a learning experience (i.e. don't make it a
prime repeater for an area).
b) you have spares for when the PA deck will blow up.
c) you run it at reduced power with some sort of
thermostatic controlled cooling.

The Micor series was built for a specific range of that band,
such as 136-150, 150-162, 160-174.  I may not have the
edge frequencies exact (all my manuals are in storage),
but that's close.  If you have a high range radio, forget it.
A 150-162 can be stretched, a low range is designed for
2m.

Look at the assemblies for a three letter / 4 digit number
and then at this table -


>First things first is that there is no power leads hooked
>up except for the one to the control board box.  I can see
>where there are places for heavy cables from the power
>supply to the transmitter.  Is there seperate power for
>the receiver or does that come from the ribbon cable?

Ribbon cable?
You must have a really old unit.  Most of the ones I've
seen are the unified chassis system
Look for any TxD numbers and let us know what they are.
the x can be any letter, but most commonly will be R, T, or L.

>How can I get this thing to key up to see what the TX
>frequency is?

Plug a microphone into the unit.

>If I find out the TX freq can I sweep the
>recv side with a freq generator to figure out where it
>opens up?

If the channel element is there it will have a frequnecy
label on it.

>Are these crystal controlled or can they be adjusted to
>get the right frequency pair?

A crystal is mounted in side a prepackaged oscillator, called
a channel element.  See

If the elements are even there.

>Thanks,
>Vern

More info here:


Mike