[Repeater-Builder] Re: OT - Tower Photographs needed

[Don]

You Might check Here for some Pics 

http://tinyurl.com/om6t7x

http://tinyurl.com/r2xcsj

And here is the Video with Pictures of the Tower in Il the Helo Hit 

http://tinyurl.com/orazsd


Hope that helps 

Don KA9QJG 

Re: [Repeater-Builder] OT - Tower Photographs needed

[Kris Kirby]

On Thu, 21 May 2009, rahwayflynn wrote:
> Anyone with a 500+ guyed tower?  I am working on a power point 
> presentation for the local OEM.  The subject matter is selecting an 
> appropriate LZ for medivac helicopters, IE keep the aircraft away from 
> towers and power lines.
> 
> What I am looking for is a night & day shot from exactly the same 
> perspective (let the ground crew see the guys in the daylight & watch 
> them disappear at night)

See if you can get a helicopter pilot to speak on your behalf. Nothing 
scare the bejesus out of them like flying anywhere *close* to a 500+ ft 
tower.

--
Kris Kirby, KE4AHR
Disinformation Analyst

Re: [Repeater-Builder] OT - Tower Photographs needed

[George Henry]

If you don't get any other offers, I'm only about 10 or 12 miles from the 
975-footer in Aurora, Illinois that took down an Air Angels chopper during a 
night flight last year, killing the crew and the 13-month old infant they 
were transporting.  I could probably buzz out there over the weekend and get 
you some shots. (Could have been a lot worse:  the tower is right behind a 
large townhome development, and the chopper crashed in a field just across 
the road from them...)

Can't think of a better example for you...


George, KA3HSW / WQGJ413

- Original Message - 
From: "rahwayflynn" 
To: 
Sent: Wednesday, May 20, 2009 8:03 PM
Subject: [Repeater-Builder] OT - Tower Photographs needed


Anyone with a 500+ guyed tower?I am working on a power point 
presentation for the local OEM.  The subject matter is selecting an 
appropriate LZ for medivac helicopters, IE keep the aircraft away from 
towers and power lines.

What I am looking for is a night & day shot from exactly the same 
perspective (let the ground crew see the guys in the daylight & watch them 
disappear at night)

Re: [Repeater-Builder] Re: Homebrew low power Repeater

[wd8chl]

skipp025 wrote:

> Some people use voice detection to make/provide a COS/COR 
> logic, some folks "tack on" a CTCSS (PL) Decoder and some 
> actually open the radio to find a usable "tap point" in 
> the receiver circuit. Depending on how tricky (and how much 
> money) you want to invest in the package... voice operation 
> can work, or it can be quirky, jerky and a real pain to 
> deal with. An Icom 2AT "probably blows" enough CTCSS tone 
> through the regular speaker audio output where you could 
> easily tack a decent CTCSS Decoder on for decent full CTCSS 
> Operation. 
> 
> No kits yet... but I'm thinking about it... 
> 
> cheers, 
> skipp 
> 
> www.radiowrench.com/sonic 


I have a 2A made into a 'remote base' radio, ie, mounted in a metal box 
and screwed to a rack chassis, with a terminal strip for 
gozinta/gozouta. If I remember, I tapped the high side of the volume pot 
for a TS-32. Encode went in following the instructions for the version 
of the SS-32 that was made for portables and small radios of the late 
70-s/early 80's...it's out there somewhere...and I did find COS 
somewhere too...probably with help from the old ACC notes.
Now I have a 4A from my dad's estate I may see if I can do the same 
thing with...

Re: [Repeater-Builder] Re: Homebrew low power Repeater

[wd8chl]

skipp025 wrote:
> Hi Fred, 
> 
> It would probably be more accurate to call it a cross band 
> port hole or window unless both bands are full repeaters with 
> audio and COS/COR working together. 

worm hole?

Re: [Repeater-Builder] Re: Homebrew low power Repeater

[Brian]

Hey

If you want a simple kit the partical Basic controller kit is very 
reasonable.
www.ics-ctrl.com

73
Brian
ka9pmm

skipp025 wrote:
>
>
> Hi Fred,
>
> It would probably be more accurate to call it a cross band
> port hole or window unless both bands are full repeaters with
> audio and COS/COR working together.
>
> It's been done many times with both mobiles and portables
> with an example like the Motorola Radius/Maxtrac Radios wired
> "back to back".
>
> One of the group members here wired two HT (portables) into
> a repeater, which could just as easily be converted to a
> cross-band port hole (window). I've seen that project twice
> at the Dayton Hamvention and it looks pretty nice.
>
> I've wired the Icom 2at and 02at (and higher band) portables
> into both cross-band and full repeater operation. The hardest
> task is dealing with (finding) valid receive signal logic
> from the receiver... used to provide the PTT (transmit)
> direct or through some type of controller circuit.
>
> Some people use voice detection to make/provide a COS/COR
> logic, some folks "tack on" a CTCSS (PL) Decoder and some
> actually open the radio to find a usable "tap point" in
> the receiver circuit. Depending on how tricky (and how much
> money) you want to invest in the package... voice operation
> can work, or it can be quirky, jerky and a real pain to
> deal with. An Icom 2AT "probably blows" enough CTCSS tone
> through the regular speaker audio output where you could
> easily tack a decent CTCSS Decoder on for decent full CTCSS
> Operation.
>
> No kits yet... but I'm thinking about it...
>
> cheers,
> skipp
>
> www.radiowrench.com/sonic
>
> > "Fred"  wrote:
> > Hello:
> > I would like to build a low power 5 watt cross-band
> > repeater for 2m/440 use. I recall seeing this set up
> > using 2 HT's, also 2 mobile rigs. Has anyone built
> > something to suit my needs, or are there kits available?
> > Thank you
> > 73 de Fred W1POP
>
> 
> 
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com 
> Version: 8.5.339 / Virus Database: 270.12.36/2127 - Release Date: 05/21/09 
> 17:51:00
>
>   

RE: [Repeater-Builder] Re: Help with power supply

[Eric Lemmon]

Charles,

You can't "convert" a 28 VDC Astron power supply to a lower voltage, unless
you replace the power transformer and regulator board, and possibly the pass
transistors.  Since the Astron linear power supplies use a series-pass
regulator design, the pass transistors could burn up if expected to regulate
at full design current but at half the rated voltage.  That said, you CAN
install a 14 VDC regulator board (or modify the 28 VDC regulator board with
components suitable for 14 VDC) and run the power supply at less than half
its rated load.  I would never do this, because the value of a good,
high-capacity 28 VDC power supply is always much greater than one that has
been hacked to operate at a lower value.

Before you decide what to do, call Fred (the Tech Support guru at Astron)
and ask his advice.  Go to the Astron web site for the phone number.

73, Eric Lemmon WB6FLY

--- In Repeater-Builder@yahoogroups.com
 , "Charles Lowery" 
wrote:
>
> I purchased a Uniden 28 volt power supply today on ebay. It lookes like
the Astron LSRM-25A or 35A both front and back (I assume Astron made it).
Without seeing it, I assume it works OK (cost $2.00 + shipping). Has anyone
converted one of these to 12 volts?  I have no schematics for it and can not
find one on the net. If converted what would be the available current?
> 
> Charles, NM4V

[Repeater-Builder] Re: maxon enduro prog

[skipp025]

Sorry I missed you Ted, would have been nice to meet me... 
%&^*$ ... I mean meet you. :-) 

Telepath in California is a Maxon Dealer and I've ordered 
programming cables from them in the past. You might contact 
them if nothing else pans out. 

www.telepathcorp.com/ 

Nail them down on the exact shipping and final cost before 
you complete the deal. They've tried to "unknowingly" tack 
some extra fees on to my and a friends previous purchases. 
They can get the Maxon goods... you just want to make sure 
it's at the real price... 


cheers, 
skipp 

> Ted Bleiman K9MDM - MDM Radio  wrote:
>
> gentlemen:
> I hope all are recovered from the Dayton experience and dried out by this 
> time. my feet are still damp but, its a price i pay for schmoozing with all 
> the folks I saw at Dayton.
> To the business at hand:
> I searched all over but no one knew about this particular radio.
> I have 2 vhf Maxon enduro for which I need programming stuph. cable and disk. 
> anyone got it. and if so can i borrow it . i got one customer what has these 
> things and thye needs reprogramming. Or if'n you got it I'll ship you the 
> radios and you program them. either way.
> contact info below
> see you all next year 
> 

[Repeater-Builder] Re: Homebrew low power Repeater

[skipp025]

Hi Fred, 

It would probably be more accurate to call it a cross band 
port hole or window unless both bands are full repeaters with 
audio and COS/COR working together. 

It's been done many times with both mobiles and portables 
with an example like the Motorola Radius/Maxtrac Radios wired 
"back to back". 

One of the group members here wired two HT (portables) into 
a repeater, which could just as easily be converted to a 
cross-band port hole (window). I've seen that project twice 
at the Dayton Hamvention and it looks pretty nice. 

I've wired the Icom 2at and 02at (and higher band) portables 
into both cross-band and full repeater operation. The hardest 
task is dealing with (finding) valid receive signal logic 
from the receiver... used to provide the PTT (transmit) 
direct or through some type of controller circuit. 

Some people use voice detection to make/provide a COS/COR 
logic, some folks "tack on" a CTCSS (PL) Decoder and some 
actually open the radio to find a usable "tap point" in 
the receiver circuit. Depending on how tricky (and how much 
money) you want to invest in the package... voice operation 
can work, or it can be quirky, jerky and a real pain to 
deal with. An Icom 2AT "probably blows" enough CTCSS tone 
through the regular speaker audio output where you could 
easily tack a decent CTCSS Decoder on for decent full CTCSS 
Operation. 

No kits yet... but I'm thinking about it... 

cheers, 
skipp 

www.radiowrench.com/sonic 



> "Fred"  wrote:
> Hello:
> I would like to build a low power 5 watt cross-band 
> repeater for 2m/440 use. I recall seeing this set up 
> using 2 HT's, also 2 mobile rigs. Has anyone built 
> something to suit my needs, or are there kits available?
> Thank you
> 73 de Fred W1POP 

[Repeater-Builder] Re: Homebrew low power Repeater

[william]

Hello:Dave
ypur proyet is a verry good idea, I will like to have more information on the 
way it put together, i like to know it be posible to make i wiht tow hi power 
mobiles radios it be great.
thanks for the atencion to this meassge.
William N1LIU73'S


--- In Repeater-Builder@yahoogroups.com, Dave E Stephens Sr  wrote:
>
> i built a low power (in band) repeater using 2 IC-2at's and a NHRC-2 
> controler. that thing worked great for a 3 watt repeater. now you can do the 
> same using a 2, 3, or 4 a, or at walkie. its rather simple. to be honest, if 
> you have the knowledge to pass the tech ham test, you can build this. start 
> off with the NHRC-2 controller. read how the thing works and then get the 2 
> walkies. trust me. its easy
>  
> Rev. Dave Stephens Sr
> KF6WJA 
> Grants Pass Or
> 
> --- On Mon, 5/18/09, Fred  wrote:
> 
> From: Fred 
> Subject: [Repeater-Builder] Homebrew low power Repeater
> To: Repeater-Builder@yahoogroups.com
> Date: Monday, May 18, 2009, 10:13 PM
> 
> 
> 
> 
> 
> 
> 
> 
> Hello:
> I would like to build a low power 5 watt crossband repeater for 2m/440 use. I 
> recall seeing this set up using 2 HT's, also 2 mobile rigs.
> Has anyone built something to suit my needs, or are there kits available ?
> Thank you
> 73 de Fred W1POP
>

RE: [Repeater-Builder] maxon enduro prog

[ka9qjg]

Ted  , Have You checked with http://www.brinkleyelectronics.com/

 

I think You have know them for Years , If they Don't I am sure they will
know someone 

 

Good Luck 

 

Don KA9QJG 

 

Re: [Repeater-Builder] Re: MSR 2000 simplex base station conversion to repeater

[WD7F - John in Tucson]

Thanks Skipp...I was thinking there was more info on changing the base 
station to a repeater and as Oliver said "Sir, I want more !".
de WD7F
John in Tucson

- Original Message - 
From: "skipp025" 
To: 
Sent: Thursday, May 21, 2009 11:16 AM
Subject: [Repeater-Builder] Re: MSR 2000 simplex base station conversion to 
repeater


> Hi John,
>
> Got to lay off the brandy so early in the morning... :-)
>
> 3rd one down from the blue bar:
>
> sqlgate.zip - Revised MSR2000 to external controller conversion.
>
> http://www.radiowrench.com/sonic/so02004.html
>
> cheers,
> s.
>
>> "WD7F - John in Tucson"  wrote:
>>
>> Skipp, where on the /sonic page is the MSR2000 info?  I know I had a 
>> couple
>> extra glasses of wine at my grand-daughter's graduation party last night,
>> however..duh !
>> de WD7F
>> John in Tucson
>>
>> - Original Message - 
>> From: "skipp025" 
>> To: 
>> Sent: Thursday, May 21, 2009 8:02 AM
>> Subject: [Repeater-Builder] Re: MSR 2000 simplex base station conversion 
>> to
>> repeater
>>
>>
>> >> "mike"  wrote:
>> >> To complete an MSR2000  and provided you have the correct
>> >> modules for a repeater, you will also need to put in the correct
>> >> Jumpers. Maybe someone who has done this could provide just
>> >> the jumpers that are needed to be installed to make the unit a
>> >> repeater. Then one could check to make sure the unit is working
>> >> correctly and then modify it according to the needs of the user.
>> >> From that point one could tie in the controller of their chose ect.
>> >> Mike
>> >
>> > And that information can be found at www.radiowrench.com/sonic
>> >
>> > cheers,
>> > s.
>> >
>> >
>> >
>> > 
>> >
>> >
>> >
>> > Yahoo! Groups Links
>> >
>> >
>> >
>>
>>
>> 
>>
>>
>>
>> No virus found in this incoming message.
>> Checked by AVG - www.avg.com
>> Version: 8.5.339 / Virus Database: 270.12.35/2123 - Release Date: 
>> 05/19/09
>> 17:59:00
>>
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>






No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.339 / Virus Database: 270.12.36/2126 - Release Date: 05/21/09 
06:22:00

[Repeater-Builder] Re: Help with power supply

[Ed Bathgate]

Charles

Checkout the Astron page on the repeater builder website. There is a lot
of info on general linear supplies using the LM723 regulator chip.
You should be able to change the zener reference diode, and tune it down
to 13.8v and deliver the same current.

***Danger, notice here ***
You will NOT have the 13.8v overvoltage - crobar protection without
changing that circuit also.  You will have whatever it had at 28v.
In my experience,  regulator transistors seldom fail open,  they often
short, delivering the full transformer output into the crowbar circuit,
Which if it fails to crowbar,  frys your precious ham rigs.   This
supply will probably have 35 volts or more at the caps, even under load.
If you dump 35v into your 13.8 rig, it will not survive!!!  It might
burst into flames!!


If only the output voltage is lowered, the regulator transistors are
going to dropping more voltage, and will get MUCH HOTTER!!!  You will be
dissipating 3 times more heat then it would have at 28v.  Fans!! Several
of them!

My theory, ( without seeing this supply )  
120v input to transformer, transformer output 35v, bridge, Caps, 35VDC,
regulated down to 28v.  The transistors are dropping 7v. 
7v @ 15a = 105 watts of heat. 
If you just tune the voltage reg down to 13.8, you will still have that
35vdc from the rectifier.  The transistors are now dropping 21.2v
21.2 @15a = 318 watts of heat.  
That might be too much dissipation per transistor, and cause them to
fail fast.

You might gain an advantage by changing the 125 volt input to the 220v
option.  This will lower the voltage on the transformer secondary.
You should still get around 17.5v or more at the
secondary/rectifier-caps,  which will reduce the heat generated in the
regulator transistors.
I use a junker automotive foglamp (free from junked truck) for load
testing of unknown powersupplies.  It pulls about 5 amps,  and is
tolerant of over voltage conditions and even runs on 12v AC. 

73
Ed N3SDO

Re: [Repeater-Builder] Desense on High Power Linear Repeater?

[wd8chl]

Jeff DePolo wrote:
>> This leads me to a question that I have had on my mind. How 
>> are people 
>> doing desense testing with D-Star systems? (Remember, it's digital.)
>>
>> 73, Joe, K1ike
> 
> How about this - record a clean D-Star transmission (not decoded, just the
> "raw" output from an FM receiver) on a PC with a good sound card, then use
> it to modulate the sig gen in your service monitor.  Do desense test using a
> lossy tee like you normally would, except instead of comparing 12 dB SINAD
> points, you'd have to rely on listening to the repeated/decoded audio on
> another radio to gauge performance.  
> 

D-Star, likeP25, is true FSK, so one would need a sound card with direct 
DC coupling end-to-end.
I've seen some that decode POCSAG and FLEX ok, so that would probably work.

Re: [Repeater-Builder] Re: Desense on High Power Linear Repeater?

[wd8chl]

atms169 wrote:


> I don't have any test equipment that would work for the digital dstar
> so it's more of a trial and error thing.

There ought to be an analog mode...if there isn't, Icom made a HUGE fubar!

[Repeater-Builder] Re: MSR 2000 simplex base station conversion to repeater

[skipp025]

Hi John, 

Got to lay off the brandy so early in the morning... :-) 

3rd one down from the blue bar: 

sqlgate.zip - Revised MSR2000 to external controller conversion. 

http://www.radiowrench.com/sonic/so02004.html 

cheers, 
s. 

> "WD7F - John in Tucson"  wrote:
>
> Skipp, where on the /sonic page is the MSR2000 info?  I know I had a couple 
> extra glasses of wine at my grand-daughter's graduation party last night, 
> however..duh !
> de WD7F
> John in Tucson
> 
> - Original Message - 
> From: "skipp025" 
> To: 
> Sent: Thursday, May 21, 2009 8:02 AM
> Subject: [Repeater-Builder] Re: MSR 2000 simplex base station conversion to 
> repeater
> 
> 
> >> "mike"  wrote:
> >> To complete an MSR2000  and provided you have the correct
> >> modules for a repeater, you will also need to put in the correct
> >> Jumpers. Maybe someone who has done this could provide just
> >> the jumpers that are needed to be installed to make the unit a
> >> repeater. Then one could check to make sure the unit is working
> >> correctly and then modify it according to the needs of the user.
> >> From that point one could tie in the controller of their chose ect.
> >> Mike
> >
> > And that information can be found at www.radiowrench.com/sonic
> >
> > cheers,
> > s.
> >
> >
> >
> > 
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> 
> 
> 
> 
> 
> 
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 8.5.339 / Virus Database: 270.12.35/2123 - Release Date: 05/19/09 
> 17:59:00
>

Re: [Repeater-Builder] Re: MSR 2000 simplex base station conversion to repeater

[WD7F - John in Tucson]

Skipp, where on the /sonic page is the MSR2000 info?  I know I had a couple 
extra glasses of wine at my grand-daughter's graduation party last night, 
however..duh !
de WD7F
John in Tucson

- Original Message - 
From: "skipp025" 
To: 
Sent: Thursday, May 21, 2009 8:02 AM
Subject: [Repeater-Builder] Re: MSR 2000 simplex base station conversion to 
repeater


>> "mike"  wrote:
>> To complete an MSR2000  and provided you have the correct
>> modules for a repeater, you will also need to put in the correct
>> Jumpers. Maybe someone who has done this could provide just
>> the jumpers that are needed to be installed to make the unit a
>> repeater. Then one could check to make sure the unit is working
>> correctly and then modify it according to the needs of the user.
>> From that point one could tie in the controller of their chose ect.
>> Mike
>
> And that information can be found at www.radiowrench.com/sonic
>
> cheers,
> s.
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>






No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.339 / Virus Database: 270.12.35/2123 - Release Date: 05/19/09 
17:59:00

[Repeater-Builder] Re: MSR 2000 simplex base station conversion to repeater

[skipp025]

> "mike"  wrote:
> To complete an MSR2000  and provided you have the correct 
> modules for a repeater, you will also need to put in the correct 
> Jumpers. Maybe someone who has done this could provide just 
> the jumpers that are needed to be installed to make the unit a 
> repeater. Then one could check to make sure the unit is working 
> correctly and then modify it according to the needs of the user. 
> From that point one could tie in the controller of their chose ect.
> Mike

And that information can be found at www.radiowrench.com/sonic 

cheers, 
s. 

[Repeater-Builder] maxon enduro prog

[Ted Bleiman K9MDM - MDM Radio]

gentlemen:
I hope all are recovered from the Dayton experience and dried out by this time. 
my feet are still damp but, its a price i pay for schmoozing with all the folks 
I saw at Dayton.
To the business at hand:
I searched all over but no one knew about this particular radio.
I have 2 vhf Maxon enduro for which I need programming stuph. cable and disk. 
anyone got it. and if so can i borrow it . i got one customer what has these 
things and thye needs reprogramming. Or if'n you got it I'll ship you the 
radios and you program them. either way.
contact info below
see you all next year 











Ted Bleiman K9MDM
MDM  Radio    " If its in stock...we've got it!"
P O Box 31353
Chicago, IL 60631-0353 
773.631.5130  fax 773.775.8096  
 
web http://www.mdmradio.com 
 email -  mdmra...@yahoo.com <<< DIRECT ALL EMAIL 



  

RE: [Repeater-Builder] Re: Desense on High Power Linear Repeater?

[Thomas Oliver]

At this point if you need to use the amplifier your best bet is to just
reduce the output until the desense goes away and call it good.

tom


> [Original Message]
> From: atms169 
> To: 
> Date: 5/20/2009 10:52:37 PM
> Subject: [Repeater-Builder] Re: Desense on High Power Linear Repeater?
>
> Hey Don, yeah good to hear ya!
>
> Well, the system is at my house.  If I could find a tower (Trust me I
have looked around) then that would make the world of difference.
>
> Its up on my tower about 60 feet (Both UHF and VHF).  The VHF has pretty
good coverage.  The UHF not so much, probably half of the VHF side.
>
> Using LMR400 for both with a 7 dB vertical for the UHF and a 4.5 dB for
the VHF.
>
>
>
>
> --- In Repeater-Builder@yahoogroups.com, "de W5DK"  wrote:
> >
> > Aaron, 
> > Howdy again neighbor! Don't start spreading rumors that its flat in
Texas,
> > it's all downhill to the beach.on second thought it IS flat and the
> > water is bad
> > 
> > Are these the cavities I tuned for you last fall? If so guys these
are
> > typical specs for 4 cans BPBR. Sorry but I couldn't find screen shots of
> > when I tuned them, they were just under 80DB as I recall, and had been
> > fiddled with before I corrected them.
> > 
> > We had a brief discussion that day Aaron, and you are going to hear
support
> > of my suggestions. Location Location Location. Whether its Dstar or
not, you
> > can only squeeze so much range out of a site. You are adding items on
the RX
> > and TX and have exceeded the separation specs of your duplexers. You
may be
> > in the same boat many people are, all the equipment and no place to go.
You
> > need to acquire a better site. 
> > 
> > Are you running the UHF package still? And these are at the same site
right?
> > Tell us the details of the antenna systems-height, feed line (type and
> > length) and antennas? I'm curious of the range differences between the
UHF
> > and VHF after considering the differences in antenna systems.
> > 
> > 
> >  
> > 73
> > Don Kirchner W5DK
> >
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

RE: [Repeater-Builder] Desense on High Power Linear Repeater?

[Jeff DePolo]

> This leads me to a question that I have had on my mind. How 
> are people 
> doing desense testing with D-Star systems? (Remember, it's digital.)
> 
> 73, Joe, K1ike

How about this - record a clean D-Star transmission (not decoded, just the
"raw" output from an FM receiver) on a PC with a good sound card, then use
it to modulate the sig gen in your service monitor.  Do desense test using a
lossy tee like you normally would, except instead of comparing 12 dB SINAD
points, you'd have to rely on listening to the repeated/decoded audio on
another radio to gauge performance.  

To establish the baseline receiver sensitivity reference, disconnect the
D-Star transmitter from the antenna system and run it into a dummy load.
While listening to the repeater output on another radio, adjust sig gen
output until you get clean decode sans R2D2, record the sig gen output level
as the baseline.  Then reconnect the transmitter to the antenna system, and
repeat.  If you need to increase the sig gen to get clean decode again, you
have desense obviously.

This isn't an ideal way to test, but it's better than nothing lacking real
D-Star test equipment.

Is there any way to get pre-FEC and post-FEC BER metrics out of a D-Star
repeater or user radio?

--- Jeff WN3A

Re: [Repeater-Builder] Re: Desense on High Power Linear Repeater?

[Milt]

This brings up the question of how one actually does testing of a D-Star 
system.  So far it seems that trail and error is the only way things 
actually get  measured.  Having read that the D-Star boxes Icom sells are 
little more than mobiles in a box I am wondering if it is possible to set 
the internals to an analog state to do desense testing?

Milt
N3LTQ


- Original Message - 
From: "atms169" 
To: 
Sent: Wednesday, May 20, 2009 11:28 PM
Subject: [Repeater-Builder] Re: Desense on High Power Linear Repeater?


>I have opened both repeaters.  The VHF already had the blue hardline in it, 
>the UHF however I replaced with superflex.
>
> I may try something different.  Hardline up the tower and for a patch cord 
> (about 10 feet) up the mast I'll use superflex.  I'll have to play around 
> and see what I have still.
>
> The preamp has made a big impression on the RX without the amp.  I have 
> not tried the system without it and the amp at the same time.  Might be 
> worth a shot.
>
> I don't have any test equipment that would work for the digital dstar so 
> it's more of a trial and error thing.
>
>
> --- In Repeater-Builder@yahoogroups.com, "wa1nh"  wrote:
>>
>> I am going to ask a question that might sound stupid but, based upon 
>> Icom's ignorance, I need to ask.
>> Did you ever open the repeater case on the 2m repeater and replace the 
>> rg-58 patch cables that are zip tied to each other to connect the rf 
>> modules to the rear of the case before adding your preamp?  Our local 
>> repeater guys had serious desense and ended up replacing the junk cables 
>> with rg393.And you may find that the receiver sensitivity is 
>> closer to 0.6 uV.
>> IF you insist on using the preamp, I would suggest using a decade box to 
>> attenuate after the preamp.changing the attenuation periodically to 
>> get it to a better level. +18dB is a little too much for any receiver.
>>
>> Jason, WA1NH
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>

[Repeater-Builder] Re: MSR 2000 simplex base station conversion to repeater

[mike]

To complete an MSR2000  and provided you have the correct modules for a 
repeater, you will also need to put in the correct Jumpers. Maybe someone who 
has done this could provide just the jumpers that are needed to be installed to 
make the unit a repeater. Then one could check to make sure the unit is working 
correctly and then modify it acording to the needs of the user. From that point 
one could tie in the controller of their chose ect.
Mike