[Repeater-Builder] Motorola t1500 parts

[kerincom]

Hi guys .Does anyone know where I can get spare parts for a Motorola t1500
uhf cavity tin .
The ones I have are setup as bandpass and I am looking for the notch loops 


 
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 
www.kerinvalecomaudio.com.au
 

RE: [Repeater-Builder] Unknown uvhf antenna

[kerincom]

I have had a further look at it today and might have found the reason for
the high swr .The coil didn't seem to be earthing in the braid .When moving
the coax the swr was all over the place .I re crimped the coil under the
coax braid and the swr is now below 1.5:1 on the marine channels . 
 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Stanley Stanukinos
Date: 8/24/2010 9:48:09 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Unknown uvhf antenna
 
  
Have you tried to resonate it at 27 MHz?
 
From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups
com] On Behalf Of Ian Wells
Sent: Monday, August 23, 2010 10:50 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Unknowen uvhf antenna
 
  

 
Hi guys .I have a client that has a marine antenna that is suppose to be a
VHF 156mhz antenna but it is showing up as mega high swr 
>From the base to the coil above is 115mm .the center wire finishes just
above the spiral wrap (picture on the left )and is 90mm long and the spring
is connected to the braid under the brass crimp and extends in the picture
in the right 950mm long.Can anyone identify the type so we may check the
lengths to see why the swr is over 3.1 when the manufacturers specs should
be 1.2
Thank You ,Ian Wells
Kerinvale Comaudio,
3A Murchison Street, Biloela.4715
Ph 0749922449 Mb 0409159932 
Hm 0749922574 Fx 0749922767
www.kerinvalecomaudio.com.au
 




 <><>

Re: [Repeater-Builder] Re: Coax shielding

[kerincom]

 
I have a bandpass/band notch diplexer that I am currently tuning up to
replace the 6ld450s so we will see how it goes shortly .

 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: skipp025
Date: 6/29/2010 1:44:33 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Coax shielding
 
  

> "Ian Wells"  wrote:
> Currently I have no filters between the link transmitter 
> and its antenna.

The next question in our Top Twenty Radio Hits - Countdown List 
is "do you have any spare or available cavities to try a few 
things we might suggest?" 

"Selection B" Are any extra or "available to test with" Cavities 
configured as band-pass, notch or some combination there of? 

s. 

"Selection C" Would you know the next winning 6 numbers for the 
Wednesday Evening California Supper Lotto? 

 forget Selection C



 

Re: [Repeater-Builder] Re: Coax shielding

[kerincom]

 
Hi skip .The repeater radios are maxon sm4450sc and the link is a tait t2010
The test I have tried in the past have been definitely point to the link
being the problem as when we turn the link off the repeater works to its
full range but with it on we get desence.
We used to have the link closer to the repeaters aprox 487mhz but we shifted
it to 517mhz to fix desense and we find we are still having problems.I think
the white noise could be the issue but I  tried a notch on the link cable
tuned to the  repeaters receive and that seem to cause more interference and
weaken the links Transmit range.I wondered about putting a BP cavity filter
inline with the link but since our link frequencies are 5.2mhz apart I feel
you can only tuned the filter for either TX or rx frequencies and not  both
Unless maybe you can install two in pararell ,one  tuned to TX and the other
rx .
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: skipp025
Date: 6/28/2010 2:50:00 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Coax shielding
 
  

> "kerincom "  wrote:
> Hi guys .I am just wanted to confirm a question on 
> coax shielding .


 

Re: [Repeater-Builder] Coax shielding

[kerincom]

Ok thanks .I will upgrade the diplexer and see how that goes I might have to
change all my repeaters the same . 
 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Doug Bade
Date: 6/28/2010 2:08:45 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax shielding
 
  
In theory most xtal radios are quieter than synthesized ones, but a 
filter would seem to be the better thing to do as it really stops the 
problem...even a bandpass can or 2 on the link radio would be acceptable 
if a notch is not available.. I just offered a notch duplexer option as 
they can be bought sub 150.00 usd... and probably a lot less off ebay..

"I" would fix the noise potential rather than swap the tx for another 
model.. but I have different options available to me than maybe you 
do... If the site were at a "remote" location for me.. I try to make it 
bulletproof so I do not have to deal with it.. :-)

Doug

kerincom wrote:
> 
>
> Would it be better to change the link radio to crystal instead of 
> programmed .It is currently a tait t2010 
> 
> 
> 
> 
>  
> Thank You,
> Ian Wells,
> Kerinvale Comaudio,
> 3A Murchison Street,Biloela.4715
> Ph 0749922449 or 0409159932 or 0749922574
> www.kerinvalecomaudio.com.au <http://www.kerinvalecomaudio.com.au/>
> 
> /---Original Message---/
> 
> /*From:*/ Doug Bade <mailto:k...@thebades.net>
> /*Date:*/ 6/28/2010 1:44:27 AM
> /*To:*/ Repeater-Builder@yahoogroups.com 
> <mailto:Repeater-Builder@yahoogroups.com>
> /*Subject:*/ Re: [Repeater-Builder] Coax shielding
> 
> 
>
> Ian;
> It would seem that at uhf ~30mhz away cable leakage in the shed
> would seem to be less likely than antenna to antenna interference. In
> general it is the white noise generated by a transmitter on other
> frequencies that is most likely to cause desense to a co located rx.
>
> Assuming you have double shielded or better on the repeater, the leakage
> in the shed from the single shielded link radio would not seem to
> radiate enough to be an issue. If the radio side of the main duplexer is
> also rg213, well that is another matter :-)
> If you are using a notch only duplexer for the main duplexer, it would
> not protect you from another transmitter besides it's own.. Typical
> mobile type size duplexers at UHF are really only designed to protect
> the rx from it's local tx, any other can slip right in..
>
> I would try a notch filter ( or half a notch duplexer ) on the link tx
> to suppress the station rx frequency from it's output.. that noise is
> probably the culprit..
>
> As said by others, good double shielded cables and /or 100 % corrugated
> types are suggested in sites with multiple transmitters to deal with..
> but most on site desense I have dealt with from other transmitters comes
> from one of 2 things.. raw power front end overload of the rx when the
> antennas can see each other... or white noise generated on broad
> frequencies from an unfiltered transmitter. I am suggesting a notch
> cavity on the 517 transmitter output that notches 478.675 in this case..
> 3 slugs ( one side) on a mobile duplexer will suppress that noise ~65db,
> and provide no significant insertion loss to the link tx..And double
> shielded cables like RG142 for radio to filter connections is perfectly
> adequate up to 520 mhz and beyond... with isolation to -120dbm at a
> minimum..
>
> Doug
> KD8B
>
> kerincom wrote:
> >
> >
> > Uhf the link is 517mhz and the repeater TX/rx pair is 473.475 and
> > 478.675mhz on one repeater and it is in a weak area with the main
> > site so it has to transmitt aprox 10 watts
> >
> >
> >
> >
> > kerincom wrote:
> > >
> > >
> > > Hi guys .I am just wanted to confirm a question on coax shielding .
> > > With 2-10 watts transmitting through rg213u could rf be escaping that
> > > could cause desensitization to other radios .The repeater I have
> > > setup uses 9 meters of heliax from the main diplexer to ant and
> > > rg213u from the link radio to its antenna .
> > > I am finding I am getting problems with the link
> > > transmission interfering with the repeater rx The link antenna is a
> > > yagi 3 meters above the ground and the main repeater antenna is 6
> > > meters above it .I am currently trying band pass cavity on the
> > > receiver rx or band pass/band reject diplexer with some success but I
> > > am wondering if the rf escaping from the cable is causing problems
> > > inside the repeater shed even at a low wattage .I am definitely
> > > changing the rg213u to either rg223u or lmr400 as it is only on the
> > > link radio and shouldn't have any effect on the repeater's operation
> > > .Has anyone else had the same sort of problem where the rf energy
> > > leaks out of the cable in the shed and causes problems to the repeater
> > > and they had to upgrade the link cable to 100% coverage cable
> >
> >
> >
> >
> >
> >
>
> 
>
> 
>
> 



 

Re: [Repeater-Builder] Coax shielding

[kerincom]

That's what I thought as I am currently using a 6ld450s notch diplexer and
should change it to a band pass/band reject diplexer .I tried a experiment
on site where I added 1 cavity inline with the receiver 478.675 and it
seemed to improve the problem  .so that was going to be the next step but I
thought I might see what the thoughts were on the coax leaking 
 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Doug Bade
Date: 6/28/2010 1:44:27 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax shielding
 
  
Ian;
It would seem that at uhf ~30mhz away cable leakage in the shed 
would seem to be less likely than antenna to antenna interference. In 
general it is the white noise generated by a transmitter on other 
frequencies that is most likely to cause desense to a co located rx.

Assuming you have double shielded or better on the repeater, the leakage 
in the shed from the single shielded link radio would not seem to 
radiate enough to be an issue. If the radio side of the main duplexer is 
also rg213, well that is another matter :-)
If you are using a notch only duplexer for the main duplexer, it would 
not protect you from another transmitter besides it's own.. Typical 
mobile type size duplexers at UHF are really only designed to protect 
the rx from it's local tx, any other can slip right in..

I would try a notch filter ( or half a notch duplexer ) on the link tx 
to suppress the station rx frequency from it's output.. that noise is 
probably the culprit..

As said by others, good double shielded cables and /or 100 % corrugated 
types are suggested in sites with multiple transmitters to deal with.. 
but most on site desense I have dealt with from other transmitters comes 
from one of 2 things.. raw power front end overload of the rx when the 
antennas can see each other... or white noise generated on broad 
frequencies from an unfiltered transmitter. I am suggesting a notch 
cavity on the 517 transmitter output that notches 478.675 in this case.. 
3 slugs ( one side) on a mobile duplexer will suppress that noise ~65db, 
and provide no significant insertion loss to the link tx..And double 
shielded cables like RG142 for radio to filter connections is perfectly 
adequate up to 520 mhz and beyond... with isolation to -120dbm at a 
minimum..

Doug
KD8B

kerincom wrote:
> 
>
> Uhf the link is 517mhz and the repeater TX/rx pair is 473.475 and 
> 478.675mhz on one repeater and it is in a weak area with the main 
> site so it has to transmitt aprox 10 watts 
> 
> 
>
>
> kerincom wrote:
> >
> >
> > Hi guys .I am just wanted to confirm a question on coax shielding .
> > With 2-10 watts transmitting through rg213u could rf be escaping that
> > could cause desensitization to other radios .The repeater I have
> > setup uses 9 meters of heliax from the main diplexer to ant and
> > rg213u from the link radio to its antenna .
> > I am finding I am getting problems with the link
> > transmission interfering with the repeater rx The link antenna is a
> > yagi 3 meters above the ground and the main repeater antenna is 6
> > meters above it .I am currently trying band pass cavity on the
> > receiver rx or band pass/band reject diplexer with some success but I
> > am wondering if the rf escaping from the cable is causing problems
> > inside the repeater shed even at a low wattage .I am definitely
> > changing the rg213u to either rg223u or lmr400 as it is only on the
> > link radio and shouldn't have any effect on the repeater's operation
> > .Has anyone else had the same sort of problem where the rf energy
> > leaks out of the cable in the shed and causes problems to the repeater
> > and they had to upgrade the link cable to 100% coverage cable
>
> 
>
> 
>
> 



 

Re: [Repeater-Builder] Coax shielding

[kerincom]

Would it be better to change the link radio to crystal instead of programmed
.It is currently a tait t2010 
 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Doug Bade
Date: 6/28/2010 1:44:27 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax shielding
 
  
Ian;
It would seem that at uhf ~30mhz away cable leakage in the shed 
would seem to be less likely than antenna to antenna interference. In 
general it is the white noise generated by a transmitter on other 
frequencies that is most likely to cause desense to a co located rx.

Assuming you have double shielded or better on the repeater, the leakage 
in the shed from the single shielded link radio would not seem to 
radiate enough to be an issue. If the radio side of the main duplexer is 
also rg213, well that is another matter :-)
If you are using a notch only duplexer for the main duplexer, it would 
not protect you from another transmitter besides it's own.. Typical 
mobile type size duplexers at UHF are really only designed to protect 
the rx from it's local tx, any other can slip right in..

I would try a notch filter ( or half a notch duplexer ) on the link tx 
to suppress the station rx frequency from it's output.. that noise is 
probably the culprit..

As said by others, good double shielded cables and /or 100 % corrugated 
types are suggested in sites with multiple transmitters to deal with.. 
but most on site desense I have dealt with from other transmitters comes 
from one of 2 things.. raw power front end overload of the rx when the 
antennas can see each other... or white noise generated on broad 
frequencies from an unfiltered transmitter. I am suggesting a notch 
cavity on the 517 transmitter output that notches 478.675 in this case.. 
3 slugs ( one side) on a mobile duplexer will suppress that noise ~65db, 
and provide no significant insertion loss to the link tx..And double 
shielded cables like RG142 for radio to filter connections is perfectly 
adequate up to 520 mhz and beyond... with isolation to -120dbm at a 
minimum..

Doug
KD8B

kerincom wrote:
> 
>
> Uhf the link is 517mhz and the repeater TX/rx pair is 473.475 and 
> 478.675mhz on one repeater and it is in a weak area with the main 
> site so it has to transmitt aprox 10 watts 
> 
> 
>
>
> kerincom wrote:
> >
> >
> > Hi guys .I am just wanted to confirm a question on coax shielding .
> > With 2-10 watts transmitting through rg213u could rf be escaping that
> > could cause desensitization to other radios .The repeater I have
> > setup uses 9 meters of heliax from the main diplexer to ant and
> > rg213u from the link radio to its antenna .
> > I am finding I am getting problems with the link
> > transmission interfering with the repeater rx The link antenna is a
> > yagi 3 meters above the ground and the main repeater antenna is 6
> > meters above it .I am currently trying band pass cavity on the
> > receiver rx or band pass/band reject diplexer with some success but I
> > am wondering if the rf escaping from the cable is causing problems
> > inside the repeater shed even at a low wattage .I am definitely
> > changing the rg213u to either rg223u or lmr400 as it is only on the
> > link radio and shouldn't have any effect on the repeater's operation
> > .Has anyone else had the same sort of problem where the rf energy
> > leaks out of the cable in the shed and causes problems to the repeater
> > and they had to upgrade the link cable to 100% coverage cable
>
> 
>
> 
>
> 



 

RE: [Repeater-Builder] Coax shielding

[kerincom]

Jumpers between the TX ,rx and diplexer are rg223u .I thought of using
rg223u for the link radio to its antenna because it is only aprox 2-3meters
long but I felt I should try lmr400 because of the 100% shielding and the
link radio is just a standard radio that works in either rx or TX mode and
not in duplex mode 
 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Eric Lemmon
Date: 6/28/2010 1:24:37 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Coax shielding
 
  
Ian,

RG-213 coax can definitely contribute to desense, as can cheap connectors
and adapters. I suggest making up new jumpers using double-shielded coax
such as RG-400 or RG-214, and fit these jumpers with high-quality, crimp-on
connectors of the correct type on each end so that no adapters or barrels
are needed. Don't use LMR400 or similar foil-and-braid cable, as that will
add entirely new problems to the mix. If changing the jumpers still leaves
some desense, then try increasing the spacing between the link and main
antennas- lowering the link antenna should be the first step.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups
com] On Behalf Of kerincom 
Sent: Sunday, June 27, 2010 7:51 AM
To: mail=repeater-buil...@yahoogroups.com
Subject: [Repeater-Builder] Coax shielding

Hi guys .I am just wanted to confirm a question on coax shielding .
With 2-10 watts transmitting through rg213u could rf be escaping that could
cause desensitization to other radios .The repeater I have setup uses 9
meters of heliax from the main diplexer to ant and rg213u from the link
radio to its antenna .
I am finding I am getting problems with the link transmission interfering
with the repeater rx The link antenna is a yagi 3 meters above the ground
and the main repeater antenna is 6 meters above it .I am currently trying
band pass cavity on the receiver rx or band pass/band reject diplexer with
some success but I am wondering if the rf escaping from the cable is causing
problems inside the repeater shed even at a low wattage .I am definitely
changing the rg213u to either rg223u or lmr400 as it is only on the link
radio and shouldn't have any effect on the repeater's operation .Has anyone
else had the same sort of problem where the rf energy leaks out of the cable
in the shed and causes problems to the repeater and they had to upgrade the
link cable to 100% coverage cable


  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au <http://www.kerinvalecomaudio.com.au> 



 

Re: [Repeater-Builder] Coax shielding

[kerincom]

Uhf the link is 517mhz and the repeater TX/rx pair is 473.475 and 478.675mhz
on one repeater and it is in a weak area  with the main site so it has to
transmitt aprox 10 watts 
 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Doug Bade
Date: 6/28/2010 12:59:24 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax shielding
 
  
At UHF, possibly, at VHF unlikely... you did not specify :-)
How close are the frequencies??? Lots of details left out for us to help.
If the freq's are within a few hundred kiloherts at vhf, antenna 
separation is probably the issue...
More details please??
Doug
KD8B

kerincom wrote:
> 
>
> Hi guys .I am just wanted to confirm a question on coax shielding .
> With 2-10 watts transmitting through rg213u could rf be escaping that 
> could cause desensitization to other radios .The repeater I have 
> setup uses 9 meters of heliax from the main diplexer to ant and 
> rg213u from the link radio to its antenna .
> I am finding I am getting problems with the link 
> transmission interfering with the repeater rx The link antenna is a 
> yagi 3 meters above the ground and the main repeater antenna is 6 
> meters above it .I am currently trying band pass cavity on the 
> receiver rx or band pass/band reject diplexer with some success but I 
> am wondering if the rf escaping from the cable is causing problems 
> inside the repeater shed even at a low wattage .I am definitely 
> changing the rg213u to either rg223u or lmr400 as it is only on the 
> link radio and shouldn't have any effect on the repeater's operation 
> .Has anyone else had the same sort of problem where the rf energy 
> leaks out of the cable in the shed and causes problems to the repeater 
> and they had to upgrade the link cable to 100% coverage cable
> 
> 
>  
> Thank You,
> Ian Wells,
> Kerinvale Comaudio,
> 3A Murchison Street,Biloela.4715
> Ph 0749922449 or 0409159932 or 0749922574
> www.kerinvalecomaudio.com.au <http://www.kerinvalecomaudio.com.au>
> 
>
> 
>
> 



 

[Repeater-Builder] Coax shielding

[kerincom]

Hi guys .I am just wanted to confirm a question on coax shielding .
With 2-10 watts transmitting through rg213u  could rf be escaping that could
cause desensitization  to other radios .The repeater I have setup uses 9
meters of heliax from the main diplexer to ant  and rg213u from the link
radio to its antenna  .
I am finding I am getting problems with the link transmission interfering
with the  repeater rx The link antenna is a yagi 3 meters above the ground
and the main repeater antenna is 6 meters above it .I am currently trying
band pass cavity on the receiver rx or band pass/band reject diplexer with
some success but I am wondering if the rf escaping from the cable is causing
problems inside the repeater shed even at a low wattage .I am definitely
changing the rg213u to either rg223u or lmr400 as it is only on the link
radio and shouldn't have any effect on the repeater's operation .Has anyone
else had the same sort of problem where the rf energy leaks out of the cable
in the shed and causes problems to the repeater and they had to upgrade the
link cable to 100% coverage cable

 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au

 

RE: [Repeater-Builder] kyodo kg108 uhf

[kerincom]

It is used specially for radio programming and has worked ok with other
software .what would be the best com port settings to have  
 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Ross Johnson
Date: 06/12/10 05:37:52
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] kyodo kg108 uhf
 
  
You know that com port works? Older machines serial ports were poorly or not
even buffered sometimes. Also if this is a programming laptop, where you use
it to program other radios, make sure none of the other programming software
is tying up that com port while the machine is running. 
 
Ross kc7rjk
 
-Original Message-
From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups
com] On Behalf Of kerincom 
Sent: Friday, June 11, 2010 7:49 AM
To: mail=repeater-buil...@yahoogroups.com
Subject: Re: [Repeater-Builder] kyodo kg108 uhf
 
  
Already done that  
 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: wd8chl
Date: 06/11/10 23:30:03
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] kyodo kg108 uhf
 
  
On 6/11/2010 7:45 AM, kerincom wrote:
>
>
> Hi guys .I have the genuine software and programming cable and kg108 uhf
> radios and I am trying to read and program them .The software is installed
> on a Toshiba 700mhnz laptop running win98se .and when I try to communicate
> with the radio it comes up with error in communications .I have tried
> running it in dos and still the same .It seems to be a com error because I
> have 2 programming cables and the get the same result with both.Can anyone
> suggest anything

I'm not familiar with those, but chances are if they are more than 6-8 
years old, the software is DOS, and Windows won't allow control of the 
RS-232 port the way it wants. Hit the 'Start' button, and in the 
shutdown menu, one selection will be "Restart in MS-DOS mode." Select 
that, and it will take you to a true DOS environment. You'll have to 
navigate back to the directory you have your program in from there using 
DOS commands.

Jim
 
  



 

Re: [Repeater-Builder] kyodo kg108 uhf

[kerincom]

Already done that  
 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: wd8chl
Date: 06/11/10 23:30:03
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] kyodo kg108 uhf
 
  
On 6/11/2010 7:45 AM, kerincom wrote:
>
>
> Hi guys .I have the genuine software and programming cable and kg108 uhf
> radios and I am trying to read and program them .The software is installed
> on a Toshiba 700mhnz laptop running win98se .and when I try to communicate
> with the radio it comes up with error in communications .I have tried
> running it in dos and still the same .It seems to be a com error because I
> have 2 programming cables and the get the same result with both.Can anyone
> suggest anything

I'm not familiar with those, but chances are if they are more than 6-8 
years old, the software is DOS, and Windows won't allow control of the 
RS-232 port the way it wants. Hit the 'Start' button, and in the 
shutdown menu, one selection will be "Restart in MS-DOS mode." Select 
that, and it will take you to a true DOS environment. You'll have to 
navigate back to the directory you have your program in from there using 
DOS commands.

Jim


 

Re: [Repeater-Builder] kyodo kg108 uhf

[kerincom]

It is  
 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Gareth Bennett
Date: 06/11/10 21:56:28
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] kyodo kg108 uhf
 
  
 
Check to see if the com port in the software matches your laptops com port
(Usually COM1)
 
Cheers
 
Gareth Bennett
 
RadioSystems
P.O. Box 5202
Dunedin  9024
New Zealand

gare...@radsys.co.nz

- Original Message - 
From: kerincom 
To: mail=repeater-buil...@yahoogroups.com 
Sent: Friday, June 11, 2010 11:45 PM
Subject: [Repeater-Builder] kyodo kg108 uhf


  
 
Hi guys .I have the genuine software and programming cable and kg108 uhf
radios and I am trying to read and program them .The software is installed
on a Toshiba 700mhnz laptop running win98se .and when I try to communicate
with the radio it comes up with error in communications .I have tried
running it in dos  and still the same .It seems to be a com error because I
have 2 programming cables and the get the same result with both.Can anyone
suggest anything 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 




 

[Repeater-Builder] kyodo kg108 uhf

[kerincom]

 
Hi guys .I have the genuine software and programming cable and kg108 uhf
radios and I am trying to read and program them .The software is installed
on a Toshiba 700mhnz laptop running win98se .and when I try to communicate
with the radio it comes up with error in communications .I have tried
running it in dos  and still the same .It seems to be a com error because I
have 2 programming cables and the get the same result with both.Can anyone
suggest anything 

 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 

RE: [Repeater-Builder] Old TV transmitters

[kerincom]

My email was rejected
 
 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: kerincom
Date: 05/12/10 20:00:16
To: mail=repeater-buil...@yahoogroups.com
Subject: RE: [Repeater-Builder] Old TV transmitters
 
Ill give them a go
 
 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Barry
Date: 05/12/10 19:54:34
To: repeater-builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Old TV transmitters
 
  
What about the Brisbane vhf group  ?

http://www.qdg.org.au/


or CBRS ( city of Brisbane radio society )




To: Repeater-Builder@yahoogroups.com
From: kerin...@pacific.net.au
Date: Wed, 12 May 2010 19:41:59 +1000
Subject: [Repeater-Builder] Old TV transmitters

  
 
Hi guys .I know this is off subject but would anyone know where we can
information on a electronka pee-15v TV transmitter
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
 









Find it at CarPoint.com.au New, Used, Demo, Dealer or Private? 
 
 

RE: [Repeater-Builder] Old TV transmitters

[kerincom]

Ill give them a go
 
 
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Barry
Date: 05/12/10 19:54:34
To: repeater-builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Old TV transmitters
 
  
What about the Brisbane vhf group  ?

http://www.qdg.org.au/


or CBRS ( city of Brisbane radio society )




To: Repeater-Builder@yahoogroups.com
From: kerin...@pacific.net.au
Date: Wed, 12 May 2010 19:41:59 +1000
Subject: [Repeater-Builder] Old TV transmitters

  
 
Hi guys .I know this is off subject but would anyone know where we can
information on a electronka pee-15v TV transmitter
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
 









Find it at CarPoint.com.au New, Used, Demo, Dealer or Private? 

 

[Repeater-Builder] Old TV transmitters

[kerincom]

 
Hi guys .I know this is off subject but would anyone know where we can
information on a electronka pee-15v TV transmitter
 
 
 
  
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
 

[Repeater-Builder] Tait t2020

[kerincom]

Hi guys .I have a t2020 VHF low 66-88mhz and I have the windows 2020
software 2.7 and when I try to read a radio 
I have it comes up with the wrong version error .when I interrogate the
radio the db comes up with .any suggestions  
 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 

[Repeater-Builder] Ctcss detection

[kerincom]

Hi guys .A long time ago there was a series of post over the ctcss detection
time and I am wondering if anyone can suggest which radios are the fastest
on ctcss detection
 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 

Re: [Repeater-Builder] Maxon sm4450ne

[kerincom]

Your ok  
 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: wd8chl
Date: 3/17/2010 12:57:22 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Maxon sm4450ne
 
  
On 3/16/2010 10:16 AM, kerincom wrote:
> Hi .I in Australia and over here there are lmr frequencies over 512mhz and
> the split is 10meg but if the radio is uncapable of the 517mhz then I will
> have to replace them with a radio that can operate on those frequencies
>

Oh-woops-for some reason it looked to me like you were from 
Coloradough...I'll go away now...

>
> 
>
> Thank You,
>
> Ian Wells,
>
> Kerinvale Comaudio,
>
> 361 Camboon Road.Biloela.4715
>
> Ph 0749922449 or 0409159932 or 0749922574
>
> www.kerinvalecomaudio.com.au



 

Re: [Repeater-Builder] Maxon sm4450ne

[kerincom]

Hi .I in Australia and over here there are lmr frequencies over 512mhz and
the split is 10meg but if the radio is uncapable of the 517mhz then I will
have to replace them with a radio that can operate on those frequencies  
 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: wd8chl
Date: 03/17/10 00:07:05
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Maxon sm4450ne
 
  
On 3/16/2010 4:37 AM, Ham-Radio wrote:
> Ian,
>
> The SM-4450-NE is 488 to 512. If you program 517 you are out of band for
> that radio..

In fact, 517 is out of band period. The top of the LMR band is 512, so 
if someone is asking you to program 517, they are asking you to do 
something illegal. Maybe it was a typo???
Since the normal repeater split up there is 3 MHz, I suspect it's either 
507 and 510, or more likely 511 and 508.

> _
>
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Ian Wells
> Sent: Monday, March 15, 2010 11:20 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Maxon sm4450ne
>
>
>
>
>
> Hi guys .I have a sm4450ne and I am having problems with setting it up for
> 507 and 517 mhz .I have set 2 up till now and they are working fine except
> these NE are having problems with the vco lock error 3 .I am wondering if
> anyone can shed some light .I can set it up for rx on 507 but it wont lock
> on transmitt.
>
> Thank You ,Ian Wells
> Kerinvale Comaudio,
> 361 Camboon road, Biloela.4715
> Ph 0749922449 Mb 0409159932
> Hm 0749922574 Fx 0749922767
> www.kerinvalecomaudio.com.au
>
>
> 
>
>
>
>



 

RE: [Repeater-Builder] Maxon sm4450ne

[kerincom]

Thanks for the reply.I felt that would be the case but I am still bushed to
explain the two radios I am currently using as a repeater one on 517 and the
other on 507 and their working well as far as I know .I have come across one
or two of these radios that even programming them in band I carn;t get them
to lock at one end of the band so they must be faulty  
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Ham-Radio
Date: 3/16/2010 6:38:12 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Maxon sm4450ne
 
  
Ian,
 
The SM-4450-NE is 488 to 512. If you program 517 you are out of band for
that radio.. The ones I have are the NC 450-470 and two special order NB
420-450 radios. The NB are not available anymore.
 
I know on the ones I have, when you get more than about 1 MHz out of band
the PLL will unlock with error 3.
 
I hope this helps.
 
Charles Miller
 




From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups
com] On Behalf Of Ian Wells
Sent: Monday, March 15, 2010 11:20 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Maxon sm4450ne


Hi guys .I have a sm4450ne and I am having problems with setting it up for
507 and 517 mhz .I have set 2 up till now and they are working fine except
these NE are having problems with the vco lock error 3 .I am wondering if
anyone can shed some light .I can set it up for rx on 507 but it wont lock
on transmitt.
 
Thank You ,Ian Wells
Kerinvale Comaudio,
361 Camboon road, Biloela.4715
Ph 0749922449 Mb 0409159932 
Hm 0749922574 Fx 0749922767
www.kerinvalecomaudio.com.au
 




 

[Repeater-Builder] Collinear mount tube pressure

[kerincom]

Hi guys .I would like to know if other installers have run into the
following problem .Installing a collinear base antenna to mounting tube and
have turned the u bolts up too tight that the antenna either doesn't work or
cracking occurs in repeater .
One site I did, I installed a brand new uhf collinear and it had no range
and after inspecting it found nothing that I could see wrong .After
reinstalling it with a little less pressure on the clamps its working ok
with no worries.
The second one I have done works but crackles and I hope to check it today 
I just wondered if anyone else has had this issue when installing repeater
antennas and worked out a suitable tension pressure that the u bolts can be
tighten too that doesn't cause any problems .
 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 

Re: [Repeater-Builder] Re: Notching nearby frequencies

[Kerincom]

I have considered that to install a notch in the link which is usually a 3
watt transmitter and I have felt this would be better than notching the 479
350 which is the input to the repeater which seems to be reducing its
sensitivity .I am currently using a 6inch cavity filter and a extra 6mc450s
diplexer to notch the signal out and tuned up on a service monitor. The
Repeater uses a 6db on a 9meter mast and the link is connected to a beam at
the bottom of the mast
.If the site was in a better location than I could reduce the link below 1
watt and it shouldn't affect the 479.350 input but that's hard to do .I also
found some information about using isolators on the transmitters and on the
receiver to filter the signal that is to be removed.I wonder if that would
work better.
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: chartmd83
Date: 14/02/2009 14:18:40
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Notching nearby frequencies
 
Ian,

What you would like to do is not difficult just may be expensive if
you do not have the filters you would need. 

You described your situation as you want to receive on 479.350 and
you have a link transmitter on 481.825 on the same or nearby antenna.

As the 481.825 is a link transmitter you may have better luck putting
a Notch filter on the output of the 481.825 that would notch the
479.350 signal away from 481.825.

You could stand to loose a few DB on the transmit unless you have a
broad notch filter which would mean you may need more than one to
tighten your notch in favor of 479.350 and allow more pass of the
481.825. This may mean more insertion loss for the 481 transmit so as
long as you can stand to loose the signal then that should adjust the
interfering frequency better.

As a note you can use Pass as long as there is enough of it and these
get expensive.

Jason

--- In Repeater-Builder@yahoogroups.com, "Kerincom"  wrote:
>
> Hi guys .Can you clarify something for me .I have a repeater that
receives
> on 479.350 and has a link transmitter on 481.825 and I would like to
filter
> the 481.825 out so it doesn't affect the 479.350. I currently have
between
> the diplexer and the 479.350 receiver -a band pass cavity tuned to
479.350
> and a notch diplexer tuned to notch the 481.825 .
> I am concerned that this is reducing the receiver sensitivity and
feel I
> would be better to have the band pass between the diplexer and
receiver and
> using a t piece connect the notch to the t piece
> Current setup Diplexer--band pass cavitynotch
diplexerreceiver
> 
> Proposed setup Diplexer -- band pass cavity ---t piece receiver
> 

> Notch
> I will try the proposed setup shortly on on a hp service monitor to
see if I
> am better this way
> 
> Thank You,
> Ian Wells,
> Kerinvale Comaudio,
> 361 Camboon Road.Biloela.4715
> Phone 0749922574 or 0409159932
> www.kerinvalecomaudio.com.au
>



 

[Repeater-Builder] Notching nearby frequencies

[Kerincom]

Hi guys .Can you clarify something for me .I have a repeater that receives
on 479.350 and has a link transmitter on 481.825 and I would like to filter
the 481.825 out so it doesn't affect the 479.350. I currently have between
the diplexer and the 479.350 receiver -a band pass cavity tuned to 479.350
and a notch diplexer tuned to notch the 481.825 .
I am concerned that this is reducing the receiver sensitivity and feel  I
would be better to have the band pass between the diplexer and receiver and
using a t piece connect the notch to the t piece
Current setup Diplexer--band pass cavitynotch diplexerreceiver

Proposed setup  Diplexer -- band pass cavity ---t piece receiver

   Notch
I will try the proposed setup shortly on on a hp service monitor to see if I
am better this way

Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 

Re: [Repeater-Builder] Re: New wind generator group

[Kerincom]

It is designed as a technical group. 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: skipp025
Date: 12/24/08 12:23:38
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: New wind generator group
 

Is it a technical or political group? 

:-) 

> Hi there .Just a quick email to let you know that I 
> have formed a new group on yahoo for discussion about 
> wind generators.
> http://groups.yahoo.com/group/windgenerators


 
 

[Repeater-Builder] New wind generator group

[Kerincom]

Hi there .Just a quick email to let you know that I have formed a new group
on yahoo for discussion about wind generators.
http://groups.yahoo.com/group/windgenerators
windgenerat...@yahoogroups.com
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
 
 
 

[Repeater-Builder] FT-857

[Kerincom]

 I know this is a bit off group but someone might know .I have a client that
has brought in a FT857 
Which had a burned out cap in the head unit c4029 and damaged q4002 
Reg .I have replaced the cap and 
I have a replacement reg supplying 5v to the micro chip and the 8v rail 
Is ok but I have no operation out of the head unit .All I get is a 
Blank screen with no operation from anything .I have the service manual 
And are checking different components.Can anyone suggest what might be 
Wrong or where to check .thanks Ian


 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
 
 
 

[Repeater-Builder] Tle amps

[Kerincom]

Hi guys .Can anyone tell me the website for tle rf amps for Motorola
repeaters
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 

Re: [Repeater-Builder] Linear uhf amp

[Kerincom]

Thanks Ed .he says giday back 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Com/Rad Inc
Date: 10/10/2008 8:27:02 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Linear uhf amp
 
Hello Ian
 
Call Geoff Lee at R F Technology in Hhornsby NSW
Tell him I sent you !
G'day
 
Ed Folta
Transworld Technologies Inc
- Original Message - 
From: Kerincom 
To: Repeater-Builder@yahoogroups.com 
Sent: Wednesday, October 08, 2008 11:40 PM
Subject: [Repeater-Builder] Linear uhf amp


 
Hi guys .Would anyone know where I can get a 100 watt uhf commercial amp
450-500mhz in Australia or us
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 







No virus found in this incoming message.
Checked by AVG - http://www.avg.com 
Version: 8.0.173 / Virus Database: 270.7.6/1710 - Release Date: 10/6/2008
9:23 AM

 
 

Re: [Repeater-Builder] Linear uhf amp

[Kerincom]

 I will .thanks  
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Com/Rad Inc
Date: 10/10/2008 8:27:02 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Linear uhf amp
 
Hello Ian
 
Call Geoff Lee at R F Technology in Hhornsby NSW
Tell him I sent you !
G'day
 
Ed Folta
Transworld Technologies Inc
- Original Message - 
From: Kerincom 
To: Repeater-Builder@yahoogroups.com 
Sent: Wednesday, October 08, 2008 11:40 PM
Subject: [Repeater-Builder] Linear uhf amp


 
Hi guys .Would anyone know where I can get a 100 watt uhf commercial amp
450-500mhz in Australia or us
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 







No virus found in this incoming message.
Checked by AVG - http://www.avg.com 
Version: 8.0.173 / Virus Database: 270.7.6/1710 - Release Date: 10/6/2008
9:23 AM

 
 

Re: [Repeater-Builder] Linear uhf amp

[Kerincom]

So the micor amps need 13.8 and 9volts as well?.I have seen one on there  
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: George Henry
Date: 10/10/2008 4:23:39 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Linear uhf amp
 
Micor and MSR2000 amps show up on E-Bay fairly often...  1/2 watt in gets
you 110 out, needs 13.8 and 9.2 - 9.6 volts.
Check the model numbers or pix:  there are intermittent (shallow heat sink
fins, partway across) and continuous duty (deep heat sink fins, all the way
across) models!
 
 
George, KA3HSW / WQGJ413




- Original Message 
From: Kerincom <[EMAIL PROTECTED]>
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, October 8, 2008 11:40:46 PM
Subject: [Repeater-Builder] Linear uhf amp


 
Hi guys .Would anyone know where I can get a 100 watt uhf commercial amp
450-500mhz in Australia or us
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela. 4715
Phone 0749922574 or 0409159932
www.kerinvalecomaud io.com.au
 



 
 

[Repeater-Builder] Linear uhf amp

[Kerincom]

 
Hi guys .Would anyone know where I can get a 100 watt uhf commercial amp
450-500mhz in Australia or us
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 

[Repeater-Builder] 6ld450s rfs

[Kerincom]

Hi guys would anyone have the spec sheet for the above diplexer
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 

Re: [Repeater-Builder] Maxon sm4450

[Kerincom]

thanks.The sm4450 radios I have here are identical outside to the ones that
produce 40 watt but only reach 25 when the avc is turned up 
They are all 16 channel with a heatsink .one of the models are sm4450sc
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Jim Miller WB5OXQ in Waco
Date: 2/10/2008 5:52:21 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Maxon sm4450
 
The sm 4450 is a 16 channel 40 watt uhf transciever.  There is a 25 watt uhf
model but it has only 4 channels and is capable of 40 watts also by
adjusting a pot inside but it does not have enough heat sink to run at 40
watts more than a few seconds so I would not advise it even with a fan.
wb5oxq
- Original Message - 
From: Kerincom 
To: Repeater-Builder@yahoogroups.com 
Sent: Wednesday, October 01, 2008 9:38 AM
Subject: [Repeater-Builder] Maxon sm4450


Hi guys .Can anyone advise the difference between the 25 watt and the 40
watt version of the above radio and can the 25 watt version  be upgraded to
the 40 watt
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
 

 



 
 

[Repeater-Builder] Maxon sm4450

[Kerincom]

Hi guys .Can anyone advise the difference between the 25 watt and the 40
watt version of the above radio and can the 25 watt version  be upgraded to
the 40 watt
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
 
 
 

Re: [Repeater-Builder] Re: Cavity interconnection cable length

[Kerincom]

Hi guys .just been following this thead .When you talk about 1/4 wavelength 
is there a formula  available to make these coax lengths.
I found a calculator and I am wondering if this is the right one http://www
csgnetwork.com/freqwavelengthcalc.html
Going off that 1/4 wavelength for my coax's should be 0.15 meters or 6
inches which is very short.
Does this 1/4 wavelength work between the transmitter and the diplexer as
well as interconnection cable length or should we have a different length
for it .
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: ka1jfy
Date: 18/09/2008 6:41:57 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Cavity interconnection cable length
 
One of our engineers had a factory tour of EMR.
They did NOT calculate critical cable lengths, rather they had a pile 
of various length cables that they swapped in until it met specs. 
They were NOT optimized.

That same engineer finally got a SWAG from them that the loops in the 
EMR cavities are approximately 1/10th of a wavelength for calculation 
purposes.
That figure seems to have served us well over the last few years.
I'll ask whether I can publish the spreadsheet that we use for those 
calculations.
We use an HP 8711C network analyser to setup the cavities for our UHF 
radio system, and various other users [VHF, UHF, 800].

Walter, KD7BJJ

--- In Repeater-Builder@yahoogroups.com, "kb9bpf" <[EMAIL PROTECTED]> wrote:
>
> Hello,
> 
> Many writings about the optimum length of cavity interconnecting 
cables 
> mention that the length of the coupling loops needs to be taken 
into 
> account, but they don't get any more specific. 
> 
> Does that mean the length of the conductor in the loop 
(circumference 
> if it were round) or connector-to-end length (diameter if it were 
> round) or something else?
> 
> I find it pretty easy to get the cables cut to a pretty precise 
> electrical 1/4 wavelength but this loop length thing leaves me 
guessing.
> 
> 73
> Brad KB9BPF
>


 
 

Re: [Repeater-Builder] Dual battery system

[Kerincom]

Sorry guys .The picture didn't come out properly  
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 

[Repeater-Builder] Dual battery system

[Kerincom]

Hi again guys .I am looking at installing 2 batteries in a repeater and are
installing 30amp schottky  diodes .
I have 2 80 watt panels feeding a 30 amp schottky bridge (one common to 2
diodes ) then onto 2 solar regulators each supplying a battery 
 
Panels -bridge  regulator- battery--bridge
--lvdrepeater
  
+--regulator--battery--+ 
 
Then using another bridge to combine the batteries together to a low voltage
disconnect to the maxon repeater 
Anyone have any suggestions on heat sinks or problems I might come across
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
 
 
 

RE: [Repeater-Builder] Re: Dual battery system

[Kerincom]

Hey guys .with these diodes where do you connect your lvd is it before or
after the diodes .If it is before the diodes you would require 2 lvd's .one
for each battery.If after then you would need a adjustable lvd to set the
cutout voltage?
.I gather with the 2 batteries  connected this way that the batteries drain
evenly as if they were hooked together but don't have the problems .
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Eric Lemmon
Date: 3/08/2008 10:55:50 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Dual battery system
 
Mike,

I have standardized on one part, the 122NQ030R made by International
Rectifier / Vishay. The datasheet is here:

This Schottky diode has an extremely low forward voltage drop, and it can
handle 120 amperes. I generally use the "R" suffix version, where the
mounting foot is the anode and the 1/4-20 screw is the cathode. I mount the
diode on a short piece of copper bar, which is then bolted to the positive
terminal of the power supply. This allows me to float the battery on an
Astron power supply, but prevents backfeed if the AC power fails. Digi-Key
sells this item for about $24 apiece.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Mike Dietrich
Sent: Saturday, August 02, 2008 3:18 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Dual battery system

any idea of a part number for this type schotky diode for this purpose?

mike


 
 

Re: [Repeater-Builder] Re: Dual battery system

[Kerincom]

The first part .I felt that having separate batteries removes any problems
with pairing batteries in parrel
I am currently chasing a simple lvd diagram 
The batteries are n120 800 cca 230ah but are not all the same on different
site .The solar panels are normally new 80 watt .
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: skipp025
Date: 2/08/2008 12:58:23 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Dual battery system
 
Hello back, 

To you... 
What is the difference if the current draw pulls down both 
batteries as a paralleled pair versus individual single 
battery sources switching back and forth? 

Do you have a low voltage disconnect in either path to 
the equipment? 

Are the batteries the same age, size and type? 

Are the solar panels the same age, size and type? 

s. 

> "Kerincom" <[EMAIL PROTECTED]> wrote:
>
> Two 80 watt panels parallel supplying the two regulators which then
charge
> the 2 batteries separately .The idea I am working with is not to use
the two
> batteries in parallel in case one goes flat and takes the second out
but to
> either with the first part to reduce the current draw on 
> The batteries by separating the TX and rx power sources or to have a
main
> and backup battery incase the main goes flat 
> Thank You,
> Ian Wells,
> Kerinvale Comaudio,
> 361 Camboon Road.Biloela.4715
> Phone 0749922574 or 0409159932
> www.kerinvalecomaudio.com.au
> 
> ---Original Message---
> 
> From: skipp025
> Date: 2/08/2008 12:18:39 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: Dual battery system
> 
> Hi Ian, 
> 
> The first questions I would want to ask you are ...
> 
> Are you supplying the charging energy to each charge controller 
> from the same or different solar arrays? 
> 
> Why the two solar chargers versus one solar charger? Is your 
> array made of mixed type/capacity panels? 
> 
> skipp 
> 
> > "Kerincom"  wrote:
> >
> > Hi guys .I am wondering if anyone knows of good pages on dual
batteries
> > systems and comments on which of following questions is better 
> > 
> > I am wondering if having two batteries .one for the receiver and one
> for the
> > TX each with its own solar regulator or 
> > A system where two batteries are charged by two separate regulators
> and the
> > TX and rx run off one battery and when extended no solar period
> happens the
> > repeater is switched to the second battery when the main drains
> below 10 or
> > 11v and returned to the main when it charges back up
> > 
> > Thank You,
> > Ian Wells,
> > Kerinvale Comaudio,
> > 361 Camboon Road.Biloela.4715
> > Phone 0749922574 or 0409159932
> > www.kerinvalecomaudio.com.au
> >
>


 
 

Re: [Repeater-Builder] Re: Dual battery system

[Kerincom]

Two 80 watt panels parallel supplying the two regulators which then charge
the 2 batteries separately .The idea I am working with is not to use the two
batteries in parallel in case one goes flat and takes the second out but to
either with the first part to reduce the current draw on 
The batteries by separating the TX and rx power sources or to have a main
and backup battery incase the main goes flat 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: skipp025
Date: 2/08/2008 12:18:39 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Dual battery system
 
Hi Ian, 

The first questions I would want to ask you are ...

Are you supplying the charging energy to each charge controller 
from the same or different solar arrays? 

Why the two solar chargers versus one solar charger? Is your 
array made of mixed type/capacity panels? 

skipp 

> "Kerincom" <[EMAIL PROTECTED]> wrote:
>
> Hi guys .I am wondering if anyone knows of good pages on dual batteries
> systems and comments on which of following questions is better 
> 
> I am wondering if having two batteries .one for the receiver and one
for the
> TX each with its own solar regulator or 
> A system where two batteries are charged by two separate regulators
and the
> TX and rx run off one battery and when extended no solar period
happens the
> repeater is switched to the second battery when the main drains
below 10 or
> 11v and returned to the main when it charges back up
> 
> Thank You,
> Ian Wells,
> Kerinvale Comaudio,
> 361 Camboon Road.Biloela.4715
> Phone 0749922574 or 0409159932
> www.kerinvalecomaudio.com.au
>


 
 

[Repeater-Builder] Dual battery system

[Kerincom]

Hi guys .I am wondering if anyone knows of good pages on dual batteries
systems and comments on which of following questions is better 
 
I am wondering if having two batteries .one for the receiver and one for the
TX each with its own solar regulator or 
A system where two batteries are charged by two separate regulators and the
TX and rx run off one battery and when extended no solar period happens the
repeater is switched to the second battery when the main drains below 10 or
11v and returned to the main when it charges back up
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
 
 
 

Re: [Repeater-Builder] New Repeater Desense Problems

[Kerincom]

Replace the lmr400 with heliax .we hjave had nothing but problems with it 
since changing it to heliax the problem has been cleared up 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Bill Wilson
Date: 8/07/2008 10:08:00 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] New Repeater Desense Problems
 
Greetings Group,

I had hoped to be able to purchase off-the-shelf components for a 2 
meter repeater for our local club to use. 

I purchased a Maggoire HiPro R1VHF35, 35 watt version, and with their 
recommendation a set of FiPlex DVN-1533L Duplexers (6 cans). These 
were installed with LMR-400 cabling and a 50 foot run to a Diamond X-
50 Dual Band vertical installed about 40 feet above ground. We have 
a good ground, and the equipment is mounted in an open rack.

The controller is a CAT-250, currently with COR receive only, 
although the CTCSS module is installed but not turned on at this 
time. I have been told however that the PL is being transmitted on 
the transmit signal for decode. I also had the Narrow Band IF Filter 
installed.

Ever since we first hooked everything up, we have had receive desense 
problems. The cans have been retuned 3 times by two different radio 
shops in the area, and the problem still exists. With the exception 
of the duplexer and repeater itself, every other component in the 
system has been swapped out at least once.

One observation by the first radio tech (ham) that came out was 
the "very sensitive" receiver on the order of 0.10 uv, versus the 
0.20 uv as advertised. On the third tune-up of the duplexers, 
they "discovered" that the loops were 180 degrees out of phase, and 
when they turned them, the duplexers "came right in". However, the 
problem persists. Great for in town use, but that's about it.

We have used varied lengths of cables between the repeater and the 
duplexers, without any significant change in results. Next weekend, 
I am planning on looking at the tuning myself with borrowed test 
equipment. I know what I'm looking for pretty much, and it's got to 
be close to correct to work as it does.

Any thoughts ideas, etc., would be appreciated. 

Bill – KJ4EX


 
 

[Repeater-Builder] Crystal Frequency drift

[Kerincom]

Hi guys .I have a TX 815 Philips repeater and it seems to drift off 
frequency from time to time .Has anyone had experience with these repeater s
drifting and any suggestions on how to reduce it 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
 _,_._,___ 
 

Re: [Repeater-Builder] ct systems 3000b service monitor manual?

[Kerincom]

You could try the wavetec service monitor group 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Paul Holm
Date: 6/06/2008 6:40:36 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] ct systems 3000b service monitor manual?
 
Is there a reply in there?

- Original Message - 
From: "Joe" <[EMAIL PROTECTED]>
To: 
Sent: Thursday, June 05, 2008 3:28 PM
Subject: Re: [Repeater-Builder] ct systems 3000b service monitor manual?

> kreick63 wrote:
>> hey folks~
>>
>> i picked up a defective ct-3000b service monitor at Dayton, and was
>> supposed to get the manual sent to me, but alas, my emails are going
>> unreplied to... so im thinking the manual isnt coming.
>>
>> I have picked up an instruction manual odd ebay, but i have heard that
>> it does not cover alignment procedures would anyone have this
>> manual with the added chapter on alignment that i can glean the info
>> from (i.e.copy)
>>
>>
>> tnx
>>
>>
>> joe k8icv
>>
>>
>> 
>>
>>
>>
>> Yahoo! Groups Links
>>
>>
>>
>>
>> 
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 

 
 

RE: [Repeater-Builder] MHW710-3

[Kerincom]

Thanks Eric .Its used in a Philips tx815 w band which we use for commercial
land/mobile use here . .I am currently trying to locate a tx815u band to
suit my latest frequencies 454 and 463 mhz .I have tried one of the
suggested stockist but are still looking to locate suppliers.
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Eric Lemmon
Date: 15/04/2008 10:52:48 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] MHW710-3
 
Ian,

The Motorola MHW710-3 is not common here in the US, because the -3 indicates
470-512 MHz operation. The -1 version is for 400-440 MHz, and the -2
version is for 440-470 MHz. My limited experience with this 13-watt PA
module is that operation outside of its specified band split is not a good
idea. The datasheet can be downloaded here:

When the above page is reached, click on the underlined link "DataSheet
View" on the right side of the page. I have seen the MHW710-3 listed by a
number of so-called "parts brokers" but you may need to purchase a minimum
quantity. I do know that RF Parts does stock the -2 version, but I assume
your application requires operation above 470 MHz. The MHW710 module has
some unique features, and devices from other manufacturers may not be
available.

73, Eric Lemmon WB6FLY

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Kerincom
Sent: Sunday, April 13, 2008 10:36 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Mhw710-3

Hi to everyone.Would anyone have the above IC for sale or know where we can
purchase it

Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au <http://www.kerinvalecomaudio.com.au/>


 
 

[Repeater-Builder] Mhw710-3

[Kerincom]

Hi to everyone.Would anyone have the above IC for sale or know where we can
purchase it
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 

Re: [Repeater-Builder] Unidenified diplexer

[Kerincom]

Thanks  
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Bryon Jeffers KØBSJ
Date: 8/04/2008 10:05:59 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Unidenified diplexer
 
These are the Motorola T1500 series duplexer.

Go here:<http://www.repeater-builder.com/motorola/t1500.html> for more 
info

Bryon Jeffers KØBSJ




Kerincom wrote:
>  
> Can anyone identify this cavity.only details are pass freq is
> 489.475 & reject is 484.275.
> Thank You,
> Ian Wells,
> Kerinvale Comaudio,
> 361 Camboon Road.Biloela.4715
> Phone 0749922574 or 0409159932
> www.kerinvalecomaudio.com.au <http://www.kerinvalecomaudio.com.au/>
>  
>
> 
> 
>
> 
> 
>
> 
>
> No virus found in this incoming message.
> Checked by AVG. 
> Version: 7.5.519 / Virus Database: 269.22.8/1363 - Release Date: 4/7/2008
8:56 AM
>
 

[Repeater-Builder] Unidenified diplexer

[Kerincom]

 
Can anyone identify this cavity.only details are pass freq is 
489.475 & reject is 484.275.
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Phone 0749922574 or 0409159932
www.kerinvalecomaudio.com.au
 <>

[Repeater-Builder] fm815

[Kerincom]

Would anyone have a Philips TX and rx 815 u band repeater for sale
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
www.kerinvalecomaudio.com.au
 
 
 
 

Re: [Repeater-Builder] Linking two shared repeaters

[Kerincom]

Each of my repeaters operate on different frequencies .e.g. Repeater #1 rx
483.9mhz and TX on 489.1mhz 5.2 meg split.
#2 may be on rx 490mhz and TX on 495.2mhz 
Correction my #2 repeater link receiver is tuned to #1 output frequency (489
1mhz) .and transmitt on the #1 input frequency (483.9mhz).
Yes each on my clients on the private have a separate ctcss frequency
assigned to their radios for TX and rx so they can only hear their own cars.
 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Jim Brown
Date: 5/01/2008 12:36:06 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Linking two shared repeaters
 
I think I understand what you are saying Ian. Your 
#2 repeater has it's input frequency on the #1
repeater's output frequency. That way you would only
require one extra receiver (on a third frequency) and
precedence circuit at the #1 repeater site. The #2
site would have to have it's output on the third
frequency to make it all work.

I think you have simplified the system down to the
minimum required hardware to make it work. CTCSS
Transmitted only while an input is present would round
out the system requirement. Your multi-user CTCSS
controllers should keep things private as different
users use the different tones.

Sometimes thinking outside the box can make for a real
worthwhile reduction in hardware.

73- Jim W5ZIT

--- Kerincom <[EMAIL PROTECTED]> wrote:

> Hi again Jim
> With your thinking below .My remote private site
> should work in the same
> sort of way as what you are suggesting except while
> s2 has a signal on it 
> it sends this signal to both s2 users and back to s1
> repeater at the same
> time.In return the signal works the same as your
> first 3-5 lines below.I
> only require one link radio on the remote sites and
> not one at each end of
> the link .However with our open we have a separate
> link repeater paired with
> the s1 (explained better in my response to skip) so
> the link system works at
> the same time as the central site repeater.In the
> open system we don't link
> the TX frequencies directly from site to site
> .I.e.(s1tx to s2rx)(s2tx to
> s1rx) due to a error in frequency allocation,which
> will be fixed and which
> we expect to link directly with our private system
> as we wont get the sites
> frequencies licensed so close together next time
> 
> Thank You,
> Ian Wells,
> Kerinvale Comaudio,
> 361 Camboon Road.Biloela.4715
> www.kerinvalecomaudio.com.au
> 
> ---Original Message---
> 
> From: Jim Brown
> Date: 4/01/2008 8:25:48 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Linking two shared
> repeaters
> 
> Ian, here is my thinking. When site 1 has a signal
> on
> the repeater input, the signal from site 2 is
> blocked
> because of the circuit that gives precedence to the
> local site repeater receiver. When a site 1 user
> unkeys, there will be no CTCSS tone coming back from
> site 2 to key the site 1 repeater. The combination
> of
> the precedence circuit and CTCSS requirement for
> both
> repeaters keeps the system from locking up. The same
> circuit would be required between the receivers at
> site 2 as in site 1. And both repeaters would have
> to
> be configured to only transmit a CTCSS tone when a
> user keys the input, not during the squelch tail.
> 
> 73 - Jim W5ZIT
> 
> --- Kerincom <[EMAIL PROTECTED]> wrote:
> 
> > I will have a look at the circuit and see .The
> > problem we found with link
> > setup 1 upper design is we could not have one link
> > radio on one site and one
> > on another site as when the site 2 link stops
> > transmitting and rx site 1
> > tail retrips site 2 and keeps them on .Another
> > problem was while s1 link in
> > transmitting s2 receiver is trying to pick up the
> > incoming signal and s1
> > link transmission at the same time .

__
Never miss a thing. Make Yahoo your home page. 
http://www.yahoo.com/r/hs

 
 

Re: [Repeater-Builder] Linking two shared repeaters

[Kerincom]

Hi again Jim
With your thinking  below .My remote private site should  work in the same
sort of way  as what you are suggesting except while s2 has a signal on it 
it sends this signal to both s2 users and back to s1 repeater at the same
time.In return the signal works the same as your first 3-5 lines below.I
only require one link radio on the remote sites and not one at each end of
the link .However with our open we have a separate link repeater paired with
the s1 (explained better in my response to skip) so the link system works at
the same time as the central site repeater.In the open system we don't link
the TX frequencies directly from site to site .I.e.(s1tx to s2rx)(s2tx to
s1rx) due to a error in frequency allocation,which will be fixed and which
we expect to link directly with our private system as we wont get the sites
frequencies licensed so close together next time
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Jim Brown
Date: 4/01/2008 8:25:48 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Linking two shared repeaters
 
Ian, here is my thinking. When site 1 has a signal on
the repeater input, the signal from site 2 is blocked
because of the circuit that gives precedence to the
local site repeater receiver. When a site 1 user
unkeys, there will be no CTCSS tone coming back from
site 2 to key the site 1 repeater. The combination of
the precedence circuit and CTCSS requirement for both
repeaters keeps the system from locking up. The same
circuit would be required between the receivers at
site 2 as in site 1. And both repeaters would have to
be configured to only transmit a CTCSS tone when a
user keys the input, not during the squelch tail.

73 - Jim W5ZIT

--- Kerincom <[EMAIL PROTECTED]> wrote:

> I will have a look at the circuit and see .The
> problem we found with link
> setup 1 upper design is we could not have one link
> radio on one site and one
> on another site as when the site 2 link stops
> transmitting and rx site 1
> tail retrips site 2 and keeps them on .Another
> problem was while s1 link in
> transmitting s2 receiver is trying to pick up the
> incoming signal and s1
> link transmission at the same time .

__
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/
_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ 


 
 

Re: [Repeater-Builder] Re: Linking two shared repeaters

[Kerincom]

The band we are using is the 450-500mhz band even  though some of our sites
are .2 meg from each other The link system is 3-10 meg different from the
central station e.g. 
Central is 473.575 ,S1 is 473.200,S3 is 473.475,S4 is 474.150,S5 is 470.450
and the link radios are 487.025 giving up to 8-10 meg seperation  from link
to repeaters .With our open we ran into problems with seperation linking the
sites that is why we setup a second repeater on the central site and paired
them i.e. 473.575 and 487.025 and that allows the other sites to be linked
all using 487.025.
We had 3 of the licences in place before we realized the error and then had
to improvise
With the private system we are at 483.900 and 489.1mhz and expect to setup
our private remote sites with more than 3 meg away from 489.1 which means we
don't require the second link repeater on the central site which should
simply things 
I haven't had any experience with audio delays but what we do is we advise
the clients to hold their TX down for a second or so and then speak and that
overcomes the first words from being chopped off through the other sites .If
they follow that rule we can hear everyone perfectly. 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: skipp025
Date: 5/01/2008 7:31:41 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Linking two shared repeaters
 
> "Kerincom" <[EMAIL PROTECTED]> wrote:
> Thanks skipp.
> I was looking at only linking two repeaters together but if I 
> can successfully link two or more with no problems then it 
> would be great to expand our private system to allow my clients 
> even more coverage as long as privacy can be maintained.

My first post was the more practical way to link two sights using 
one half duplex link radio. 

> With our current private repeater we use a tp-163 panel with 
> two maxon pm150 and we hope to use the same or a tp-154 on 
> our second site.

I have many of both in operation... although I'm a bigger fan of 
the TP-163 tone panel. 

> I think in the end of your email the two radios back to back .
> We tried having two radios b2b at a separate site in between 
> the two sites we wanted to link and yes it worked ok but we 
> ran into a) desence if the power output was to high on either 
> radio and we were using 6-10db yagis aimed at each site to 
> give us seperation but we still ran into problems .I think the 
> max power output was around 150mw before problems started . 

In band linking can be tricky. Space the frequencies as far as 
possible. I use a generous amount of filtering on the repeater and 
the link radio. 

> B)bad time delays up to a second or so because each radio had 
> to turn on in time .

One trick is to place audio delays in the proper places to allow 
the links to power up before the content is passed. 

> With our current system we have no delays to complain about.
> It doesn't matter which site someone talks on, each of the 
> other repeater sites turns on at the same time. 

I'm also doing the same... 

> I do have one site that carn't communicate very well with 
> the central station and is linked to one of the other sites 

You can have more than one central linking chain station. 

> and yes we do have a 1- 2 second delay on it which we hope 
> to clear that up soon and get it to work direct with the 
> central station.

The previously mentioned audio delays properly placed might fix 
the problem without all the extra work... just the expense of the 
delay boards and the time to install them. 

> With the link reception from the central station we have found 
> that we require all the remote sites to have their frequencies 
> to be more than 3 meg away as desence can occur on receiving 
> the signal from the central station if it is weak and we have 
> tried a old diplexer inline with yagi and the link radio to 
> notch the remote sites transmitter so the link radio
> receives the central site with no desence which works 
> Perfectly. 

Am doing same... I don't remember you saying which band you were 
operating and linking with... but I've done about every possible 
combination and we're always happy to share the details. The in-band 
linking and repeater requires proper filtering and frequency 
spacing to work... but it can and does work well. 

> Thank You,
> Ian Wells,
> Kerinvale Comaudio,
> 361 Camboon Road.Biloela.4715
> www.kerinvalecomaudio.com.au

Cheers Ian, 
s. 


 
 

Re: [Repeater-Builder] Re: Linking two shared repeaters

[Kerincom]

Thanks skip.
I was looking at only linking two repeaters together but if I can
successfully link two or more with no problems then it would be great to
expand our private system to allow my clients even more coverage as long as
privacy can be maintained.
With our current  private repeater we use a tp-163 panel with two maxon
pm150 and we hope to use the same or a tp-154 on our second site.
With the second site link radio we might try a maxon data radio which we use
on our open sites with no problems other wise we will use a maxon pm150
there too and just setup a relay control on site 2 to switch between s2
receiver and the link receiver when s1 is active.With s2 link transmission
we should be able to connect it in side by side with s2 transmitter so what
goes over s2 TX goes over the link back to s1.
I think in the end of your email the two radios back to back .We tried
having two radios b2b at a  separate site in between the two sites we wanted
to link and yes it worked ok but we ran into a) desence if the power output
was to high on either radio and we were using 6-10db yagis aimed at each
site to give us seperation but we still ran into problems .I think the max
power output was around 150mw before problems started . B)bad time delays up
to a second or so because each radio had to turn on in time .
With our current system we have no delays to complain about .It doesn't
matter which site someone talks on, each of the other repeater sites turns
on at the same time.
I do have one site that carn't communicate very well with the central
station and is linked to one of the other sites and yes we do have a 1- 2
second delay on it which we hope to clear that up soon and get it to work
direct with the central station.
With the link reception from the central station we have found that we
require all the  remote sites to have their frequencies to be more than 3
meg away as desence can occur on receiving the signal from the central
station  if it is weak and we have tried a old diplexer inline with yagi and
the link radio to notch the remote sites transmitter so the link radio
receives the central site with no desence which works 
Perfectly. 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: skipp025
Date: 5/01/2008 5:22:11 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Linking two shared repeaters
 
Regarding what you want to do... there are two basic forms 
of linking... the type you're trying to do with more than two 
repeater sites/systems is often called "chain linking" where 
the center repeater site/station/location passes the 
communications onward to a third and fourth distant locations. 
You'll notice my first reply post was specific to mention a 
two site layout. 

Two ways to make up the multi site system you're asking about. 

The first and best way to go is to find some type of a repeater 
controller that supports chain linking. The link radios I described 
in my original example simply connect to the repeater controller 
and the rest is done with programming. 

You can also buy the RLS/RBS-1000 board from CAT Auto if it 
supports chain linking. You'll have to ask them... it's a uP 
driven board so the firmware can be updated/modified to be 
a chain or hub operation. How practical that is to get done is 
another story. 

One rude and un-practical way to complete a multi-site linking 
system is to use the two-site system layout I described earlier 
at each end site of the system. Mid system located Repeaters with 
more than one path in and out chain function simply have two back-
to-back connected radios for each link path. One of the b2b radios 
is programmed up to a distant repeater link frequency pair and 
the other onto the main repeater channel. 

You would need one pair of back-to-back radios for each remote 
repeater site you wish to include into the system. 

Yeah all things considered it does work pretty well for what 
it is. 

cheers, 
s. 

> "Kerincom" <[EMAIL PROTECTED]> wrote:
> I will have a look at the circuit and see .The problem we found 
> with link setup 1 upper design is we could not have one link 
> radio on one site and one on another site as when the site 2 
> link stops transmitting and rx site 1 tail retrips site 2 and 
> keeps them on .Another problem was while s1 link in
> transmitting s2 receiver is trying to pick up the incoming signal and s1
> link transmission at the same time .
> With link setup 2 while link 2 is transmitting it carn't receive and
when it
> switches back to rx and receives a signal from site 1 the only
place that
> signal goes is to s2 transmitter.Our 5 open repeaters are all linked
this
> way and the sites only transmit when a user activates one of them .We
> experience no delays and the users find it unreal .Each repeater is
ctcs

Re: [Repeater-Builder] Linking two shared repeaters

[Kerincom]

Thanks Jim .The main idea is that our business clients can have some extra
range and also retain privacy so other users that share it carn't hear the
other businesses on the channel.We only currently have 3 businesses that
share the 1st site each with their own ctcss tones.With your second
paragraph we found that having a separate link radio at each end could
possibly  cause continous linking of the sites and lock the repeaters
together in transmission  .With our open uhf network we have 5 separate
repeaters  each on different frequencies and all are linked back to our
central site using only 1 link radio per remote site so everything that goes
over any one of the sites can be heard by all users over the other 5 sites
so our farmers can move freely from one area to another and still maintain
communications with their other mobiles.Currently I think we cover close to
2000kms in total area We found setting these sites up that we can install
one link radio at the remote sites with the transmitt frequency the same as
the central site receive and the link receiver the same frequency as the
central site transmitt frequency.Then the link radio acts as a mobile radio
with a beam which is aimed towards the central site. 
With the tone panel on site 2 it  will decode the ctcss when a user uses it
and then repeat users tone over the site 2 TX frequency and also site1 rx
input frequency .The only thing I have to make sure of is when someone uses
site 1the site 2 receiver is disconnected and the ctcss/audio in site 2  is
received on the link receiver only  and then is fed into the tone panel to
decode the users tone and then transferred to site 2 transmitter only  and
not to the link transmitter otherwise the link radio will switch to TX and
block the incoming signal from site 1
With our other open network it is really simple when someone users the
central site the link receiver on the outer sites  transfers the audio
direct to the remotes sites transmitter and then switches back to the remote
sites receiver.
The only difference between the open and our private/shared system is that
the private system users a tone control panel to control the repeaters and
since the tone control panels only work with valid ctcss tones the whole
system should maintain privacy over each site and between the sites (over
the link)
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Jim Brown
Date: 3/01/2008 4:02:13 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Linking two shared repeaters
 
Ian, our ham club has talked about putting one of
their repeaters on a different frequency and linking
them together. We operate both on the same frequency
now, one at a time with separate tones.

My proposal to them was to put a receiver at each site
for the other repeater and in-band link them. I think
that is what you are proposing to do also, except you
would use a separate transmitter to do the in-band
link. Using a separate transmitter in your case may
be more easily accomplished since you can use the same
receiver CTCSS tone and transmit audio to both your
repeater transmitter and link transmitter. Using a
separate receiver as I proposed to our club would be
easy for our single CTCSS system with each receiver
feeding the controller input through a circuit which
gives priority to the local repeater receiver. 

In your case, you could put your link transmitter on a
separate beam pointed at the other site and let the
normal tone controller take care of the other
repeater. The only thing I would suggest is that you
configure your controllers to only transmit the CTCSS
while a user is key down, and not during any ID or
squelch tail. With a decent link, you would have full
interoperability with both systems, and no key up
delays due to the other station being on the other
repeater.

I have not run across a two repeater system linked in
this manner, but it does seem to be the easiest way to
get the same audio on both repeaters. In your case,
that may be a slight detrement since users on the
second repeater would be prevented from using the
repeater when the first repeater was busy. Using the
receiver link I proposed would allow a station to use
the second repeater by overriding the audio from the
first repeater by simply keying the second repeater
input.

73 - Jim W5ZIT

--- Kerincom <[EMAIL PROTECTED]> wrote:

> Hi guys .I have one shared uhf commercial repeater
> using a tp-163 panel and
> I am going to install another repeater on different
> frequencies 50kms away
> and are looking at installing a tp-163 ctcss panel
> to it but also looking
> for a easy way to link the two repeaters together
> allowing clients on one
> site to be able to use the same tone on both
> repeaters just by changing
> channel and still maintain the privacy on both sites
> .
> One option I came up with wa

[Repeater-Builder] Linking two shared repeaters

[Kerincom]

Hi guys .I have one shared uhf commercial repeater using a tp-163 panel and
I am going to install another repeater on different frequencies 50kms away
and are looking at installing a tp-163 ctcss panel to it but also looking
for a easy way to link the two repeaters together allowing clients on one
site to be able to use the same tone on both repeaters just by changing
channel and still maintain the privacy on both sites .
One option I came up with was on the 2nd site when someone uses it the panel
detects their tone and feeds site 2 audio/ctcss to the site2 transmitter and
also a link radio to send it at the same time to site 1.When someone uses
site1 ,a ctcss/audio signal is received by the link receiver which 
disconnects the link transmitter and also site2 receiver and the link rx
ctcss/audio is then fed into the tone panel to decode and then is fed to
site 2 transmitter . 
Link radio transmitter feeds  site 1 rx frequency input
Link radio receiver receives site 1 TX frequency output.
Does  anyone have any further suggestions or  know of web pages detailing
linking two or more shared repeaters
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
www.kerinvalecomaudio.com.au
 

Re: [Repeater-Builder] Manuals for the Wavetek/Schlumberger SI 4040 Stabilock

[Kerincom]

Try the wavtektestequipment group  on yahoo .they should be able to help you

 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: n7mfy
Date: 18/12/2007 6:01:43 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Manuals for the Wavetek/Schlumberger SI 4040
Stabilock
 
I am looking for manuals for the Wavetek/Schlumberger SI 4040 
Stabilock. I have the one that features a memory card. I am also 
looking for the stabitexter, and the radiocode analyzer 4922 or 4923


 
 

[Repeater-Builder] 6ld450s tuning instructions

[Kerincom]

Hi guys .Would anyone have the tuning instructions for the above diplexer
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au
 

[Repeater-Builder] Sigtec 11-03 and 11-07

[Kerincom]

Would anyone have any information guides on the above ctcss
encoders/decoders
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au
 
 
 
 

[Repeater-Builder] 815

[Kerincom]

Hi guys .I have a rx815 receiver with faulty reception .Sometimes it is 
Clear and strong and other times very weak reception 9only from local 
Stations) .It could be a problem with alignment but I did the alignment 
By book and when tested on the wavetek test unit it receives -110db no 
Worries .The squelch isn't staying stable because it stays quite most 
Of the time and then sometimes it opens up after a received signal with 
Mute noise .Thanks Ian 

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

Re: [Repeater-Builder] Re: Cleaning of duplexers...pt 2

[Kerincom]

We had a VHF 70mhz once have other frequencies coming through and on
inspection we found a small area of corrosion in one tin at the base plate 
once cleaned all ok again .
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Jesse Lloyd
Date: 3/09/2007 7:17:56 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Cleaning of duplexers...pt 2
 
I agree skipp, just lube it up and use it... unless it was buried in a pile
of sand I cant see many benefits to cleaning it, other than getting familiar
with the inside of a duplexer.  Generally I don't ever open duplexers, a
pain in the neck to take a part and way to easy to mess up putting them back
together.  The only time I had to do that was on a sinclair one when I
dropped the rod into the can...oops.

Jesse



On 9/2/07, skipp025 <[EMAIL PROTECTED]> wrote: 
Why is everyone so crazy to clean the inside of Motorola 
T-1500 duplexer bottle body with cleaners? 

Unless there is some pitting on the plunger body... you need only 
blow out the dust, put a little tiny bit of lube (I use dry silicon, 
teflon, or Amsoil MP) on the threaded shaft and slowly spin the 
plunger up and down through its range a few times. 

The finger stock is set up by design to polish the plunger body 
as it goes up and down. 

Silly people use the wrong type of wire wheel to scratch and embed 
metal into the plunger body. I've never found a need to use sand 
paper... 

s. 

> "georgiaskywarn" <[EMAIL PROTECTED]> wrote:
> Had an experience with using "TarnX" in cleaning some Moto cans. Had a 
> friend of mine that used this with great success. I used it...had 
> issues. The difference is he used "running water" when I used a "pan 
> of water". Didn't clean off very well...so corrosion came on even 
> faster because the "Murratic Acid" (sp?) didn't clean off very well.
> 
> Got to thinking (because I have to do this again), why not just 
> use "Murratic Acid" which is used in pool cleaning products. A gallon 
> of this...deluted...is MUCH cheaper than the "smallish" bottles 
> of "TarnX".
> 
> Anybody use this before??? 
> 73
> Robert
>




 
 

[Repeater-Builder] Plessey MTR7000

[Kerincom]

Would anyone know where I can get a copy of the service/alignment manual for
the above radio
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au
 
 
 
 

RE: [Repeater-Builder] Re: Would You..... tower height question

[Kerincom]

That would be a pain .Our towers here in rual Australia have to be 50 meters
before a light needs to be installed .I don't know if the rule is different
in and near the city areas. One day I might have to find out .
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Eric Lemmon
Date: 18/06/2007 7:52:45 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Would You. tower height question
 
Generally, 200 feet is the limit for unlighted towers. Any structure that
extends more than 200 feet above ground level will require an Aeronautical
Study to determine if it is a hazard to air navigation. However, there are
instances where a shorter structure poses a hazard, possibly due to its
proximity to an airport or to a traffic pattern. In my case, the FAA ruled
that obstruction lighting (but not painting) was required on a 180-foot tall
rocket launch gantry on the military base where I work, due to the
likelihood that helicopters would be flying in that area prior to a launch.

The FAA has published an Advisory Circular, AC-70/7460-1K, dated February
2007, which is available here:

http://tinyurl.com/2odbez

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of texasexpediter
Sent: Sunday, June 17, 2007 7:04 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Would You. tower height question

What is the maximum height a tower can be without falling under all
the lighting, painting etc. regulations?


 
 

RE:[Repeater-Builder] Best batteries for repeater sites

[Kerincom]

The setup I have is 2 uhf 50 watt repeaters with a 25 watt Philips repeater
on two optima batteries with regulator charged by a 200 watt wind generator
and 4 80 watt panels .However I will be seperating 1 50 watt repeater off
onto its own battery system as soon as we can get to the site to reduce the
load on the other bank .But I am finding the yellow tops don't have the
reserve that the ordinary lead acid batteries for dozers 1000ah have. 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Eric Lemmon
Date: 7/06/2007 2:08:31 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE:[Repeater-Builder] Best batteries for repeater sites
 
Ian,

The best type of battery for backup repeater power is, in my opinion, a
valve-regulated, sealed lead-acid battery using absorptive glass mat design.
In the solar-power industry, this battery is described as a "VRSLA-AGM"
battery.

When floated on the appropriate solar, wind, or utility power supply with
the appropriate charge controller, such batteries can provide reliable
backup power. I use the term "appropriate" for good reason; most of the
battery systems that have failed in my area did so because inappropriate
batteries (automotive wet cell) were used, or because the float voltage was
incorrect or poorly regulated. My 35 watt solar-powered mountaintop UHF
repeater has been in service for 4.5 years with 100% availability, using two
75 watt solar panels, a SunWize SIGMA charge controller, and two 105 AH
Concorde VRSLA-AGM batteries. Very simple and very reliable.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Kerincom
Sent: Wednesday, June 06, 2007 8:05 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Norton AntiSpam] [Repeater-Builder] Best batteries for repeater
sites

Hi guys. Can anyone suggest the best type of batteries for repeater sites?
It seems our ordinary lead acid batteries are surviving better than optima
yellow tops over 2-3 days of rainy weather. Would anyone have any other
sugestions?

Thank You,
Ian Wells,
Kerinvale Comaudio


 
 

[Repeater-Builder] Best batteries for repeater sites

[Kerincom]

Hi guys .Can anyone suggest the best type of batteries for repeater sites 
It seems our ordinary lead acid batteries are surviving better than optima
yellow tops  over 2-3 days of rainy weather.would anyone have any other
sugestions
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au
 
 
 
 

[Repeater-Builder] Coax length between the TX and diplexer

[Kerincom]

Hi guys .I have been wondering and trying to find out the correct length of
coax between the diplexer and the tx.and rx and someone has brought it up on
another group.here is a snipit 
Is the length between the exciter -pa-TX on duplexer a quarter wavelength or
multiple there of. Is the rx-preamp(Is the rx-preamp(if used)-rx input of
duplexer the same number of wave lengths as the TX path
So hopefully this will help answer the above enquiry. 
Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au
 

[Repeater-Builder] Adding a notch to a uhf cavity tin

[Kerincom]

Hi guys .I am interested in adding a adjustable notch to a 6inch uhf band
pass cavity tin.can anyone suggest any information to the modification
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au
 

Re: [Repeater-Builder] Wavetek 3100 Service Monitor Manual(s)

[Kerincom]

Try the wavetektestequipment yahoo group 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
www.kerinvalecomaudio.com.au
 
---Original Message---
 
From: Eric Brownell
Date: 01/29/07 20:20:17
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Wavetek 3100 Service Monitor Manual(s)
 
Does anyone know where I might find a service manual, schematic, etc. for a
Wavetek 3100 service monitor? I've searched the web to no avail.
 
Eric - W2ZT