[Repeater-Builder] Re: What key fits an R-100 repeater?

[motarolla_doctor]

"Maire Company" <[EMAIL PROTECTED]> wrote:
> if you get any r 100 parts I am looking for a EPROM from the TX 
>board.   John


You can get the R100 EPROMs from Andy.

  Andy Brinkley   at  http://www.brinkleyelectronics.com


Tell Andy Will sent you.
 







 
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RE: [Repeater-Builder] Midland LMR

[[EMAIL PROTECTED]]

The 052 was the first series of midland prom programables the syntech I.
The syntech I radios had a 1.5 meg bandspread to maybe 2 meg wide if optimised. 
One of the so-cal hams dose the wide band mod and you can get the entire 50-54 
meg band in the syntech I radios without degradation.
The 0520 c should be a syntech II 40-54 meg wide band radio,The syntech II 
radios were made to work a wider spread, I believe a 4 or 5 meg bandspread.I do 
not know the specs for the factory wide band radios. But a call to midland has 
always gotten me the answers I have needed and they do have a website. 

Good luck and enjoy Six Meters I have worked Texas and Montana and many places 
in between on my 40 watt midland with a home made 6 meter ground plane.  
bob kd6gnb 

___
Speed up your surfing with Juno SpeedBand.
Now includes pop-up blocker!
Only $14.95/month -visit http://www.juno.com/surf to sign up today!





 
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[Repeater-Builder] controller question

[[EMAIL PROTECTED]]

Since we are on controllers dose anyone have info on the trans com controller ? 

I have 3 trans com rack shelf's and quite a few cards

.bob

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Re: [Repeater-Builder] AT&T Battery backup charger cheep

[Kris Kirby]

On Fri, 25 Mar 2005, John J. Riddell wrote:
> This will be a 48 volt system chargerset at 54 volts or so depending
> on the type of batteries used...I suspect that 
> most Ham sites would use 12 volt batteries?

On the other hand, you can usually find 130V AC inverters relatively cheap 
that run off of 48V for the same reason. 

--
Kris Kirby <[EMAIL PROTECTED]>
   "BIG BROTHER IS WATCHING YOU!"
 This message brought to you by the US Department of Homeland Security




 
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Re: [Repeater-Builder] What key fits an R-100 repeater?

[Adam T. Cately]

   Be advised, you need hacked software to program an R100 into the ham
bands...the stock program won't allow entries outside the commercial band
ends.


At 08:02 PM 3/31/05 -0500, you wrote:
>
> I'm not sure yet, but I plan to put it on the ham band.
>
>Joe
>
> Maire Company <[EMAIL PROTECTED]> wrote: 
>is this a working repeater?

   - Adam - 

   

  





 
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Re: [Repeater-Builder] Re: 2 meter repeater

[Ken wlter]

Okay.  Thanks a million.

Keane
--- Coy Hilton <[EMAIL PROTECTED]> wrote:

> 
> 
> HI Ken,
> 1.2 and 2.4 GHz and 902 MHz are in the UHF band and
> all are 
> available to you and you are right, 440 might be the
> easiest to get 
> on. 220 isn't used very often in some areas and a
> duplexer is real 
> big AND real expensive for 6 meters.
> Good Luck!  
> 
> 
> --- In Repeater-Builder@yahoogroups.com, Ken wlter
> <[EMAIL PROTECTED]> 
> wrote:
> > 
> > I'm a tech, so I will not be able to do it on any
> hf. 
> > Mabey on 440 or 220, or 6 meter.  But thanks for
> the
> > info.
> > 
> > 73's,
> > Keane
> > KD8AOZ







 
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Re: [Repeater-Builder] Midland LMR

[vmckever]

Thanks to everyone that responded.  I got the info on the radio.  Turns out 
to be wide band (as I thought) and 39 to 46 Mhz.  It is a S2.

Vincent N6OA/2 Stanford, NY

- Original Message - 
From: <[EMAIL PROTECTED]>
To: 
Sent: Friday, April 01, 2005 4:08 AM
Subject: RE: [Repeater-Builder] Midland LMR


>
>
> The 052 was the first series of midland prom programables the syntech I.
> The syntech I radios had a 1.5 meg bandspread to maybe 2 meg wide if 
> optimised. One of the so-cal hams dose the wide band mod and you can get 
> the entire 50-54 meg band in the syntech I radios without degradation.
> The 0520 c should be a syntech II 40-54 meg wide band radio,The syntech II 
> radios were made to work a wider spread, I believe a 4 or 5 meg 
> bandspread.I do not know the specs for the factory wide band radios. But a 
> call to midland has always gotten me the answers I have needed and they do 
> have a website.
>
> Good luck and enjoy Six Meters I have worked Texas and Montana and many 
> places in between on my 40 watt midland with a home made 6 meter ground 
> plane.
> bob kd6gnb
>
> ___
> Speed up your surfing with Juno SpeedBand.
> Now includes pop-up blocker!
> Only $14.95/month -visit http://www.juno.com/surf to sign up today!
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
> 





 
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RE: [Repeater-Builder] Syntor programming

[Andy Brinkley]

Tom 
-
 
I 
use:
 
Roger Ries program
    Paul Bennett's program 
A program that I wrote
 R-1801 Suitcase
 
Send 
me your file and I'll look at it and check it with a Syntor I keep on the on the 
bench and make sure it works.

 
It's 
been a while since I did a UHF Syntor, but if my memory is correct all that I 
did was generate the hex file with the receive if flipped, then all 
that you have to do is tune the receiver pre selectors, tweak the 
transmitter and you're ready to go. No changes to the VCO, 
etc.

 
I also 
recommend generating a test eeprom where you move the frequencies a 
few MHz on each channel, makes tune up a whole lot easier rather than going 20 
MHz in one jump.
 
Shameless plug - check out our eeprom adapters for the MCX-100 and 
Syntor:
 
http://www.brinkleyelectronics.com/adp/adp_fr.htm
 
73's
Andy--NC 
Certified Firefighter III / Instructor II / EMT-AFCC Licensed Technician / 
Amateur Call NC4AB / Echolink Node 5761http://www.brinkleyelectronics.com  
 













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[Repeater-Builder] GTX mobiles for 900?

[Dave VanHorn]

Any particular hazards or limitations with these, or is there 
something that's better/easier to use for repeater radios or links?









 
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RE: [Repeater-Builder] R-100 Was: What key fits an R-100 repeater?

[N9WYS]

Joe, 
You'll find the R-100 will make a fine ham repeater.  I am currently running 
one as a back-up to my primary machine (WW9AE/R - Joliet, IL) on 444.550 + / 
114.8, with no complaints whatsoever.  We even used it as a liaison repeater 
during the severe weather event Wednesday evening, relaying WX reports between 
various EOC's and the NWS in Chicago.  Mine is running ~10W out, and still 
covered several counties in NE Illinois.

Mark - N9WYS

-Original Message-
From: Joe [mailto:[EMAIL PROTECTED]
Sent: Thursday, March 31, 2005 7:02 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] What key fits an R-100 repeater?
 I'm not sure yet, but I plan to put it on the ham band.
Joe

 Maire Company <[EMAIL PROTECTED]> wrote:
is this a working repeater?





 
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RE: [Repeater-Builder] Syntor programming

[N9WYS]

Tom, 

 

Andy can fix you up.  I got a PROM from him for my project,
and it worked just fine.  (BTW –
you can read about my conversion on the Repeater-Builder’s web page.)  

 

Mark – N9WYS

 

-Original
Message-
From: Thomas Oliver
[mailto:[EMAIL PROTECTED]
Sent: Thursday, March 31, 2005
11:50 PM
To:
Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder]
Syntor programming

 

Hi Andy What program do you use to generate the file?  I have
a program from Roger Ries and have never done it before. I have the eeprom
programmer just wanted someone who hopefully has the same software so I can
compare thier immage with mine. 

 

Thanks

 

tom n8ies

 

 



- Original Message
- 



From: Andy Brinkley 



To: Repeater-Builder@yahoogroups.com

Sent: 3/31/2005
8:42:20 PM 

Subject: RE:
[Repeater-Builder] Syntor programming

Tom -

Contact me via e-mail, I
can send you a hex file with the info you need.

Andy
--
NC Certified Firefighter III / Instructor II / EMT-A
FCC Licensed Technician / Amateur Call NC4AB / Echolink Node 5761
http://www.brinkleyelectronics.com 




















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Re: [Repeater-Builder] GTX mobiles for 900?

[Doug Bade]

Dave;
 The GTX 900 mobiles can be used for links and such. They are not 
designed for that duty cycle however. The front end filters are difficult 
to replace, but can be done and will need to be done if you rx anywhere 
besides the 927 end of the band.. I know of 2 users for sure who use the 
exciter output of the radio for drive to an external station PA. The 
internal rf amps are prone to overheat if pushed continuously...

 The front end filters need to be replaced on all 900 radios if you 
wish to use them in the low part of the band.. some are just easier than 
others to replace..

So I guess that means a qualified yes on using them.

Doug
KD8B


At 09:25 AM 4/1/2005, you wrote:



>Any particular hazards or limitations with these, or is there
>something that's better/easier to use for repeater radios or links?
>
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] GTX mobiles for 900?

[Dave VanHorn]

At 10:36 AM 4/1/2005, Doug Bade wrote:

>Dave;
>  The GTX 900 mobiles can be used for links and such. They are not
>designed for that duty cycle however. The front end filters are difficult
>to replace, but can be done and will need to be done if you rx anywhere
>besides the 927 end of the band.. I know of 2 users for sure who use the
>exciter output of the radio for drive to an external station PA. The
>internal rf amps are prone to overheat if pushed continuously...

Ok, is there something that is better suited to the task?

I am working on a project here. I've just acquired control of a local 
repeater that's been neglected for some time, and I need to get a 
real control link up, as well as IRLP links.
Due to local ploitics (@#$!$!$#%) I expect some disgruntlement, and I 
am looking to 900 as a fairly secure band for control, and link channels.










 
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Re: [Repeater-Builder] GTX mobiles for 900?

[Kris Kirby]

On Fri, 1 Apr 2005, Dave VanHorn wrote:
> Any particular hazards or limitations with these, or is there 
> something that's better/easier to use for repeater radios or links?

Gravity is a real mother, so don't mount them anywhere where they will 
come down from if shaken loose. They don't tend to leave as big a dent as 
the D27 Spectra does, but I wonder if I'll ever get a chance to work that 
ding out of the floor. I was lucky it missed my head by a few inches on 
the trail.

--
Kris Kirby <[EMAIL PROTECTED]>
   "BIG BROTHER IS WATCHING YOU!"
 This message brought to you by the US Department of Homeland Security




 
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[Repeater-Builder] Multi-feed Repeater Antennas on a tower

[skipp025]

Re: Multi-feed Repeater Antennas on a tower 

Per previous group posts about repeater antennas 
fed with power dividers, I referenced an HR Mag 
article about a multiple feed system used around 
the base of large towers. 

I now have the article scanned into adobe pdf 
format and free copies are avail in one of three 
places.  

First request it direct from me: 
skipp025 at yahoo.com 
(probably the best near term method) 

Second download it off the RB Web Site when Mike 
gets the copy I sent him set up. 
www.repeater-builder.com 

Third same as above, download it from my sonic 
page when I have time to get it placed. 
www.radiowrench.com/sonic 

[File size is about 1.3MB, if you request a copy 
by Email, please be sure your mailbox won't 
bounce it back because of the large size.]

The mentioned text is a pdf file scan taken from 
a Sept 79 issue of HR Magazine.

"antenna design for omnidirectional repeater 
coverage"  

cheers,
skipp 

skipp025 at yahoo.com 







 
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Re: [Repeater-Builder] GTX mobiles for 900?

[Doug Bade]

Dave;
 What kind of erp do you need on the link? Is it close/Line of 
Sight? You may be able to operate at exciter levels in which case any of 
the mobile options will work great. What is your expected TX time on the 
link? Are you running it simplex or full duplex? A remote base is easier to 
set up than a full duplex link and requires a lot less equipment. What part 
of the 900 band you can link in per your coordinator body would dictate 
some equipment choices...
I guess we need a little more info to answer.. We can go to private email 
if it would be easier I will be glad to help you figure some options.

A control link could be done easily with GTXor eq., although you still 
likely need to change the front end filters... That application is low duty 
cycle in the TX dept A remote base config for IRLP is another matter 
entirely..

Doug
KD8B


At 10:47 AM 4/1/2005, you wrote:


>At 10:36 AM 4/1/2005, Doug Bade wrote:
>
> >Dave;
> >  The GTX 900 mobiles can be used for links and such. They are not
> >designed for that duty cycle however. The front end filters are difficult
> >to replace, but can be done and will need to be done if you rx anywhere
> >besides the 927 end of the band.. I know of 2 users for sure who use the
> >exciter output of the radio for drive to an external station PA. The
> >internal rf amps are prone to overheat if pushed continuously...
>
>Ok, is there something that is better suited to the task?
>
>I am working on a project here. I've just acquired control of a local
>repeater that's been neglected for some time, and I need to get a
>real control link up, as well as IRLP links.
>Due to local ploitics (@#$!$!$#%) I expect some disgruntlement, and I
>am looking to 900 as a fairly secure band for control, and link channels.
>
>
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] GTX mobiles for 900?

[Dave VanHorn]

At 12:04 PM 4/1/2005, Doug Bade wrote:

>Dave;
>  What kind of erp do you need on the link? Is it close/Line of
>Sight? You may be able to operate at exciter levels in which case any of
>the mobile options will work great.

About 3-5 miles, with yagis. I would figure 1W or less, absolutely, 
though I am expecting some attempts at tampering so I might want to 
make the receiver "deaf as a post" and yell at it.


>What is your expected TX time on the link?

For thermal concerns, I would assume continuous.
The control link wouldn't be up unless I needed to change something, 
and then only for a minute or so, but I would want to use the same 
radios throughout, in case I need to swap something.

>Are you running it simplex or full duplex?

Control link will be one-way, intermittent.
IRLP will be half-duplex AFAIK. Might go full dup later.

>A remote base is easier to set up than a full duplex link and 
>requires a lot less equipment.

My priorities are 1: Control link, 2: IRLP, 3: removing the 
controller from the repeater site, and operating just with links.

>What part of the 900 band you can link in per your coordinator body 
>would dictate some equipment choices...

Ok, I wasn't aware that there was a local plan. I'll check with them.

>I guess we need a little more info to answer.. We can go to private email
>if it would be easier I will be glad to help you figure some options.

Might as well let others learn/kibitz :)

>A control link could be done easily with GTXor eq., although you 
>still likely need to change the front end filters...

Unless I WANT it "deaf as a post" :)


>  That application is low duty cycle in the TX dept A remote 
> base config for IRLP is another matter entirely..

Well, I  do need to get to both.
I could do IRLP on 440 as well, I'm less concerned for security there.






 
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[Repeater-Builder] rlc-mot gated audio de-emph?

[skipp025]

Does the Link Comm rlc-mot board provide gated 
full discriminator audio or is it also de-emph
(and or also sub tone filtered)?  

Not obvious on the web site... 

thanks 
skipp 







 
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Re: [Repeater-Builder] rlc-mot gated audio de-emph?

[Mike Morris WA6ILQ]

At 11:59 AM 4/1/05, you wrote:

>Does the Link Comm rlc-mot board provide gated
>full discriminator audio

In the stock form, yes

>or is it also de-emph

Yes.  I forget the exact details, but you have to add
a cap between two unused pads and that rolls off the
audio (you can't have both at the some time - it's either
one or the other).  I have the info in my Mitrek interfacing
article at repeater-builder.com

>(and or also sub tone filtered)?

Nope.  No low end filtering at all.

>Not obvious on the web site...

Yup.

>thanks
>skipp

Mike WA6ILQ





 
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[Repeater-Builder] Re: cleaning shack & garage stuff for sale

[bthoman_nasa]

Bob: I would like to buy the Syntor-X service manual.  Please contract 
me at [EMAIL PROTECTED]  Thanks.

--- In Repeater-Builder@yahoogroups.com, "[EMAIL PROTECTED]" <[EMAIL 
PROTECTED]> 
wrote:
> 
> Hello all im cleaning out and have things that I need to get rid of 
> MOTOROLA VHF SYNTOR - X SERVICE MANUAL
> MOTOROLA VHF DVP MICOR BASE & REPEATER MANUAL
> MOTOROLA GR 400 & GR500 X PAND REPEATERS MANUAL
>  5.00 each plus postage 
> 
> thanks and look for more soon .bob








 
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[Repeater-Builder] Looking For Bob Selling Syntor X Service Manual

[bthoman_nasa]

Bob: saw your message from March 20 where you advertise a Syntor-X 
service manaual.  Would like to buy the manual. Please contract at 
[EMAIL PROTECTED] Thanks.







 
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Re: [Repeater-Builder] rlc-mot gated audio de-emph?

[Bob Dengler]

At 4/1/2005 12:14 PM, you wrote:

>At 11:59 AM 4/1/05, you wrote:
>
> >Does the Link Comm rlc-mot board provide gated
> >full discriminator audio
>
>In the stock form, yes
>
> >or is it also de-emph
>
>Yes.  I forget the exact details, but you have to add
>a cap between two unused pads and that rolls off the
>audio (you can't have both at the some time - it's either
>one or the other).  I have the info in my Mitrek interfacing
>article at repeater-builder.com
>
> >(and or also sub tone filtered)?
>
>Nope.  No low end filtering at all.

While we're on the subject, I've discovered that if you're going to have 
the RLC-MOT provide gating of the RX audio, it's best to HPF the audio 
before the RLC-MOT, not after.  The reason is that some HPFs "ring" around 
the cutoff freq. (~400 Hz on the CommSpec TS-32).  If you place that filter 
after the audio gate, the ring will be heard as sort of a 400 Hz pop.

I maintain a system that uses an RLC-MOT & SCom 7K controller.  We config'd 
the RLC-MOT to gate the audio going into the 7K because the COS propagation 
delay in the 7K is too slow to yield a "proper" Micor squelch (short 
squelch tail less than 3 milliseconds).  However, it still doesn't sound as 
good as other Micor repeaters because the HPF rings on squelch closure & 
that pop makes it through the 7K most of the time.

Bob NO6B






 
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Re: [Repeater-Builder] GTX mobiles for 900?

[Doug Bade]

Dave;
 It sounds like you may be able to use the GTX for a receive end, 
but some suitable continuous duty transmitter will be required. There are 
plenty of paging station type exciters which run 2 watts type power levels 
and can run from now until the end of time if you want.. I just would not 
recommend the GTX for that power level, dead key forever
 Not that I would take it for book, the ARRL publishes a bandplan 
which is utilized in most places who do not have their own bandplan. In 
general there are provisions for linking freq's in each area as well as 
duplex pairs for duplex needs.
 The deaf rx on the site end should be achievable with mid band 
freq selection on 915-920 ish The rx will be 10-15db down from nominal 
at that point, maybe 20db with the normal helical bricks used in most of 
the commercial 900 mobiles. Like about ~-90dbm -> -100dbm area.
 An additional though that these are all narrowband mobiles, so 
that means +-12.5khz deviation limits which tend to sound skinny when 
applied to a wideband system. Sig/noise is out of whack at vol hi, so 
better to couple at speaker level where it is all more or less equal after 
post processing...
 Most 900 mobiles do not come with DTMF pads, so some provision 
will be needed if you choose to control there too...
 If you want wideband audio at 900, I would recommend paging and 
converted 800 gear for the rx side, as they are capable of +_5khz, unlike 
commercial trunking/conventional mobiles.
 800 Maxtracs can be readily converted to 900 RX if they have a 
talkaround VCO. 16 pin accy jack version is better.. It will need a rom and 
some tweaking. Probably cheaper than the 900 GTX and it will be +_5khz...

Doug
KD8B




At 12:19 PM 4/1/2005, you wrote:

>At 12:04 PM 4/1/2005, Doug Bade wrote:
>
> >Dave;
> >  What kind of erp do you need on the link? Is it close/Line of
> >Sight? You may be able to operate at exciter levels in which case any of
> >the mobile options will work great.
>
>About 3-5 miles, with yagis. I would figure 1W or less, absolutely,
>though I am expecting some attempts at tampering so I might want to
>make the receiver "deaf as a post" and yell at it.
>
>
> >What is your expected TX time on the link?
>
>For thermal concerns, I would assume continuous.
>The control link wouldn't be up unless I needed to change something,
>and then only for a minute or so, but I would want to use the same
>radios throughout, in case I need to swap something.
>
> >Are you running it simplex or full duplex?
>
>Control link will be one-way, intermittent.
>IRLP will be half-duplex AFAIK. Might go full dup later.
>
> >A remote base is easier to set up than a full duplex link and
> >requires a lot less equipment.
>
>My priorities are 1: Control link, 2: IRLP, 3: removing the
>controller from the repeater site, and operating just with links.
>
> >What part of the 900 band you can link in per your coordinator body
> >would dictate some equipment choices...
>
>Ok, I wasn't aware that there was a local plan. I'll check with them.
>
> >I guess we need a little more info to answer.. We can go to private email
> >if it would be easier I will be glad to help you figure some options.
>
>Might as well let others learn/kibitz :)
>
> >A control link could be done easily with GTXor eq., although you
> >still likely need to change the front end filters...
>
>Unless I WANT it "deaf as a post" :)
>
>
> >  That application is low duty cycle in the TX dept A remote
> > base config for IRLP is another matter entirely..
>
>Well, I  do need to get to both.
>I could do IRLP on 440 as well, I'm less concerned for security there.
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] GTX mobiles for 900?

[Doug Bade]

I meant to say +_ 2.5khz deviation limits or 12.5 khz channel spacing limits...

Doug
KD8B


At 04:52 PM 4/1/2005, you wrote:

>Dave;
>  It sounds like you may be able to use the GTX for a receive end,
>but some suitable continuous duty transmitter will be required. There are
>plenty of paging station type exciters which run 2 watts type power levels
>and can run from now until the end of time if you want.. I just would not
>recommend the GTX for that power level, dead key forever
>  Not that I would take it for book, the ARRL publishes a bandplan
>which is utilized in most places who do not have their own bandplan. In
>general there are provisions for linking freq's in each area as well as
>duplex pairs for duplex needs.
>  The deaf rx on the site end should be achievable with mid band
>freq selection on 915-920 ish The rx will be 10-15db down from nominal
>at that point, maybe 20db with the normal helical bricks used in most of
>the commercial 900 mobiles. Like about ~-90dbm -> -100dbm area.
>  An additional though that these are all narrowband mobiles, so
>that means +-12.5khz deviation limits which tend to sound skinny when
>applied to a wideband system. Sig/noise is out of whack at vol hi, so
>better to couple at speaker level where it is all more or less equal after
>post processing...
>  Most 900 mobiles do not come with DTMF pads, so some provision
>will be needed if you choose to control there too...
>  If you want wideband audio at 900, I would recommend paging and
>converted 800 gear for the rx side, as they are capable of +_5khz, unlike
>commercial trunking/conventional mobiles.
>  800 Maxtracs can be readily converted to 900 RX if they have a
>talkaround VCO. 16 pin accy jack version is better.. It will need a rom and
>some tweaking. Probably cheaper than the 900 GTX and it will be +_5khz...
>
>Doug
>KD8B
>
>
>
>
>At 12:19 PM 4/1/2005, you wrote:
>
> >At 12:04 PM 4/1/2005, Doug Bade wrote:
> >
> > >Dave;
> > >  What kind of erp do you need on the link? Is it close/Line of
> > >Sight? You may be able to operate at exciter levels in which case any of
> > >the mobile options will work great.
> >
> >About 3-5 miles, with yagis. I would figure 1W or less, absolutely,
> >though I am expecting some attempts at tampering so I might want to
> >make the receiver "deaf as a post" and yell at it.
> >
> >
> > >What is your expected TX time on the link?
> >
> >For thermal concerns, I would assume continuous.
> >The control link wouldn't be up unless I needed to change something,
> >and then only for a minute or so, but I would want to use the same
> >radios throughout, in case I need to swap something.
> >
> > >Are you running it simplex or full duplex?
> >
> >Control link will be one-way, intermittent.
> >IRLP will be half-duplex AFAIK. Might go full dup later.
> >
> > >A remote base is easier to set up than a full duplex link and
> > >requires a lot less equipment.
> >
> >My priorities are 1: Control link, 2: IRLP, 3: removing the
> >controller from the repeater site, and operating just with links.
> >
> > >What part of the 900 band you can link in per your coordinator body
> > >would dictate some equipment choices...
> >
> >Ok, I wasn't aware that there was a local plan. I'll check with them.
> >
> > >I guess we need a little more info to answer.. We can go to private email
> > >if it would be easier I will be glad to help you figure some options.
> >
> >Might as well let others learn/kibitz :)
> >
> > >A control link could be done easily with GTXor eq., although you
> > >still likely need to change the front end filters...
> >
> >Unless I WANT it "deaf as a post" :)
> >
> >
> > >  That application is low duty cycle in the TX dept A remote
> > > base config for IRLP is another matter entirely..
> >
> >Well, I  do need to get to both.
> >I could do IRLP on 440 as well, I'm less concerned for security there.
> >
> >
> >
> >
> >
> >
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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[Repeater-Builder] Re: rlc-mot gated audio de-emph?

[skipp025]

Great information Bob, 

What is the reason or advantage of using the 
Link circuit board over the original motorola 
AS-Board?  Is the Link board just cleaner or 
is there additional support circuitry?  

Is a diagram of the rlc-mot layout available 
anywhere? 

thanks
skipp 
skipp025 at yahoo.com 


> Bob Dengler <[EMAIL PROTECTED]> wrote:
> At 4/1/2005 12:14 PM, you wrote:
> 
> >At 11:59 AM 4/1/05, you wrote:
> >
> > >Does the Link Comm rlc-mot board provide gated
> > >full discriminator audio
> >
> >In the stock form, yes
> >
> > >or is it also de-emph
> >
> >Yes.  I forget the exact details, but you have to add
> >a cap between two unused pads and that rolls off the
> >audio (you can't have both at the some time - it's either
> >one or the other).  I have the info in my Mitrek interfacing
> >article at repeater-builder.com
> >
> > >(and or also sub tone filtered)?
> >
> >Nope.  No low end filtering at all.
> 
> While we're on the subject, I've discovered that if you're going to
have 
> the RLC-MOT provide gating of the RX audio, it's best to HPF the audio 
> before the RLC-MOT, not after.  The reason is that some HPFs "ring"
around 
> the cutoff freq. (~400 Hz on the CommSpec TS-32).  If you place that
filter 
> after the audio gate, the ring will be heard as sort of a 400 Hz pop.
> 
> I maintain a system that uses an RLC-MOT & SCom 7K controller.  We
config'd 
> the RLC-MOT to gate the audio going into the 7K because the COS
propagation 
> delay in the 7K is too slow to yield a "proper" Micor squelch (short 
> squelch tail less than 3 milliseconds).  However, it still doesn't
sound as 
> good as other Micor repeaters because the HPF rings on squelch
closure & 
> that pop makes it through the 7K most of the time.
> 
> Bob NO6B







 
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[Repeater-Builder] Delay line chip (DAD4096) for Kendecom Mark 4

[Mike Besemer \(WM4B\)]

Greetings all,

I'm restoring a lightning-struck Kendecom Mark 4 to use as a back-up
repeater for our club.  (Actually, I'm restoring two of them, but one is
already done and on line... but I digress.)  

I've got the second machine up and running and it's been doing well on my
bench for the past several days, but the one remaining problem I have is
with the audio board.  The delay line (Reticon SAD4096) is bad, and will not
pass audio.  

I've jumpered around it so I now have a path for receiver and local audio to
pass to the transmitter, but unfortunately this causes a problem with the
autopatch.  Without the delay line, the first short burst of DTMF audio
passes to the phone line and is JUST long enough to cause the autopatch to
misdial about 99% of the time.  I know that this chip is pretty much
non-existent any more but I thought that perhaps someone out there might
just happen to have a spare they could part with. Short of that, perhaps
somebody has a relatively simple (and CHEAP) solution to the problem...
either a way to delay the audio just a fraction or to decrease the attack
time of the muting circuit so it cuts that short DTMF burst off.

As I said, this is our 2nd backup machine and other than the autopatch it's
working fine, so I'm not willing to spend too much time or effort to get it
100% capable, but if it's something relatively painless, I'll give it a try.


As an aside, although I've been working professionally in electronics for
the past 24 years or so (and been a ham for nearly 30) I've only recently
become involved in repeater maintenance.  This group has been a godsend and
I appreciate all who have offered their advice and assistance.  Through the
suggestions I've received here, I was finally able to isolate an
intermittent problem with our primary receiver to a faulty receiver (of
course, it helps when the darn thing actually breaks when you're standing in
front of it at the repeater site too!) and it's now on its way back to ACS
for a FREE out-of-warranty repair.  (Another BIG thanks to Gary at ACS for
going out of his way to be helpful!)  

Thankfully too, the Mark 4 is well documented and very easy to repair.  I
really expected a mess when I opened them up, knowing that they had taken a
good jolt via the phone line, but the repairs have been very easy and the
parts (except for the darned delay line!) have been easy to come by.  

Thanks it advance to all & 73,

Mike
WM4B
Kathleen, GA






 
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Re: [Repeater-Builder] Re: rlc-mot gated audio de-emph?

[Kevin Custer]

Here ya go:
http://www.repeater-builder.com/pdf/rlc_mot_rev_c.pdf

Kevin

skipp025 wrote:

>Is a diagram of the rlc-mot layout available anywhere? 
>
>thanks
>skipp 
>skipp025 at yahoo.com
>





 
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[Repeater-Builder] Standard RP70U Help or Manual

[w9mwq]

Need either a service manual on this or someone able to help me with 
it.  I was told that it worked before it was shipped, when I got it, 
it had some damage to the front of the radio, I see nothing broken 
inside, but it has no audio, transmit, or receiver sensitivity.  You 
can hear a slight audio from the speaker, and that is about it.  

Mathew








 
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Re: [Repeater-Builder] Delay line chip (DAD4096) for Kendecom Mark 4

[Dave VanHorn]

>Short of that, perhaps
>somebody has a relatively simple (and CHEAP) solution to the problem...
>either a way to delay the audio just a fraction or to decrease the attack
>time of the muting circuit so it cuts that short DTMF burst off.

Hmm..

That's within the range of something that could be done say in an 
Atmel AVR like a Mega-256.
Not a lot of code, but basically set up a huge buffer, sample using 
the on-board A/D, and output the samples, when they arrive, as PWM.
Could be a one-chip wonder.
The bad news is that it's a TQFP package.

Still, 8 mips at 5V, with no external components...

I'd be willing to give it a shot.

Does the 4096 have much going on other than a clock input, and audio 
in and out?










 
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Re: [Repeater-Builder] Delay line chip (DAD4096) for Kendecom Mark 4

[Q]

Might be able to wire in an NHRC DAD board...

Mike Besemer (WM4B) wrote:

>Greetings all,
>
>I'm restoring a lightning-struck Kendecom Mark 4 to use as a back-up
>repeater for our club.  (Actually, I'm restoring two of them, but one is
>already done and on line... but I digress.)  
>
>I've got the second machine up and running and it's been doing well on my
>bench for the past several days, but the one remaining problem I have is
>with the audio board.  The delay line (Reticon SAD4096) is bad, and will not
>pass audio.  
>
>I've jumpered around it so I now have a path for receiver and local audio to
>pass to the transmitter, but unfortunately this causes a problem with the
>autopatch.  Without the delay line, the first short burst of DTMF audio
>passes to the phone line and is JUST long enough to cause the autopatch to
>misdial about 99% of the time.  I know that this chip is pretty much
>non-existent any more but I thought that perhaps someone out there might
>just happen to have a spare they could part with. Short of that, perhaps
>somebody has a relatively simple (and CHEAP) solution to the problem...
>either a way to delay the audio just a fraction or to decrease the attack
>time of the muting circuit so it cuts that short DTMF burst off.
>
>As I said, this is our 2nd backup machine and other than the autopatch it's
>working fine, so I'm not willing to spend too much time or effort to get it
>100% capable, but if it's something relatively painless, I'll give it a try.
>
>
>As an aside, although I've been working professionally in electronics for
>the past 24 years or so (and been a ham for nearly 30) I've only recently
>become involved in repeater maintenance.  This group has been a godsend and
>I appreciate all who have offered their advice and assistance.  Through the
>suggestions I've received here, I was finally able to isolate an
>intermittent problem with our primary receiver to a faulty receiver (of
>course, it helps when the darn thing actually breaks when you're standing in
>front of it at the repeater site too!) and it's now on its way back to ACS
>for a FREE out-of-warranty repair.  (Another BIG thanks to Gary at ACS for
>going out of his way to be helpful!)  
>
>Thankfully too, the Mark 4 is well documented and very easy to repair.  I
>really expected a mess when I opened them up, knowing that they had taken a
>good jolt via the phone line, but the repairs have been very easy and the
>parts (except for the darned delay line!) have been easy to come by.  
>
>Thanks it advance to all & 73,
>
>Mike
>WM4B
>Kathleen, GA
>
>
>
>
>
>
> 
>
>  
>





 
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Re: [Repeater-Builder] Standard RP70U Help or Manual

[Jack Davis]

Check the volume and squelch controls.  They are very failure prone and can 
go bad quickly.  Check the position of the push button switches, it sounds 
like the PL may be on.  The volume and squelch controls push in and out, 
when the squelch control is in, there is a trim pot on the back of the 
control that sets the squelch, and the audio control is muted.

Jack
K6YC
- Original Message - 
From: "w9mwq" <[EMAIL PROTECTED]>
To: 
Sent: Friday, April 01, 2005 7:44 PM
Subject: [Repeater-Builder] Standard RP70U Help or Manual


>
>
> Need either a service manual on this or someone able to help me with
> it.  I was told that it worked before it was shipped, when I got it,
> it had some damage to the front of the radio, I see nothing broken
> inside, but it has no audio, transmit, or receiver sensitivity.  You
> can hear a slight audio from the speaker, and that is about it.
>
> Mathew
>
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
> 






 
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Re: [Repeater-Builder] Delay line chip (DAD4096) for Kendecom Mark 4

[Mike Morris WA6ILQ]

At 06:26 PM 4/1/05, you wrote:

>Greetings all,
>
>I'm restoring a lightning-struck Kendecom Mark 4 to use as a back-up
>repeater for our club.  (Actually, I'm restoring two of them, but one is
>already done and on line... but I digress.)
>
>I've got the second machine up and running and it's been doing well on my
>bench for the past several days, but the one remaining problem I have is
>with the audio board.  The delay line (Reticon SAD4096) is bad, and will not
>pass audio.
>
>I've jumpered around it so I now have a path for receiver and local audio to
>pass to the transmitter, but unfortunately this causes a problem with the
>autopatch.  Without the delay line, the first short burst of DTMF audio
>passes to the phone line and is JUST long enough to cause the autopatch to
>misdial about 99% of the time.  I know that this chip is pretty much
>non-existent any more but I thought that perhaps someone out there might
>just happen to have a spare they could part with. Short of that, perhaps
>somebody has a relatively simple (and CHEAP) solution to the problem...
>either a way to delay the audio just a fraction or to decrease the attack
>time of the muting circuit so it cuts that short DTMF burst off.
>
>As I said, this is our 2nd backup machine and other than the autopatch it's
>working fine, so I'm not willing to spend too much time or effort to get it
>100% capable, but if it's something relatively painless, I'll give it a try.
>
>
>As an aside, although I've been working professionally in electronics for
>the past 24 years or so (and been a ham for nearly 30) I've only recently
>become involved in repeater maintenance.  This group has been a godsend and
>I appreciate all who have offered their advice and assistance.  Through the
>suggestions I've received here, I was finally able to isolate an
>intermittent problem with our primary receiver to a faulty receiver (of
>course, it helps when the darn thing actually breaks when you're standing in
>front of it at the repeater site too!) and it's now on its way back to ACS
>for a FREE out-of-warranty repair.  (Another BIG thanks to Gary at ACS for
>going out of his way to be helpful!)
>
>Thankfully too, the Mark 4 is well documented and very easy to repair.  I
>really expected a mess when I opened them up, knowing that they had taken a
>good jolt via the phone line, but the repairs have been very easy and the
>parts (except for the darned delay line!) have been easy to come by.
>
>Thanks it advance to all & 73,
>
>Mike
>WM4B
>Kathleen, GA

Go to www.repeater-builder.com, then to the S-Com page.
Look at the later DADM board doc file (it's a PDF).

I'm 99% sure it's a drop-in replacement.  It requires +10 to
+15v of well-filtered DC at about 25ma, plus audio in and
out.  There is an extra pin that mutes the audio.  That pin
can optionally be wired to the RX COS output and can be
dip-switch selected to be active-low (less than 1vDC) or
active-high (over 3vDC).

A while back S-Com sold the design and rights to Brian
Martens KA9PMM at ICS.  Their board is identical except
for the name that is silkscreened onto it (basically, why
screw with success?).
See  and click on the "DADM"
link on the left.  Yes, it's about $70, but it's a proven product,
needs no development time, and what is your time and
energy worth?

Mike WA6ILQ





 
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Re: [Repeater-Builder] Delay line chip (DAD4096) for Kendecom Mark 4

[DCFluX]

I think you would be better with a smaller chip, like say a ATMEGA-32
and use an external serial ram chip.  And even so the chip has 4K of
ram I believe which should be enough for 450mS or better at a 8kHz
sample rate,

Don't go with PWM,  but rather use 8 pins of the controller to make a
resistor ladder DAC,  Like the old days before sound blaster when PCs
did sound with the Parallel port.

And the ADC needs to have the input biased to 2.5V or Half of VCC and
I recommend a Zener so the input doesn't go above 5 volts.

Running at the 10bits of the ADC will improve audio quality
signifigantly,  but you get screwed out of half the run time as the
memory would require words instead of bytes.

I may experiment with this intresting concept.




 
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