date:20050324






Good morning all,
We sell the Maggiore and when you team it
up with an Arcom 210 controller you can't
beat the audio. They work very well from
what I have seen. We never get them back
for repair. This is bad for us as we have a
repair business. Maggiore has a nice web 
site you can go visit and look around.
http://www.hiprorepeaters.com I think 
they
have info on all there stuff on there web
page. You can go look for your self what
they have to offer. Enjoy.
You are all ways better trying to buy new
if you can. Much cheaper in the long run.
Set it and forget it as they say.
73,
Dean Westbrook, EE,PE.














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Re: [Repeater-Builder] Re: Need VHF Rx Splitter






We have used the ARR PD receiver power
dividers (PD-2 and PD-4) they work well
for us on projects. The price is not bad at 
all.
73,
Dean Westbrook, EE,PE.













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[Repeater-Builder] MSR2000 UHF Amp question

2005-03-24 Thread Ken



Hi, I would like to know how to interface an RF amplifier to the
MSR2000 other than the original amp from Motorola.  I would like to
install a TPL or GE amp to the MSR2000 if possible.

Thanx

Ken







 
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[Repeater-Builder] MSF5000 Amp interface

2005-03-24 Thread Ken



Hi, I would like to know how to interface an RF amplifier to the
MSF5000 other than the original amp from Motorola.  I would like to
install a TPL or Micor amp to the MSF5000 if possible.

Thanx

Ken
http://www.hamrepeater.net







 
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Re: [Repeater-Builder] Re: Need VHF Rx Splitter







Hello All again,
I forgot you can do the following for 8
come down from your antenna to a PD-2
then out of the PD-2 to two PD-4's this 
will give you 8 receiver ports. For more we did this 
for
a local traffic service and a pile of monitors.
we came down from the antenna to a PD-4
out of the PD-4 to four PD-4's then we hooked
the two PD-4's into 16 receivers. Worked and
is working well for them. A note PD-4's and 
PD-2's
are made by ARR the same folks who make the
pre-amps. Good and fair price for a nice product.
73,
Dean Westbrook, EE,PE.














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Re: [Repeater-Builder] M57719N RF power module

2005-03-24 Thread Larry Taylor

On a Motorola Radio they adjust the Voltage to the second section of 
amplification to adjust power out in the module..
Larry Taylor KF6JBG
Home: [EMAIL PROTECTED]

- Original Message - 
From: Brent [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, March 23, 2005 6:34 PM
Subject: [Repeater-Builder] M57719N RF power module

 Anybody have any suggestions on varing the power on the M57719N Power
 Module?

 Would it be best to limit the rf input?

 Would it be ok to lower the vcc on the module?

 which would be the best approach?
 Brent

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[Repeater-Builder] Using Mobile Radios for Repeater Operation

2005-03-24 Thread Tony




I wanted to get some feedback from the community.  I am interested 
in building my first repeater utilizing mobile radios.  What are 
some of the benefits and disadvantanges of doing this?  Since I am 
new at this, I didn't really want to spend a whole heck of a lot on 
my first system.  Any thoughts or ideas are appreciated. Thanks!

Tony










 
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Re: [Repeater-Builder] 220 Mhz. repeater


russ wrote:

I use Maggiore and for 220 MHz what else would any one in there right mind use.


One of my 220 Micor conversions  Same great taste, less filling, and 
hears like a angry momma.
You get the famous Micor Squelch too...
Custom built and wired to plug into your controller for about $100 less 
than the competitors.

http://www.repeater-builder.com/rbtip/micor220conversion.html

Specifications of Repeater Builder Micor 220:
Sensitivity-
-122 to -124 dBm for 12 dB SINAD with optional preamp
-116 dBm for 12 dB SINAD basic sensitivity (-118 typical)
Remember now, this is a receiver with 5 large helical resonators in the 
front end.

Power-
25 watts continuous  (30 watts typical)
Adjustable from 10W to max. power for driving add on amp
Micor power leveling and VSWR protection still works

Crystals
2 PPM Temp Comp elements are available (extra)

For those who need to convert their specs to ours:
http://www.repeater-builder.com/pdf/dbm-to-microvolts.pdf

Comments welcome...

Kevin Custer








 
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Re: [Repeater-Builder] Using Mobile Radios for Repeater Operation

2005-03-24 Thread Mike Pugh


Take a look at this page http://www.mikepugh.net/repeater.html . I 
built it in 2001, and it's been running ever since. I can give you a lot 
of pointers if you want to do it this way. Email me direct.. Mike Pugh 
KA4MKG

Tony wrote:

 
 
 I wanted to get some feedback from the community.  I am interested 
 in building my first repeater utilizing mobile radios.  What are 
 some of the benefits and disadvantanges of doing this?  Since I am 
 new at this, I didn't really want to spend a whole heck of a lot on 
 my first system.  Any thoughts or ideas are appreciated. Thanks!
 
 Tony
 
 
 
 
 
 
 
 
 
 
  
 Yahoo! Groups Links
 
 
 
  
 
 
 
 
 





 
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Re: [Repeater-Builder] 220 Mhz. repeater







[EMAIL PROTECTED] wrote:

  
  
  
  You are all ways better trying to buy new if you
can. 
Much cheaper in the long run.
  Set it and forget it as they say.
  

I have many repeaters that I have built from used equipment for myself
and others. 
I feel these have been much cheaper to establish and maintain than new.
I also have bought new repeaters from Kendecom, Spectrum, and others.
I have had much more trouble with them than converted (or not)
commercial gear.

The new is gone the minute you unbox the repeater. (everyone drives a
used car)

Kevin Custer














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Re: [Repeater-Builder] Using Mobile Radios for Repeater Operation

2005-03-24 Thread Q


You may want to look into converting a surplus commercial radio to a 
repeater,its actually cheaper than wasting a couple of ham transcievers! 
It will out perform any ham grade radios and you wont need to upgrade 
later. I have converted GE Custom MVP's,Mastr ExecII's and MastrII's to 
repeaters,they are inexpensive and super performers. I have a few for 
sale from time to time. Also look at the sponsoring website,there is a 
wealth of info there as well as complete repeaters for sale. What band 
are you planning to use? Your biggest expense wont be the repeater,it 
will be the duplexer,antenna and feedline!

Mike Pugh wrote:

Take a look at this page http://www.mikepugh.net/repeater.html . I 
built it in 2001, and it's been running ever since. I can give you a lot 
of pointers if you want to do it this way. Email me direct.. Mike Pugh 
KA4MKG

Tony wrote:

  

I wanted to get some feedback from the community.  I am interested 
in building my first repeater utilizing mobile radios.  What are 
some of the benefits and disadvantanges of doing this?  Since I am 
new at this, I didn't really want to spend a whole heck of a lot on 
my first system.  Any thoughts or ideas are appreciated. Thanks!

Tony










 



  






 
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RE: [Repeater-Builder] 220 Mhz. repeater

2005-03-24 Thread Paul Finch






Kevin,

I say 
your correct here, I have never bought a "new" repeater. I fell into a 
great deal, a friend in the two way business GAVE me 4 new in the box Kenwood 
TKR-850 repeaters. Really good friend, worked for his Dad in the two way 
industry for a long time but till then I always built my own repeaters out of 
junk. That is the fun part of Ham radio. By the way, to keep the 
coordination on a 440 frequency I put one of the Kenwood's on-line on a 
temporary basis till I get time to build one out of junk. The Kenwood's 
are going in service on my tower as a commercial trunk 
system.

Withthe Kenwoodnow running I still havetwo Ham 
repeaters built from Johnson mobile radios, they have been running for more than 
7 years with no problems. I have a GE Mastr II repeater set up (almost 
complete) on the 2 meter frequency but as long as the Johnson's are running I 
can't see putting the time, what little I have, into finishing 
it!

Paul


  -Original Message-From: Kevin Custer 
  [mailto:[EMAIL PROTECTED]Sent: Thursday, March 24, 2005 8:25 
  AMTo: Repeater-Builder@yahoogroups.comSubject: Re: 
  [Repeater-Builder] 220 Mhz. repeater[EMAIL PROTECTED] wrote:
  

You are all ways better trying to buy new if you can. 
Much cheaper in the long run.
Set it and forget it as they 
  say.I have many repeaters that I have 
  built from used equipment for myself and others. I feel these have 
  been much cheaper to establish and maintain than new.I also have bought 
  new repeaters from Kendecom, Spectrum, and others.I have had much more 
  trouble with them than converted (or not) commercial gear.The new is 
  gone the minute you unbox the repeater. (everyone drives a used 
  car)Kevin Custer













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Re: [Repeater-Builder] Kenwwod single band transcievers as remote (CONTROLLED) inputs

2005-03-24 Thread Larry Rowe

Well, for things like this, I have built myself a serial snooper. Its basically a serial cable that has the output split so that you can plug it in as usual to whatever you are hooking together and then the 3rd port goes to another computer running Telix or some terminal. Then you can operate the device as usual and see the control commands come out in the terminal. After some playing around you can figureout their scheme and what you need to send it to do what. I have used this to figure out proprietary formats for lots of things and it works well. Most reecently there was a telephone call box that used a computer with the companys own software to control it. I wanted to control it with a PIC instead of a PC so I asked the company for their commands and formats etc.which they would not give. So, I snooped and in less than a day I had thrown their software in the trash and my PIC was working great. If I were you I would
snoop on Doug Halls two serial lines going into the Kenwood radio. I am sure you can figure out what you need to send that way. Sounds like a great problem, if I had one of those radios I would try it myself. Hope this helps.

Larry Rowe, N8RDT[EMAIL PROTECTED] wrote:
To overcome Jack Gerritsen and his constant jamming of our repeater Ihave placed two Kenwood radios on the hill. I interrupted my main UHFrepeaters receiver to the controller with a C.A.T. RLS-1000 3 portmixer and placed the Kenwood radios on the other two ports. TheKenwood radios (TM-241 144MHz and TM-331 220MHz) are each splittingtheir discriminator audio out of the mic connectors on the radios intoboth a TP-3200 Tone panel and a RCL-MOT squelch module. The audio fromthe RLC-MOT feeds the RLS-1000 mixer and all works very well. Therepeater users know that when Jack starts in with his [EMAIL PROTECTED] I cansend a close command to the RLS-1000 to mute the audio coming fromthe UHF port and Jack is gone.Jack has been quit frustrated and so he scans around the bands nowlooking for our users on the inputs and finds them and starts back
inon them again. Once the Kenwood radios have been compromised I have tomake another trip to the hill and change the Kenwood radiofrequencies. I want to do this remotely and I don't want to have tobuy another Doug Hall RBI-1. I think I can use a serial output from my controller (a LinkcommRLC-3) to a basic stamp and making the controller think it iscommanding a RBI-1. My problem is that I don't know anything about howto communicate to the Kenwood radios. Obviously Doug Hall figured itout but he does not want to share this info with me. I don't blame himas he would rather sell me another RBI-1 and I don't have the patentsor the equipment to try and decrypt the stream that he is sending fromthe RBI-1 to the radios. The folks from C.A.T. also figured it out andtried to put it into their CAT-700 repeater controller but found a bigconflict with their implementation so the had to abandon it. Theydon't want to share any detail
either.Has anyone out here got the answers I am looking for? I have learnedthat the Kenwood radio is a typical single band radio with the micplugged into it and it works accordingly but when the Kenwood RC-10 orRC-20 was plugged in the mic connector it supplied a voltage to pin 6of the mic connector changing the function of the up/down pins in themic connector to serial in/out. I need to know what baud rate I needto send the radio data. I need to know the format that the radio isexpecting. I need to know the parameters that the radio is expecting. I believe that someone out here has experimented with thisfunctionality it is way too cool. Yahoo! Groups Links* To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/* To unsubscribe from this group, send an email to:[EMAIL PROTECTED]* Your use
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Re: [Repeater-Builder] Desense im guessing?

2005-03-24 Thread Mark Wilson


I had bad desense on a uhf msf 5000 with a cellwave
526 duplexer and aar preamp.
Whenever I added the preamp I had bad desense. Went
crazy adding filtering in the tx, rx and duplexer
tuning.

After days of playing around found I had a bad jumper
cable between the repeater and ant that was generating
noise. Replaced the cable and everything worked fine
with no pad.

Mark
KB1IOZ

--- Joe [EMAIL PROTECTED] wrote:
 
  Actually, try somewhere between .5 and 2dB BEFORE
 the preamp, you might be surprised that effective
 sensitivity will go UP an d desense will go DOWN.
 
 Joe
 
  Dave Baughn [EMAIL PROTECTED] wrote: 
  
 =
 
 Try adding a 10 dB pad AFTER the preamp. Should not
 affect sensitivity but may help your desense. AAR
 preamp has more gain than necessary.
 
 
 
 
 
  
 Yahoo! Groups Links
 
 
 [EMAIL PROTECTED]
 
  
 
 
 
 



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[Repeater-Builder] Re: MSR2000 UHF Amp question



Hi Ken, 

You can retrofit a number of amplifier solutions,  
some are much more expensive like the low drive 
versions of the tpl amps. 

If you do it yourself... worried about low costs, 
just track down one of the common 100mW drive - 
about 15 watt output modules and build it into 
a box that suits your needs. Pad the extra input 
down if required. Don't run the module to hot, 
ie heat sink it well. 

You can repair your original PA, I can sell you 
the required parts for about $80 (Email me direct 
for more information) and you supply about 3.5 
hours of serious repair labor. 

You can find someone to properly fix your PA and 
stand behind the repair should more problems 
occur. 

You can also track down a surplus matching (drive 
level) PA, the only non tpl out of the box 
solution I've actually seen working is a Milcom 
unit I received with a used msr system purchased 
some years back. 

People have been known to use the a$$-end of a 
surplus mobile radio, which has the proper amp 
stage drive levels. ... even so far as to metal 
saw off the unwanted portion of the donor radio.

   

The key to extended MSR-2000 amplifier operation 
is heat control. Run the PA at 45 to 65 watts 
output for lock-to-talk (long winded) operation, 
and/or put some decent air movement through the 
cab (up and out the top vents) if you desire more 
than 60 watts regular repeater output.

A first sign of trouble is when the amplifier 
early A version low-pass filter unsolders itself. 
This not so cute problem is often traced back to 
high power operation into reactive loads (antenna
systems without circulators/isolators) with 
reflected energy (power) appearing back at the Low 
Pass Filter as high currents/voltages... hot spots. 

Hope that helps 

cheers, 
skipp 
skipp025 at yahoo.com 
www.radiowrench.com 


 Ken [EMAIL PROTECTED] wrote:
 
 Hi, I would like to know how to interface an RF amplifier to the
 MSR2000 other than the original amp from Motorola.  I would like to
 install a TPL or GE amp to the MSR2000 if possible.
 
 Thanx
 
 Ken







 
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[Repeater-Builder] Re: Help with Deviation

2005-03-24 Thread Rich Misener



Bryan,

Your test results are right on the money.  Whoever told you to set 
it at 4.5 kHz was referring to the max deviation of the TX.  This is 
the level that you set the IDC or clipper to (not sure what it is 
called in the MASTR III).  4.5 is a good level and will prevent the 
deviation from overshooting the 5 kHZ max.

Dick---N7ZH

--- In Repeater-Builder@yahoogroups.com, Bryan Low [EMAIL PROTECTED] 
wrote:
 
 
 Hello all
 
 Being fairly new to the radio world, I am hoping to get some info 
on 
 deviation.  I operate MASTR III stations in the 150 band for 
public 
 safety.  All of my freq's are currently licensed as wideband.
 
 I understand that the max deviation given these conditions is 5 
 kHz.  I've been told to set my stations for 4.5 kHz just to be 
 safe in case anyone is listening.  However, when I set a new 
 station up according to the manual, I end up with deviation around 
 3.75 kHz--using a 1 kHz test tone modulated at 3 kHz deviation, 
and 
 a channel guard modulated at .75 kHz.  Is this correct or should I 
 be aiming for the 4.5 kHz level?
 
 It appears there are two adjustments in the MASTRUTIL program that 
 effect this.  The TX pot and the Repeater Gain pot.  Not sure what 
 the differences between the two are.
 
 Any basic information on this subject would be appreciated, or 
 instructions on how to go about setting these levels to get max 
 output in the MASTRIII would be great.
 
 Thanks!
 
 -Bryan







 
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Re: [Repeater-Builder] Using Mobile Radios for Repeater Operation

2005-03-24 Thread bradley glen




 
 
 
 Hi

All my 6 linked uhf ham system are made up of
commercial.

General rule of thumb:If you use chrystal-generally
have narrow front ends so the receive is better
protected.The older synthesised radios of the 80's
also have good frontends.
Be careful of using han gear as they are nowdays very
wide to cater for hams wanting to listen to everything
in one radio-trade-off.
 The commercial unit have a good spec and for their
enviroment are built a little tougher.
Regards

Brad ZS5WT

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Re: [Repeater-Builder] Re: 220 Mhz. repeater


At 3/23/2005 05:55 PM, you wrote:


Re: Maggiore 220 Receivers

I'll second (or third that)... I just put
another on the air.  The only thing I don't
like about most of these type receivers is
how they offer up the local speaker audio
as the input to the repeater controller.

So what happens if you adjust the local speaker volume?  Does it mess up 
the repeat audio level?

Bob NO6B






 
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Re: [Repeater-Builder] Kenwwod single band transcievers as remote (CONTROLLED) inputs


At 3/24/2005 06:54 AM, you wrote:
Well, for things like this, I have built myself a serial snooper.  Its 
basically a serial cable that has the output split so that you can plug it 
in as usual to whatever you are hooking together and then the 3rd port 
goes to another computer running Telix or some terminal.  Then you can 
operate the device as usual and see the control commands come out in the 
terminal.  After some playing around you can figure out their scheme and 
what you need to send it to do what.  I have used this to figure out 
proprietary formats for lots of things and it works well.  Most reecently 
there was a telephone call box that used a computer with the companys own 
software to control it.  I wanted to control it with a PIC instead of a PC 
so I asked the company for their commands and formats etc. which they 
would not give.  So, I snooped and in less than a day I had thrown their 
software in the trash and my PIC was working great.  If I were you I would 
snoop on Doug Halls two serial lines going into the Kenwood radio.  I am 
sure you can figure out what you need to send that way.  Sounds like a 
great problem, if I had one of those radios I would try it myself.  Hope 
this helps.


Only problem is I don't think the controller-to-RBI communications is a 
regular serial protocol.  I don't know much about it (though I'm about to - 
just ordered some synthesizers for a project at work that use it).  I 
believe it's SPI, using 3 lines to transfer data (data, clock  
ground).  In that case you wouldn't be able to read it using a standard 
serial port.  Sounds like you'd need some sort of logic analyzer.  One 
possibility might be to use a PC's parallel port  some VB programming to 
sample  record the data line on every clock pulse.

Regarding use of remote bases as alternate inputs: I just hope you choose 
your frequencies well.  I've lost track of how many times a 147.435 
remote camped on or near an input or link frequency to my system, 
effectively shutting it down.

Bob NO6B


Larry Rowe, N8RDT
[EMAIL PROTECTED] wrote:

To overcome Jack Gerritsen and his constant jamming of our repeater I
have placed two Kenwood radios on the hill. I interrupted my main UHF
repeaters receiver to the controller with a C.A.T. RLS-1000 3 port
mixer and placed the Kenwood radios on the other two ports. The
Kenwood radios (TM-241 144MHz and TM-331 220MHz) are each splitting
their discriminator audio out of the mic connectors on the radios into
both a TP-3200 Tone panel and a RCL-MOT squelch module. The audio from
the RLC-MOT feeds the RLS-1000 mixer and all works very well. The
repeater users know that when Jack starts in with his [EMAIL PROTECTED] I can
send a close command to the RLS-1000 to mute the audio coming from
the UHF port and Jack is gone.

Jack has been quit frustrated and so he scans around the bands now
looking for our users on the inputs and finds them and starts back in
on them again. Once the Kenwood radios have been compromised I have to
make another trip to the hill and change the Kenwood radio
frequencies. I want to do this remotely and I don't want to have to
buy another Doug Hall RBI-1.

I think I can use a serial output from my controller (a Linkcomm
RLC-3) to a basic stamp and making the controller think it is
commanding a RBI-1. My problem is that I don't know anything about how
to communicate to the Kenwood radios. Obviously Doug Hall figured it
out but he does not want to share this info with me. I don't blame him
as he would rather sell me another RBI-1 and I don't have the patents
or the equipment to try and decrypt the stream that he is sending from
the RBI-1 to the radios. The folks from C.A.T. also figured it out and
tried to put it into their CAT-700 repeater controller but found a big
conflict with their implementation so the had to abandon it. They
don't want to share any detail either.

Has anyone out here got the answers I am looking for? I have learned
that the Kenwood radio is a typical single band radio with the mic
plugged into it and it works accordingly but when the Kenwood RC-10 or
RC-20 was plugged in the mic connector it supplied a voltage to pin 6
of the mic connector changing the function of the up/down pins in the
mic connector to serial in/out. I need to know what baud rate I need
to send the radio data. I need to know the format that the radio is
expecting. I need to know the parameters that the radio is expecting.

I believe that someone out here has experimented with this
functionality it is way too cool.






 
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Re: [Repeater-Builder] Desense im guessing?


At 3/24/2005 08:25 AM, you wrote:

I had bad desense on a uhf msf 5000 with a cellwave
526 duplexer and aar preamp.
Whenever I added the preamp I had bad desense. Went
crazy adding filtering in the tx, rx and duplexer
tuning.

After days of playing around found I had a bad jumper
cable between the repeater and ant that was generating
noise. Replaced the cable and everything worked fine
with no pad.

Mark
KB1IOZ

Let me guess: the bad jumper was RG-8 or RG-213  was between the 
duplexer  antenna?

Bob NO6B






 
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Re: [Repeater-Builder] M57719N RF power module

2005-03-24 Thread Tony Faiola


Hello Brent:

I have been working with some of these bricks from Toshiba and 
Mitsubishi.  If you ordered the module or are ordering this module from 
RF Products, buy the specifications sheet ($1.50) with the module.

The specification sheet has much valuable data in it including a power 
input verses power output curve, etc.

It's usually easier to lower an input stage than the power module (drive 
level) using lower voltage or low power pad techniques.

Looking at the aforementioned spec sheet curves, they show you what 
power output you can expect verses power input.

You do need to be careful of the power module output spectral quality 
with these procedures.

Hope these few tips help.

Ciao, Tony K3WX

Brent wrote:
 Anybody have any suggestions on varing the power on the M57719N Power
 Module?
 
 Would it be best to limit the rf input?
 
 Would it be ok to lower the vcc on the module?
 
 which would be the best approach?
 Brent
 
 
 
 







 
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Re: [Repeater-Builder] 220 Mhz. repeater


Danny R. Goodrum wrote:

 Russ,
  So whats the cost of this type of repeater? I know its only money ,but I
 still like to keep most of it at home..
  Danny

I think we should really ignore this russ guy. I plonked him, I just 
wish everybody else would too.


We have all heard enough from you! If you have nothing positive to say be
quite.
Russ, W3CH.

quiet, not quite|cP
-- 
Jim Barbour
WD8CHL





 
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[Repeater-Builder] Repeat Audio: using terminated speaker audio



Hi Bob, 

In the stock configuration, there is no 
local speaker. What you would call the 
speaker audio amplifier output is dumped 
into an 18 ohm resistor (of proper wattage). 

The above practice is common with many kit 
and non commercial receiver boards used in 
repeater service. Again, this is one area 
where Spectrum does something very well, 
supplying the repeater audio from buffered 
gated op amps not related to the speaker amp. 

Hamtronics and Maggoire also offer discriminator 
audio with Hamtronics gating the main speaker 
audio off before the audio amp circuit (making 
the high side of the volume pot a useable audio 
tap location. Maggiore actually gates the 
LM-380 ic directly, meaning the volume pot high 
side is not gated. 

I used the Maggoire terminated audio tap in the 
just completed 220 project after measuring the 
distortion and bandwidth with a suspect eye 
(and test equipment).  I was pleasantly surprised 
how well the circuit functions with minimal 
disortion at minimal to mid range volume settings. 
Another surprise is how well the discriminator 
circuit of the Maggoire Receiver preforms 
(better than some high-end receivers). 

If you wanted a local speaker (which is 
actually undesired in most cases), you'd 
have figure out something out, which would 
work for your specific requirements.

Maggoire places the volume and squelch pots 
down on the pc board, which I feel is one 
of the better locations anyway.  Pots in view 
and access of the general public, get turned 
(in the middle of the night) unless you lock 
them down hard with a nut-fixed control pot.

If you obtain your repeater audio from 
the available discriminator source, you 
could easily use the speaker amp section 
for it's normal application ie... local 
speaker audio. 

Terminated speaker audio is not a big deal, I 
did it for some years when the main repeater 
box was a Micor Mobile. At the time, it was 
very easy to do and the sub tone filter really 
helps. I trail the current Maggoiree circuit 
with a sub-tone (PL or ctcss) filter before the 
controller input. Works great, less filling...

cheers,
skipp 

 Bob Dengler [EMAIL PROTECTED] wrote:
 At 3/23/2005 05:55 PM, you wrote:
 
 
 Re: Maggiore 220 Receivers
 
 I'll second (or third that)... I just put
 another on the air.  The only thing I don't
 like about most of these type receivers is
 how they offer up the local speaker audio
 as the input to the repeater controller.
 
 So what happens if you adjust the local 
 speaker volume?  Does it mess up 
 the repeat audio level?
 
 Bob NO6B







 
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Re: [Repeater-Builder] Repeat Audio: using terminated speaker audio


skipp025 wrote:

 
 Hi Bob, 
 
 In the stock configuration, there is no 
 local speaker. What you would call the 
 speaker audio amplifier output is dumped 
 into an 18 ohm resistor (of proper wattage). 
 
 The above practice is common with many kit 
 and non commercial receiver boards used in 
 repeater service. 

Everyone sing along: M-I-C--K-E-Y... (you know the rest).

snip
 If you wanted a local speaker (which is 
 actually undesired in most cases), you'd 
 have figure out something out, which would 
 work for your specific requirements.

A local speaker is basically a MUST for any good repeater. I insist on 
finding a way to do it, and a local mic is #2 on the list.
I ALWAYS take repeat audio BEFORE the original volume control, and if 
that doesn't work, I find a way to MAKE it work. It's too vital a 
diagnostic tool not to have it.

-- 
Jim Barbour
WD8CHL





 
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Re: [Repeater-Builder] 220 Mhz. repeater


Kevin Custer wrote:

 [EMAIL PROTECTED] wrote:
 
 You are all ways better trying to buy new if you can.
 Much cheaper in the long run.
 Set it and forget it as they say.
 
 
 
 I have many repeaters that I have built from used equipment for myself 
 and others. I feel these have been much cheaper to establish and 
 maintain than new.
 I also have bought new repeaters from Kendecom, Spectrum, and others.
 I have had much more trouble with them than converted (or not) 
 commercial gear.
 
 The new is gone the minute you unbox the repeater.  (everyone drives a 
 used car)
 
 Kevin Custer
 

Kevin is correct. Buying new is NOT always the way to go. What would you 
rather own, a brand new Yugo, or a 10 year old McLaren F1 Indy? Or a 10 
year old Rolls maybe?
The made-for-amateur stuff needs to be 'babysat' constantly, while the 
Motorola and GE stuff just runs.
-- 
Jim Barbour
WD8CHL





 
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Re: [Repeater-Builder] Repeat Audio: using terminated speaker audio




skipp025 wrote:

Another surprise is how well the discriminator 
circuit of the Maggoire Receiver preforms 
(better than some high-end receivers).


What was the basic 12 dB sinad sensitivity of your Maggiore?

If you wanted a local speaker (which is 
actually undesired in most cases), you'd 
have figure out something out,


How is one to test for desense if you don't have a local speaker?  When 
you shut off the transmitter with the PTT Disable Switch, what does one 
listen to?

Kevin





 
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Re: [Repeater-Builder] 220 Mhz. repeater






Hello All,
I do not know about some of the bands that are
posted. I do know that with Kenwood, Kenwood
Systems and Maggiore you get a two year wan tee.
With Motorola, Midland and Johnsonyou get a 1 
year.
We do not carry any thing else. I am not in radio
sales but I do know ifI buy a new car it is going 
to
get fixed for a while when it is new. I know with
the above repeaters I will get them fixed and I
will not pay for parts or labor for some time.
I am not a Ham and do not build repeaters from
junk as stated earlier. I do manage four shops 
that
puts together a lot of repeater for public safety
and business folks. well over 200 a year at this
point. I stand by my statement. Buy new. Be 
happy.
Very best,
Dean Westbrook, EE,PE.














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RE: [Repeater-Builder] 220 Mhz. repeater

2005-03-24 Thread Paul Finch






Buy junk, build good Ham 
repeater at fraction of cost, be happy.

Paul


  -Original Message-From: [EMAIL PROTECTED] 
  [mailto:[EMAIL PROTECTED]Sent: Thursday, March 24, 2005 2:49 
  PMTo: Repeater-Builder@yahoogroups.comSubject: Re: 
  [Repeater-Builder] 220 Mhz. repeater
  Hello All,
  I do not know about some of the bands that are
  posted. I do know that with Kenwood, Kenwood
  Systems and Maggiore you get a two year wan 
tee.
  With Motorola, Midland and Johnsonyou get a 1 
  year.
  We do not carry any thing else. I am not in 
  radio
  sales but I do know ifI buy a new car it is going 
  to
  get fixed for a while when it is new. I know 
  with
  the above repeaters I will get them fixed and I
  will not pay for parts or labor for some time.
  I am not a Ham and do not build repeaters from
  junk as stated earlier. I do manage four shops 
  that
  puts together a lot of repeater for public 
  safety
  and business folks. well over 200 a year at 
this
  point. I stand by my statement. Buy new. Be 
  happy.
  Very best,
  Dean Westbrook, EE,PE.
  













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Re: [Repeater-Builder] 220 Mhz. repeater






Hey Kevin,
I am not saying it is bad to buy older stuff.
Just if you do not have the test equipment
or know all the ins and outs you mite be
better buying something new with a warn tee.
I am real sure your converted stuff works
just fine. I see lots of folks come in and out
of our shop each day buying parts for all the
GE and Motorola stuff but they can fix the
older stuff. So yes in the long run a new 
repeater
on 220 is not a bad idea at all. You guys can 
pick
on Russ all you want but he has 26 Maggiore
repeater on the air at last count and they all
work. So I think on this one he knows the 
Maggiore
stuff. Let us not forget his wife and father in 
law
has dealerships for the big brand radio's and he
can sure buy them at cost. Lord know we have
tried to talk him into a few things over the 
years.
Plus he can afford to buy any thing. He buys 
Maggiore.
Why? Because they do not break down! when you 
have
a very large on the air system like his you can't run 

to it ever. He does not! So you guys who say he has no idea 

are wrong! On 220 the Maggiore works well. Kevin your 

Micors I am sure works well. I have even seen the 
Master
II's work well on 220 but if I did not have the test 
equipment
and the know how. I would buy a new repeater. If I 
needed
220 that really only leaves Maggiore for a good off the 
shelf
repeater that works day in and day out.
73,
Dean Westbrook, EE,PE.














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[Repeater-Builder] TRW PT8874






anyone know therecomended 
amount of drive for this Transistor.
I have had no luck finding a 
datasheet for it yet..
Brent













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Re: [Repeater-Builder] 220 Mhz. repeater







[EMAIL PROTECTED] wrote:

  
  
  
  I am not a Ham and do not build repeaters from
junk as stated earlier.
  

Please realize that this list is for hams as well as commercial folks,
so don't try to jam your 'always buy new' theory down anyone's throat
here.
I can guarantee you that the ham repeaters around here will blow away
all of the commercial installations. Hams are MUCH harder to please
and demand better performance. My 2 meter system and my 440 system
covers all of my County, something that cannot be said for the
multi-thousand dollar County radio installation.

  I do know that with Kenwood, Kenwood Systems and
Maggiore you get a two year wan tee.


Also, the topic here is 220 MHz repeaters. Does Kenwood, Motorola,
Midland, and Johnson build 220 MHz. ham repeaters?
If not, it really doesn't matter how damn good their (wan tee) is.

Kevin Custer














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Re: [Repeater-Builder] Repeat Audio: using terminated speaker audio


At 3/24/2005 12:09 PM, you wrote:

 If you wanted a local speaker (which is
 actually undesired in most cases), you'd
 have figure out something out,
 

How is one to test for desense if you don't have a local speaker?  When
you shut off the transmitter with the PTT Disable Switch, what does one
listen to?

None of my sites have room to spare for a local speaker, so I never 
included it in any of my systems.  Instead, I built a test/breakout box out 
of an old Motorola speaker that inserts inline between the radio  
controller.  It has its own LM380 audio amp to drive the speaker from the 
discriminator audio passing through it,  can be switched to gate audio 
from COS, CTCSS or no gating.

Bob NO6B






 
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Re: [Repeater-Builder] Repeat Audio: using terminated speaker audio


Bob Dengler wrote:

 At 3/24/2005 12:09 PM, you wrote:
 
 
If you wanted a local speaker (which is
actually undesired in most cases), you'd
have figure out something out,


How is one to test for desense if you don't have a local speaker?  When
you shut off the transmitter with the PTT Disable Switch, what does one
listen to?
 
 
 None of my sites have room to spare for a local speaker, so I never 
 included it in any of my systems.  Instead, I built a test/breakout box out 
 of an old Motorola speaker that inserts inline between the radio  
 controller.  It has its own LM380 audio amp to drive the speaker from the 
 discriminator audio passing through it,  can be switched to gate audio 
 from COS, CTCSS or no gating.
 
 Bob NO6B

That'll work too!
-- 
Jim Barbour
WD8CHL





 
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[Repeater-Builder] Re: Repeat Audio: using terminated speaker audio



 Kevin Custer [EMAIL PROTECTED] wrote: 
 What was the basic 12 dB sinad sensitivity of 
 your Maggiore?

Don't have it exact in memory, but I'll try to 
refer back to the log notes and see what I wrote 
down. Better than -116dBm real-world is a value 
first comming back (in my short-term memory) for 
the 12 dB Sinad value. 

 If you wanted a local speaker (which is 
 actually undesired in most cases), you'd 
 have figure out something out,
 

 How is one to test for desense if you don't have 
 a local speaker?  

Desense tests are not restricted to using the 
speaker output connections. Local speaker audio
power amps contribute distortion, which doesn't 
really need to be worried about if the speaker 
amp is not part of the actual repeater circuit. 

Some of those cute little repco and Neulink 
receiver boards I mentioned a while back, don't 
even have an onboard speaker audio power amp. 

 When you shut off the transmitter with the 
 PTT Disable Switch, what does one listen to?
 Kevin 

Doesn't your 8920a have an available speaker 
output? I also have speaker amplifiers built into 
some of my Sinad Meters plus the trusty tribble 
size (9V battery powered) type portable speaker 
amp from Radio Shaft (Shack).  

My main concern about local speaker audio and 
squelch settings is keeping those magic fingers 
off the front panel controls, added distortion 
of some of the circuit (ie the LM-380). Plus 
the current requirements of the audio power amp 
section at solar and limited power sites. 

Once the repeater is done and installed at the 
site, local speaker audio should be off anyway.

cheers, 
skipp 







 
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[Repeater-Builder] Great eBay Deal? - 110 watt Mastr II VHF multiplier mobile


I have nothing to do with this auction, I just seen it and thought I 
would pass it on.
Please don't spoil it and bid, the damn BIN is very fair and he claims 
to have a TON of them, so be patient, and don't be tempted to bid 
because if this dude sees he can get $50 for them, he will

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemcategory=296item=5762888962
ebay item = 5762888962

Kevin Custer






 
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[Repeater-Builder] Re: 220 Mhz. repeater



 Jim B. [EMAIL PROTECTED] wrote:
 Kevin is correct. Buying new is NOT always the 
 way to go. 

One must properly weigh all the options for it's 
been said that hams can be frugle. 

 What would you rather own, a brand new Yugo, or a 10 
 year old McLaren F1 Indy? Or a 10 year old Rolls maybe?
 The made-for-amateur stuff needs to be 'babysat' 
 constantly, while the Motorola and GE stuff just runs.
 Jim Barbour
 WD8CHL 

Don't know what planet you're on Jim, but your 
above statement makes it look like you're living 
in dreamland. Much of the Made-For-Amateur gear 
is pretty nice stuff for the price. 

Try the decafe Jim... 

cheers, 
skipp 







 
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Re: [Repeater-Builder] 220 Mhz. repeater






No they do not build 220 but Maggiore does.
BTW we have built systems that work across
whole states. But you are right I guess and 
I do not sell used stuff like you do so as I
cannot speak on this I will be silent.
73 Dean Westbrook, EE,PE.













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Re: [Repeater-Builder] TRW PT8874

2005-03-24 Thread Larry Kemper






Brent
The PT8874 is 40 watts out and has a gain of 4.5 db 
according to my old TRW listing. Should be able to figure that one out but 
I gave up on math like a bad girl friend years ago.


WA0VUSLarry KemperMuscatine, 
Iowa

[EMAIL PROTECTED]













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Re: [Repeater-Builder] TRW PT8874

2005-03-24 Thread Larry Kemper






Brent I found another brochure that says 12 watts 
in for 40 watts out.

WA0VUSLarry KemperMuscatine, 
Iowa

[EMAIL PROTECTED]













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Re: [Repeater-Builder] Re: Repeat Audio: using terminated speaker audio







skipp025 wrote:

  
Kevin Custer [EMAIL PROTECTED] wrote: 
What was the basic 12 dB sinad sensitivity of 
your Maggiore?

  
  
Don't have it exact in memory, but I'll try to 
refer back to the log notes and see what I wrote 
down.


Thanks I'd appreciate knowing the real world number here.

  
When you shut off the transmitter with the 
PTT Disable Switch, what does one listen to?
Kevin 

  
  
Doesn't your 8920a have an available speaker 
output?


It does.

   I also have speaker amplifiers built into 
some of my Sinad Meters plus the trusty tribble 
size (9V battery powered) type portable speaker 
amp from Radio Shaft (Shack).  

My main concern about local speaker audio and 
squelch settings is keeping those magic fingers 
off the front panel controls, added distortion 
of some of the circuit (ie the LM-380). Plus 
the current requirements of the audio power amp 
section at solar and limited power sites. 

Once the repeater is done and installed at the 
site, local speaker audio should be off anyway.


I see. It wasn't that you weren't using a speaker to test for desense,
you simply don't include one or a way to connect one in every instance,
and that's fine.

I prefer to have a way of listening to my receiver with an available
speaker. Like others, I have sites that have no room for a dedicated
speaker to reside with the repeater. Many times I simply take my Micor
speaker from my truck and use it on the repeater. I have it configured
with an 1/8 inch plug on the end to connect to my Japanese mobile rig.
All of my machines either have a dedicated speaker for monitoring or a
1/8 inch speaker jack for my speaker. Even my remote receiver sites
that use Hamtronics receivers (R144's) have a speaker jack as I don't
use the internal amp for anything other than the speaker.

Kevin Custer
















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[Repeater-Builder] Re: 220 Mhz. repeater



Re: 220 Mhz. repeater

My goodness... there's a lot of love and 
good cheer going around the group today. 

Onward.. 

I don't believe the below mentioned mfgrs always 
spec the specific application, but Midland Does 
or did make 220 Repeater Gear. Motorola has been 
known to spec and supply repeater gear in odd 
bands, but since I'm not in their loop anymore I 
can't tell you what they currently offer overseas 
at this time. 

On more than one occassion, I've serviced 
some really wild repeaters on large cruise 
ships from Europe and Asia. Other parts of the 
world have and use ham and commercial bands we 
don't even know about and Motorhead makes or 
made repeaters for these ranges. 

I've got the software for and had a source for 
a Motorola repeater on 220 MHz range factory 
built repeater. Serviced and sent it back 
to Asia a few years ago. 

Don't know if EF Johnson has resurfaced to 
offer after the factory move.

If anyone VERY SERIOUSLY wants a new Kenwood 
220 Ham Repeater New, Email me off the list 
I'm a can do kind of guy...  

cheers,
skipp 

 Kevin Custer [EMAIL PROTECTED] wrote:
 Does Kenwood, Motorola, Midland, and Johnson 
 build 220 MHz. Ham Repeaters? If not, it really 
 doesn't matter how damn good their (wan tee) is.
 Kevin Custer







 
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Re: [Repeater-Builder] 220 Mhz. repeater







[EMAIL PROTECTED] wrote:

  
  
  
  No they do not build 220 but Maggiore does.
  

I have nothing against Maggiore. Paul builds a fine product at a very
fair price, but he's not the only game in town when it comes to 220.

  BTW we have built systems that work across whole
states.
  

And I have systems running that work across many states, and bigger
than NJ or DE by many times over. All built with 'used' stuff.
http://www.kuggie.com/target/
Kevin Custer

















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[Repeater-Builder] that darn speaker audio



 Kevin Custer [EMAIL PROTECTED] wrote:
 I prefer to have a way of listening to my 
 receiver with an available speaker.  Like 
 others, I have sites that have no room for 
 a dedicated speaker to reside with the 
 repeater. 

With our friends at American Tower charging 
big money by the rack space unit, one must 
keep the repeater sized down to a dull roar 
and just write the hefty check each month. 

Now keep quiet, they're doing you a favor 
by letting you pay high site rent and putting
up with your repeater in their (more often 
than not) almost empty site. 

[sorry about the above, I've just gotta' poke 
some fun at back at Amer-Twr once in a while]

 Even my remote receiver sites that use 
 Hamtronics receivers (R144's) have a speaker 
 jack as I don't use the internal amp for 
 anything other than the speaker.
 Kevin Custer 

How and where do you take audio from the 
receiver? One of the micor squelch boards? 

cheers,
skipp 







 
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Re: [Repeater-Builder] TRW PT8874






Larry,
Thanks, so 10watts should drive it ok. just wanted 
to make sure before i fired some juice to it..,and to make sure it 
was not less then a 5 watt drive.

  - Original Message - 
  From: 
  Larry 
  Kemper 
  To: Repeater-Builder@yahoogroups.com 
  
  Sent: Thursday, March 24, 2005 4:34 
  PM
  Subject: Re: [Repeater-Builder] TRW 
  PT8874
  
  Brent I found another brochure that says 12 watts 
  in for 40 watts out.
  
  WA0VUSLarry KemperMuscatine, 
  Iowa
  
  [EMAIL PROTECTED]
  
  

  No virus found in this incoming message.Checked by AVG 
  Anti-Virus.Version: 7.0.308 / Virus Database: 266.7.4 - Release Date: 
  3/18/2005













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[Repeater-Builder] Re: OT Help Needed.....

2005-03-24 Thread georgiaskywarn



And thanks to this young man...the 100hz pl gave it away ;-)  Found
one of the repeaters with it's link keyed up.  Amazing that 5 watts
and 100+ miles at 3000'+ will do for you :-)  
Thanks Tony!
73,
Robert


--- In Repeater-Builder@yahoogroups.com, Tony King, W4ZT
[EMAIL PROTECTED] wrote:
 I receive the signal here in Union City mid scale on the tall antenna. 
 Verified it is transmitting a 100 Hz tone also.
 
 73, Tony W4ZT
 
 georgiaskywarn wrote:
 
 Folks,
 We need your help.  As of 5:50am (local) there is a signal (Sounds
 like a nice clean full quieting dead carrier.  This is from
 Fayetteville,GA with the remote antenna up at 125') on 449.675.  This
 just happens to be the input to the hub repeater for the Georgia
 Skywarn Linked Repeater System (www.georgiaskywarn.com).  This signal
 has been there for more than 24 hours now.  The signal is weak enough
 that the preamp can be taken offand it cannot hear the signal. 
 Unfortunately with the preamp off, most of the southern repeaters
 cannot get back into the hub.  Also several of the repeaters that link


 in cannot or do not have pl in their memory channel for the hub
 repeater.  Most of the linked repeaters can be moved into one of the
 other local uhf machines (444.600 in Fayetteville) however some are
 rock bound and cannot.
 
 I am sending this out to several groups because we have some impending
 storms this weekend.  Please check in your area for a dead key on
 449.675.
 
 Thanks,
 Robert Burton
 KD4YDC
 DEC NWS Peachtree City, GA
 
 ps Sorry for putting this on the Repeater Builders email
 group...however several people in the group (in the metro Atlanta
 area) that are not on the other list I am sending this too. txns.
 
 
 
 
 
 
 
  
 Yahoo! Groups Links
 
 
 
  
 
 
 
   
 







 
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[Repeater-Builder] 145.290- W3KKc Repeater






Kevin, 

What kind of equipment are you using for the 
145.290 repeater? 













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Re: [Repeater-Builder] M57719N RF power module

2005-03-24 Thread Mel Farrer

If you are going to use the PA module at reduced(adjustable) power I would reccomend a linear unit as opposed to a Class C unit. It is designed for a full range of drive without restrictions, (within reason). Less concerns about spurious. Just a thought.Tony Faiola [EMAIL PROTECTED] wrote:
Hello Brent:I have been working with some of these bricks from Toshiba and Mitsubishi. If you ordered the module or are ordering this module from RF Products, buy the specifications sheet ($1.50) with the module.The specification sheet has much valuable data in it including a power input verses power output curve, etc.It's usually easier to lower an input stage than the power module (drive level) using lower voltage or low power pad techniques.Looking at the aforementioned spec sheet curves, they show you what power output you can expect verses power input.You do need to be careful of the power module output spectral quality with these procedures.Hope these few tips help.Ciao, Tony K3WXBrent wrote: Anybody have any suggestions on varing the power on the M57719N Power
Module? Would it be best to limit the rf input? Would it be ok to lower the vcc on the module? which would be the best approach? BrentYahoo! Groups Links* To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/* To unsubscribe from this group, send an email to:[EMAIL PROTECTED]* Your use of Yahoo! Groups is subject to:http://docs.yahoo.com/info/terms/
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[Repeater-Builder]

2005-03-24 Thread =?iso-8859-1?B?TthBVEg=?=






I still have a Watercom VS-2 if some one wants on 
220 cheap. All I know is 
it lights up and appears to receive - seems to 
have some kind of data board
in the bottom of it that scans for  The other 
thing I am sure of is again,
it would be cheap. Unlike like others it would 
have NO Wan Tee - Did I mention
It would be cheap.

NØATH / Dave
E-mail Direct if you 
like













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Re: [Repeater-Builder] that darn speaker audio







skipp025 wrote:

  
Even my remote receiver sites that use 
Hamtronics receivers (R144's) have a speaker 
jack as I don't use the internal amp for 
anything other than the speaker.
Kevin Custer 

  
  
How and where do you take audio from the 
receiver? One of the micor squelch boards? 


No, right from the discriminator. I buffer that with an add on board
and drive the FM modulator in the TA-451.
What? You say the TA-451 doesn't have an FM modulator?
Well, try this one:
http://www.repeater-builder.com/hamtronics/ta-51pl_mod.html

BTW: I use the factory Hamtronics squelch for the Remote Receiver
sites. I don't see a need for a Micor squelch in voting additional
sites like these.

Kevin














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Re: [Repeater-Builder] 145.290- W3KKc Repeater







Brent wrote:

  
  
  
  
  Kevin, 
  What kind of equipment are you using
for the 145.290 repeater?


RE: 145.290 minus, New Baltimore PA.


  This repeater is a Motorola MICOR Railroad Mobile converted to
duplex.
  Output power 5 Watts.
  Receiver Sensitivity .15 uV. for 12 db SINAD.
  Duplexers Homemade 6 Can BpBr. (as described in older ARRL
Handbook)
  Duplex antenna @ 100', 3 dB omni side mounted. (AEA Isopole)
  MCC RC-1000V repeater controller.
  Site elevation 2360' amsl.
  Center of antenna @ 2460' amsl.
  This is a limited area coverage repeater.
















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[Repeater-Builder] Hamtronics squelch circuit hysteresis resistor



 Kevin Custer [EMAIL PROTECTED] wrote:
 BTW:  I use the factory Hamtronics squelch 
 for the Remote Receiver sites.  

Don't you ever want to punch the clown 
and change the value of the Hamtronics 
Squelch Circuit hysteresis resistor? 

skipp 







 
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Re: [Repeater-Builder] Hamtronics squelch circuit hysteresis resistor


At 3/24/2005 04:16 PM, you wrote:


  Kevin Custer [EMAIL PROTECTED] wrote:
  BTW:  I use the factory Hamtronics squelch
  for the Remote Receiver sites.

Don't you ever want to punch the clown
and change the value of the Hamtronics
Squelch Circuit hysteresis resistor?

The older Hamtronics RXs (~18 years ago?) have more serious issues.  In 
particular, the squelch noise filter has very poor transient response  
generates excessive output if rung by impulse noise.  Ignition noise or 
possibly precipitation static would cause the squelch to behave as if it 
were tightened.  Micor squelch of course fixes the problem, entirely 
bypassing the noise filter.

Bob NO6B






 
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Re: [Repeater-Builder] Re: 220 Mhz. repeater

2005-03-24 Thread Danny R. Goodrum

Skipp send me ur email address please 
Danny 
[EMAIL PROTECTED]
- Original Message - 
From: skipp025 [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, March 24, 2005 4:42 PM
Subject: [Repeater-Builder] Re: 220 Mhz. repeater

 Re: 220 Mhz. repeater

 My goodness... there's a lot of love and 
 good cheer going around the group today. 

 Onward.. 

 I don't believe the below mentioned mfgrs always 
 spec the specific application, but Midland Does 
 or did make 220 Repeater Gear. Motorola has been 
 known to spec and supply repeater gear in odd 
 bands, but since I'm not in their loop anymore I 
 can't tell you what they currently offer overseas 
 at this time. 

 On more than one occassion, I've serviced 
 some really wild repeaters on large cruise 
 ships from Europe and Asia. Other parts of the 
 world have and use ham and commercial bands we 
 don't even know about and Motorhead makes or 
 made repeaters for these ranges. 

 I've got the software for and had a source for 
 a Motorola repeater on 220 MHz range factory 
 built repeater. Serviced and sent it back 
 to Asia a few years ago. 

 Don't know if EF Johnson has resurfaced to 
 offer after the factory move.

 If anyone VERY SERIOUSLY wants a new Kenwood 
 220 Ham Repeater New, Email me off the list 
 I'm a can do kind of guy...  

 cheers,
 skipp 

  Kevin Custer [EMAIL PROTECTED] wrote:
  Does Kenwood, Motorola, Midland, and Johnson 
  build 220 MHz. Ham Repeaters? If not, it really 
  doesn't matter how damn good their (wan tee) is.
  Kevin Custer

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Re: [Repeater-Builder] 220 Mhz. repeater

2005-03-24 Thread Mike/k1eg






Dean I agree with you for public 
safety you want new. But as an Engineer and an Amateur I have to disagree 
with you for Amateur use.

Amateur Radio is about 
experimentation and building projects to the best quality you can. 
Unfortunately in this day and age few Hams build stuff anymore, so when I see 
people on this list wanting to build repeaters to a high quality level it just 
plain warms my heart. This is what Ham Radio is supposed to be 
about.

Now as to the term "junk" remember 
what is junk to one man is gold to another. Yes we start with things like 
GE Mstr. II Exec's that commercial radio shops deem not fit for public 
safety. Their reason is usually based on the cost to repair them vs. 
new. As Hams we can take these and restore them back to new condition or 
better because were not trying to make a profit. We do it because we love 
to build and experiment.

You are looking at it from a 
commercial view point not an Amateur Radio Operator view point and there is a 
big difference. So to those of you who like to build projects a hearty 
"RIGHT ON" this keeps Ham radio alive.

73,
Mike/K1EG
Another Ole Fart in the Radio 
Field.

  - Original Message - 
  From: 
  [EMAIL PROTECTED] 
  To: Repeater-Builder@yahoogroups.com 
  
  Sent: Thursday, March 24, 2005 2:48 
  PM
  Subject: Re: [Repeater-Builder] 220 Mhz. 
  repeater
  
  Hello All,
  I do not know about some of the bands that are
  posted. I do know that with Kenwood, Kenwood
  Systems and Maggiore you get a two year wan 
tee.
  With Motorola, Midland and Johnsonyou get a 1 
  year.
  We do not carry any thing else. I am not in 
  radio
  sales but I do know ifI buy a new car it is going 
  to
  get fixed for a while when it is new. I know 
  with
  the above repeaters I will get them fixed and I
  will not pay for parts or labor for some time.
  I am not a Ham and do not build repeaters from
  junk as stated earlier. I do manage four shops 
  that
  puts together a lot of repeater for public 
  safety
  and business folks. well over 200 a year at 
this
  point. I stand by my statement. Buy new. Be 
  happy.
  Very best,
  Dean Westbrook, EE,PE.
  













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[Repeater-Builder] Re: Kenwwod single band transcievers as remote (CONTROLLED) inputs

2005-03-24 Thread ki5fw



--- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote:
 
 To overcome Jack Gerritsen and his constant jamming of our 
repeater I
 have placed two Kenwood radios on the hill. I interrupted my main 
UHF
 repeaters receiver to the controller with a C.A.T. RLS-1000 3 port
 mixer and placed the Kenwood radios on the other two ports. The
 Kenwood radios (TM-241 144MHz and TM-331 220MHz) are each splitting
 their discriminator audio out of the mic connectors on the radios 
into
 both a TP-3200 Tone panel and a RCL-MOT squelch module. The audio 
from
 the RLC-MOT feeds the RLS-1000 mixer and all works very well. The
 repeater users know that when Jack starts in with his [EMAIL PROTECTED] I 
can
 send a close command to the  RLS-1000 to mute the audio coming from
 the UHF port and Jack is gone.
 
 Jack has been quit frustrated and so he scans around the bands now
 looking for our users on the inputs and finds them and starts back 
in
 on them again. Once the Kenwood radios have been compromised I 
have to
 make another trip to the hill and change the Kenwood radio
 frequencies. I want to do this remotely and I don't want to have to
 buy another Doug Hall RBI-1. 
 
 I think I can use a serial output from my controller (a Linkcomm
 RLC-3) to a basic stamp and making the controller think it is
 commanding a RBI-1. My problem is that I don't know anything about 
how
 to communicate to the Kenwood radios. Obviously Doug Hall figured 
it
 out but he does not want to share this info with me. I don't blame 
him
 as he would rather sell me another RBI-1 and I don't have the 
patents
 or the equipment to try and decrypt the stream that he is sending 
from
 the RBI-1 to the radios. The folks from C.A.T. also figured it out 
and
 tried to put it into their CAT-700 repeater controller but found a 
big
 conflict with their implementation so the had to abandon it. They
 don't want to share any detail either.
 
 Has anyone out here got the answers I am looking for? I have 
learned
 that the Kenwood radio is a typical single band radio with the mic
 plugged into it and it works accordingly but when the Kenwood RC-
10 or
 RC-20 was plugged in the mic connector it supplied a voltage to 
pin 6
 of the mic connector changing the function of the up/down pins in 
the
 mic connector to serial in/out. I need to know what baud rate I 
need
 to send the radio data. I need to know the format that the radio is
 expecting. I need to know the parameters that the radio is 
expecting. 
 

If he is that much of a pest, just contact Mr. Riley. A little note 
from him should take care of the problem.

Dennis ki5fw
 I believe that someone out here has experimented with this
 functionality it is way too cool.







 
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RE: [Repeater-Builder] 220 Mhz. repeater

2005-03-24 Thread Paul Finch






RIGHT ON! That is what I 
was trying to get across, guess I type a different language!

Paul


  -Original Message-From: Mike/k1eg 
  [mailto:[EMAIL PROTECTED]Sent: Thursday, March 24, 2005 
  6:53 PMTo: Repeater-Builder@yahoogroups.comSubject: Re: 
  [Repeater-Builder] 220 Mhz. repeater
  Dean I agree with you for public 
  safety you want new. But as an Engineer and an Amateur I have to 
  disagree with you for Amateur use.
  
  Amateur Radio is about 
  experimentation and building projects to the best quality you can. 
  Unfortunately in this day and age few Hams build stuff anymore, so when I see 
  people on this list wanting to build repeaters to a high quality level it just 
  plain warms my heart. This is what Ham Radio is supposed to be 
  about.
  
  Now as to the term "junk" remember 
  what is junk to one man is gold to another. Yes we start with things 
  like GE Mstr. II Exec's that commercial radio shops deem not fit for public 
  safety. Their reason is usually based on the cost to repair them vs. 
  new. As Hams we can take these and restore them back to new condition or 
  better because were not trying to make a profit. We do it because we 
  love to build and experiment.
  
  You are looking at it from a 
  commercial view point not an Amateur Radio Operator view point and there is a 
  big difference. So to those of you who like to build projects a hearty 
  "RIGHT ON" this keeps Ham radio alive.
  
  73,
  Mike/K1EG
  Another Ole Fart in the Radio 
  Field.
  
- Original Message - 
From: 
[EMAIL PROTECTED] 
To: Repeater-Builder@yahoogroups.com 

Sent: Thursday, March 24, 2005 2:48 
PM
Subject: Re: [Repeater-Builder] 220 
Mhz. repeater

Hello All,
I do not know about some of the bands that 
are
posted. I do know that with Kenwood, Kenwood
Systems and Maggiore you get a two year wan 
tee.
With Motorola, Midland and Johnsonyou get a 1 
year.
We do not carry any thing else. I am not in 
radio
sales but I do know ifI buy a new car it is going 
to
get fixed for a while when it is new. I know 
with
the above repeaters I will get them fixed and 
I
will not pay for parts or labor for some 
time.
I am not a Ham and do not build repeaters 
from
junk as stated earlier. I do manage four shops 
that
puts together a lot of repeater for public 
safety
and business folks. well over 200 a year at 
this
point. I stand by my statement. Buy new. Be 
happy.
Very best,
Dean Westbrook, EE,PE.














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[Repeater-Builder] Re: Kenwwod single band transcievers as remote (CONTROLLED) inputs

2005-03-24 Thread Ken Arck


At 10:52 AM 3/24/2005 -0800, you wrote:

At 3/24/2005 06:54 AM, you wrote:
Well, for things like this, I have built myself a serial snooper.  Its 
basically a serial cable that has the output split so that you can plug it 
in as usual to whatever you are hooking together and then the 3rd port 
goes to another computer running Telix or some terminal.  Then you can 
operate the device as usual and see the control commands come out in the 
terminal.  After some playing around you can figure out their scheme and 
what you need to send it to do what.  I have used this to figure out 
proprietary formats for lots of things and it works well.  Most reecently 
there was a telephone call box that used a computer with the companys own 
software to control it.  I wanted to control it with a PIC instead of a PC 
so I asked the company for their commands and formats etc. which they 
would not give.  So, I snooped and in less than a day I had thrown their 
software in the trash and my PIC was working great.  If I were you I would 
snoop on Doug Halls two serial lines going into the Kenwood radio.  I am 
sure you can figure out what you need to send that way.  Sounds like a 
great problem, if I had one of those radios I would try it myself.  Hope 
this helps.

While I'm not intimately familiar with the protocols of the older
Kenwoods, Kenwood has historically used 9600 baud for its mobile radios'
serial data. I know for a fact all the newer ones do (TM-V7, g707, V708,
TM-271A). This is the easy part.

The problem comes from Kenwood NOT having any sort of standard in the
protocol used. When we coded up the control code for these radios for our
controllers, we used a port sniffer to figure out the protocol used for the
various (and totally undocumented!) commands. 

While Bob brings up an interesting point about SPI, I really don't think
this is the case. Then again, I've been wrong before :-) However it should
be easy enough to figure out with a working RBI-1 and a 'scope.

Ken
--
President and CTO - Arcom Communications
Makers of state-of-the-art repeater controllers and accessories.
http://www.ah6le.net/arcom/index.html
We now offer complete Kenwood TKR repeater packages!
AH6LE/R - IRLP Node 3000
http://www.irlp.net




 
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[Repeater-Builder] Re: Kenwwod single band transcievers as remote (CONTROLLED) inputs

2005-03-24 Thread jumping_jackass



HA HA HA, Thats a good one.

Technology messes him up much more then the blunt force trauma of
Riley. One of Jack constant recordings on our repeater encourges us to
call the FCC western regional director at her personal number (he
braodcasts it) if we don't like his crap.

So far over the past three years that he has been on Amateur radio we
have seen:

1. Physical violence against him (he's had his ass kicked).
2. Broke windows in his house with rock wrapped in messages.
3. Kicked down his door. (With copy of FCC letter confirming his
license set-aside)
4. Power lines have been cut, many times.
5. Phone lines have been cut, many times.
6. Post embarrassing websites featuring him.(
http://www.435.org/Services/Bootleggers/jackass.html )
7. Rebroadcast his crap on all municipal and life safety services
radio frequencies within reach of his home in Bell, CA
8. Called in police for health and welfare checks daily.
9. Called in police reporting nearly every crime imaginable witnessed
at his residence.
10. Filled in his water meter with fast setting concrete (after
shutting the water off to his house first).
11. Ripped down his antennas and took them away (many times).
12. Kicked his ass at the repeater site (he went up the hill to jam
the repeater).
13. Cut his alarm system wiring (run to a motion sensor out in the
front of his driveway).
14. Reporting him to the LA county probation department.
15. Reporting him to the LA county parole department.
16. Reported him the LA county mental health department as an escaped
mental patient.
17. Report him to the FCC.
18. Report him to the local CITY OF BELL Police department.
19. Report him to the health department, the building and safety
department and the child safety services department.
20. Someone even spent weeks calling his house number every 60 seconds
to call him an asshole.
21. Someone even poured aids infected urine in his face when he
answered the door one time.

NOTHING HAS WORKED SO FAR INCLUDING THE OVER $52,000.00 in actions
brought by the FCC against him for his activities against amateur
radio in Los Angeles

He lives in a back house meaning that it would be very difficult to
lob a grenade or something into the house from the street. He spends
nearly every waking moment (16 to 18 hours daily) keyed up on several
different repeaters simultaneously harassing everyone he can. He
rarely goes out of the house (He sends his mate out to get food and
stuff). He has homesteaded his own residence and placed the rest of
his assets into a trust to protect him from levied fines garnishments
and other actions. He has won several legal battles with the local
police department for not responding quick enough to his trivial daily
complaints so they now begrudgingly jump when ever he calls.

Please stop with all of the If I were you we would just drag him out
of his house and beat the sense into him crap because it has all been
done before and does not work.
Let keep the focus here and beat him with technology. Jack Gerritsen
will soon be recognized as a pioneer and even a martyr to a long line
of future armature radio anarchist who will by able to exploit the
weaknesses in your repeater systems. Plenty of people around the
amateur radio community have watched what Jack has been able to get
away with for as long as he has and will certainly use lessons learned
when it is their turn to mess with our hobby.

--- In Repeater-Builder@yahoogroups.com, ki5fw [EMAIL PROTECTED] wrote:
 
 --- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote:
  
  To overcome Jack Gerritsen and his constant jamming of our 
 repeater I
  have placed two Kenwood radios on the hill. I interrupted my main 
 UHF
  repeaters receiver to the controller with a C.A.T. RLS-1000 3 port
  mixer and placed the Kenwood radios on the other two ports. The
  Kenwood radios (TM-241 144MHz and TM-331 220MHz) are each splitting
  their discriminator audio out of the mic connectors on the radios 
 into
  both a TP-3200 Tone panel and a RCL-MOT squelch module. The audio 
 from
  the RLC-MOT feeds the RLS-1000 mixer and all works very well. The
  repeater users know that when Jack starts in with his [EMAIL PROTECTED] I 
 can
  send a close command to the  RLS-1000 to mute the audio coming from
  the UHF port and Jack is gone.
  
  Jack has been quit frustrated and so he scans around the bands now
  looking for our users on the inputs and finds them and starts back 
 in
  on them again. Once the Kenwood radios have been compromised I 
 have to
  make another trip to the hill and change the Kenwood radio
  frequencies. I want to do this remotely and I don't want to have to
  buy another Doug Hall RBI-1. 
  
  I think I can use a serial output from my controller (a Linkcomm
  RLC-3) to a basic stamp and making the controller think it is
  commanding a RBI-1. My problem is that I don't know anything about 
 how
  to communicate to the Kenwood radios. Obviously Doug Hall figured 
 it
  out but he does not

[Repeater-Builder] Re: Kenwwod single band transcievers as remote (CONTROLLED) inputs

2005-03-24 Thread jumping_jackass




Thanks Ken, I'll be setting up my Doug Hall this evening with my scope
and looking for clues. If interested I will post my finding.

I didn't realize that your ACC serial converter worked only with the
newer DTMF enabled Kenwwod radios until after building the entire
project including screening three boards. Guess I should have read
your site better.



--- In Repeater-Builder@yahoogroups.com, Ken Arck [EMAIL PROTECTED] wrote:
 At 10:52 AM 3/24/2005 -0800, you wrote:
 
 At 3/24/2005 06:54 AM, you wrote:
 Well, for things like this, I have built myself a serial snooper.
 Its 
 basically a serial cable that has the output split so that you can
plug it 
 in as usual to whatever you are hooking together and then the 3rd
port 
 goes to another computer running Telix or some terminal.  Then you
can 
 operate the device as usual and see the control commands come out
in the 
 terminal.  After some playing around you can figure out their
scheme and 
 what you need to send it to do what.  I have used this to figure out 
 proprietary formats for lots of things and it works well.  Most
reecently 
 there was a telephone call box that used a computer with the
companys own 
 software to control it.  I wanted to control it with a PIC instead
of a PC 
 so I asked the company for their commands and formats etc. which they 
 would not give.  So, I snooped and in less than a day I had thrown
their 
 software in the trash and my PIC was working great.  If I were you
I would 
 snoop on Doug Halls two serial lines going into the Kenwood radio.
 I am 
 sure you can figure out what you need to send that way.  Sounds
like a 
 great problem, if I had one of those radios I would try it myself.
 Hope 
 this helps.
 
 While I'm not intimately familiar with the protocols of the older
 Kenwoods, Kenwood has historically used 9600 baud for its mobile radios'
 serial data. I know for a fact all the newer ones do (TM-V7, g707, V708,
 TM-271A). This is the easy part.
 
 The problem comes from Kenwood NOT having any sort of standard in the
 protocol used. When we coded up the control code for these radios
for our
 controllers, we used a port sniffer to figure out the protocol used
for the
 various (and totally undocumented!) commands. 
 
 While Bob brings up an interesting point about SPI, I really don't think
 this is the case. Then again, I've been wrong before :-) However it
should
 be easy enough to figure out with a working RBI-1 and a 'scope.
 
 Ken

--
 President and CTO - Arcom Communications
 Makers of state-of-the-art repeater controllers and accessories.
 http://www.ah6le.net/arcom/index.html
 We now offer complete Kenwood TKR repeater packages!
 AH6LE/R - IRLP Node 3000
 http://www.irlp.net







 
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[Repeater-Builder] Re: Hamtronics squelch circuit hysteresis resistor



 Bob Dengler [EMAIL PROTECTED] wrote:
 The older Hamtronics RXs (~18 years ago?) have 
 more serious issues.  In particular, the squelch 
 noise filter has very poor transient response  
 generates excessive output if rung by impulse 
 noise.  Ignition noise or possibly precipitation 
 static would cause the squelch to behave as if it 
 were tightened.  
 Bob NO6B

The original Hamtronics circuit values were not 
the best for their version of the MC3357 and/or 
MC3359 ic layout.  There were also issues of 
unwanted on board oscillation based on how the 
boards were constructed. 

The above two ic chips are/were found in many a 
scanner and two way radio circuits. I lifted 
values from other circuits and tried various 
combinations until I was happy with the result. 

The older Motorola Data Book for Communication 
IC's has data and suggestions for both the 
mentioned chips. 

cheers,
skipp 







 
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[Repeater-Builder] Re: 220 Mhz. repeater



Holiday weekend kicking in gear... I'll 
be hit and miss on the web for the next 
few days while I wrestle with 1-5/8 
hardline. 

skipp025 at yahoo.com 
remember how yahoo removes the last portion 
of your Email domain when reading the group 
on the web 
[EMAIL PROTECTED] 

 Danny R. Goodrum [EMAIL PROTECTED] wrote:
 Skipp send me ur email address please 
 Danny 
 [EMAIL PROTECTED]








 
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Re: [Repeater-Builder] 220 Mhz. repeater

2005-03-24 Thread Dexter McIntyre W4DEX


Perhaps the repeater buyers would like to start a Repeater-Buyers 
group and leave the technical challenges to real repeater builders.

Dex




 
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[Repeater-Builder] FS: Zetron Telephone Patch

2005-03-24 Thread Robin Midgett


Greetings,
I have to offer for sale a Zetron 35AR Microconnect phone patch. The unit 
is removed from service, and rack mountable. Details on the unit may be 
found at http://zetron.psicompany.com/zetron/35aspc.pdf.
I'm asking $250 or best offer, shipped CONUS.

Thank you,
Robin Midgett K4IDC
2004-2005 President, SVHFS
2005 SVHFS Conference
Charlotte, NC April 29-30
www.svhfs.org






 
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Re: [Repeater-Builder] 220 Mhz. repeater

2005-03-24 Thread Chuck Kelsey






I have to agree. The ham repeaters here outperform the fire, police and med 
systems hands down. All with cast-off "junk."

Chuck
WB2EDV



  - Original Message - 
  From: 
  Kevin Custer 
  
  To: Repeater-Builder@yahoogroups.com 
  
  Sent: Thursday, March 24, 2005 4:39 
  PM
  Subject: Re: [Repeater-Builder] 220 Mhz. 
  repeater
  [EMAIL PROTECTED] wrote:
  

I am not a Ham and do not build repeaters from junk as 
stated earlier.Please realize that this 
  list is for hams as well as commercial folks, so don't try to jam your 'always 
  buy new' theory down anyone's throat here.I can guarantee you that the ham 
  repeaters around here will blow away all of the commercial 
  installations. Hams are MUCH harder to please and demand better 
  performance. My 2 meter system and my 440 system covers all of my 
  County, something that cannot be said for the multi-thousand dollar County 
  radio installation.
  
I do know that with Kenwood, Kenwood Systems and Maggiore 
you get a two year wan tee.Also, the topic here 
  is 220 MHz repeaters. Does Kenwood, Motorola, Midland, and Johnson build 
  220 MHz. ham repeaters?If not, it really doesn't matter how damn good 
  their (wan tee) is.Kevin Custer













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Re: [Repeater-Builder] Hamtronics squelch circuit hysteresis resistor








skipp025 wrote:

  
Kevin Custer [EMAIL PROTECTED] wrote:
BTW:  I use the factory Hamtronics squelch 
for the Remote Receiver sites.  

  
  
Don't you ever want to "punch the clown" 
and change the value of the Hamtronics 
Squelch Circuit hysteresis resistor?


I didn't say I didn't change the resistor, I only said I use the
Hamtronics squelch as opposed to the Micor Squelch:
http://www.repeater-builder.com/hamtronics/rserieshysteresis.html

Kevin














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[Repeater-Builder] Info on constructing a philips 828 repeater required

2005-03-24 Thread Dean




G'day people,

I am new to the group (sounds dangerous) I was hoping somebody could 
provides some info on how to set up a philips 828 into a repeater. 

I am a active member of an organisation that provides communications 
support for motorsport events ranging from the local car club rally 
to the Internationally sanctioned events like Telstra Rally 
Australia, which incidently lost its support from the WA government 
recently - but thats another matter.   

In my situation its not ham (nothing against ham operators either) 
but a mid range VHF around the 60 -90 mHz range, the designated 
commercial VHF in Australia.

I have alrdeay looked at one unit that has already been converted 
and it raised my eyebrows, I noticed that the Tx  RX oscillator 
circuit and crystals were missing totally and have been replaced by 
what looks like fairly modern synthised circuitry. Is this possible ?

Other useful knowledge to this project is it will be running 
diplexers 

Repeater must be mobile ie capable of being moved by one person to 
another location as required.

Hope you have a safe easter and drive safe !

I will be having a shoulder op on tuesday 29th so probably won't be 
able to respond for at least a week post op. 

Thanks in advance 

Cheers

Dino


 
  










 
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Re: [Repeater-Builder] MSF5000 Amp interface

2005-03-24 Thread Larry Taylor



The MSF5000 has a 50 Ohm input. It needs up to 27 Watts of power to drive 
the PA. If you can meet those spec's it should work just fine.
PS And the right freq. that the PA are set up for.
Larry Taylor KF6JBG
Home: [EMAIL PROTECTED]

- Original Message - 
From: Ken [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, March 24, 2005 6:00 AM
Subject: [Repeater-Builder] MSF5000 Amp interface




 Hi, I would like to know how to interface an RF amplifier to the
 MSF5000 other than the original amp from Motorola.  I would like to
 install a TPL or Micor amp to the MSF5000 if possible.

 Thanx

 Ken
 http://www.hamrepeater.net








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Re: [Repeater-Builder] Desense im guessing?

2005-03-24 Thread Cody Hayden


db pads are bandaids and not cures..get a better
duplexer..problem solved..
--- Brent [EMAIL PROTECTED] wrote:
 
 One of my 2m repeater has a problem.
 It is a GE Mastr II base/repeater. have a set of
 wacom  WP-639  on the
 machine,
 and a ARR preamp. ..a user 2 air miles fromt he site
 is wiped out of the
 receiver while the Tx is On, I turn the PA down
 below 20watts and he ( or
 all users) are clear. I have tried two different
 antennas before thinking
 about the duplexers, and want to double check other
 options before the
 cans.. these were factory tuned..cans.
 
 any thought or suggestions
 Thanks
 Brent
 
 
 
 
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 Date: 3/18/2005
 
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Re: [Repeater-Builder] Info on constructing a philips 828 repeater required

2005-03-24 Thread Kevin Natalia


Hi Dean,

Go to our web page www.qsl.net/zl1hk and follow the menu to information on 
converting the 828 to a repeater.
If there are any questions you have about the conversion, drop me a line 
direct. sparc(at)internet(dot)co(dot)nz.

Regards
Kevin, Zl1KFM

- Original Message - 
From: Dean [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Friday, March 25, 2005 2:38 PM
Subject: [Repeater-Builder] Info on constructing a philips 828 repeater 
required





 G'day people,

 I am new to the group (sounds dangerous) I was hoping somebody could
 provides some info on how to set up a philips 828 into a repeater.

 I am a active member of an organisation that provides communications
 support for motorsport events ranging from the local car club rally
 to the Internationally sanctioned events like Telstra Rally
 Australia, which incidently lost its support from the WA government
 recently - but thats another matter.

 In my situation its not ham (nothing against ham operators either)
 but a mid range VHF around the 60 -90 mHz range, the designated
 commercial VHF in Australia.

 I have alrdeay looked at one unit that has already been converted
 and it raised my eyebrows, I noticed that the Tx  RX oscillator
 circuit and crystals were missing totally and have been replaced by
 what looks like fairly modern synthised circuitry. Is this possible ?

 Other useful knowledge to this project is it will be running
 diplexers

 Repeater must be mobile ie capable of being moved by one person to
 another location as required.

 Hope you have a safe easter and drive safe !

 I will be having a shoulder op on tuesday 29th so probably won't be
 able to respond for at least a week post op.

 Thanks in advance

 Cheers

 Dino















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Re: [Repeater-Builder] Info on constructing a philips 828 repeater required

2005-03-24 Thread Kevin Natalia


Dean,

There is also a FM828 forum that you might like to join. It is helpful to 
828 operators.

Kevin, ZL1KFM

- Original Message - 
From: Dean [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Friday, March 25, 2005 2:38 PM
Subject: [Repeater-Builder] Info on constructing a philips 828 repeater 
required





 G'day people,

 I am new to the group (sounds dangerous) I was hoping somebody could
 provides some info on how to set up a philips 828 into a repeater.

 I am a active member of an organisation that provides communications
 support for motorsport events ranging from the local car club rally
 to the Internationally sanctioned events like Telstra Rally
 Australia, which incidently lost its support from the WA government
 recently - but thats another matter.

 In my situation its not ham (nothing against ham operators either)
 but a mid range VHF around the 60 -90 mHz range, the designated
 commercial VHF in Australia.

 I have alrdeay looked at one unit that has already been converted
 and it raised my eyebrows, I noticed that the Tx  RX oscillator
 circuit and crystals were missing totally and have been replaced by
 what looks like fairly modern synthised circuitry. Is this possible ?

 Other useful knowledge to this project is it will be running
 diplexers

 Repeater must be mobile ie capable of being moved by one person to
 another location as required.

 Hope you have a safe easter and drive safe !

 I will be having a shoulder op on tuesday 29th so probably won't be
 able to respond for at least a week post op.

 Thanks in advance

 Cheers

 Dino















 Yahoo! Groups Links








 





 
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Re: [Repeater-Builder] Desense im guessing?

2005-03-24 Thread Tony King, W4ZT


Cody Hayden wrote:

db pads are bandaids and not cures..get a better
duplexer..problem solved..
  

It is common practice to use 6 to 10 db of attenuation between a new 
high gain (typically as much as +18 db) GaAsFET low noise amplifier and 
an older receiver.  The gain of the preamp is about 10 db higher than 
you need for the receiver yet you can gain benefits from the low noise 
front end and high intermod resistance. Placing the attenuator between 
the preamp and the receiver doesn't hurt the noise figure yet keeps the 
receiver front end input signal within acceptable limits. It doesn't 
reduce the usable sensitivity of the receiver either.  The attenuator 
doesn't make up for deficiencies in a duplexer but it certainly can slam 
the door on other problems many of us have faced with excessive gain 
ahead of our older less sensitive receiver. The result is a much lower 
noise front end with moderately higher gain. Bottom line: better signal 
to noise ratio.

--- Brent [EMAIL PROTECTED] wrote:
  

One of my 2m repeater has a problem.snip

73, Tony W4ZT






 
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Re: [Repeater-Builder] Desense im guessing/Preamp-n-Pads