Re: [Repeater-Builder] Re: Rolling Pipe Sound

[Nate Duehr]

Nasssty.  Evil IM.  Nice find.

Nate WY0X

On Dec 7, 2009, at 8:49 PM, larynl2 wrote:

> 
> Do you have two FM stations in your area that are separated by 600 kc.? That 
> will definitely do exactly what you describe. We had it on our repeater.
> 
> I caught in one of your posts that your transmitter needs to be on for the 
> problem to appear, so that's intermod causing your interference, not just a 
> random carrier coming from a router or whatever device.
> 
> The problem here was caused by an FM station on 89.9 about a mile away, and 
> another one on 89.3 roughly six miles away, plus our transmitter on 147.06. 
> A+B-C=D 147.06 + 89.9 - 89.3 = 147.66. The thing to watch for with FM 
> broadcast intermod is the wide bandwidth of the intermod product. There was 
> no interference until BOTH stations were quiet -- no modulation. Obviously, 
> the instances of both being quiet simultaneously are quite random in length 
> and occurrence, depending on the program material of each. 
> 
> I tracked the location of the mixing with the aid of a spectrum analyzer, 
> which turned out to be safety cables threaded through the turnbuckles.
> 
> Laryn K8TVZ

[Repeater-Builder] Re: 406-420 MHz Radios

[burkleoj]

Ted,
Thanks for the offer. I am going to have to pass on the Mostar. I have been 
trying to keep as much of the equipment between sites the same as possible. We 
are pretty well familiar with the Micor and Mitrek series of radios and I think 
we want to stick with those if at all possible.

I may be needing some more reeds and channel elements though, so I will keep 
you in mind for those.

Thanks,
Joe - WA7JAW


--- In Repeater-Builder@yahoogroups.com, Ted Bleiman K9MDM - MDM Radio 
 wrote:
>
> joe
> i have a mostar 406-430 if that'll do you any good works with mike (I'm 
> pretty sure) $50 + post (it'll ship priority)
> mdm ted
>

Re: [Repeater-Builder] Sd174 uhf

[DCFluX]

A 50 ohm terminator should suffice, you may want to tune the terminated side
to notch the TX frequency.

On Mon, Dec 7, 2009 at 7:28 PM, Ian Wells  wrote:

>
>
>   Yep its a mobile style 6 pack notch .would it be best with a 50 ohm
> dummy load or 50 ohm terminator.I thought about tuning it with notch of
> 473.200 on the side we want to use (between the sd174 and antenna) and notch
> of 517.025 on the unused side (the side that goes to the dummy  load)
>
>  Thank You ,Ian Wells
> Kerinvale Comaudio,
> 361 Camboon road, Biloela.4715
> Ph 0749922449 Mb 0409159932
> Hm 0749922574 Fx 0749922767
> www.kerinvalecomaudio.com.au
>
> *---Original Message---*
>
>  *From:* DCFluX 
> *Date:* 8/12/2009 12:59:08 PM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Sd174 uhf
>
>
>
> dont know that number, but sounds like a mobile style 6 cavity notch
> duplexer, try the other side if the insertion loss is too high going one
> way, and the opposite side should have a 50 ohm load on it
>
> On Mon, Dec 7, 2009 at 6:01 PM, Ian Wells  wrote:
>
>
>   Can one side of a 6mc450s diplexer  be  used as I have a few of them
> laying around  .The first test I tried worked well with a 6mc450s with no
> interference but the 174 lost a lot of its TX power through it .from 3 watt
> it reduced it down to .5 watt .I can say I didn't have a 50 ohm terminator
> on the unused port which I should try next time and see how that's goes
>
>
>   Thank You ,Ian Wells
> Kerinvale Comaudio,
> 361 Camboon road, Biloela.4715
> Ph 0749922449 Mb 0409159932
> Hm 0749922574 Fx 0749922767
> www.kerinvalecomaudio.com.au
>
> *---Original Message---*
>
>   *From:* DCFluX 
> *Date:* 8/12/2009 11:51:22 AM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Sd174 uhf
>
>
>
> In that case use a single notch cavity to remove the 473 frequency in
> question.
>
> Circulators can be used in conjunction with shorted stubs and cavities to
> create super narrow notch filters, but this may be more than you need.
>
>
> http://books.google.com/books?id=trJ6rhF0lU0C&pg=PA122&dq=circulator+notch+filter#v=onepage&q=circulator%20notch%20filter&f=false
>
> On Mon, Dec 7, 2009 at 5:21 PM, Ian Wells  wrote:
>
>
>   How would a circulator or isolator work .The transmitt signal from the
> data radio could pass through to the antenna and the rx signal could be
> received from the antenna and The signal you wish to remove from the data
> radio radio on receive could be notched to the dummy load .
> The data radio radio frequencies are set for 507.025mhz rx 517.025mhz TX
> and the frequency that is interfering is on 473.200mhz.
>
>   Thank You ,Ian Wells
> Kerinvale Comaudio,
> 361 Camboon road, Biloela.4715
> Ph 0749922449 Mb 0409159932
> Hm 0749922574 Fx 0749922767
> www.kerinvalecomaudio.com.au
>
> *---Original Message---*
>
>   *From:* DCFluX 
> *Date:* 8/12/2009 11:08:15 AM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Sd174 uhf
>
>
>
> depends on the quality of the filter. I would try using the coax stub
> routine with RG-58 as the coax, that should be fairly wide. But look at it
> on a spectrum analyzer to be sure it will pass both signals.
>
> If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide
> easy.
>
> On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells  wrote:
>
>
>   Our TX and rx frequencies are 10 meg apart so a band pass  filter  may
> have problems giving good signal on both or should I tune the filter in the
> middle of the two frequencies
>
>
>   Thank You ,Ian Wells
> Kerinvale Comaudio,
> 361 Camboon road, Biloela.4715
> Ph 0749922449 Mb 0409159932
> Hm 0749922574 Fx 0749922767
> www.kerinvalecomaudio.com.au
>
>   *---Original Message---*
>
>  *From:* DCFluX 
> *Date:* 8/12/2009 10:53:00 AM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Sd174 uhf
>
>
>
> The lack of a front end comes to mind. You basicly got there a hand held in
> a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass
> cavity, shorted coaxial stub or a interdigital bandpass filter.
>
> On Mon, Dec 7, 2009 at 3:42 PM, kerinvale  wrote:
>
>
>   Hi guys .I have a SD 174 maxon data radio and it seems to not be able
> filter other transmitters near by .The receiver opens up with squark noise
> even when programmed with ctcss .can anyone suggest whats possibly the
> problem is and possible fixes.I have one on site and it seems to be working
> perfectly but I know of two that are the same carn't filter signals nearby
>
>  
> Thank You,
> Ian Wells,
> Kerinvale Comaudio,
> 361 Camboon Road.Biloela.4715
> Ph 0749922449 or 0409159932 or 0749922574
> www.kerinvalecomaudio.com.au
>
>  .
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> 
>

Re: [Repeater-Builder] Re: Rolling Pipe Sound

[wd8chl]

larynl2 wrote:
> Do you have two FM stations in your area that are separated by 600
> kc.?  That will definitely do exactly what you describe.  We had it
> on our repeater.

Or AM. Or an AM station ON 600 kc also.

[Repeater-Builder] WTB Motorola VHF Quantar repeater

[Bill]

I am looking to buy a quantar in either vhf range...p-25 working condition.  
Willing to spend up to $1900.00.  I heard there were 
some selling at $1800.00 but do not know where or who is selling.
Thanks
Bill in Atlanta
404  325-8992
jawjabillatl   
at   
bellsouth   
dott   
net   
.
.

[Repeater-Builder] Re: Rolling Pipe Sound

[larynl2]

Do you have two FM stations in your area that are separated by 600 kc.?  That 
will definitely do exactly what you describe.  We had it on our repeater.

I caught in one of your posts that your transmitter needs to be on for the 
problem to appear, so that's intermod causing your interference, not just a 
random carrier coming from a router or whatever device.

The problem here was caused by an FM station on 89.9 about a mile away, and 
another one on 89.3 roughly six miles away, plus our transmitter on 147.06.  
A+B-C=D 147.06 + 89.9 - 89.3 = 147.66.  The thing to watch for with FM 
broadcast intermod is the wide bandwidth of the intermod product.  There was no 
interference until BOTH stations were quiet -- no modulation.  Obviously, the 
instances of both being quiet simultaneously are quite random in length and 
occurrence, depending on the program material of each.  

I tracked the location of the mixing with the aid of a spectrum analyzer, which 
turned out to be safety cables threaded through the turnbuckles.

Laryn K8TVZ

Re: [Repeater-Builder] Sd174 uhf

[wd8chl]

kerinvale wrote:
> Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter
> other transmitters near by .The receiver opens up with squark noise even
> when programmed with ctcss .can anyone suggest whats possibly the problem is
> and possible fixes.I have one on site and it seems to be working perfectly
> but I know of two that are the same carn't filter signals nearby 
> 
>  

Likely intermod. I'm not familiar with that specific radio, but 
virtually all 'data radios' I've seen are basically handhelds in a box. 
So it will have a crummy rx...

RE: [Repeater-Builder] Programming a CAT1000

[Mike Besemer (WM4B)]

Good luck, Joe.  I went through that drill a couple of years ago.  I
managed to get it all straightened out and documented, but it was quite a
headache at the time.

 

73,

 

Mike

WM4B

 

  _  

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Joe
Sent: Monday, December 07, 2009 8:52 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Programming a CAT1000

 

  

Thanks Mike,

This is an older cat1000 and not the B model. I'm trying to short-cut 
this repair to get it off my bench but it looks like I'm going to have 
to dig into things. This is an older Spectrum Communications repeater 
with the CAT1000 controller. The original builder is long gone and 
there are many mods done with no documentation. A small repair favor 
for a club looks like it's going to be in my basement for awhile until I 
figure things out. 

73, Joe, K1ike

Mike Besemer (WM4B) wrote:
> Joe,
>
> Have you got a manual? If not, it's available on the CATAUTO website.
>
> 

Re: [Repeater-Builder] Sd174 uhf

[Ian Wells]

Yep its a mobile style 6 pack notch .would it be best with a 50 ohm dummy
load or 50 ohm terminator.I thought about tuning it with notch of 473.200 on
the side we want to use (between the sd174 and antenna) and notch of 517.025
on the unused side (the side that goes to the dummy  load)
 
Thank You ,Ian Wells
Kerinvale Comaudio,
361 Camboon road, Biloela.4715
Ph 0749922449 Mb 0409159932 
Hm 0749922574 Fx 0749922767
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: DCFluX
Date: 8/12/2009 12:59:08 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Sd174 uhf
 
  
dont know that number, but sounds like a mobile style 6 cavity notch
duplexer, try the other side if the insertion loss is too high going one way
 and the opposite side should have a 50 ohm load on it


On Mon, Dec 7, 2009 at 6:01 PM, Ian Wells  wrote:



Can one side of a 6mc450s diplexer  be  used as I have a few of them laying
around  .The first test I tried worked well with a 6mc450s with no
interference but the 174 lost a lot of its TX power through it .from 3 watt
it reduced it down to .5 watt .I can say I didn't have a 50 ohm terminator
on the unused port which I should try next time and see how that's goes
 
 
Thank You ,Ian Wells
Kerinvale Comaudio,
361 Camboon road, Biloela.4715
Ph 0749922449 Mb 0409159932 
Hm 0749922574 Fx 0749922767
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: DCFluX
Date: 8/12/2009 11:51:22 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Sd174 uhf
 
  
In that case use a single notch cavity to remove the 473 frequency in
question.

Circulators can be used in conjunction with shorted stubs and cavities to
create super narrow notch filters, but this may be more than you need.

http://books.google
com/books?id=trJ6rhF0lU0C&pg=PA122&dq=circulator+notch+filter#v=onepage&q=cir
ulator%20notch%20filter&f=false


On Mon, Dec 7, 2009 at 5:21 PM, Ian Wells  wrote:



How would a circulator or isolator work .The transmitt signal from the data
radio could pass through to the antenna and the rx signal could be received
from the antenna and The signal you wish to remove from the data radio radio
on receive could be notched to the dummy load .
The data radio radio frequencies are set for 507.025mhz rx 517.025mhz TX and
the frequency that is interfering is on 473.200mhz.
 
Thank You ,Ian Wells
Kerinvale Comaudio,
361 Camboon road, Biloela.4715
Ph 0749922449 Mb 0409159932 
Hm 0749922574 Fx 0749922767
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: DCFluX
Date: 8/12/2009 11:08:15 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Sd174 uhf
 
  
depends on the quality of the filter. I would try using the coax stub
routine with RG-58 as the coax, that should be fairly wide. But look at it
on a spectrum analyzer to be sure it will pass both signals.

If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide
easy.


On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells  wrote:



Our TX and rx frequencies are 10 meg apart so a band pass  filter  may have
problems giving good signal on both or should I tune the filter in the
middle of the two frequencies
 
 
Thank You ,Ian Wells
Kerinvale Comaudio,
361 Camboon road, Biloela.4715
Ph 0749922449 Mb 0409159932 
Hm 0749922574 Fx 0749922767
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: DCFluX
Date: 8/12/2009 10:53:00 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Sd174 uhf
 
  
The lack of a front end comes to mind. You basicly got there a hand held in
a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass
cavity, shorted coaxial stub or a interdigital bandpass filter.


On Mon, Dec 7, 2009 at 3:42 PM, kerinvale  wrote:



Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter
other transmitters near by .The receiver opens up with squark noise even
when programmed with ctcss .can anyone suggest whats possibly the problem is
and possible fixes.I have one on site and it seems to be working perfectly
but I know of two that are the same carn't filter signals nearby 
 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
.
 

 







 







 







 








 <>

Re: [Repeater-Builder] Sd174 uhf

[DCFluX]

dont know that number, but sounds like a mobile style 6 cavity notch
duplexer, try the other side if the insertion loss is too high going one
way, and the opposite side should have a 50 ohm load on it

On Mon, Dec 7, 2009 at 6:01 PM, Ian Wells  wrote:

>
>
>   Can one side of a 6mc450s diplexer  be  used as I have a few of them
> laying around  .The first test I tried worked well with a 6mc450s with no
> interference but the 174 lost a lot of its TX power through it .from 3 watt
> it reduced it down to .5 watt .I can say I didn't have a 50 ohm terminator
> on the unused port which I should try next time and see how that's goes
>
>
>  Thank You ,Ian Wells
> Kerinvale Comaudio,
> 361 Camboon road, Biloela.4715
> Ph 0749922449 Mb 0409159932
> Hm 0749922574 Fx 0749922767
> www.kerinvalecomaudio.com.au
>
> *---Original Message---*
>
>  *From:* DCFluX 
> *Date:* 8/12/2009 11:51:22 AM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Sd174 uhf
>
>
>
> In that case use a single notch cavity to remove the 473 frequency in
> question.
>
> Circulators can be used in conjunction with shorted stubs and cavities to
> create super narrow notch filters, but this may be more than you need.
>
>
> http://books.google.com/books?id=trJ6rhF0lU0C&pg=PA122&dq=circulator+notch+filter#v=onepage&q=circulator%20notch%20filter&f=false
>
> On Mon, Dec 7, 2009 at 5:21 PM, Ian Wells  wrote:
>
>
>   How would a circulator or isolator work .The transmitt signal from the
> data radio could pass through to the antenna and the rx signal could be
> received from the antenna and The signal you wish to remove from the data
> radio radio on receive could be notched to the dummy load .
> The data radio radio frequencies are set for 507.025mhz rx 517.025mhz TX
> and the frequency that is interfering is on 473.200mhz.
>
>   Thank You ,Ian Wells
> Kerinvale Comaudio,
> 361 Camboon road, Biloela.4715
> Ph 0749922449 Mb 0409159932
> Hm 0749922574 Fx 0749922767
> www.kerinvalecomaudio.com.au
>
> *---Original Message---*
>
>   *From:* DCFluX 
> *Date:* 8/12/2009 11:08:15 AM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Sd174 uhf
>
>
>
> depends on the quality of the filter. I would try using the coax stub
> routine with RG-58 as the coax, that should be fairly wide. But look at it
> on a spectrum analyzer to be sure it will pass both signals.
>
> If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide
> easy.
>
> On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells  wrote:
>
>
>   Our TX and rx frequencies are 10 meg apart so a band pass  filter  may
> have problems giving good signal on both or should I tune the filter in the
> middle of the two frequencies
>
>
>   Thank You ,Ian Wells
> Kerinvale Comaudio,
> 361 Camboon road, Biloela.4715
> Ph 0749922449 Mb 0409159932
> Hm 0749922574 Fx 0749922767
> www.kerinvalecomaudio.com.au
>
>   *---Original Message---*
>
>  *From:* DCFluX 
> *Date:* 8/12/2009 10:53:00 AM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Sd174 uhf
>
>
>
> The lack of a front end comes to mind. You basicly got there a hand held in
> a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass
> cavity, shorted coaxial stub or a interdigital bandpass filter.
>
> On Mon, Dec 7, 2009 at 3:42 PM, kerinvale  wrote:
>
>
>   Hi guys .I have a SD 174 maxon data radio and it seems to not be able
> filter other transmitters near by .The receiver opens up with squark noise
> even when programmed with ctcss .can anyone suggest whats possibly the
> problem is and possible fixes.I have one on site and it seems to be working
> perfectly but I know of two that are the same carn't filter signals nearby
>
>  
> Thank You,
> Ian Wells,
> Kerinvale Comaudio,
> 361 Camboon Road.Biloela.4715
> Ph 0749922449 or 0409159932 or 0749922574
> www.kerinvalecomaudio.com.au
>
>  .
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> 
>

Re: [Repeater-Builder] Programming a CAT1000

[Joe]

Thanks Mike,

This is an older cat1000 and not the B model.  I'm trying to short-cut 
this repair to get it off my bench but it looks like I'm going to have 
to dig into things.  This is an older Spectrum Communications repeater 
with the CAT1000 controller.  The original builder is long gone and 
there are many mods done with no documentation.  A small repair favor 
for a club looks like it's going to be in my basement for awhile until I 
figure things out. 

73, Joe, K1ike


Mike Besemer (WM4B) wrote:
> Joe,
>
> Have you got a manual?  If not, it's available on the CATAUTO website.
>
>   

Re: [Repeater-Builder] Re: Rolling Pipe Sound

[Facility 406 DM09]

I don't think I've ever heard a "rolling pipe" sound over a repeater,
although, once I had some interesting feedback from an SSB transmitter with
FM receiver.

Is there a good clean recording available?

Kurt

RE: [Repeater-Builder] MAxtrac Help please

[Eric Lemmon]

The answers are found in the Motorola Touch-Code Encoder Palm Microphone
instruction manual 6881114E07, which is still available from Motorola Parts
for about $3.  It covers fifteen different DTMF mikes, including the
HMN3013A used on the MaxTrac 800, and the HMN1037A used on the conventional
MaxTrac.  You can probably change the mike cord to make the 3013 "look" like
the 1037.

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of w7nikw7nik
Sent: Sunday, December 06, 2009 10:18 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] MAxtrac Help please

  

Has anyone rewired the pin out on a Motorola DTMF mic model hmn3013a to a
maxtrac 300?  I do not see voltage out the mic jack , this might be a
problem . Any help would be great 
I can get different dtmf mic , but i don't know what model to get .

[Repeater-Builder] Re: Rolling Pipe Sound

[offtracks1]

Eric

Thanks, I have had great service from Telwave. They were very helpful for 
newbie. 

Thanks for all the tips and ideas everyone. It took me on a yet one more of 
many sniffing runs with my ht and about 10 feet of coax with about 2" of the 
center exposed so I could really sniff close. 

Well I really think (HOPE) I found it maybe. Right spot on the input I can get 
a sound that kind of fits the sound I have been getting. I have my full weather 
station here as many folks use it including the weather service. It updated on 
the web ect. Well its a wired Davis weather station, so all the wires going to 
all the sensors work well as a antenna. 

After some close hunting it will fully open the Ht's squelch right on the 
input. it is coming from the one line I did not have a bead on. Its the main 
data line to the computer system that then records and sends it out to my web 
page. Now with a snap on bead on it I only get it to open up right at the side 
of the snap on bead that is running into the weather station. So I put one on 
each end and that really weakend the signal. It still present but you have be 
right on it.

This just may be it as I have shut down everything but the weather station and 
it was unplugged from the power but it has a 9 volt backup battery in it.

We will see, I have claimed victory too early before with this noise. So the 
next test is wait and see.

By the way the DB224E Antenna is one very nice system its really woke up this 
repeater. I got it installed just about 2 weeks ago and switched off the backup 
antenna the diamond F22, its a good antenna but not for full time repeater 
service compared to the DB224E

Scott KB7DZR

--- In Repeater-Builder@yahoogroups.com, "Eric Lemmon"  wrote:
>
> Scott,
> 
> One source is Telewave.  Here are the datasheets for the 5" and 8" bandpass
> cavity filters:
> 
> 
> 
> With the 30% Amateur discount, the 5" cavity will cost you about $231 plus
> shipping, and the 8" cavity is about $100 more.  Other sources are Comprod,
> EMR, TX-RX, and Andrew.  Some brands may require purchase through a
> distributor, such as Tessco, Hutton, or Talley.  Always ask about a Ham
> discount when you are negotiating prices.  Depending upon the size of your
> order, you may get 25% or 30%.
> 
> 73, Eric Lemmon WB6FLY
>  
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of offtracks1
> Sent: Monday, December 07, 2009 3:56 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: Rolling Pipe Sound
> 
>   
> 
> The router is right at 147.580 to almost 147.595. The repeater input is
> 147.600. So I plan to take that offline. All that cables are double shielded
> with no adapters ect. I do not have anything between the isolator and the
> duplexer.
> 
> Where is a good dealer for a 5" or 8" band pass for the receiver?
> 
> I may look at going with that for the first step as it is not very bad but a
> bugger that pops up now and then.
> 
> Thanks for the help.
> 
> Scott 
> 
> --- In Repeater-Builder@yahoogroups.com
>  , "Eric Lemmon" 
> wrote:
> >
> > Scott,
> > 
> > A likely suspect is a carrier being emitted by a nearby computer or
> > microprocessor. A few years ago, I was setting up a GR1225 repeater on a
> > VHF channel, and I noticed that the receive indicator LED was lit
> steadily.
> > My spectrum analyzer revealed that there was a low-level but steady
> carrier
> > a few kHz off from my receive frequency. I then used my T-Hunt equipment
> to
> > pinpoint my desktop computer as the source. In the course of my
> > investigation, I also found weak but benign carriers being emitted from my
> > TV set, my idle microwave oven, and my programmable thermostat.
> > 
> > If it is an intermod problem, perhaps a DCI filter is far too wide to be
> of
> > much help. I'd strongly suggest putting a 5" or 8" bandpass cavity ahead
> of
> > the receiver- it is much sharper than the DCI product. Do you have a
> second
> > harmonic notch filter, or a low-pass filter, following the isolator? Are
> > all of the jumper cables double-shielded, with proper connectors on each
> > end- that is, no adapters or barrels?
> > 
> > 73, Eric Lemmon WB6FLY
> > 
> > 
> > -Original Message-
> > From: Repeater-Builder@yahoogroups.com
>  
> > [mailto:Repeater-Builder@yahoogroups.com
>  ] On Behalf Of offtracks1
> > Sent: Monday, December 07, 2009 12:49 PM
> > To: Repeater-Builder@yahoogroups.com
>  
> > Subject: [Repeater-Builder] Rolling Pipe Sound
> > 
> > 
> > 
> > Thanks for all the post and for the web site and group.
> > It's been very helpful to me as I have been setting up my system. 
> > 
> > My repeater system is a Kenwood TKR-750 K2, Telewave TPRD-1556 duplexer
> set
> > (6 cavities), A Telewave Isolator on the PA

Re: [Repeater-Builder] MAxtrac Help please

[Matt Harker]

The maxtrac radios placed a DC voltage on the mic hi wire.  If you do not see 
that voltage, the mic will not work.  

Now there is a possibility that the maxtrac may switch that voltage on and off 
along with the PTT (TX on and off) but I don't recall that being the case when 
I had the maxtracs.  

So far as model numbers on the maxtrac DTMF mics, I do not know any of them; 
despite having had a few across the years.
 KC5DBH Matt 





From: w7nikw7nik 
To: Repeater-Builder@yahoogroups.com
Sent: Mon, December 7, 2009 12:18:29 AM
Subject: [Repeater-Builder] MAxtrac Help please

Has anyone  rewired the pin out on a Motorola DTMF mic model hmn3013a  to a 
maxtrac 300 . I do not see voltage out the mic jack , this might be a problem . 
Any help would be great 
I can get different dtmf mic , but i don't know what model to get .








Yahoo! Groups Links




  

Re: [Repeater-Builder] Sd174 uhf

[Ian Wells]

Can one side of a 6mc450s diplexer  be  used as I have a few of them laying
around  .The first test I tried worked well with a 6mc450s with no
interference but the 174 lost a lot of its TX power through it .from 3 watt
it reduced it down to .5 watt .I can say I didn't have a 50 ohm terminator
on the unused port which I should try next time and see how that's goes

 
Thank You ,Ian Wells
Kerinvale Comaudio,
361 Camboon road, Biloela.4715
Ph 0749922449 Mb 0409159932 
Hm 0749922574 Fx 0749922767
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: DCFluX
Date: 8/12/2009 11:51:22 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Sd174 uhf
 
  
In that case use a single notch cavity to remove the 473 frequency in
question.

Circulators can be used in conjunction with shorted stubs and cavities to
create super narrow notch filters, but this may be more than you need.

http://books.google
com/books?id=trJ6rhF0lU0C&pg=PA122&dq=circulator+notch+filter#v=onepage&q=cir
ulator%20notch%20filter&f=false


On Mon, Dec 7, 2009 at 5:21 PM, Ian Wells  wrote:



How would a circulator or isolator work .The transmitt signal from the data
radio could pass through to the antenna and the rx signal could be received
from the antenna and The signal you wish to remove from the data radio radio
on receive could be notched to the dummy load .
The data radio radio frequencies are set for 507.025mhz rx 517.025mhz TX and
the frequency that is interfering is on 473.200mhz.
 
Thank You ,Ian Wells
Kerinvale Comaudio,
361 Camboon road, Biloela.4715
Ph 0749922449 Mb 0409159932 
Hm 0749922574 Fx 0749922767
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: DCFluX
Date: 8/12/2009 11:08:15 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Sd174 uhf
 
  
depends on the quality of the filter. I would try using the coax stub
routine with RG-58 as the coax, that should be fairly wide. But look at it
on a spectrum analyzer to be sure it will pass both signals.

If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide
easy.


On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells  wrote:



Our TX and rx frequencies are 10 meg apart so a band pass  filter  may have
problems giving good signal on both or should I tune the filter in the
middle of the two frequencies
 
 
Thank You ,Ian Wells
Kerinvale Comaudio,
361 Camboon road, Biloela.4715
Ph 0749922449 Mb 0409159932 
Hm 0749922574 Fx 0749922767
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: DCFluX
Date: 8/12/2009 10:53:00 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Sd174 uhf
 
  
The lack of a front end comes to mind. You basicly got there a hand held in
a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass
cavity, shorted coaxial stub or a interdigital bandpass filter.


On Mon, Dec 7, 2009 at 3:42 PM, kerinvale  wrote:



Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter
other transmitters near by .The receiver opens up with squark noise even
when programmed with ctcss .can anyone suggest whats possibly the problem is
and possible fixes.I have one on site and it seems to be working perfectly
but I know of two that are the same carn't filter signals nearby 
 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
.
 

 







 







 








 <>

Re: [Repeater-Builder] Sd174 uhf

[DCFluX]

In that case use a single notch cavity to remove the 473 frequency in
question.

Circulators can be used in conjunction with shorted stubs and cavities to
create super narrow notch filters, but this may be more than you need.

http://books.google.com/books?id=trJ6rhF0lU0C&pg=PA122&dq=circulator+notch+filter#v=onepage&q=circulator%20notch%20filter&f=false

On Mon, Dec 7, 2009 at 5:21 PM, Ian Wells  wrote:

>
>
>   How would a circulator or isolator work .The transmitt signal from the
> data radio could pass through to the antenna and the rx signal could be
> received from the antenna and The signal you wish to remove from the data
> radio radio on receive could be notched to the dummy load .
> The data radio radio frequencies are set for 507.025mhz rx 517.025mhz TX
> and the frequency that is interfering is on 473.200mhz.
>
>  Thank You ,Ian Wells
> Kerinvale Comaudio,
> 361 Camboon road, Biloela.4715
> Ph 0749922449 Mb 0409159932
> Hm 0749922574 Fx 0749922767
> www.kerinvalecomaudio.com.au
>
> *---Original Message---*
>
>  *From:* DCFluX 
> *Date:* 8/12/2009 11:08:15 AM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Sd174 uhf
>
>
>
> depends on the quality of the filter. I would try using the coax stub
> routine with RG-58 as the coax, that should be fairly wide. But look at it
> on a spectrum analyzer to be sure it will pass both signals.
>
> If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide
> easy.
>
> On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells  wrote:
>
>
>   Our TX and rx frequencies are 10 meg apart so a band pass  filter  may
> have problems giving good signal on both or should I tune the filter in the
> middle of the two frequencies
>
>
>   Thank You ,Ian Wells
> Kerinvale Comaudio,
> 361 Camboon road, Biloela.4715
> Ph 0749922449 Mb 0409159932
> Hm 0749922574 Fx 0749922767
> www.kerinvalecomaudio.com.au
>
>   *---Original Message---*
>
>  *From:* DCFluX 
> *Date:* 8/12/2009 10:53:00 AM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Sd174 uhf
>
>
>
> The lack of a front end comes to mind. You basicly got there a hand held in
> a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass
> cavity, shorted coaxial stub or a interdigital bandpass filter.
>
> On Mon, Dec 7, 2009 at 3:42 PM, kerinvale  wrote:
>
>
>   Hi guys .I have a SD 174 maxon data radio and it seems to not be able
> filter other transmitters near by .The receiver opens up with squark noise
> even when programmed with ctcss .can anyone suggest whats possibly the
> problem is and possible fixes.I have one on site and it seems to be working
> perfectly but I know of two that are the same carn't filter signals nearby
>
>  
> Thank You,
> Ian Wells,
> Kerinvale Comaudio,
> 361 Camboon Road.Biloela.4715
> Ph 0749922449 or 0409159932 or 0749922574
> www.kerinvalecomaudio.com.au
>
>  .
>
>
>
>
>
>
>
>
>
>
>
>
> 
>

Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?

[Matthew Kaufman]

bil.i...@yahoo.com wrote:
>
>
> Let me put in my two cents worth. Feed the power Thru the NO contact 
> of a relay. Connect the coil of the relay on the downside and the 
> relay will drop out and kill the power to the radio and the coil 
> before the battery is dead. A reset switch across the contacts will 
> start the system.
> 
Assuming the rats at the repeater site are nice enough to hit the switch 
when the power comes back on. Otherwise for unattended sites you'll need 
a bit more sophistication.

Matthew Kaufman







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RE: [Repeater-Builder] Re: Rolling Pipe Sound

[Eric Lemmon]

Scott,

One source is Telewave.  Here are the datasheets for the 5" and 8" bandpass
cavity filters:



With the 30% Amateur discount, the 5" cavity will cost you about $231 plus
shipping, and the 8" cavity is about $100 more.  Other sources are Comprod,
EMR, TX-RX, and Andrew.  Some brands may require purchase through a
distributor, such as Tessco, Hutton, or Talley.  Always ask about a Ham
discount when you are negotiating prices.  Depending upon the size of your
order, you may get 25% or 30%.

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of offtracks1
Sent: Monday, December 07, 2009 3:56 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Rolling Pipe Sound

  

The router is right at 147.580 to almost 147.595. The repeater input is
147.600. So I plan to take that offline. All that cables are double shielded
with no adapters ect. I do not have anything between the isolator and the
duplexer.

Where is a good dealer for a 5" or 8" band pass for the receiver?

I may look at going with that for the first step as it is not very bad but a
bugger that pops up now and then.

Thanks for the help.

Scott 

--- In Repeater-Builder@yahoogroups.com
 , "Eric Lemmon" 
wrote:
>
> Scott,
> 
> A likely suspect is a carrier being emitted by a nearby computer or
> microprocessor. A few years ago, I was setting up a GR1225 repeater on a
> VHF channel, and I noticed that the receive indicator LED was lit
steadily.
> My spectrum analyzer revealed that there was a low-level but steady
carrier
> a few kHz off from my receive frequency. I then used my T-Hunt equipment
to
> pinpoint my desktop computer as the source. In the course of my
> investigation, I also found weak but benign carriers being emitted from my
> TV set, my idle microwave oven, and my programmable thermostat.
> 
> If it is an intermod problem, perhaps a DCI filter is far too wide to be
of
> much help. I'd strongly suggest putting a 5" or 8" bandpass cavity ahead
of
> the receiver- it is much sharper than the DCI product. Do you have a
second
> harmonic notch filter, or a low-pass filter, following the isolator? Are
> all of the jumper cables double-shielded, with proper connectors on each
> end- that is, no adapters or barrels?
> 
> 73, Eric Lemmon WB6FLY
> 
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
 
> [mailto:Repeater-Builder@yahoogroups.com
 ] On Behalf Of offtracks1
> Sent: Monday, December 07, 2009 12:49 PM
> To: Repeater-Builder@yahoogroups.com
 
> Subject: [Repeater-Builder] Rolling Pipe Sound
> 
> 
> 
> Thanks for all the post and for the web site and group.
> It's been very helpful to me as I have been setting up my system. 
> 
> My repeater system is a Kenwood TKR-750 K2, Telewave TPRD-1556 duplexer
set
> (6 cavities), A Telewave Isolator on the PA. Running 1/2" Heilax to a
Andrew
> DB224E antenna. This a repeater at my home as I am on a small hill. The
> antenna is about 40 feet vertical and 60 feet horizontally from the
> repeater/office. 
> 
> It works very well but I have had intermod issue that rears its head now
and
> then that sounds like rolling pipe or hollow sound. I am runing a PL on
both
> TX and RX. This sound opens up the receiver even. So my tx pl is getting
> back into the system. I have hunted down many noise makers in the office
> that could have been helping out. One was the Linksys router. I am going
to
> replace it anyway as it makes a ton of noise I found. Changing my network
> from 100 to 10 on the card speed also reduced the noise levels. 
> 
> Still I get the rolling pipe sound now and then and it leaves as fast as
it
> shows up. If I use my other antenna a Diamond F22 also fed with 1/2 Heliax
I
> also get the same result. I do use a preamp but it also seems to not
change
> with or without it. I have even ran it so the receive antenna is alone and
> the transmit is the other (split). I still get the rolling pipes now and
> then.
> 
> I do have a FM radio station on 92.1 about 4 miles from me that is known
to
> have a sloppy signal. Could it be that this is mixing with my system and
> creating this? 
> 
> Looking at getting a DCI Band pass filter on the receiver side but I am
not
> sure if that is just throwing more money at this project and not getting
> anywhere still.
> 
> Just wanted to see if anyone had some ideas?
> 
> Scott KB7DZR
>

Re: [Repeater-Builder] Sd174 uhf

[Ian Wells]

How would a circulator or isolator work .The transmitt signal from the data
radio could pass through to the antenna and the rx signal could be received
from the antenna and The signal you wish to remove from the data radio radio
on receive could be notched to the dummy load .
The data radio radio frequencies are set for 507.025mhz rx 517.025mhz TX and
the frequency that is interfering is on 473.200mhz.
 
Thank You ,Ian Wells
Kerinvale Comaudio,
361 Camboon road, Biloela.4715
Ph 0749922449 Mb 0409159932 
Hm 0749922574 Fx 0749922767
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: DCFluX
Date: 8/12/2009 11:08:15 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Sd174 uhf
 
  
depends on the quality of the filter. I would try using the coax stub
routine with RG-58 as the coax, that should be fairly wide. But look at it
on a spectrum analyzer to be sure it will pass both signals.

If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide
easy.


On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells  wrote:



Our TX and rx frequencies are 10 meg apart so a band pass  filter  may have
problems giving good signal on both or should I tune the filter in the
middle of the two frequencies
 
 
Thank You ,Ian Wells
Kerinvale Comaudio,
361 Camboon road, Biloela.4715
Ph 0749922449 Mb 0409159932 
Hm 0749922574 Fx 0749922767
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: DCFluX
Date: 8/12/2009 10:53:00 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Sd174 uhf
 
  
The lack of a front end comes to mind. You basicly got there a hand held in
a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass
cavity, shorted coaxial stub or a interdigital bandpass filter.


On Mon, Dec 7, 2009 at 3:42 PM, kerinvale  wrote:



Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter
other transmitters near by .The receiver opens up with squark noise even
when programmed with ctcss .can anyone suggest whats possibly the problem is
and possible fixes.I have one on site and it seems to be working perfectly
but I know of two that are the same carn't filter signals nearby 
 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
.
 

 







 








 <>

Re: [Repeater-Builder] Re: Rolling Pipe Sound

[DCFluX]

Certain linksys routers may be able to take different the firmware.

http://www.dd-wrt.com/site/index

Of particular note is the ability to change the clock speed.

Also it has been my experience that the router isn't really the source of
the interference. Try switching the SMPS wall wart to one of the linear
variety.

On Mon, Dec 7, 2009 at 5:00 PM, WA3GIN  wrote:

>
>
> Just catchingup on this... yes the infamous rolling pipe sound.
>
> We had an issue with a link receiver that occassionaly would get hung-up in
> a loop, low audio but the correct PL.  We switched from PL to DCT on the
> links and that solved the problem.  We spent a year hunting for the source
> but no joy.
>
> Good Luck,
> dave
> WA3GIN
> W4AVA Trustee
>
>
> - Original Message -
> *From:* offtracks1 
> *To:* Repeater-Builder@yahoogroups.com
> *Sent:* Monday, December 07, 2009 5:25 PM
> *Subject:* [Repeater-Builder] Re: Rolling Pipe Sound
>
>
>
> No worries, the more info the better. Echoproducer is the Bees Knees if you
> are running echolink. It is one very impressive and free program. Peter has
> put a lot of work into it.
>
> Scott
>
> --- In Repeater-Builder@yahoogroups.com, Tony KT9AC  wrote:
>
>
>
> 

Re: [Repeater-Builder] Sd174 uhf

[DCFluX]

depends on the quality of the filter. I would try using the coax stub
routine with RG-58 as the coax, that should be fairly wide. But look at it
on a spectrum analyzer to be sure it will pass both signals.

If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide
easy.

On Mon, Dec 7, 2009 at 4:57 PM, Ian Wells  wrote:

>
>
>   Our TX and rx frequencies are 10 meg apart so a band pass  filter  may
> have problems giving good signal on both or should I tune the filter in the
> middle of the two frequencies
>
>
>  Thank You ,Ian Wells
> Kerinvale Comaudio,
> 361 Camboon road, Biloela.4715
> Ph 0749922449 Mb 0409159932
> Hm 0749922574 Fx 0749922767
> www.kerinvalecomaudio.com.au
>
> *---Original Message---*
>
>  *From:* DCFluX 
> *Date:* 8/12/2009 10:53:00 AM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Sd174 uhf
>
>
>
> The lack of a front end comes to mind. You basicly got there a hand held in
> a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass
> cavity, shorted coaxial stub or a interdigital bandpass filter.
>
> On Mon, Dec 7, 2009 at 3:42 PM, kerinvale  wrote:
>
>
>   Hi guys .I have a SD 174 maxon data radio and it seems to not be able
> filter other transmitters near by .The receiver opens up with squark noise
> even when programmed with ctcss .can anyone suggest whats possibly the
> problem is and possible fixes.I have one on site and it seems to be working
> perfectly but I know of two that are the same carn't filter signals nearby
>
>  
> Thank You,
> Ian Wells,
> Kerinvale Comaudio,
> 361 Camboon Road.Biloela.4715
> Ph 0749922449 or 0409159932 or 0749922574
> www.kerinvalecomaudio.com.au
>
>  .
>
>
>
>
>
>
>
>
> 
>

Re: [Repeater-Builder] Re: Rolling Pipe Sound

[WA3GIN]

Just catchingup on this... yes the infamous rolling pipe sound.  

We had an issue with a link receiver that occassionaly would get hung-up in a 
loop, low audio but the correct PL.  We switched from PL to DCT on the links 
and that solved the problem.  We spent a year hunting for the source but no joy.

Good Luck,
dave
WA3GIN
W4AVA Trustee

  - Original Message - 
  From: offtracks1 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Monday, December 07, 2009 5:25 PM
  Subject: [Repeater-Builder] Re: Rolling Pipe Sound



  No worries, the more info the better. Echoproducer is the Bees Knees if you 
are running echolink. It is one very impressive and free program. Peter has put 
a lot of work into it.

  Scott

  --- In Repeater-Builder@yahoogroups.com, Tony KT9AC  wrote:

Re: [Repeater-Builder] Sd174 uhf

[Ian Wells]

Our TX and rx frequencies are 10 meg apart so a band pass  filter  may have
problems giving good signal on both or should I tune the filter in the
middle of the two frequencies

 
Thank You ,Ian Wells
Kerinvale Comaudio,
361 Camboon road, Biloela.4715
Ph 0749922449 Mb 0409159932 
Hm 0749922574 Fx 0749922767
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: DCFluX
Date: 8/12/2009 10:53:00 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Sd174 uhf
 
  
The lack of a front end comes to mind. You basicly got there a hand held in
a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass
cavity, shorted coaxial stub or a interdigital bandpass filter.


On Mon, Dec 7, 2009 at 3:42 PM, kerinvale  wrote:



Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter
other transmitters near by .The receiver opens up with squark noise even
when programmed with ctcss .can anyone suggest whats possibly the problem is
and possible fixes.I have one on site and it seems to be working perfectly
but I know of two that are the same carn't filter signals nearby 
 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
.
 

 








 <>

[Repeater-Builder] Re: Rolling Pipe Sound

[offtracks1]

The router is right at 147.580 to almost 147.595. The repeater input is 
147.600. So I plan to take that offline. All that cables are double shielded 
with no adapters ect. I do not have anything between the isolator and the 
duplexer.

Where is a good dealer for a 5" or 8" band pass for the receiver?

I may look at going with that for the first step as it is not very bad but a 
bugger that pops up now and then.

Thanks for the help.

Scott 

--- In Repeater-Builder@yahoogroups.com, "Eric Lemmon"  wrote:
>
> Scott,
> 
> A likely suspect is a carrier being emitted by a nearby computer or
> microprocessor.  A few years ago, I was setting up a GR1225 repeater on a
> VHF channel, and I noticed that the receive indicator LED was lit steadily.
> My spectrum analyzer revealed that there was a low-level but steady carrier
> a few kHz off from my receive frequency.  I then used my T-Hunt equipment to
> pinpoint my desktop computer as the source.  In the course of my
> investigation, I also found weak but benign carriers being emitted from my
> TV set, my idle microwave oven, and my programmable thermostat.
> 
> If it is an intermod problem, perhaps a DCI filter is far too wide to be of
> much help.  I'd strongly suggest putting a 5" or 8" bandpass cavity ahead of
> the receiver- it is much sharper than the DCI product.  Do you have a second
> harmonic notch filter, or a low-pass filter, following the isolator?  Are
> all of the jumper cables double-shielded, with proper connectors on each
> end- that is, no adapters or barrels?
> 
> 73, Eric Lemmon WB6FLY
>  
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of offtracks1
> Sent: Monday, December 07, 2009 12:49 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Rolling Pipe Sound
> 
>   
> 
> Thanks for all the post and for the web site and group.
> It's been very helpful to me as I have been setting up my system. 
> 
> My repeater system is a Kenwood TKR-750 K2, Telewave TPRD-1556 duplexer set
> (6 cavities), A Telewave Isolator on the PA. Running 1/2" Heilax to a Andrew
> DB224E antenna. This a repeater at my home as I am on a small hill. The
> antenna is about 40 feet vertical and 60 feet horizontally from the
> repeater/office. 
> 
> It works very well but I have had intermod issue that rears its head now and
> then that sounds like rolling pipe or hollow sound. I am runing a PL on both
> TX and RX. This sound opens up the receiver even. So my tx pl is getting
> back into the system. I have hunted down many noise makers in the office
> that could have been helping out. One was the Linksys router. I am going to
> replace it anyway as it makes a ton of noise I found. Changing my network
> from 100 to 10 on the card speed also reduced the noise levels. 
> 
> Still I get the rolling pipe sound now and then and it leaves as fast as it
> shows up. If I use my other antenna a Diamond F22 also fed with 1/2 Heliax I
> also get the same result. I do use a preamp but it also seems to not change
> with or without it. I have even ran it so the receive antenna is alone and
> the transmit is the other (split). I still get the rolling pipes now and
> then.
> 
> I do have a FM radio station on 92.1 about 4 miles from me that is known to
> have a sloppy signal. Could it be that this is mixing with my system and
> creating this? 
> 
> Looking at getting a DCI Band pass filter on the receiver side but I am not
> sure if that is just throwing more money at this project and not getting
> anywhere still.
> 
> Just wanted to see if anyone had some ideas?
> 
> Scott KB7DZR
>

Re: [Repeater-Builder] Sd174 uhf

[DCFluX]

The lack of a front end comes to mind. You basicly got there a hand held in
a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass
cavity, shorted coaxial stub or a interdigital bandpass filter.

On Mon, Dec 7, 2009 at 3:42 PM, kerinvale  wrote:

>
>
>   Hi guys .I have a SD 174 maxon data radio and it seems to not be able
> filter other transmitters near by .The receiver opens up with squark noise
> even when programmed with ctcss .can anyone suggest whats possibly the
> problem is and possible fixes.I have one on site and it seems to be working
> perfectly but I know of two that are the same carn't filter signals nearby
>
>  
> Thank You,
> Ian Wells,
> Kerinvale Comaudio,
> 361 Camboon Road.Biloela.4715
> Ph 0749922449 or 0409159932 or 0749922574
> www.kerinvalecomaudio.com.au
>
>  .
>
>
>
>
> 

RE: [Repeater-Builder] Programming a CAT1000

[Mike Besemer (WM4B)]

Joe,

Have you got a manual?  If not, it's available on the CATAUTO website.

You need to do a Dipswitch 7 reset to reset the password.  Per the manual:

"Switch 7 This switch is used to initialize the CAT-1000B. Set this switch
to ON. Cycle the
power OFF and back ON. During power-up, the memory will be flushed and
reloaded with
default values. The voice will say: "RESET DATA LOAD COMPLETED." Set switch
#7 to
the OFF position."

Don't forget, if you're programming by the Serial Port,  you have to set
Dipswitch 8 ON before programming and OFF again when complete. 

This switch is used to program a new unlock number. Set switch 8 to ON. The
voice
will say: "ENTER CONTROL." After the seven-digit unlock number is entered,
set switch
8 to OFF.
This switch is also used to activate the CAT-1000B computer interface. This
permits
programming of the CAT-1000B through the RS-232 serial port. Set dipswitch 8
to ON
and apply power to the CAT-1000B. After the power up message is complete,
the CAT-
1000B will automatically switch to the computer terminal programming mode.
This RS-
232 port is configured"

Mike


> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> buil...@yahoogroups.com] On Behalf Of Joe
> Sent: Monday, December 07, 2009 6:02 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Programming a CAT1000
> 
> I found my DOS disk program, but can't find my notes on how to use the
> program.  Anyone have this information?  Also, it looks like someone
> changed the default password of "cat1000", does anyone know if it can
> be
> reset?
> 
> I'm working on a repeater for a club and I'm trying to get it off my
> bench, any help is appreciated!
> 
> 73, Joe, K1ike
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 

Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?

[bil . isom]

Let me put in my two cents worth.  Feed the power Thru  the NO contact of a 
relay.   Connect the coil of the relay on the downside and the relay will drop 
out and kill the power to the radio and the coil before the battery is dead.  A 
reset switch across the contacts will start the system. 
Sent from my Verizon Wireless BlackBerry

-Original Message-
From: "Eric Lemmon" 
Date: Mon, 07 Dec 2009 15:12:13 
To: 
Subject: RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?

Jim,

The Schottky diode approach works best with a switching supply that is
inherently current-limiting.  Some linear supplies cannot start under load,
following a power outage.  Although it may take a day or two to recharge an
AGM battery when it only sees the float voltage.  Ideally, the AGM battery
should be bulk-charged at a higher than normal voltage, and then put back on
float voltage once it is fully charged.

But, that process involves a more complex and expensive setup than most
folks want.  My Schottky diode setup works just fine and is simple to
implement.  Some folks may argue that a low-voltage disconnect feature is
needed, but many radios simply stop working once the supply voltage drops
much below 9 or 10 volts- sort of a built-in LVD feature.  Of course, some
radios and controllers will continue to draw current all the way down to
zero volts, and I avoid such power hogs for that reason.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jim Cicirello
Sent: Monday, December 07, 2009 2:40 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?

  

Hi Eric,

I have been trying to follow these posts on battery back power. Under this
arrangement you describe, will the supply not get hot with the Schottky
Diode in place if the battery is discharged very low? 

I am researching the best way to hook the battery to my Astron which does
not have the back-up charger. 

Thanks for all of the information.

 

73 JIM  KA2AJH  

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Lyon
Sent: Monday, December 07, 2009 12:45 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?

 

  

Sorry. Yes, it's a -BB version.

-Mike



On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon mailto:wb6...@verizon.net> > wrote:

  

Mike,

I thought that only the RM-35M-BB has a battery backup circuit built-in; I
have an RM-35M power supply in service, and it does not have a battery
charging circuit.

A very simple method of achieving no-break battery backup is to install a
Schottky power diode on the positive output terminal of the power supply,
and connect both the battery positive terminal and the radio power leads to
the cathode lug of the diode. My preferred Schottky diode for this
application is an International Rectifier 122NQ030R. The diode is mounted
on a 1" wide copper bar that is placed on the power supply's positive output
stud. The diode has a 1/4" output terminal, which makes it very easy to add
to an existing system. Note that the "R" in the diode part number means
that it is reverse polarity. The output voltage setting of the power supply
must be increased about 1/2 volt to compensate for the forward voltage drop
of the Schottky diode. The voltage should be set so that the AGM battery
has the recommended float voltage at its terminals while the radios are
operating and the system has stabilized at least 24 hours. This voltage
will usually be around 14.2-14.5 VDC, depending upon the battery
specifications.

73, Eric Lemmon WB6FLY




-Original Message-
From: Repeater-Builder@yahoogroups.com
 
[mailto:Repeater-Builder@yahoogroups.com
 ] On Behalf Of Mike Lyon
Sent: Sunday, December 06, 2009 10:02 PM
To: Repeater-Builder@yahoogroups.com
 
Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities?

Howdy Folks,

I am wondering if anyone has experience with the Astron RM-35M and its
built-in charging circuit? Has anyone used it to charge 12VDC AGM batteries?
I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power
supply and I need to put some backup power on the system. 

I am wondering, should I buy a separate charger for the AGM batteries (Qty.
2) or is the charging circuit within the the RM-35M sufficient?

73's,
Mike Lyon
KE6MRE



 

RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?

[Eric Lemmon]

Mike,

The -BB circuit is simply some diodes and a resistor to limit charging
current.  The basic circuit is found here:


73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Lyon
Sent: Monday, December 07, 2009 2:43 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?

  

Is the circuit in the -BB version a charger or is it simply just a switch?

Thanks,
Mike



On Mon, Dec 7, 2009 at 2:39 PM, Jim Cicirello mailto:ka2...@gmail.com> > wrote:


  



Hi Eric,

I have been trying to follow these posts on battery back power.
Under this arrangement you describe, will the supply not get hot with the
Schottky Diode in place if the battery is discharged very low? 

I am researching the best way to hook the battery to my Astron which
does not have the back-up charger. 

Thanks for all of the information.

 

73 JIM  KA2AJH  

From: Repeater-Builder@yahoogroups.com

[mailto:Repeater-Builder@yahoogroups.com
 ] On Behalf Of Mike Lyon
Sent: Monday, December 07, 2009 12:45 PM

To: Repeater-Builder@yahoogroups.com
 

Subject: Re: [Repeater-Builder] Astron RM-35M AGM charging
abilities?

 

  

Sorry. Yes, it's a -BB version.

-Mike



On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon mailto:wb6...@verizon.net> > wrote:

  

Mike,

I thought that only the RM-35M-BB has a battery backup circuit
built-in; I
have an RM-35M power supply in service, and it does not have a
battery
charging circuit.

A very simple method of achieving no-break battery backup is to
install a
Schottky power diode on the positive output terminal of the power
supply,
and connect both the battery positive terminal and the radio power
leads to
the cathode lug of the diode. My preferred Schottky diode for this
application is an International Rectifier 122NQ030R. The diode is
mounted
on a 1" wide copper bar that is placed on the power supply's
positive output
stud. The diode has a 1/4" output terminal, which makes it very easy
to add
to an existing system. Note that the "R" in the diode part number
means
that it is reverse polarity. The output voltage setting of the power
supply
must be increased about 1/2 volt to compensate for the forward
voltage drop
of the Schottky diode. The voltage should be set so that the AGM
battery
has the recommended float voltage at its terminals while the radios
are
operating and the system has stabilized at least 24 hours. This
voltage
will usually be around 14.2-14.5 VDC, depending upon the battery
specifications.

73, Eric Lemmon WB6FLY




-Original Message-
From: Repeater-Builder@yahoogroups.com
 
[mailto:Repeater-Builder@yahoogroups.com
 ] On Behalf Of Mike Lyon
Sent: Sunday, December 06, 2009 10:02 PM
To: Repeater-Builder@yahoogroups.com
 
Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities?

Howdy Folks,

I am wondering if anyone has experience with the Astron RM-35M and
its
built-in charging circuit? Has anyone used it to charge 12VDC AGM
batteries?
I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this
power
supply and I need to put some backup power on the system. 

I am wondering, should I buy a separate charger for the AGM
batteries (Qty.
2) or is the charging circuit within the the RM-35M sufficient?

73's,
Mike Lyon
KE6MRE



 

RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?

[Eric Lemmon]

Jim,

The Schottky diode approach works best with a switching supply that is
inherently current-limiting.  Some linear supplies cannot start under load,
following a power outage.  Although it may take a day or two to recharge an
AGM battery when it only sees the float voltage.  Ideally, the AGM battery
should be bulk-charged at a higher than normal voltage, and then put back on
float voltage once it is fully charged.

But, that process involves a more complex and expensive setup than most
folks want.  My Schottky diode setup works just fine and is simple to
implement.  Some folks may argue that a low-voltage disconnect feature is
needed, but many radios simply stop working once the supply voltage drops
much below 9 or 10 volts- sort of a built-in LVD feature.  Of course, some
radios and controllers will continue to draw current all the way down to
zero volts, and I avoid such power hogs for that reason.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jim Cicirello
Sent: Monday, December 07, 2009 2:40 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?

  

Hi Eric,

I have been trying to follow these posts on battery back power. Under this
arrangement you describe, will the supply not get hot with the Schottky
Diode in place if the battery is discharged very low? 

I am researching the best way to hook the battery to my Astron which does
not have the back-up charger. 

Thanks for all of the information.

 

73 JIM  KA2AJH  

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Lyon
Sent: Monday, December 07, 2009 12:45 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?

 

  

Sorry. Yes, it's a -BB version.

-Mike



On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon mailto:wb6...@verizon.net> > wrote:

  

Mike,

I thought that only the RM-35M-BB has a battery backup circuit built-in; I
have an RM-35M power supply in service, and it does not have a battery
charging circuit.

A very simple method of achieving no-break battery backup is to install a
Schottky power diode on the positive output terminal of the power supply,
and connect both the battery positive terminal and the radio power leads to
the cathode lug of the diode. My preferred Schottky diode for this
application is an International Rectifier 122NQ030R. The diode is mounted
on a 1" wide copper bar that is placed on the power supply's positive output
stud. The diode has a 1/4" output terminal, which makes it very easy to add
to an existing system. Note that the "R" in the diode part number means
that it is reverse polarity. The output voltage setting of the power supply
must be increased about 1/2 volt to compensate for the forward voltage drop
of the Schottky diode. The voltage should be set so that the AGM battery
has the recommended float voltage at its terminals while the radios are
operating and the system has stabilized at least 24 hours. This voltage
will usually be around 14.2-14.5 VDC, depending upon the battery
specifications.

73, Eric Lemmon WB6FLY




-Original Message-
From: Repeater-Builder@yahoogroups.com
 
[mailto:Repeater-Builder@yahoogroups.com
 ] On Behalf Of Mike Lyon
Sent: Sunday, December 06, 2009 10:02 PM
To: Repeater-Builder@yahoogroups.com
 
Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities?

Howdy Folks,

I am wondering if anyone has experience with the Astron RM-35M and its
built-in charging circuit? Has anyone used it to charge 12VDC AGM batteries?
I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power
supply and I need to put some backup power on the system. 

I am wondering, should I buy a separate charger for the AGM batteries (Qty.
2) or is the charging circuit within the the RM-35M sufficient?

73's,
Mike Lyon
KE6MRE



 

[Repeater-Builder] Programming a CAT1000

[Joe]

I found my DOS disk program, but can't find my notes on how to use the 
program.  Anyone have this information?  Also, it looks like someone 
changed the default password of "cat1000", does anyone know if it can be 
reset?

I'm working on a repeater for a club and I'm trying to get it off my 
bench, any help is appreciated!

73, Joe, K1ike






Yahoo! Groups Links

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

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<*> To change settings online go to:
http://groups.yahoo.com/group/Repeater-Builder/join
(Yahoo! ID required)

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repeater-builder-unsubscr...@yahoogroups.com

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

RE: [Repeater-Builder] Rolling Pipe Sound

[Eric Lemmon]

Scott,

A likely suspect is a carrier being emitted by a nearby computer or
microprocessor.  A few years ago, I was setting up a GR1225 repeater on a
VHF channel, and I noticed that the receive indicator LED was lit steadily.
My spectrum analyzer revealed that there was a low-level but steady carrier
a few kHz off from my receive frequency.  I then used my T-Hunt equipment to
pinpoint my desktop computer as the source.  In the course of my
investigation, I also found weak but benign carriers being emitted from my
TV set, my idle microwave oven, and my programmable thermostat.

If it is an intermod problem, perhaps a DCI filter is far too wide to be of
much help.  I'd strongly suggest putting a 5" or 8" bandpass cavity ahead of
the receiver- it is much sharper than the DCI product.  Do you have a second
harmonic notch filter, or a low-pass filter, following the isolator?  Are
all of the jumper cables double-shielded, with proper connectors on each
end- that is, no adapters or barrels?

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of offtracks1
Sent: Monday, December 07, 2009 12:49 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Rolling Pipe Sound

  

Thanks for all the post and for the web site and group.
It's been very helpful to me as I have been setting up my system. 

My repeater system is a Kenwood TKR-750 K2, Telewave TPRD-1556 duplexer set
(6 cavities), A Telewave Isolator on the PA. Running 1/2" Heilax to a Andrew
DB224E antenna. This a repeater at my home as I am on a small hill. The
antenna is about 40 feet vertical and 60 feet horizontally from the
repeater/office. 

It works very well but I have had intermod issue that rears its head now and
then that sounds like rolling pipe or hollow sound. I am runing a PL on both
TX and RX. This sound opens up the receiver even. So my tx pl is getting
back into the system. I have hunted down many noise makers in the office
that could have been helping out. One was the Linksys router. I am going to
replace it anyway as it makes a ton of noise I found. Changing my network
from 100 to 10 on the card speed also reduced the noise levels. 

Still I get the rolling pipe sound now and then and it leaves as fast as it
shows up. If I use my other antenna a Diamond F22 also fed with 1/2 Heliax I
also get the same result. I do use a preamp but it also seems to not change
with or without it. I have even ran it so the receive antenna is alone and
the transmit is the other (split). I still get the rolling pipes now and
then.

I do have a FM radio station on 92.1 about 4 miles from me that is known to
have a sloppy signal. Could it be that this is mixing with my system and
creating this? 

Looking at getting a DCI Band pass filter on the receiver side but I am not
sure if that is just throwing more money at this project and not getting
anywhere still.

Just wanted to see if anyone had some ideas?

Scott KB7DZR

[Repeater-Builder] Re: Astron RM-35M AGM charging abilities?

[skipp025]

 
> A very simple method of achieving no-break battery 
> backup is to install a Schottky power diode on the 
> positive output terminal of the power supply,
> and connect both the battery positive terminal and 
> the radio power leads to the cathode lug of the diode. 

What happens to the battery and power supply in a 
long term discharge/fault condition? 

What happens when power is restored after a long term 
discharge condition?  

s. 

Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?

[Mike Lyon]

Is the circuit in the -BB version a charger or is it simply just a switch?

Thanks,
Mike


On Mon, Dec 7, 2009 at 2:39 PM, Jim Cicirello  wrote:

>
>
>  Hi Eric,
>
> I have been trying to follow these posts on battery back power. Under this
> arrangement you describe, will the supply *not* get hot with the Schottky
> Diode in place if the battery is discharged very low?
>
> I am researching the best way to hook the battery to my Astron which does
> not have the back-up charger.
>
> Thanks for all of the information.
>
>
>
> 73 JIM  KA2AJH
>
> *From:* Repeater-Builder@yahoogroups.com [mailto:
> repeater-buil...@yahoogroups.com] *On Behalf Of *Mike Lyon
> *Sent:* Monday, December 07, 2009 12:45 PM
>
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?
>
>
>
>
>
> Sorry. Yes, it's a -BB version.
>
> -Mike
>
>  On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon  wrote:
>
>
>
> Mike,
>
> I thought that only the RM-35M-BB has a battery backup circuit built-in; I
> have an RM-35M power supply in service, and it does not have a battery
> charging circuit.
>
> A very simple method of achieving no-break battery backup is to install a
> Schottky power diode on the positive output terminal of the power supply,
> and connect both the battery positive terminal and the radio power leads to
> the cathode lug of the diode. My preferred Schottky diode for this
> application is an International Rectifier 122NQ030R. The diode is mounted
> on a 1" wide copper bar that is placed on the power supply's positive
> output
> stud. The diode has a 1/4" output terminal, which makes it very easy to add
> to an existing system. Note that the "R" in the diode part number means
> that it is reverse polarity. The output voltage setting of the power supply
> must be increased about 1/2 volt to compensate for the forward voltage drop
> of the Schottky diode. The voltage should be set so that the AGM battery
> has the recommended float voltage at its terminals while the radios are
> operating and the system has stabilized at least 24 hours. This voltage
> will usually be around 14.2-14.5 VDC, depending upon the battery
> specifications.
>
> 73, Eric Lemmon WB6FLY
>
>
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:Repeater-Builder@yahoogroups.com]
> On Behalf Of Mike Lyon
> Sent: Sunday, December 06, 2009 10:02 PM
> To: Repeater-Builder@yahoogroups.com 
> Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities?
>
> Howdy Folks,
>
> I am wondering if anyone has experience with the Astron RM-35M and its
> built-in charging circuit? Has anyone used it to charge 12VDC AGM
> batteries?
> I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power
> supply and I need to put some backup power on the system.
>
> I am wondering, should I buy a separate charger for the AGM batteries (Qty.
> 2) or is the charging circuit within the the RM-35M sufficient?
>
> 73's,
> Mike Lyon
> KE6MRE
>
>
>
>   
>

[Repeater-Builder] Sd174 uhf

[kerinvale]

Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter
other transmitters near by .The receiver opens up with squark noise even
when programmed with ctcss .can anyone suggest whats possibly the problem is
and possible fixes.I have one on site and it seems to be working perfectly
but I know of two that are the same carn't filter signals nearby 
 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 

.
 

 

RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?

[Jim Cicirello]

Hi Eric,

I have been trying to follow these posts on battery back power. Under this
arrangement you describe, will the supply not get hot with the Schottky
Diode in place if the battery is discharged very low? 

I am researching the best way to hook the battery to my Astron which does
not have the back-up charger. 

Thanks for all of the information.

 

73 JIM  KA2AJH  

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Lyon
Sent: Monday, December 07, 2009 12:45 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?

 

  

Sorry. Yes, it's a -BB version.

-Mike



On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon  wrote:

  

Mike,

I thought that only the RM-35M-BB has a battery backup circuit built-in; I
have an RM-35M power supply in service, and it does not have a battery
charging circuit.

A very simple method of achieving no-break battery backup is to install a
Schottky power diode on the positive output terminal of the power supply,
and connect both the battery positive terminal and the radio power leads to
the cathode lug of the diode. My preferred Schottky diode for this
application is an International Rectifier 122NQ030R. The diode is mounted
on a 1" wide copper bar that is placed on the power supply's positive output
stud. The diode has a 1/4" output terminal, which makes it very easy to add
to an existing system. Note that the "R" in the diode part number means
that it is reverse polarity. The output voltage setting of the power supply
must be increased about 1/2 volt to compensate for the forward voltage drop
of the Schottky diode. The voltage should be set so that the AGM battery
has the recommended float voltage at its terminals while the radios are
operating and the system has stabilized at least 24 hours. This voltage
will usually be around 14.2-14.5 VDC, depending upon the battery
specifications.

73, Eric Lemmon WB6FLY




-Original Message-
From: Repeater-Builder@yahoogroups.com
 
[mailto:Repeater-Builder@yahoogroups.com
 ] On Behalf Of Mike Lyon
Sent: Sunday, December 06, 2009 10:02 PM
To: Repeater-Builder@yahoogroups.com
 
Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities?

Howdy Folks,

I am wondering if anyone has experience with the Astron RM-35M and its
built-in charging circuit? Has anyone used it to charge 12VDC AGM batteries?
I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power
supply and I need to put some backup power on the system. 

I am wondering, should I buy a separate charger for the AGM batteries (Qty.
2) or is the charging circuit within the the RM-35M sufficient?

73's,
Mike Lyon
KE6MRE



 

[Repeater-Builder] Re: Rolling Pipe Sound

[offtracks1]

No worries, the more info the better. Echoproducer is the Bees Knees if you are 
running echolink. It is one very impressive and free program. Peter has put a 
lot of work into it.

Scott


--- In Repeater-Builder@yahoogroups.com, Tony KT9AC  wrote:
>
> Scott,
> I also would second the "reverse repeater" theory. Years ago (many) we 
> had a repeater in Western PA on 147.165 that would lock up with a 
> Michigan repeater on 147.765 (both rightfully coordinated) and produce 
> the "pipe" sound. In those days (1980s) everyone ran carrier squelch and 
> we had some Lake Erie ducting once in a while.
> 
> Its up to you, but was just a quick workaround that I started doing. 
> Funny thing is I can get the "growl" when the system ran DPL and 
> conditions are right...but its not the repeater since another temporary 
> system I put in did the same thing.
> 
> Sorry to hijack your note with my issue, but was hoping that there would 
> be some commonality and we would both benefit. Thanks for the 
> information on echoproducer, I might look into that.
> 
> Tony
> 
> offtracks1 wrote:
> >
> > Thanks for the quick reply
> >
> > The revers pair is a good point.
> >
> > I am in a remote area and did the full coordination but still we have 
> > had some odd ducting here as I am close to 9K mountains and I am at 
> > around 4K feet to start with.
> >
> > Tony I have not ran it without the tx pl. I have a few folks that like 
> > that including myself as I drop the tone before the TX, the controller 
> > is a ICS. But still for testing I may do that. I have echolink so I 
> > hook it up at night to the Ireland conference and set the system to 
> > listen only so I do not interfere with folks. Then with a program 
> > called echoproducer I can log each time the system gets kerchunched. 
> > sometimes its fine other times the log is big.
> >
> > Sorry I failed to put down its on 147.000 TX 147.600 RX.
> >
> > I have a repeater info page off of my weather station site.
> >
> > http://www.josephoregonweather.com/repeater.html 
> > 
> >
> > --- In Repeater-Builder@yahoogroups.com 
> > , Tony KT9AC  wrote:
> > >
> > > Scott,
> > > You are not alone in this!! I too have been fighting a problem almost
> > > exactly like this - I've tried different PL tones on RX and TX and that
> > > seemed to keep it from "self-oscillating". Seems to happen more when 
> > the
> > > weather is dry and I describe it as a "growl" sound. Happening on a
> > > MSF5000 at a commercial site. We too have numerous broadcast towers
> > > within 2 miles, and lots of Cellular/PCS antennas around. Mine is on
> > > UHF, yours appears to be high-band VHF (from the TKR-750 K2 note).
> > >
> > > I'm still working on a resolution, but again for now try either split
> > > tone or remove PL from the transmitter (CSQ). It would keep the 
> > repeater
> > > keyed up for several seconds, then drop signal and come back again (as
> > > long as the tail remained with PL output). I've also shortened the hang
> > > timer to 3 seconds to help. It wouldn't bring up the system unless
> > > someone kerchunked it, then it started.
> > >
> > > Tony, KT9AC
> > >
> >
> >
>

Re: [Repeater-Builder] Re: Rolling Pipe Sound

[Tony KT9AC]

Scott,
I also would second the "reverse repeater" theory. Years ago (many) we 
had a repeater in Western PA on 147.165 that would lock up with a 
Michigan repeater on 147.765 (both rightfully coordinated) and produce 
the "pipe" sound. In those days (1980s) everyone ran carrier squelch and 
we had some Lake Erie ducting once in a while.

Its up to you, but was just a quick workaround that I started doing. 
Funny thing is I can get the "growl" when the system ran DPL and 
conditions are right...but its not the repeater since another temporary 
system I put in did the same thing.

Sorry to hijack your note with my issue, but was hoping that there would 
be some commonality and we would both benefit. Thanks for the 
information on echoproducer, I might look into that.

Tony

offtracks1 wrote:
>
> Thanks for the quick reply
>
> The revers pair is a good point.
>
> I am in a remote area and did the full coordination but still we have 
> had some odd ducting here as I am close to 9K mountains and I am at 
> around 4K feet to start with.
>
> Tony I have not ran it without the tx pl. I have a few folks that like 
> that including myself as I drop the tone before the TX, the controller 
> is a ICS. But still for testing I may do that. I have echolink so I 
> hook it up at night to the Ireland conference and set the system to 
> listen only so I do not interfere with folks. Then with a program 
> called echoproducer I can log each time the system gets kerchunched. 
> sometimes its fine other times the log is big.
>
> Sorry I failed to put down its on 147.000 TX 147.600 RX.
>
> I have a repeater info page off of my weather station site.
>
> http://www.josephoregonweather.com/repeater.html 
> 
>
> --- In Repeater-Builder@yahoogroups.com 
> , Tony KT9AC  wrote:
> >
> > Scott,
> > You are not alone in this!! I too have been fighting a problem almost
> > exactly like this - I've tried different PL tones on RX and TX and that
> > seemed to keep it from "self-oscillating". Seems to happen more when 
> the
> > weather is dry and I describe it as a "growl" sound. Happening on a
> > MSF5000 at a commercial site. We too have numerous broadcast towers
> > within 2 miles, and lots of Cellular/PCS antennas around. Mine is on
> > UHF, yours appears to be high-band VHF (from the TKR-750 K2 note).
> >
> > I'm still working on a resolution, but again for now try either split
> > tone or remove PL from the transmitter (CSQ). It would keep the 
> repeater
> > keyed up for several seconds, then drop signal and come back again (as
> > long as the tail remained with PL output). I've also shortened the hang
> > timer to 3 seconds to help. It wouldn't bring up the system unless
> > someone kerchunked it, then it started.
> >
> > Tony, KT9AC
> >
>
> 






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[Repeater-Builder] Re: Rolling Pipe Sound

[offtracks1]

Thanks for the quick reply

The revers pair is a good point.

I am in a remote area and did the full coordination but still we have had some 
odd ducting here as I am close to 9K mountains and I am at around 4K feet to 
start with.

Tony I have not ran it without the tx pl. I have a few folks that like that 
including myself as I drop the tone before the TX, the controller is a ICS. But 
still for testing I may do that. I have echolink so I hook it up at night to 
the Ireland conference and set the system to listen only so I do not interfere 
with folks. Then with a program called echoproducer I can log each time the 
system gets kerchunched. sometimes its fine other times the log is big.

Sorry I failed to put down its on 147.000 TX 147.600 RX.

I have a repeater info page off of my weather station site.

http://www.josephoregonweather.com/repeater.html

--- In Repeater-Builder@yahoogroups.com, Tony KT9AC  wrote:
>
> Scott,
> You are not alone in this!! I too have been fighting a problem almost 
> exactly like this - I've tried different PL tones on RX and TX and that 
> seemed to keep it from "self-oscillating". Seems to happen more when the 
> weather is dry and I describe it as a "growl" sound. Happening on a 
> MSF5000 at a commercial site. We too have numerous broadcast towers 
> within 2 miles, and lots of Cellular/PCS antennas around. Mine is on 
> UHF, yours appears to be high-band VHF (from the TKR-750 K2 note).
> 
> I'm still working on a resolution, but again for now try either split 
> tone or remove PL from the transmitter (CSQ). It would keep the repeater 
> keyed up for several seconds, then drop signal and come back again (as 
> long as the tail remained with PL output). I've also shortened the hang 
> timer to 3 seconds to help. It wouldn't bring up the system unless 
> someone kerchunked it, then it started.
> 
> Tony, KT9AC
> 

[Repeater-Builder] pearl schwartz day

[Ted Bleiman K9MDM - MDM Radio]

Wishing you all a pleasant Pearl Schwartz day...

 Ted Bleiman K9MDMMDM Radio "If its in stock...we;ve got it!"
P O Box 31353 Chicago ,IL 60631-0353
773 631 5130



  

Re: [Repeater-Builder] Rolling Pipe Sound

[Tony KT9AC]

Scott,
You are not alone in this!! I too have been fighting a problem almost 
exactly like this - I've tried different PL tones on RX and TX and that 
seemed to keep it from "self-oscillating". Seems to happen more when the 
weather is dry and I describe it as a "growl" sound. Happening on a 
MSF5000 at a commercial site. We too have numerous broadcast towers 
within 2 miles, and lots of Cellular/PCS antennas around. Mine is on 
UHF, yours appears to be high-band VHF (from the TKR-750 K2 note).

I'm still working on a resolution, but again for now try either split 
tone or remove PL from the transmitter (CSQ). It would keep the repeater 
keyed up for several seconds, then drop signal and come back again (as 
long as the tail remained with PL output). I've also shortened the hang 
timer to 3 seconds to help. It wouldn't bring up the system unless 
someone kerchunked it, then it started.

Tony, KT9AC

offtracks1 wrote:
>
> Thanks for all the post and for the web site and group.
> It's been very helpful to me as I have been setting up my system.
>
> My repeater system is a Kenwood TKR-750 K2, Telwave TPRD-1556 duplexer 
> set (6 cavities), A Telwave Isolator on the PA. Running 1/2" Heilax to 
> a Andrew DB224E antenna. This a repeater at my home as I am on a small 
> hill. The antenna is about 40 feet vertical and 60 feet horizontally 
> from the repeater/office.
>
> It works very well but I have had intermod issue that rears its head 
> now and then that sounds like rolling pipe or hollow sound. I am 
> runing a PL on both TX and RX. This sound opens up the receiver even. 
> So my tx pl is getting back into the system. I have hunted down many 
> noise makers in the office that could have been helping out. One was 
> the Linksys router. I am going to replace it anyway as it makes a ton 
> of noise I found. Changing my network from 100 to 10 on the card speed 
> also reduced the noise levels.
>
> Still I get the rolling pipe sound now and then and it leaves as fast 
> as it shows up. If I use my other antenna a Diamond F22 also fed with 
> 1/2 Heliax I also get the same result. I do use a preamp but it also 
> seems to not change with or without it. I have even ran it so the 
> receive antenna is alone and the transmit is the other (split). I 
> still get the rolling pipes now and then.
>
> I do have a FM radio station on 92.1 about 4 miles from me that is 
> known to have a sloppy signal. Could it be that this is mixing with my 
> system and creating this?
>
> Looking at getting a DCI Band pass filter on the receiver side but I 
> am not sure if that is just throwing more money at this project and 
> not getting anywhere still.
>
> Just wanted to see if anyone had some ideas?
>
> Scott KB7DZR
>
> 






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Re: [Repeater-Builder] Rolling Pipe Sound

[Chuck Kelsey]

You may be locking up with a repeater on the reverse pair during a band 
opening.

Chuck
WB2EDV



- Original Message - 
From: "offtracks1" 
To: 
Sent: Monday, December 07, 2009 3:48 PM
Subject: [Repeater-Builder] Rolling Pipe Sound


> Thanks for all the post and for the web site and group.
> It's been very helpful to me as I have been setting up my system.
>
> My repeater system is a Kenwood TKR-750 K2, Telwave TPRD-1556 duplexer set 
> (6 cavities), A Telwave Isolator on the PA. Running 1/2" Heilax to a 
> Andrew DB224E antenna. This a repeater at my home as I am on a small hill. 
> The antenna is about 40 feet vertical and 60 feet horizontally from the 
> repeater/office.
>
> It works very well but I have had intermod issue that rears its head now 
> and then that sounds like rolling pipe or hollow sound. I am runing a PL 
> on both TX and RX. This sound opens up the receiver even. So my tx pl is 
> getting back into the system. I have hunted down many noise makers in the 
> office that could have been helping out. One was the Linksys router. I am 
> going to replace it anyway as it makes a ton of noise I found. Changing my 
> network from 100 to 10 on the card speed also reduced the noise levels.
>
> Still I get the rolling pipe sound now and then and it leaves as fast as 
> it shows up. If I use my other antenna a Diamond F22 also fed with 1/2 
> Heliax I also get the same result. I do use a preamp but it also seems to 
> not change with or without it. I have even ran it so the receive antenna 
> is alone and the transmit is the other (split). I still get the rolling 
> pipes now and then.
>
> I do have a FM radio station on 92.1 about 4 miles from me that is known 
> to have a sloppy signal. Could it be that this is mixing with my system 
> and creating this?
>
> Looking at getting a DCI Band pass filter on the receiver side but I am 
> not sure if that is just throwing more money at this project and not 
> getting anywhere still.
>
> Just wanted to see if anyone had some ideas?
>
> Scott KB7DZR
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>






No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 9.0.709 / Virus Database: 270.14.97/2550 - Release Date: 12/07/09 
02:33:00

[Repeater-Builder] Rolling Pipe Sound

[offtracks1]

Thanks for all the post and for the web site and group.
It's been very helpful to me as I have been setting up my system. 

My repeater system is a Kenwood TKR-750 K2, Telwave TPRD-1556 duplexer set (6 
cavities), A Telwave Isolator on the PA. Running 1/2" Heilax to a Andrew DB224E 
antenna. This a repeater at my home as I am on a small hill. The antenna is 
about 40 feet vertical and 60 feet horizontally from the repeater/office. 

It works very well but I have had intermod issue that rears its head now and 
then that sounds like rolling pipe or hollow sound. I am runing a PL on both TX 
and RX. This sound opens up the receiver even. So my tx pl is getting back into 
the system. I have hunted down many noise makers in the office that could have 
been helping out. One was the Linksys router. I am going to replace it anyway 
as it makes a ton of noise I found. Changing my network from 100 to 10 on the 
card speed also reduced the noise levels. 

Still I get the rolling pipe sound now and then and it leaves as fast as it 
shows up. If I use my other antenna a Diamond F22 also fed with 1/2 Heliax I 
also get the same result. I do use a preamp but it also seems to not change 
with or without it. I have even ran it so the receive antenna is alone and the 
transmit is the other (split). I still get the rolling pipes now and then.

I do have a FM radio station on 92.1 about 4 miles from me that is known to 
have a sloppy signal. Could it be that this is mixing with my system and 
creating this? 

Looking at getting a DCI Band pass filter on the receiver side but I am not 
sure if that is just throwing more money at this project and not getting 
anywhere still.

Just wanted to see if anyone had some ideas?

Scott KB7DZR 

Re: [Repeater-Builder] Tait T800 series 1 low band for 6m?

[Storer, Darren]

Hi Martin,

perhaps the repeater keeper of GB3VI can be of assistance to you:

http://www.repeaters.pwp.blueyonder.co.uk/index_files/Page406.htm

73 de
Darren
G7LWT

2009/12/2 cruizzer77 

>
>
> I'm collecting info about using a Tait T800 series 1 low band repeater as a
> ham 6m repeater, but info is very scarce. I do not own such a repeater yet
> but know where I'd get one in case I see that there is some hope for
> success.
>
> These are the problems one will most likely run into:
>
> First of all the factory software to generate the hex files is very
> stubborn and refuses to generate files for out of band frequencies. The
> factory frequency range is 66-88 MHz while I'd need it between 51 and 52
> MHz. BTW I only have the old dos software as the newer windows version is
> nowhere to be found.
>
> Second the hardware may need some tweaking, but to what extent?
>
> Furthermore I have not found the manuals for the T825 (RX), T827 (Exciter)
> and T828 (PA) modules.
>
> I'd appreciate if those who know these repeaters could say a few words
> about it. Thanks guys.
>
> 73 de Martin HB9TZW
>
>  
>

Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?

[Mike Lyon]

Sorry. Yes, it's a -BB version.

-Mike


On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon  wrote:

>
>
> Mike,
>
> I thought that only the RM-35M-BB has a battery backup circuit built-in; I
> have an RM-35M power supply in service, and it does not have a battery
> charging circuit.
>
> A very simple method of achieving no-break battery backup is to install a
> Schottky power diode on the positive output terminal of the power supply,
> and connect both the battery positive terminal and the radio power leads to
> the cathode lug of the diode. My preferred Schottky diode for this
> application is an International Rectifier 122NQ030R. The diode is mounted
> on a 1" wide copper bar that is placed on the power supply's positive
> output
> stud. The diode has a 1/4" output terminal, which makes it very easy to add
> to an existing system. Note that the "R" in the diode part number means
> that it is reverse polarity. The output voltage setting of the power supply
> must be increased about 1/2 volt to compensate for the forward voltage drop
> of the Schottky diode. The voltage should be set so that the AGM battery
> has the recommended float voltage at its terminals while the radios are
> operating and the system has stabilized at least 24 hours. This voltage
> will usually be around 14.2-14.5 VDC, depending upon the battery
> specifications.
>
> 73, Eric Lemmon WB6FLY
>
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:Repeater-Builder@yahoogroups.com]
> On Behalf Of Mike Lyon
> Sent: Sunday, December 06, 2009 10:02 PM
> To: Repeater-Builder@yahoogroups.com 
> Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities?
>
> Howdy Folks,
>
> I am wondering if anyone has experience with the Astron RM-35M and its
> built-in charging circuit? Has anyone used it to charge 12VDC AGM
> batteries?
> I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power
> supply and I need to put some backup power on the system.
>
> I am wondering, should I buy a separate charger for the AGM batteries (Qty.
> 2) or is the charging circuit within the the RM-35M sufficient?
>
> 73's,
> Mike Lyon
> KE6MRE
>
>
>  
>

RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?

[Eric Lemmon]

Mike,

I thought that only the RM-35M-BB has a battery backup circuit built-in; I
have an RM-35M power supply in service, and it does not have a battery
charging circuit.

A very simple method of achieving no-break battery backup is to install a
Schottky power diode on the positive output terminal of the power supply,
and connect both the battery positive terminal and the radio power leads to
the cathode lug of the diode.  My preferred Schottky diode for this
application is an International Rectifier 122NQ030R.  The diode is mounted
on a 1" wide copper bar that is placed on the power supply's positive output
stud.  The diode has a 1/4" output terminal, which makes it very easy to add
to an existing system.  Note that the "R" in the diode part number means
that it is reverse polarity.  The output voltage setting of the power supply
must be increased about 1/2 volt to compensate for the forward voltage drop
of the Schottky diode.  The voltage should be set so that the AGM battery
has the recommended float voltage at its terminals while the radios are
operating and the system has stabilized at least 24 hours.  This voltage
will usually be around 14.2-14.5 VDC, depending upon the battery
specifications.

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Lyon
Sent: Sunday, December 06, 2009 10:02 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Astron RM-35M AGM charging abilities?

  

Howdy Folks,

I am wondering if anyone has experience with the Astron RM-35M and its
built-in charging circuit? Has anyone used it to charge 12VDC AGM batteries?
I have 3 motorola Maxtracs (2 RX, 1 TX) that are powered from this power
supply and I need to put some backup power on the system. 

I am wondering, should I buy a separate charger for the AGM batteries (Qty.
2) or is the charging circuit within the the RM-35M sufficient?

73's,
Mike Lyon
KE6MRE
 

RE: [Repeater-Builder] MAxtrac Help please

[Robert Pease]

I believe some of the newer mic's don't have the tone encoder in the mic
and have it in the radio, I have what I thought was a newer TT mic on my
GTX, but no tones. I believe the MSC2000 is one like that.

 

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of wd8chl
Sent: Monday, December 07, 2009 11:11 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] MAxtrac Help please

 

  

w7nikw7nik wrote:
> Has anyone rewired the pin out on a Motorola DTMF mic model hmn3013a
> to a maxtrac 300 . I do not see voltage out the mic jack , this might
> be a problem . Any help would be great I can get different dtmf mic ,
> but i don't know what model to get .

As far as I can tell, it should just plug right in. Any Motorola with
the 8-pin modular jack should be wired the same. The only difference I
know of is the behavior of the mic, ie, whether the tones are sent
continuously as long as you hold the button, or just a short blip when
you first hit it. There are also some programmable units with memories,
etc.
In fact, you can take a DTMF mic from, say, a Micor/Syntor and just
change the cord and it should work too.
I even took a Mostar DTMF mic and re-wired it for a EFJ challenger low
band (7154 I think?). Just moved the wires around in the mic head!

If you don't have A+ on the jack, though, yeah, it probably won't
work...

Jim





Since 1974, the award-winning Alpert JFCS has helped families of all faiths 
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residences for the disabled, mentoring children, support groups and a lot more.

SOLUTIONS FOR LIVING 
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contacts ASAP.

 
  
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<><>

Re: [Repeater-Builder] 406-420 MHz Radios

[Ted Bleiman K9MDM - MDM Radio]

OH! well maybe he'll see this. happy holidays to all anyhow. mdm

 
Ted Bleiman K9MDM
MDM  
Radio    " If its in 
stock...we've got it!"
P O Box 31353
Chicago, IL 60631-0353 
773.631.5130  fax 773.775.8096  


web http://www.mdmradio.com'>http://www.mdmradio.com";>http://www.mdmradio.com
 email -  mailto:mdm...@yahoo.com";>mailto:mdmra...@yahoo.com";>mdmra...@yahoo.com <<< 
DIRECT ALL EMAIL 






From: Chuck Kelsey 
To: Repeater-Builder@yahoogroups.com
Sent: Mon, December 7, 2009 8:54:10 AM
Subject: Re: [Repeater-Builder] 406-420 MHz Radios

  

WA7JAW was asking.

Chuck
WB2EDV

- Original Message - 
From: "Joe" 
To: 
Sent: Monday, December 07, 2009 9:44 AM
Subject: Re: [Repeater-Builder] 406-420 MHz Radios

> Hi Ted,
> 
> I wasn't looking for a 406-430 radio, were you thinking of someone else?
> 
> Joe
> 
> 
> Ted Bleiman K9MDM - MDM Radio wrote:
>>
>>
>> joe
>> i have a mostar 406-430 if that'll do you any good works with mike 
>> (I'm pretty sure) $50 + post (it'll ship priority)
>> mdm ted


 


  

Re: [Repeater-Builder] MAxtrac Help please

[wd8chl]

w7nikw7nik wrote:
> Has anyone  rewired the pin out on a Motorola DTMF mic model hmn3013a
> to a maxtrac 300 . I do not see voltage out the mic jack , this might
> be a problem . Any help would be great I can get different dtmf mic ,
> but i don't know what model to get .

As far as I can tell, it should just plug right in. Any Motorola with
the 8-pin modular jack should be wired the same. The only difference I
know of is the behavior of the mic, ie, whether the tones are sent
continuously as long as you hold the button, or just a short blip when
you first hit it. There are also some programmable units with memories, etc.
In fact, you can take a DTMF mic from, say, a Micor/Syntor and just
change the cord and it should work too.
I even took a Mostar DTMF mic and re-wired it for a EFJ challenger low
band (7154 I think?). Just moved the wires around in the mic head!

If you don't have A+ on the jack, though, yeah, it probably won't work...

Jim

Re: [Repeater-Builder] 406-420 MHz Radios

[Chuck Kelsey]

WA7JAW was asking.

Chuck
WB2EDV



- Original Message - 
From: "Joe" 
To: 
Sent: Monday, December 07, 2009 9:44 AM
Subject: Re: [Repeater-Builder] 406-420 MHz Radios


> Hi Ted,
> 
> I wasn't looking for a 406-430 radio, were you thinking of someone else?
> 
> Joe
> 
> 
> Ted Bleiman K9MDM - MDM Radio wrote:
>>
>>
>> joe
>> i have a mostar 406-430 if that'll do you any good works with mike 
>> (I'm pretty sure) $50 + post (it'll ship priority)
>> mdm ted

Re: [Repeater-Builder] 406-420 MHz Radios

[Joe]

Hi Ted,

I wasn't looking for a 406-430 radio, were you thinking of someone else?

Joe


Ted Bleiman K9MDM - MDM Radio wrote:
>
>
> joe
> i have a mostar 406-430 if that'll do you any good works with mike 
> (I'm pretty sure) $50 + post (it'll ship priority)
> mdm ted
>
>
>
> 

Re: [Repeater-Builder] 406-420 MHz Radios

[Ted Bleiman K9MDM - MDM Radio]

joe
i have a mostar 406-430 if that'll do you any good works with mike (I'm pretty 
sure) $50 + post (it'll ship priority)
mdm ted