[Repeater-Builder] Success!

[Dave VanHorn]

I just got one of the newer Daniels MT-3 synthesized receivers over 
onto the 440 band.  

FWIW, here's what you have to do:

When you open the receiver, you'll see the preselector, which will need 
to be retuned. Do the obvious thing there, the best you can with the 
equipment you have.  DONT pump a lot of RF through this one, it's also 
the mixer!

The receiver uses an IF of 21.4 or 45.0 MHz, and can be set up for 12.5 
kHz or 25kHz. You'll see this in a pair of information jumpers on the 
bottom of the PCB, under the synthesizer (Huge can, can't miss it) 

1: Figure out the magic number to program into the switches:

The radio is natively a 16 channel radio. If you have more than one 
channel in it, that will be done by jumpers on the backplane, but the 
first channel is set by four switches, labeled MSB - - LSB  
You can't mess with the channel settings in EEPROM, but you CAN set the 
first channel to anything you like.

The formula is F = "Base" + (IF * Switches)  IF is either 12.5k or 25k 
Figuring out what base is can be a little tedious if you don't know 
what the receiver was set up for, but you can unscrew the cable out of 
the synth and run that to a counter or receiver and work out the proper 
settings.. For mine, 446.0 ends up at 1488 programmed to the switches.


Once you have the switch number, undo the retaining screws, and unplug 
the synth from the board. Remove the cover, and reinstall on the board.
Power up, and tune the small adjusting screw with a jeweler's 
screwdriver, till you see 3.5V on TP4 in the synth, then power down and 
reassemble the can, and put the synth back on the board.

At this point you can do final adjustments on the preselector, and set 
the squelch.  To set the squelch: R115 does hysteresys, and R88 does 
squelch level. Turn both way CCW, and start advancing R88 as you would 
a normal squelch control, then adjust R115 to prevent any jumping in 
and out.

So there it is for posterity.








 
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[Repeater-Builder] crackle in a repeater tower

[Ian Wells]

 Hi guys .Is there a way that you can locate loose bolts or fittings in a tower by having a transmitter txing on the tower and checking the tower with a spectrum anayzler with a beam for interference on other frequencies .I have a tower that crackles through VHF repeaters that are operating on the site and sometimes it affects uhf repeaters on site as well but i still havent found where it is coming from .It has to be something loose as it is worst on windy days any sugestions would be great 
 

Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au
 





















  




  
  
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Re: [Repeater-Builder] MTR 2000

[mch]

The UHF models that cover 470 MHz are 450-512 MHz and will not go into
the ham bands at all. T-band coverage in my area is a must. Same with
the 29.7-42, and 35-50 MHz models for 10M and 6M respectively.

As for your statements that:

 "In this respect, the low-band CDM and HT radios are not Ham friendly. 
However, I have a Motorola MaxTrac low-band mobile that covers 50-54 MHz
very well."

This seems to pretty well echo my original comment of "It seems ALL of
the newer Motorola units are not ham friendly."

Yes, I have Maxtracs on 10/6/2/440, but I would like to upgrade someday.

Joe M.

Eric Lemmon wrote:
> 
> Joe,
> 
> Don't be too hard on Motorola.  The Professional Series VHF-K handhelds
> (HT750, HT1250, HT1550) operate 136-174 MHz out of the box, and the UHF-R
> handhelds operate 403-470 MHz out of the box.  These operate over the
> complete 2m and 70cm bands, respectively, as well as the commercial bands,
> without any tuning or hacking required.  The Professional Series mobiles
> (CDM750, CDM1250, CDM1550) duplicate the same coverage as the handhelds.
> 
> I would like to be able to use a CDM mobile radio on 6m, but that is not
> possible.  The low-band "D" split CDM radio will cover 42-50 MHz very well,
> but it cannot be programmed one Hz above 50.000 MHz.  The interaction
> between the CPS software, the loaded firmware, and the masked CPU prevents
> hacking the radio out of band.  In this respect, the low-band CDM and HT
> radios are not Ham friendly.  However, I have a Motorola MaxTrac low-band
> mobile that covers 50-54 MHz very well.
> 
> My VHF and UHF conventional base stations are a CDM1550-LS and a
> CDM1550-LS+, respectively, and they have given me reliable service.  The
> ability to mute quietly (without a squelch crash) while receiving a signal
> from a non-Motorola system is one of the premium features of the
> Professional Series.  [It's called "non-standard reverse burst"]
> 
> Obligatory disclaimer: I'm not a Motorola dealer, and I don't have any
> financial interest in the company.
> 
> 73, Eric Lemmon WB6FLY
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of mch
> Sent: Tuesday, March 21, 2006 8:15 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] MTR 2000
> 
> It seems ALL of the newer Motorola units are not ham friendly. Has
> anyone been able to get a Pro Series portable 'out of band' yet?
> 
> Joe M.
> 
> Eric Lemmon wrote:
> >
> > The 900 MHz MTR2000 is a very specialized repeater.  It can receive only
> > 896-901 MHz, in 12.5 kHz steps, and can transmit only 935-940 MHz, in 12.5
> > kHz steps.  It cannot be programmed to operate outside these band limits.
> It
> > is an excellent machine (I have several VHF and UHF MTR2000s in service),
> > but the 900 MHz unit is definitely not Ham-friendly!
> >
> > 73, Eric Lemmon WB6FLY
> >
> > -Original Message-
> > From: Repeater-Builder@yahoogroups.com
> > [mailto:[EMAIL PROTECTED] On Behalf Of joecnic
> > Sent: Tuesday, March 21, 2006 12:57 PM
> > To: Repeater-Builder@yahoogroups.com
> > Subject: [Repeater-Builder] MTR 2000
> >
> > I am trying to put togather a 900MHz rptr in the ham band. What do I
> > have to do to get the MTR2000 to program in this split?  Also, I'm going
> > to use some MTX9000 portables on this system.  What do I have to do to
> > get these radios to program in this split also?  Any help would be
> > greatly appreciated.
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
>





 
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RE: [Repeater-Builder] Motorola CDM750 Mobile Tx Hang Time

[Eric Lemmon]

Duane,

If you're still stumped, e-mail me your codeplug.  I'll load it into a
CDM750 on this end to see if the symptom is in the programming or not.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Duane Hall
Sent: Tuesday, March 21, 2006 9:09 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Motorola CDM750 Mobile Tx Hang Time

Nothing is connected to the accy jack, other than a momentary switch to 
connect pins 3 (PTT) and 5 (Gnd) together for testing. The radio is 
transmitting into a dummy load via a double shielded jumper, and the 
supply voltage is well regulated.

I will read the radio tomorrow and make note of the firmware version. 
Will also locate a hand mic or make a test plug to key the radio via the 
mic jack.

Thanks for the suggestions.

Duane


Eric Lemmon wrote:

>Duane,
>
>I have a fleet of CDM750 radios in service, and have never seen this
>symptom.  I assume that when you say "...RICK out of the picture..." you
>mean that you have tried keying the radio into a dummy load with the
>RMN4025B hand microphone and on a known-good power supply, with nothing
>hooked to the rear accessory connector.  If the radio still hangs, then
>there is a possibility that a post-PTT signaling mode has been
inadvertently
>enabled.
>
>These problems sometimes occur in modular repeaters, if double-shielded
>cables are not used, when the signal leakage keeps the repeater keyed.  A
>poorly-regulated power supply is another suspect.  Of course, there may be
>something wrong with the radio itself.  I checked the SRN library, and
found
>no mention of either the problem or of a mod.  What firmware version is in
>the radio?  You can see this on the "Radio Information" page only when you
>read the radio, not from an archive file.
>
>73, Eric Lemmon WB6FLY
>
>
>-Original Message-
>From: Repeater-Builder@yahoogroups.com
>[mailto:[EMAIL PROTECTED] On Behalf Of Duane Hall
>Sent: Tuesday, March 21, 2006 1:22 PM
>To: Repeater-Builder@yahoogroups.com
>Subject: [Repeater-Builder] Motorola CDM750 Mobile Tx Hang Time
>
>I'm working on a CDR500 repeater, setup for unidirectional repeat. I'm
>trying to use it in a voted repeater system, but have run into a problem.
>The CDM mobile on the transmit side has nearly 1 second of hang time. Even
>with the RICK out of the picture, the transmitter is slow to drop. Is there
>a parameter in the radio programming that I'm missing? I messed with
>debounce and anything else I could find in the software with no luck. Is
>this the nature of the beast, or is there a hardware mod I need to do to
the
>radio?
>
>Thanks in advance!
>
>
>Duane Hall
>AB8QU
>
>
>
>
>
>
>
> 
>Yahoo! Groups Links
>
>
>
> 
>
>
>
>
>
>
>
>
>
> 
>Yahoo! Groups Links
>
>
>
> 
>
>
>
>
>  
>




 
Yahoo! Groups Links



 








 
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<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/Repeater-Builder/

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RE: [Repeater-Builder] MTR 2000

[Eric Lemmon]

Joe,

Don't be too hard on Motorola.  The Professional Series VHF-K handhelds
(HT750, HT1250, HT1550) operate 136-174 MHz out of the box, and the UHF-R
handhelds operate 403-470 MHz out of the box.  These operate over the
complete 2m and 70cm bands, respectively, as well as the commercial bands,
without any tuning or hacking required.  The Professional Series mobiles
(CDM750, CDM1250, CDM1550) duplicate the same coverage as the handhelds.

I would like to be able to use a CDM mobile radio on 6m, but that is not
possible.  The low-band "D" split CDM radio will cover 42-50 MHz very well,
but it cannot be programmed one Hz above 50.000 MHz.  The interaction
between the CPS software, the loaded firmware, and the masked CPU prevents
hacking the radio out of band.  In this respect, the low-band CDM and HT
radios are not Ham friendly.  However, I have a Motorola MaxTrac low-band
mobile that covers 50-54 MHz very well.

My VHF and UHF conventional base stations are a CDM1550-LS and a
CDM1550-LS+, respectively, and they have given me reliable service.  The
ability to mute quietly (without a squelch crash) while receiving a signal
from a non-Motorola system is one of the premium features of the
Professional Series.  [It's called "non-standard reverse burst"]

Obligatory disclaimer: I'm not a Motorola dealer, and I don't have any
financial interest in the company.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of mch
Sent: Tuesday, March 21, 2006 8:15 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] MTR 2000

It seems ALL of the newer Motorola units are not ham friendly. Has
anyone been able to get a Pro Series portable 'out of band' yet?

Joe M.

Eric Lemmon wrote:
> 
> The 900 MHz MTR2000 is a very specialized repeater.  It can receive only
> 896-901 MHz, in 12.5 kHz steps, and can transmit only 935-940 MHz, in 12.5
> kHz steps.  It cannot be programmed to operate outside these band limits.
It
> is an excellent machine (I have several VHF and UHF MTR2000s in service),
> but the 900 MHz unit is definitely not Ham-friendly!
> 
> 73, Eric Lemmon WB6FLY
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of joecnic
> Sent: Tuesday, March 21, 2006 12:57 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] MTR 2000
> 
> I am trying to put togather a 900MHz rptr in the ham band. What do I
> have to do to get the MTR2000 to program in this split?  Also, I'm going
> to use some MTX9000 portables on this system.  What do I have to do to
> get these radios to program in this split also?  Any help would be
> greatly appreciated.
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
>





 
Yahoo! Groups Links



 








 
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<*> To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]

<*> Your use of Yahoo! Groups is subject to:
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Re: [Repeater-Builder] Motorola CDM750 Mobile Tx Hang Time

[Duane Hall]

Nothing is connected to the accy jack, other than a momentary switch to 
connect pins 3 (PTT) and 5 (Gnd) together for testing. The radio is 
transmitting into a dummy load via a double shielded jumper, and the 
supply voltage is well regulated.

I will read the radio tomorrow and make note of the firmware version. 
Will also locate a hand mic or make a test plug to key the radio via the 
mic jack.

Thanks for the suggestions.

Duane


Eric Lemmon wrote:

>Duane,
>
>I have a fleet of CDM750 radios in service, and have never seen this
>symptom.  I assume that when you say "...RICK out of the picture..." you
>mean that you have tried keying the radio into a dummy load with the
>RMN4025B hand microphone and on a known-good power supply, with nothing
>hooked to the rear accessory connector.  If the radio still hangs, then
>there is a possibility that a post-PTT signaling mode has been inadvertently
>enabled.
>
>These problems sometimes occur in modular repeaters, if double-shielded
>cables are not used, when the signal leakage keeps the repeater keyed.  A
>poorly-regulated power supply is another suspect.  Of course, there may be
>something wrong with the radio itself.  I checked the SRN library, and found
>no mention of either the problem or of a mod.  What firmware version is in
>the radio?  You can see this on the "Radio Information" page only when you
>read the radio, not from an archive file.
>
>73, Eric Lemmon WB6FLY
>
>
>-Original Message-
>From: Repeater-Builder@yahoogroups.com
>[mailto:[EMAIL PROTECTED] On Behalf Of Duane Hall
>Sent: Tuesday, March 21, 2006 1:22 PM
>To: Repeater-Builder@yahoogroups.com
>Subject: [Repeater-Builder] Motorola CDM750 Mobile Tx Hang Time
>
>I'm working on a CDR500 repeater, setup for unidirectional repeat. I'm
>trying to use it in a voted repeater system, but have run into a problem.
>The CDM mobile on the transmit side has nearly 1 second of hang time. Even
>with the RICK out of the picture, the transmitter is slow to drop. Is there
>a parameter in the radio programming that I'm missing? I messed with
>debounce and anything else I could find in the software with no luck. Is
>this the nature of the beast, or is there a hardware mod I need to do to the
>radio?
>
>Thanks in advance!
>
>
>Duane Hall
>AB8QU
>
>
>
>
>
>
>
> 
>Yahoo! Groups Links
>
>
>
> 
>
>
>
>
>
>
>
>
>
> 
>Yahoo! Groups Links
>
>
>
> 
>
>
>
>
>  
>




 
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Re: [Repeater-Builder] MTR 2000

[mch]

It seems ALL of the newer Motorola units are not ham friendly. Has
anyone been able to get a Pro Series portable 'out of band' yet?

Joe M.

Eric Lemmon wrote:
> 
> The 900 MHz MTR2000 is a very specialized repeater.  It can receive only
> 896-901 MHz, in 12.5 kHz steps, and can transmit only 935-940 MHz, in 12.5
> kHz steps.  It cannot be programmed to operate outside these band limits. It
> is an excellent machine (I have several VHF and UHF MTR2000s in service),
> but the 900 MHz unit is definitely not Ham-friendly!
> 
> 73, Eric Lemmon WB6FLY
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of joecnic
> Sent: Tuesday, March 21, 2006 12:57 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] MTR 2000
> 
> I am trying to put togather a 900MHz rptr in the ham band. What do I
> have to do to get the MTR2000 to program in this split?  Also, I'm going
> to use some MTX9000 portables on this system.  What do I have to do to
> get these radios to program in this split also?  Any help would be
> greatly appreciated.
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
>





 
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[Repeater-Builder] Linking Suggestions

[k4ij]

Thanks to all who responded to my question concerning linking!

73
Mike K4IJ








 
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RE: [Repeater-Builder] MTR 2000

[Eric Lemmon]

The 900 MHz MTR2000 is a very specialized repeater.  It can receive only
896-901 MHz, in 12.5 kHz steps, and can transmit only 935-940 MHz, in 12.5
kHz steps.  It cannot be programmed to operate outside these band limits. It
is an excellent machine (I have several VHF and UHF MTR2000s in service),
but the 900 MHz unit is definitely not Ham-friendly!

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of joecnic
Sent: Tuesday, March 21, 2006 12:57 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] MTR 2000

I am trying to put togather a 900MHz rptr in the ham band. What do I 
have to do to get the MTR2000 to program in this split?  Also, I'm going 
to use some MTX9000 portables on this system.  What do I have to do to 
get these radios to program in this split also?  Any help would be 
greatly appreciated.









 
Yahoo! Groups Links



 








 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/Repeater-Builder/

<*> To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]

<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
 

RE: [Repeater-Builder] Motorola CDM750 Mobile Tx Hang Time

[Eric Lemmon]

Duane,

I have a fleet of CDM750 radios in service, and have never seen this
symptom.  I assume that when you say "...RICK out of the picture..." you
mean that you have tried keying the radio into a dummy load with the
RMN4025B hand microphone and on a known-good power supply, with nothing
hooked to the rear accessory connector.  If the radio still hangs, then
there is a possibility that a post-PTT signaling mode has been inadvertently
enabled.

These problems sometimes occur in modular repeaters, if double-shielded
cables are not used, when the signal leakage keeps the repeater keyed.  A
poorly-regulated power supply is another suspect.  Of course, there may be
something wrong with the radio itself.  I checked the SRN library, and found
no mention of either the problem or of a mod.  What firmware version is in
the radio?  You can see this on the "Radio Information" page only when you
read the radio, not from an archive file.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Duane Hall
Sent: Tuesday, March 21, 2006 1:22 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Motorola CDM750 Mobile Tx Hang Time

I'm working on a CDR500 repeater, setup for unidirectional repeat. I'm
trying to use it in a voted repeater system, but have run into a problem.
The CDM mobile on the transmit side has nearly 1 second of hang time. Even
with the RICK out of the picture, the transmitter is slow to drop. Is there
a parameter in the radio programming that I'm missing? I messed with
debounce and anything else I could find in the software with no luck. Is
this the nature of the beast, or is there a hardware mod I need to do to the
radio?

Thanks in advance!


Duane Hall
AB8QU







 
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<*> To visit your group on the web, go to:
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<*> To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]

<*> Your use of Yahoo! Groups is subject to:
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RE: [Repeater-Builder] Vertex VXR-5000

[Eric Lemmon]

Mike,

CSC (Control Signal Corporation) is very much in business.  You can purchase
an instruction manual from CSC, along with the PROM.  The CWID-51B Automatic
Station Identifier is a reliable and flexible unit, and the only down side
of it is the requirement for a custom-programmed PROM.  I doubt that CSC
would have interface information for a VXR-5000 repeater, since the external
interface connector is straightforward, and the manual covers all of the
pinouts.

Dunno anything about the MSF5000 repeater; I'm an MTR2000 fan.

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Michael Antoine
Sent: Tuesday, March 21, 2006 4:01 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Vertex VXR-5000


 Hi group,

 Have two repeater problems to figure out. I am trying to
 add a CWID 51B (CSC) to a Vertex VXR-5000 440 repeater,
 looking for application notes for it.  Sent an email to CSC
 no luck yet, also need to change ID to my Call sign, IC still
 available, anyone know??
 

 Have a MSF-5000 GMRS repeater that been in my attic unplugged
 for a couple of years, would like to get back on the air 
 again, plugged it in, only TEST lights come, won't key up
 with a handheld near by,
 
 Any ideas out there?

  Mike A   N1KTD






 
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Re: [Repeater-Builder] cable tv hardline loss question

[Kevin Custer]

Right...

Also keep in mind that 75 ohm cable has a lesser amount of loss for the
same size cable as 50 ohm.  
And, for receive only systems, matching isn't quite as important.  
And, matching transformers are easily built, for other terminal
impedances.  
And, cabling lengths can be substituted for the stubs, for impedance
matching.  
And, 75 ohm cable can be obtained, many times, for nothing.  
And, if jacketed, works in duplex service as well as any other coax.

Someone wrote:

  
  
  
  Keep in mind that cable TV coax is 75 ohm stuff.















  




  
  
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Re: [Repeater-Builder] cable tv hardline loss question

[Dick]

Keep in mind that cable TV coax is 75 ohm stuff.
 
Dick W1NMZ
 
- Original Message - 
From: tony 
dinkel 
To: Repeater-Builder@yahoogroups.com 

Sent: 20 March, 2006 17:23
Subject: [Repeater-Builder] cable tv hardline loss 
question
Can someone estimate for me, the approximate loss of typical half 
inch cable TV hard line at 450 
mHz?tnxtdwb6mie Yahoo! 
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[Repeater-Builder] Re: Can anyone identify this?

[thoraldus]

--- In Repeater-Builder@yahoogroups.com, "Eric Lemmon" <[EMAIL PROTECTED]> 
wrote:
>
> Rick,
> 
> The front view shows the PA board, which confirms that your Micor is
a 60
> watt, intermittent duty base station, with a non-unified chassis. 
[snip]

Eric,

I want to thank you and all the other posters for your feedback on my
query. You all have given valuable information to help me go forward
with this project. It will probably be a few weeks before I start
tearing things apart on this system so I'm sure I'll be back then with
more detailed enquiries.

73,
Rick AE7RS








 
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[Repeater-Builder] Vertex VXR-5000

[Michael Antoine]

 Hi group,

 Have two repeater problems to figure out, I am trying to
 add an CWID 51B (CSC) to a Vertex VXR-5000 440 repeater,
 looking for apllication notes for it. Sent an email to CSC
 no luck yet, also need to change ID to my Call sign, IC still
 available, anyone know??
 

 Have a MSF-5000 GMRS repeater that been in my attic unplugged
 for a couple of years, would like to get back on the air 
 again, plugged it in, only TEST lights come, won't key up
 with a handheld near by,
 
 Any ideas out there

  Mike A   N1KTD








 
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Re: [Repeater-Builder] MTR 2000

[Mike Morris]

At 12:57 PM 03/21/06, you wrote:
>I am trying to put togather a 900Mhz rptr in the ham band. What do I
>have to do to get the MTR2000 to program in this split. Also I'm going
>to use some MTX9000 portables on this system what do I have to do to
>get theese radios to program in this split also. Any help would be
>greatly appreciated.

Check out the AR902 group on Yahoogroups.  All 900mhz, any brand.
Lots of knowledgeable tech guys there.

Mike






 
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RE: [Repeater-Builder] MTR 2000

[Mike Perryman]

Have you looked on the Batlabs site?
http://www.batlabs.com/
 73
Mike Perryman
www.k5jmp.us


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of joecnic
Sent: Tuesday, March 21, 2006 3:57 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] MTR 2000


I am trying to put togather a 900Mhz rptr in the ham band. What do I 
have to do to get the MTR2000 to program in this split. Also I'm going 
to use some MTX9000 portables on this system what do I have to do to 
get theese radios to program in this split also. Any help would be 
greatly appreciated.









 
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[Repeater-Builder] Motorola CDM750 Mobile Tx Hang Time

[Duane Hall]

I'm working on a CDR500 repeater, setup for unidirectional repeat. I'm
trying to use it in a voted repeater system, but have ran into a problem.
The CDM mobile on the transmit side has nearly 1 second of hang time. Even
with the RICK out of the picture, the transmitter is slow to drop. Is there
a parameter in the radio programming that I'm missing? I messed with
debounce and anything else I could find in the software with no luck. Is
this the nature of the beast, or is there a hardware mod I need to do to the
radio?

Thanks in advance!


Duane Hall
AB8QU







 
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[Repeater-Builder] MTR 2000

[joecnic]

I am trying to put togather a 900Mhz rptr in the ham band. What do I 
have to do to get the MTR2000 to program in this split. Also I'm going 
to use some MTX9000 portables on this system what do I have to do to 
get theese radios to program in this split also. Any help would be 
greatly appreciated.









 
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[Repeater-Builder] Re: Switching PL on and of on a TS-32

[skipp025]

Off the decafe Doug,  :-) 

I looked at the circuit for methods to mute the ctcss 
encoder output using a portion of low pass filter 
section U3A.

[paste]
> Use a small (low cost - high preformance) fet like 
> the 2N7000 or the same VN10KM (also VN10LP) (same fet, 
> just a different part number) with a low on-resistance 
> to mute the audio output line to ground at some place 
> like the junction of U3A parts R35-C21 

You could control the fet with the output status of 
the decoder, but using a cos/cor input would allow you 
to also control the encoder in carrier squelch repeater 
operation. More inovative types could set up a cos and/or 
ctcss decode control. 

Grounding the input to the U3A filter at the junction of 
parts R26-R27 & C20 will also work if you can be sure 
the fet or optional transistor takes the output to very 
near ground (to prevent ctcss leakage through U3A). 

> Ground one of the mentioned locations when cos or 
> encoder detected output changes and the encoder output 
> should halt.

For the new to using small fet people, you should provide 
two resistors, a capacitor and a diode to the fet gate 
lead. A series 2.7k min value 1/4 watt resistor to input 
to the fet gate, call it "gate solder junction A".  At 
the gate junction A position, solder a 470K resistor from 
the gate junction to ground, which is also where the fet 
source lead is soldered. 

Parallel both a 1N914/1N4148 diode and a 220pf disc capacitor 
with the 470k 1/4 watt resistor, the banded end of the diode 
(cathode) pointing up/connecting to the gate junction A. 

The resistors isolate and protect the fet, the diode prevents 
excess fet gate reverse voltage (mistakes) and the 220pf cap 
will help keep stray rf off the gate.   The fet drain lead 
is soldered to your choice of locations mentioned above in 
the ts-32 board.  My first choice might be the junction of 
U3A parts R35-C21. 

Small signal switching transistors also work ok, but you need 
to ensure they switch on and off 100%. 

cheers,
skipp 

> Doug Bade <[EMAIL PROTECTED]> wrote:
> Cancel that remark NO PTT on that board.. I was off on that 
> comment... one of the other boards. grrr.. I went and 
> looked at the schematic.. The factory app note used a clamping diode 
> or transistor maybe on the encoder side of the circuit on board of 
> the ts32 at the network in front of the op amp.  It looks like it 
> would yield about the same results as the clamping transistor.. it 
> was just on board the ts32 instead...
> I recall it was tied to the output transistor as noted below... that 
> part was correct
> Doug
> 
> 
> At 01:47 PM 3/21/2006, you wrote:
> >The PTT input of the ts-32 controls encode If it is 
> >connected to your rx mute gate it would track carrier 
> >input The factory recommendation Coy referred to as 
> >I recall was for gating tx tone off rx tone, which was 
> >connecting OUT 1 or 2 ( whichever is the correct
> >polarity) to the ptt input of the board. This allows 
> >encode to track decode, and does so very well but ..
> >..if you are in carrier sq mode, would not ever encode 
> >.. Connecting ts-32 ptt input to station rx mute or 
> >an inverter ( or something on the squelch gate for
> >other vendors besides GE) if needed solves the problem.
> >Doug 










 
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Re: [Repeater-Builder] Re: Switching PL on and of on a TS-32

[Jim B.]

Bob M. wrote:
> I thought I saw a PTT Input line on the TS32. When
> this is grounded, PL is generated and the PTT Output
> line goes low. When the PTT Input line is released,
> the reverse burst is sent and PTT Output is released.
> The unit will not generate PL until the PTT Input line
> is grounded again.
> 
> Won't this control the PL encode on/off?
> 
> Bob M.

The TS-32 does not have reverse burst. You're thinking of the TS-64, 
which does what you describe.

-- 
Jim Barbour
WD8CHL





 
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Re: [Repeater-Builder] Re: Switching PL on and of on a TS-32

[Bob M.]

I thought I saw a PTT Input line on the TS32. When
this is grounded, PL is generated and the PTT Output
line goes low. When the PTT Input line is released,
the reverse burst is sent and PTT Output is released.
The unit will not generate PL until the PTT Input line
is grounded again.

Won't this control the PL encode on/off?

Bob M.
==
--- skipp025 <[EMAIL PROTECTED]> wrote:

> If ComSpec has a different method, please share it 
> with us. 
> 
> "Soup for you..!" 
> 
> cheers,
> skipp 
> 
> > [EMAIL PROTECTED] wrote:
> > Sounds like good advice, thanks.
> > Joe
> > 
> >  Coy Hilton <[EMAIL PROTECTED]> wrote: 
> > > Call ComSpec tech support. They will tell you
> how to do it the right 
> > > way. They told me but, I forgot or lost the
> paper that I wrote it 
> > > down on.
> > > 
> > > AC0Y 
> > > 
> 
> 
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> [EMAIL PROTECTED]
> 
>  
> 
> 
> 
> 


__
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 




 
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Re: [Repeater-Builder] Stumped.. Need help with problem.

[steve]

Hi
thanks for the info, Iam a little wiser now

Steve
- Original Message -
From: "Jay Urish" <[EMAIL PROTECTED]>
To: 
Sent: Tuesday, March 21, 2006 6:52 PM
Subject: Re: [Repeater-Builder] Stumped.. Need help with problem.


> General Mobile Radio Service.. Its kinda like Citizens Band.
> Land Mobile Radio Service is what business use and police agencies etc..
>
> steve wrote:
> > Hi
> > being in the UK could you tell me what GMRS, LMRS
> > mean
> >
> > Thanks
> >
> > Steve
> > - Original Message -
> > From: "Jay Urish" <[EMAIL PROTECTED]>
> > To: 
> > Sent: Tuesday, March 21, 2006 6:09 PM
> > Subject: Re: [Repeater-Builder] Stumped.. Need help with problem.
> >
> >
> >> Why not just a real repeater in the LMRS spectrum? Thats what we are
> >> doing here in Flower Mound.. Http://www.fmcert.info
> >>
> >> Its easy. 600bucks for the coordination
> >> hamstring them.
> >>
> >> Anthony L .Ferguson wrote:> >
> >> --
> >> Jay UrishNetwork Administrator
> >> Unixwolf Enterprises LLC.
> >> http://www.unixwolf.net
> >> 972.691.0125972.965.6229
> >>
> >>
> >>
> >>
> >>
> >> Yahoo! Groups Links
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> --
> >> No virus found in this incoming message.
> >> Checked by AVG Free Edition.
> >> Version: 7.1.385 / Virus Database: 268.2.6/286 - Release Date: 20/03/06
> >>
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
>
> --
> Jay Urish W5GM
> ARRL Life Member Denton County ARRL VEC
> TXFCA President N5ERS VP/Trustee
> DCARA President Denton County ARES AEC
>
> Monitoring 444.850 PL-88.5 146.92 PL-110.9
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.385 / Virus Database: 268.2.6/287 - Release Date: 21/03/06
>




 
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[Repeater-Builder] Re: More (mostly) free stuff.

[ldgelectronics]

Thanks for all the responses, everything is spoken for.

Dwayne Kincaid
WD8OYG

<[EMAIL PROTECTED]> wrote:
>
> Hi folks. More cleaning and more (mostly) free stuff. Contact me 
off 
> the list to make arrangements.
> 
> Three UHF (440 to 470 MHz) band pass cavity. About 19" high and 
5.5" 
> diameter. UHF connectors, no adjustments except pass freq. Looks to 
> have a about 0.75 db loss per can. One can has a split at the seam 
but 
> could be soldered back with a propane torch (or really big iron). 
$10 
> to ship each or $25 for all three.
> 
> ComSpec TS-32P. Pulled from working unit, but no longer needed. $5 
to 
> ship.
> 
> I still have a handful of the LM386 audio PC boards. Get 5 for $1 
for 
> shipping.
> 
> Dwayne Kincaid
> WD8OYG
>









 
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Re: [Repeater-Builder] Re: Switching PL on and of on a TS-32

[Doug Bade]

Cancel that remark NO PTT on that board.. I was off on that 
comment... one of the other boards. grrr.. I went and 
looked at the schematic.. The factory app note used a clamping diode 
or transistor maybe on the encoder side of the circuit on board of 
the ts32 at the network in front of the op amp.  It looks like it 
would yield about the same results as the clamping transistor.. it 
was just on board the ts32 instead...
I recall it was tied to the output transistor as noted below... that 
part was correct

Doug


At 01:47 PM 3/21/2006, you wrote:
>The PTT input of the ts-32 controls encode If it is connected to
>your rx mute gate it would track carrier input The factory
>recommendation Coy referred to as I recall was for gating tx tone off
>rx tone, which was connecting OUT 1 or 2 ( whichever is the correct
>polarity) to the ptt input of the board. This allows encode to track
>decode, and does so very well but if you are in carrier sq
>mode, would not ever encode.. Connecting ts-32 ptt input to
>station rx mute or an inverter ( or something on the squelch gate for
>other vendors besides GE) if needed solves the problem.
>
>Doug
>






 
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RE: [Repeater-Builder] More (mostly) free stuff.

[Mike Perryman]

I will take all 3 UHF cans..  if they are still available
 73
Mike Perryman
www.k5jmp.us


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of ldgelectronics
Sent: Tuesday, March 21, 2006 1:56 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] More (mostly) free stuff.


Hi folks. More cleaning and more (mostly) free stuff. Contact me off 
the list to make arrangements.

Three UHF (440 to 470 MHz) band pass cavity. About 19" high and 5.5" 
diameter. UHF connectors, no adjustments except pass freq. Looks to 
have a about 0.75 db loss per can. One can has a split at the seam but 
could be soldered back with a propane torch (or really big iron). $10 
to ship each or $25 for all three.

ComSpec TS-32P. Pulled from working unit, but no longer needed. $5 to 
ship.

I still have a handful of the LM386 audio PC boards. Get 5 for $1 for 
shipping.

Dwayne Kincaid
WD8OYG









 
Yahoo! Groups Links



 






 
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[Repeater-Builder] More (mostly) free stuff.

[ldgelectronics]

Hi folks. More cleaning and more (mostly) free stuff. Contact me off 
the list to make arrangements.

Three UHF (440 to 470 MHz) band pass cavity. About 19" high and 5.5" 
diameter. UHF connectors, no adjustments except pass freq. Looks to 
have a about 0.75 db loss per can. One can has a split at the seam but 
could be soldered back with a propane torch (or really big iron). $10 
to ship each or $25 for all three.

ComSpec TS-32P. Pulled from working unit, but no longer needed. $5 to 
ship.

I still have a handful of the LM386 audio PC boards. Get 5 for $1 for 
shipping.

Dwayne Kincaid
WD8OYG









 
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Re: [Repeater-Builder] Stumped.. Need help with problem.

[Jay Urish]

General Mobile Radio Service.. Its kinda like Citizens Band.
Land Mobile Radio Service is what business use and police agencies etc..

steve wrote:
> Hi
> being in the UK could you tell me what GMRS, LMRS
> mean
> 
> Thanks
> 
> Steve
> - Original Message - 
> From: "Jay Urish" <[EMAIL PROTECTED]>
> To: 
> Sent: Tuesday, March 21, 2006 6:09 PM
> Subject: Re: [Repeater-Builder] Stumped.. Need help with problem.
> 
> 
>> Why not just a real repeater in the LMRS spectrum? Thats what we are 
>> doing here in Flower Mound.. Http://www.fmcert.info
>>
>> Its easy. 600bucks for the coordination 
>> hamstring them.
>>
>> Anthony L .Ferguson wrote:> > 
>> --
>> Jay UrishNetwork Administrator
>> Unixwolf Enterprises LLC.
>> http://www.unixwolf.net
>> 972.691.0125972.965.6229
>>
>>
>>
>>
>>  
>> Yahoo! Groups Links
>>
>>
>>
>>  
>>
>>
>>
>>
>>
>> -- 
>> No virus found in this incoming message.
>> Checked by AVG Free Edition.
>> Version: 7.1.385 / Virus Database: 268.2.6/286 - Release Date: 20/03/06
>>
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 

--
Jay Urish W5GM
ARRL Life MemberDenton County ARRL VEC
TXFCA President N5ERS VP/Trustee
DCARA President Denton County ARES AEC

Monitoring 444.850 PL-88.5 146.92 PL-110.9




 
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Re: [Repeater-Builder] Stumped.. Need help with problem.

[radio5000]

Hopefully this is close...
 
General Mobile Radio Service. Non business, every user/household has to 
have a license. React uses this. (Radio Emergency Action Team, they are a 
volunteer organization.)
 
 
Land Mobile Radio Service.  Basically business radio. Only the 
Licensee of the Frequency is required to have a license. Hope that helps, 
somebody else probably can give you a better answer though.
 
[EMAIL PROTECTED] writes:
Hibeing in the UK could you tell me what GMRS, 
  LMRSmeanThanksSteve

 













  




  
  
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Re: [Repeater-Builder] Re: Switching PL on and of on a TS-32

[Doug Bade]

The PTT input of the ts-32 controls encode If it is connected to 
your rx mute gate it would track carrier input The factory 
recommendation Coy referred to as I recall was for gating tx tone off 
rx tone, which was connecting OUT 1 or 2 ( whichever is the correct 
polarity) to the ptt input of the board. This allows encode to track 
decode, and does so very well but if you are in carrier sq 
mode, would not ever encode.. Connecting ts-32 ptt input to 
station rx mute or an inverter ( or something on the squelch gate for 
other vendors besides GE) if needed solves the problem.

Doug




At 01:23 PM 3/21/2006, you wrote:
> > Call ComSpec tech support. They will tell you how to
> > do it the right way.
>
>Unless there is some place better that I don't see in
>the ts-32 circuit... the encode mute method I mentioned
>(as shown below) is a "right way".
>
> > They told me but, I forgot or lost the paper that
> > I wrote it down on.
> > "Coy Hilton" <[EMAIL PROTECTED]> wrote:
> > ACOY
>
>Bad Coy..!  No soup for you..!






 
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[Repeater-Builder] Re: Carrier Operated Relay (COR)

[skipp025]

You could use the speaker output, but it would be level sensitive
based on the volume control position.  I have a nice vox cor/cos
circuit here I can scan and send you, but you need to send me an 
email direct so I can see your full email reply address. Yahoo 
removes the domain part of email addresses as read on the web for 
anti spam protection. 

your turn... 
skipp 


> "Zakaria Dahili" <[EMAIL PROTECTED]> wrote: 
> Hi Skipp,
> I just want to take from the speaker output of the RX radio, and 
> feed it to the COR cicuit so that I could activate the PTT on the 
> transmit radio, could you help me with the circuit?
> 
> I prefer to use Motorola GP300
> 
> Thanks
> 9M2ZC


> --- In Repeater-Builder@yahoogroups.com, "skipp025"  
> wrote:
> >
> > Do you plan to open the radios up to add the cor 
> > circuit?  ...Or would/do you want to just use 
> > speaker audio output for (cor & repeat audio) 
> > everything?  Both methods are quite possible... 
> > using the speaker audio out is semi quirky but 
> > very easy to do. 
> > 
> > cheers,
> > skipp 
> > 
> > 
> > > "Zakaria Dahili"  wrote:
> > > HI All, I am new here. Can somebody help me with the circuit to 
> build 
> > > the above. What I have in mind is to use 2 Motorola handies and 
> > > convert it into a small repeater. I also need the circuit which 
> has a 
> > > delay "tail" of about 1.5 secs. Thanks. - de 9M2ZC
> > >
> >
>









 
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Re: [Repeater-Builder] Stumped.. Need help with problem.

[steve]

Hi
being in the UK could you tell me what GMRS, LMRS
mean

Thanks

Steve
- Original Message - 
From: "Jay Urish" <[EMAIL PROTECTED]>
To: 
Sent: Tuesday, March 21, 2006 6:09 PM
Subject: Re: [Repeater-Builder] Stumped.. Need help with problem.


> Why not just a real repeater in the LMRS spectrum? Thats what we are 
> doing here in Flower Mound.. Http://www.fmcert.info
> 
> Its easy. 600bucks for the coordination 
> hamstring them.
> 
> Anthony L .Ferguson wrote:> > 
> > 
> 
> --
> Jay UrishNetwork Administrator
> Unixwolf Enterprises LLC.
> http://www.unixwolf.net
> 972.691.0125972.965.6229
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 
> 
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.385 / Virus Database: 268.2.6/286 - Release Date: 20/03/06
> 




 
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[Repeater-Builder] Re: Switching PL on and of on a TS-32

[skipp025]

If ComSpec has a different method, please share it 
with us. 

"Soup for you..!" 

cheers,
skipp 

> [EMAIL PROTECTED] wrote:
> Sounds like good advice, thanks.
> Joe
> 
>  Coy Hilton <[EMAIL PROTECTED]> wrote: 
> > Call ComSpec tech support. They will tell you how to do it the right 
> > way. They told me but, I forgot or lost the paper that I wrote it 
> > down on.
> > 
> > AC0Y 
> > 








 
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[Repeater-Builder] Re: Switching PL on and of on a TS-32

[skipp025]

> Call ComSpec tech support. They will tell you how to 
> do it the right way. 

Unless there is some place better that I don't see in 
the ts-32 circuit... the encode mute method I mentioned 
(as shown below) is a "right way". 

> They told me but, I forgot or lost the paper that 
> I wrote it down on.
> "Coy Hilton" <[EMAIL PROTECTED]> wrote:
> ACOY 

Bad Coy..!  No soup for you..! 

:-) 
cheers,
skipp  


> 
> > "skipp025"  wrote:
> >
> > Hi Joe, 
> > 
> > > Joe  wrote:
> > > I decided to try the method someone suggested for 
> > > keying the repeater transmitter encode PL on and 
> > > off with active COS.  
> > 
> > A very popular function to have working when using 
> > remote IRLP or Echolink link radios. 
> > 
> > > I switched the ground connection on and off to key 
> > > the TS-32 PL deck.  
> > 
> > Not a good practice... 
> > 
> > > This works, except that when the tone turns off 
> > > I get a sound that is best described as "squeege" 
> > > as it shuts off.  I assume this is the oscillator 
> > > loosing voltage and the tone changing frequency.  
> > > Anybody else have this problem? 
> > 
> > There actually are/were tone burst circuits, which 
> > depended on the above mentioned operation. I've got 
> > some data sheets and circuit diagrams for them in 
> > my files. 
> > 
> > > I'm about to just go back to switching the PL 
> > > audio line and leaving the TS-32 on all the 
> > > time..
> > > 73, Joe, K1ike
> > 
> > Better to just leave power applied and mute the 
> > encoder output using a portion of low pass filter 
> > U3 circuit.  Use a small fet like the 2N7000 or 
> > the same VN10KM (also VN10LP) (same fet, different 
> > number) with a low on-resistance to mute the audio 
> > output line to ground at some place like the junction 
> > of U3A parts R35-C21 - or the input to the U3A filter 
> > atthe junction of parts R26-R27 & C20. 
> > 
> > Ground one of the mentioned locations when cos changes 
> > and the encoder output should halt. 
> > 
> > cheers, 
> > skipp
> >
>








 
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[Repeater-Builder] Re: Linking Suggestions Please

[skipp025]

Hi Mike, 

> > Here's the deal. I have two sites...Site one is where 
> > my 440 hub repeater is located. Site two is where I'm 
> > planning to put a 220 repeater. The distance between 
> > the two is about 20-30 yds.
> > I need to find a way to link the two together. 

Simple...
Find one 220 or 440 radio with both encode and decode 
ctcss and wire it as a remote base radio into one of the 
repeaters. Put it on a dummy load (termination) as enough 
tx and rx signal will probably be available at the site 
regardless of what you might think.  You can even turn 
the tx power down on the radio and still get a full quiet 
signal into the other repeater. 

cheers,
skipp 








 
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Re: [Repeater-Builder] Stumped.. Need help with problem.

[Jay Urish]

Why not just a real repeater in the LMRS spectrum? Thats what we are 
doing here in Flower Mound.. Http://www.fmcert.info

Its easy. 600bucks for the coordination and nobody has to worry about 
callsigns. On top of that, if the two Denton County jamming idiots 
decide to play with it, the Dallas field office is a lot more likely to 
hamstring them.

Anthony L .Ferguson wrote:
> Greetings! 
> 
> I'm stumped with something and hopefully with the aid of others I'll 
> be able to get this projected completed. This project belongs to 
> another who is very interested in repeaters and helping the community 
> in case of an emergency.
>  The owner has taken C.E.R.T. training and wishes to add to the 
> already existing communciation system in place by my self and others 
> who are Amateur Radio Operators and who own amateur repeaters.
> 
> The project is a message store and forward system for a Motorola 
> Maxar 80 UHF transciever. The controller that was purchased is an 
> NHRC 3+ with a simplex controller mode option , which is the main 
> reason for the purchase. 
> 
> The transciever has already been recrystaled for usage in the GMRS 
> Band. The owner has paid for the GMRS license. 
> 
> With all the History behind me. Here we go.
> 
> The transciever has been modified so connection could be done to a 
> patch panel or controller. 
> 1) Green -PTT
> 2) Grey - Ground
> 3) Orange -Delayed PTT
> 4) Brown - Mic Audio
> 5) Red  -  Discriminator Audio
> 6) Yellow - PL disable
> 7) Blue - Reciever PL detect Line
> 8) Shield -  Grnd  Radio Chassis
> 
> This is the information given by NHRC for the NHRC3+ controller.
> 
> 1&2 the same +13.8 volts 
> 3) CAS + carrier activated squelch
> 4) Fan control  ( not used ) 
> 5) PTT active Low
> 6) Ground
> 7) Tx audio to Txmitter
> 8) Ground / Tx Audio Return
> 9) Rx Audio (From reciever)
> 10) Ground / Rx audio Return
>  
> 
> Basically I'm trying to get the radio wired up to the controller so 
> the simplex repeater option can be used for the non Amateurs in the 
> area in case of an emergency .. 
> 
> I have some of these figured out .. but need help figuring what goes 
> where ?? I'm asking,  Please assist Thanks in advanced. 
> 73 DE KB4ZGO
> 
> 
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 

--
Jay UrishNetwork Administrator
Unixwolf Enterprises LLC.
http://www.unixwolf.net
972.691.0125972.965.6229




 
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[Repeater-Builder] Stumped.. Need help with problem.

[Anthony L .Ferguson]

Greetings! 

I'm stumped with something and hopefully with the aid of others I'll 
be able to get this projected completed. This project belongs to 
another who is very interested in repeaters and helping the community 
in case of an emergency.
 The owner has taken C.E.R.T. training and wishes to add to the 
already existing communciation system in place by my self and others 
who are Amateur Radio Operators and who own amateur repeaters.

The project is a message store and forward system for a Motorola 
Maxar 80 UHF transciever. The controller that was purchased is an 
NHRC 3+ with a simplex controller mode option , which is the main 
reason for the purchase. 

The transciever has already been recrystaled for usage in the GMRS 
Band. The owner has paid for the GMRS license. 

With all the History behind me. Here we go.

The transciever has been modified so connection could be done to a 
patch panel or controller. 
1) Green -PTT
2) Grey - Ground
3) Orange -Delayed PTT
4) Brown - Mic Audio
5) Red  -  Discriminator Audio
6) Yellow - PL disable
7) Blue - Reciever PL detect Line
8) Shield -  Grnd  Radio Chassis

This is the information given by NHRC for the NHRC3+ controller.

1&2 the same +13.8 volts 
3) CAS + carrier activated squelch
4) Fan control  ( not used ) 
5) PTT active Low
6) Ground
7) Tx audio to Txmitter
8) Ground / Tx Audio Return
9) Rx Audio (From reciever)
10) Ground / Rx audio Return
 

Basically I'm trying to get the radio wired up to the controller so 
the simplex repeater option can be used for the non Amateurs in the 
area in case of an emergency .. 

I have some of these figured out .. but need help figuring what goes 
where ?? I'm asking,  Please assist Thanks in advanced. 
73 DE KB4ZGO








 
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Re: [Repeater-Builder] cable tv hardline loss question

[Robin Midgett]

Approximately 3dB/100 feet. The 3/4" stuff is much better for 450 MHz.

At 07:23 PM 3/20/2006, you wrote:
>Can someone estimate for me, the approximate loss of typical half inch cable
>TV hard line at 450 mHz?
>
>tnx
>td
>wb6mie
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>

Thanks,
Robin Midgett K4IDC
615-322-5836 office - rolls to pager
615-835-7699 pager
615-301-1642 home
[EMAIL PROTECTED]
http://www.people.vanderbilt.edu/~robin.midgett/index.htm 





 
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Re: [Repeater-Builder] cable tv hardline loss question

[Robin Midgett]

Pardon my previous incorrect response..I was confused.


At 05:57 AM 3/21/2006, you wrote:
>tony dinkel wrote:
> > Can someone estimate for me, the approximate loss of typical half 
> inch cable
> > TV hard line at 450 mHz?
>
>CommScope .500 (1/2 inch) P3 cable is rated at 1.56 dB per 100 feet at
>68 degrees F.
>
>
>
>75 to 50 ohm transitions can be made by following this article:
>
>
>Kevin Custer
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>

Thanks,
Robin Midgett K4IDC
615-322-5836 office - rolls to pager
615-835-7699 pager
615-301-1642 home
[EMAIL PROTECTED]
http://www.people.vanderbilt.edu/~robin.midgett/index.htm 





 
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RE: [Repeater-Builder] FW: [rc210] Power sensor

[Jeff DePolo]

Don't have any of the Motorola power sensors, but I have a surplus of
Telewave and Decibel for various bands if anyone is interested.  N male to N
female, with RCA jacks for forward and reflected.  I know the Decibels have
adjusable pots for the forward/reflected output sample voltage, I forget if
the Telewaves do.

http://www.telewave.com/pdf/TWDS-3010.pdf  (this only shows 118-512 MHz, but
I have the lowband ones too)

http://www.dbspectra.com/products/decibel/DB8880Sensors.pdf

--- Jeff



_ 
From:   Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED]  On Behalf Of Mike Perryman K5JMP
Sent:   Monday, March 20, 2006 11:10 PM
To: Repeater-Builder@yahoogroups.com
Subject:[Repeater-Builder] FW: [rc210] Power sensor

Figured I would post it over here as well...

Other folks looking for Moto thru-line adapters on the RC-210
group...  anybody got excess thru-line adapters?

73
Mike
K5JMP
www.k5jmp.us

 -Original Message-
From:   [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] 
Sent:   Monday, March 20, 2006 11:03 PM
To: [EMAIL PROTECTED]
Subject:RE: [rc210] Power sensor

Mark,
Sorry...  Mike WA6ILQ has already asked for it.  Keep your eyes on
eBay...  they show up every once in a while.  Wish I had more of them to
share, but parts have been flying out of here pretty quick lately!! 

Could I interest anyone in a 1/4kW 6m PA of the GE variety? It will
be pick-up only in Stafford, VA. I may also have a 1/4 kW UHF /\/\oto
variety PA leaving if someone has something of interest to trade  I am
currently seeking 900 gear for a repeater.
73
Mike
K5JMP
www.k5jmp.us


-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf
Of
Mark Phillips
Sent: Monday, March 20, 2006 10:51 PM
To: [EMAIL PROTECTED]
Subject: Re: [rc210] Power sensor


How much for the HF one? I've a 6 mter machine I could use it on.

Mark

Mark, G7LTT/KC2ENI
Randolph, NJ
http://www.g7ltt.com


Mike Perryman K5JMP wrote:
> Paul,
>  
> I have 2 left...  one is 500-1000MHZ @ 50W (TRN5323A) currently
slated 
> for a 900 repeater, and one 25-100MHz @ 100W (no number on
low-band 
> unit).  I am willing to let go of the low-band unit, just sorry it

> doesn't fit your needs..  Keep an eye on the 'Bay..  they
generally go 
> pretty cheap. Sometimes you can find them in a rack panel
configuration 
> for around 70-100 bucks.  Then all you have to do is tap the
rotary 
> switch for the appropriate reading, and calibrate the RC-210
"meter face".
>  I guess I should have bid on the set (portable  meter and full 
> assortment of adapters) that I saw go past about 2 months ago.  I
recall 
> it went for less than 80 bucks for the whole shooting match.  You
might 
> also check on the repeater-builder list...  lots of
"/\/\oto-heads" over 
> there...
> Good luck,
> 
> 73
> Mike
> K5JMP
> www.k5jmp.us
> 


-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.385 / Virus Database: 268.2.5/284 - Release Date:
3/17/2006
 

-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.385 / Virus Database: 268.2.6/287 - Release Date: 3/21/2006
 





 
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[Repeater-Builder] CATV Cable rating

[tony dinkel]

Thanks for the link.  I do not know what it is but I need a ballpark figure 
to design around.  Its already installed but I have no idea what it is, I 
have not seen it yet.  Its for  a receiver link between two parts of a 
multicoupler between two buildings.  The run is around 500 feet.  I am 
figuring the resistives plus mismatch will put it about 10 dB deep.

Thanks,
td
wb6mie



You are probably asking for P3 CATV 500 cable.  It is about 1.5 dB at
450 MHz.

Go here
http://www.trilogycoax.com/pdf/catv/spec_sheets/mc2/MC2_500.pdf to
check out Trilogy 1/2" cable, which is air dielectric and has less
loss than foam.

This cable will work just fine for a RX application.

Shorty, K6JSI
San Diego






 
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[Repeater-Builder] Re: Motorola Micro 1?4 kilowatt Repeater

[ke4ovn]

>   The 2 tubes are Motorola 65-83382D02(RF parst list for $240 each)
>   There is a vent on back door to top of encloser.
>   Inside the vent is a heat sink.(No noticeable blower motor.)
>   I try POST the pics.
>   Aubrey
--- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote:
>
> 
>   The UHF I remember was 4CX250B's but that was earlier. 
> 
>   Neil 
> 
>  Original Message 
> From: [EMAIL PROTECTED]
> To: Repeater-Builder@yahoogroups.com
> Subject: RE: [Repeater-Builder] Re: Motorola Micro 1?4 kilowatt
> Repeater
> Date: Mon, 20 Mar 2006 18:33:15 -0800 (GMT-08:00)
> 
> >OK - I was sure my book shows a pair of 8560As for VHF. The UHF 
ones
> >we had used 8874s.
> >LJ
> >
> >
> >-Original Message-
> >>From: [EMAIL PROTECTED]
> >>Sent: Mar 20, 2006 4:34 PM
> >>To: Repeater-Builder@yahoogroups.com
> >>Subject: RE: [Repeater-Builder] Re: Motorola Micro 1?4 kilowatt
> >Repeater
> >>
> >>
> >>  Some do ... earlier ones do not ... except on UHF ??? 
> >>
> >>  Neil 
> >>
> >>
> >> Original Message 
> >>From: [EMAIL PROTECTED]
> >>To: Repeater-Builder@yahoogroups.com
> >>Subject: RE: [Repeater-Builder] Re: Motorola Micro 1?4 kilowatt
> >>Repeater
> >>Date: Mon, 20 Mar 2006 10:39:34 -0800 (GMT-08:00)
> >>
> >>>I thought these 1/4KW amps used 8560A tubes??
> >>>
> >>>-Original Message-
> From: [EMAIL PROTECTED]
> Sent: Mar 20, 2006 9:28 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: RE: [Repeater-Builder] Re: Motorola Micro 1?4 kilowatt
> >>>Repeater
> 
> 
>   I don't know about the later models but when I was servicing 
>  the 100 - 275 - 375 watt transmitters, careful maintenance of 
the
> >
>  blower motor was necessary.  When you determine the blower 
motor
>  seems to be slowing down ( lack of bearing lubrication? ) try 
>  that first.  
> 
>   If that doesn't do any good, then a trip to the local 
electric 
>  motor repair/rewind shop is necessary.  Early on, I used to 
take 
>  the entire motor to that shop - later years and since we had 
>  30-35 blower motors in various systems everywhere, I got to 
the 
>  point of disassembling the motor at our shop and taking the 
>  armature to the motor shop for a bearing change.  They had 
the 
>  bearing press, and the skill, we didn't.  
> 
>   Hope this helps / others probably have different ideas. 
> >Whatever 
>  works for you is best. 
> 
> 
>   In regards to the pair of 4CX250B's - those tubes require
> >serious
>  air circulation.  If the blower motor needs servicing, the 
air 
>  filter is dirty or the fins of the tubes are plugged with 
dirt, 
>  the tubes will have a very short life. 
> 
>   Remember, keep all contacts on that tube socket very clean, 
>  properly tensioned, for best performance and reliability. 
> 
>   Another item to be aware of is the 4CX250B filament voltage. 
> >The 
>  required filament voltage is 6.0 Volts (not 6.3 Volts) at 2.6 
>  amperes.  Absolute minimum heating time is 30 seconds.  
Careful 
>  attention to the correct filament voltage will give longer 
life 
>  than if you don't.  
> 
>   I am reading from the RCA loose-leaf lay-flat Vacuum Tube 
>  Engineering Manual.  
> 
>   The tube, properly installed, requires an air-system 
socket ... 
>  with the use of a ceramic chimney to direct the air coming
> >through 
>  the socket to pass through the plate cooling fins. 
> 
>   Hope this helps, 
> 
>   Neil - WA6KLA 
>  
> 
>  Original Message 
> From: [EMAIL PROTECTED]
> To: Repeater-Builder@yahoogroups.com
> Subject: RE: [Repeater-Builder] Re: Motorola Micro 1?4 kilowatt
> Repeater
> Date: Mon, 20 Mar 2006 16:33:14 -
> 
> >Ahhh... the famous Motorola 1/4kw dual 4cx250b final?  
> >Never saw one that held up long term without regular 
> >hands-on service.  Hard to keep a blower going in some 
> >of the earlier units. 
> >
> >You're going to love trouble-shooting the safety interlock 
> >circuits connected to the power supply.  Just a bit more 
> >fun than working on an MSY or MHB repeater/base. 
> >
> >cheers, 
> >skipp 
> >
> >> "ke4ovn"  wrote:
> >> Hello Group:
> >> Looking on information on A motorola micro repeater, 
> >> 2 tube final Model Number-B93rcb-31058.On 2meter 
> >> band now, Tube final drop from 250watts to 30 watts. 
> >> Need to find a manual number so I can troubleshoot.
> >>
> >
> >
> >
> >
> >
> >
> >
> >
> > 
> >Yahoo! Groups Links
> >
> >
> >
> > 
> >
> >
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> 
> >>>Yahoo! Groups Links
> >>>
> >>>
> >>>
> >>> 
> >>>
> >>>
> >>
> >>
> >

Re: [Repeater-Builder] cable tv hardline loss question

[Kevin Custer]

tony dinkel wrote:
> Can someone estimate for me, the approximate loss of typical half inch cable 
> TV hard line at 450 mHz?

CommScope .500 (1/2 inch) P3 cable is rated at 1.56 dB per 100 feet at 
68 degrees F.



75 to 50 ohm transitions can be made by following this article:


Kevin Custer








 
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[Repeater-Builder] Re: Carrier Operated Relay (COR)

[Zakaria Dahili]

Motorola GP300, thanks.

Zak
9M2ZC
--- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote:
>
> 
>   First off, we'll need to know 'which handies?' 
> 
>   Neil 
> 
>  Original Message 
> From: [EMAIL PROTECTED]
> To: Repeater-Builder@yahoogroups.com
> Subject: RE: [Repeater-Builder] Carrier Operated Relay (COR)
> Date: Mon, 20 Mar 2006 14:16:24 -
> 
> >HI All, I am new here. Can somebody help me with the circuit to 
build
> >
> >the above. What I have in mind is to use 2 Motorola handies and 
> >convert it into a small repeater. I also need the circuit which 
has a
> >
> >delay "tail" of about 1.5 secs. Thanks. - de 9M2ZC
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > 
> >Yahoo! Groups Links
> >
> >
> >
> > 
> >
> >
>











 
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[Repeater-Builder] Re: Carrier Operated Relay (COR)

[Zakaria Dahili]

Hi Skipp,
I just want to take from the speaker output of the RX radio, and 
feed it to the COR cicuit so that I could activate the PTT on the 
transmit radio, could you help me with the circuit?

I prefer to use Motorola GP300

Thanks
9M2ZC
--- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> 
wrote:
>
> Do you plan to open the radios up to add the cor 
> circuit?  ...Or would/do you want to just use 
> speaker audio output for (cor & repeat audio) 
> everything?  Both methods are quite possible... 
> using the speaker audio out is semi quirky but 
> very easy to do. 
> 
> cheers,
> skipp 
> 
> 
> > "Zakaria Dahili"  wrote:
> > HI All, I am new here. Can somebody help me with the circuit to 
build 
> > the above. What I have in mind is to use 2 Motorola handies and 
> > convert it into a small repeater. I also need the circuit which 
has a 
> > delay "tail" of about 1.5 secs. Thanks. - de 9M2ZC
> >
>










 
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[Repeater-Builder] RE: Linking suggestions

[E J Moses]

-- Original Message --
> Received: Sun, 19 Mar 2006 10:50:26 PM CST
> From: DCFluX
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Linking Suggestions Please

Why not put a 440 link radio at the 220 site. Terminate the 440 radio with a
dummy load rated to handle the power your radio can produce (plus some
headroom). You probably could use an ht, if it can take the duty cycle. As
close as they are it shouldn't be a problem. If the 440 machine is
"tailless" machine the this seems the logical approach.

Good Luck
KC4WDI







 
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