Jump to content


Photo
- - - - -

Rebuilding the Chain O' Lakes Repeater - Ingleside IL


  • Please log in to reply
27 replies to this topic

#1 Corey

Corey

    Advanced Member

  • Members
  • PipPipPip
  • 305 posts
  • LocationWisconsin
  • GMRS Callsign:WQVA593
  • Ham Callsign:KD9HCW

Posted 23 January 2016 - 11:32 AM

Due to the duplexer failing I decided over the winter months I would rebuild the Chain O' Lakes repeater in Ingleside IL. I had a spare 100W MTR2000 in the garage and decided this was going to be the heart of the new machine. Tuning it down to 50W would insure a solid 100% duty cycle and provide years of service. Due to past bad experiences with EBay duplexers I decided to purchase a new one and settled on an EMR 4 cavity pass / reject with a factory tune. Being a tinkerer that loves to build things I decided to dig out all the radio junk and see what I could come up with. The finished system will have an on board Bird 43 SWR / power meter and one of those micro mobile UHF radios for testing , monitoring and local use. To limit loss and interference I plumbed the entire system with ΒΌ helix superflex trimmed to critical lengths. Over the past several months I was having issues with another systme on .550 so come spring it will be moving to .725. I am still waiting on a few more items to finish this build and will keep this thread updated.

 

fr.jpg

 

emr.jpg


1710.jpg

 

 

This is the tower at my site, 150' with a DB420 on the top.

 

tower.jpg


  • JohnE, Logan5 and Swords like this

Just My $.02

 

Corey

 

Midwest GMRS

https://mwgmrs.com


#2 JohnE

JohnE

    Advanced Member

  • Members
  • PipPipPip
  • 569 posts
  • Locationthe Empire State

Posted 23 January 2016 - 11:44 AM

nice neat little package.

duplexer plot looks great.

what's the yagi for?


Powered by Kenwood, Motorola, EF Johnson,Cresend  Milcom and Henry


#3 Corey

Corey

    Advanced Member

  • Members
  • PipPipPip
  • 305 posts
  • LocationWisconsin
  • GMRS Callsign:WQVA593
  • Ham Callsign:KD9HCW

Posted 23 January 2016 - 12:48 PM

We used to have 2 repeaters at the site. The Yagi ran a Motorola R100, you could get into it 48 miles away at the house. It has since been taken down and replaced with a side arm and station master running a friends Ham repeater.


Just My $.02

 

Corey

 

Midwest GMRS

https://mwgmrs.com


#4 JohnE

JohnE

    Advanced Member

  • Members
  • PipPipPip
  • 569 posts
  • Locationthe Empire State

Posted 23 January 2016 - 01:06 PM

We used to have 2 repeaters at the site. The Yagi ran a Motorola R100, you could get into it 48 miles away at the house. It has since been taken down and replaced with a side arm and station master running a friends Ham repeater.

wow what a relic.


Powered by Kenwood, Motorola, EF Johnson,Cresend  Milcom and Henry


#5 JohnE

JohnE

    Advanced Member

  • Members
  • PipPipPip
  • 569 posts
  • Locationthe Empire State

Posted 23 January 2016 - 05:34 PM

6U Tripplite case, nice.

used one for a customer wall mounted w/XBR8400 ,small celwave duplexer and 35AHr battery. little tight but it worked.


Powered by Kenwood, Motorola, EF Johnson,Cresend  Milcom and Henry


#6 kb2ztx

kb2ztx

    Advanced Member

  • Members
  • PipPipPip
  • 103 posts
  • LocationEast Coast
  • GMRS Callsign:WQLY948
  • Ham Callsign:KB2ZTX

Posted 24 January 2016 - 08:57 AM

Nice looking equipment. Kudos on the 1/4" for jumpers. What hard line are you running up the tower. Just installed 150' of 1 1/4" on my repeater and amazed at the night and day vs the 1//2" it replaced. 



#7 JohnE

JohnE

    Advanced Member

  • Members
  • PipPipPip
  • 569 posts
  • Locationthe Empire State

Posted 24 January 2016 - 09:08 AM

1/2" has a 1.5 dB loss and 1 1/4 " is .6, big difference at 150'

~2.25 vs ~.9db loss.

nice change


Powered by Kenwood, Motorola, EF Johnson,Cresend  Milcom and Henry


#8 Corey

Corey

    Advanced Member

  • Members
  • PipPipPip
  • 305 posts
  • LocationWisconsin
  • GMRS Callsign:WQVA593
  • Ham Callsign:KD9HCW

Posted 24 January 2016 - 09:21 AM

I have 7/8 on the tower, the run is 160' total, I had a 30W R100 at this site for about 5 months and it was usable 45 miles away.


  • JohnE likes this

Just My $.02

 

Corey

 

Midwest GMRS

https://mwgmrs.com


#9 n4gix

n4gix

    Advanced Member

  • Members
  • PipPipPip
  • 476 posts
  • GMRS Callsign:WQWU626
  • Ham Callsign:N4GIX

Posted 24 January 2016 - 12:00 PM

I wish I had a nice tower for my future repeater. Alas, I'm stuck with a tripod roof mounted antenna at about 42'. It still should be good enough to cover the roughly 10 mile radius I need for now.



#10 quarterwave

quarterwave

    Advanced Member

  • Members
  • PipPipPip
  • 249 posts
  • LocationOh-io
  • GMRS Callsign:On-File

Posted 24 January 2016 - 06:05 PM

Can't beat that MTR for solid performance, I run one with a Zetron and a ASP fiberglass antenna (800 model I think) 22 feet long on my 50 foot tower, which is on a hill 150 feet above average terrain. It has always provided good range. Before the MTR, I had 2 mobiles running, it was good, the MTR is the real deal though. For duplexing I run 2 receive cans, and one transmit can, stuff salvaged out of an old Motorola community repeater. Works great. 


  • JohnE likes this

#11 kb2ztx

kb2ztx

    Advanced Member

  • Members
  • PipPipPip
  • 103 posts
  • LocationEast Coast
  • GMRS Callsign:WQLY948
  • Ham Callsign:KB2ZTX

Posted 24 January 2016 - 07:33 PM

Came across the cable left over from another project and didn't want it to go to waste ! The MTR is a rock solid repeater. Unfortunately mine is a MTR3000 and I'm not a huge fan of it. Have a few Quantars sitting so may swap one in. 



#12 Corey

Corey

    Advanced Member

  • Members
  • PipPipPip
  • 305 posts
  • LocationWisconsin
  • GMRS Callsign:WQVA593
  • Ham Callsign:KD9HCW

Posted 24 January 2016 - 10:52 PM

I finished installing the on board Bird 43 inline SWR / Power meter, getting closer!

 

side.jpg


  • JohnE likes this

Just My $.02

 

Corey

 

Midwest GMRS

https://mwgmrs.com


#13 Corey

Corey

    Advanced Member

  • Members
  • PipPipPip
  • 305 posts
  • LocationWisconsin
  • GMRS Callsign:WQVA593
  • Ham Callsign:KD9HCW

Posted 25 January 2016 - 07:51 PM

Well its done, now to get it tuned, tested and installed.

 

final1.jpg

final2.jpg


  • JohnE likes this

Just My $.02

 

Corey

 

Midwest GMRS

https://mwgmrs.com


#14 ASRM

ASRM

    Advanced Member

  • Members
  • PipPipPip
  • 99 posts
  • GMRS Callsign:WQSW318

Posted 26 January 2016 - 08:33 AM

I wish I had a nice tower for my future repeater. Alas, I'm stuck with a tripod roof mounted antenna at about 42'. It still should be good enough to cover the roughly 10 mile radius I need for now.

n4gix. don't feel bad, we are doing a similar setup, eave mount at 15' and a 30 foot channel master pipe with a 6dbd/9dbi Comet antenna. We get 15 miles mobile for the most part and we have lots of hills and gullys in the way.

 

If I had that 150 foot monster I would rule the world ;)



#15 n4gix

n4gix

    Advanced Member

  • Members
  • PipPipPip
  • 476 posts
  • GMRS Callsign:WQWU626
  • Ham Callsign:N4GIX

Posted 26 January 2016 - 02:03 PM

If I had that 150 foot monster I would rule the world ;)

Well, your county maybe. That is one fine and professionally built repeater Cory is building! B)


  • Corey likes this

#16 Corey

Corey

    Advanced Member

  • Members
  • PipPipPip
  • 305 posts
  • LocationWisconsin
  • GMRS Callsign:WQVA593
  • Ham Callsign:KD9HCW

Posted 27 January 2016 - 08:51 AM

Well, your county maybe. That is one fine and professionally built repeater Cory is building! B)

Well thanks William, I think it turned out OK. I try do build all my gear as good as I can using the best parts I have on hand of can afford. I am sure the 1/4 helix jumpers are overkill but way better then 90% shielded coax... I know its made a difference on my commercial repeaters so it can hurt the GMRS ones.


Just My $.02

 

Corey

 

Midwest GMRS

https://mwgmrs.com


#17 JohnE

JohnE

    Advanced Member

  • Members
  • PipPipPip
  • 569 posts
  • Locationthe Empire State

Posted 27 January 2016 - 06:10 PM

1/4 " is definitely not overkill. most of the stuff I do uses 1/2" superflex, beats using 213/400 cables.


Powered by Kenwood, Motorola, EF Johnson,Cresend  Milcom and Henry


#18 Corey

Corey

    Advanced Member

  • Members
  • PipPipPip
  • 305 posts
  • LocationWisconsin
  • GMRS Callsign:WQVA593
  • Ham Callsign:KD9HCW

Posted 27 January 2016 - 08:13 PM

1/4 " is definitely not overkill. most of the stuff I do uses 1/2" superflex, beats  using 213/400 cables.

 

I used some 1/2 on the amplifier output on my commercial Mototrbo system but mostly 1/4 for jumpers etc... Pic's included.

 

kr1.jpgkr5.jpgkr6.jpg

 

Second rack to the left of mine is the National Weather Service radio for our area.

 

kr3.jpg

 

Everybody loves an equipment shelter pic!

 

kr4.jpg


Just My $.02

 

Corey

 

Midwest GMRS

https://mwgmrs.com


#19 JohnE

JohnE

    Advanced Member

  • Members
  • PipPipPip
  • 569 posts
  • Locationthe Empire State

Posted 27 January 2016 - 09:59 PM

3" EIA, guess there is some broadcast stuff there. not to mention the battery rack


Powered by Kenwood, Motorola, EF Johnson,Cresend  Milcom and Henry


#20 Corey

Corey

    Advanced Member

  • Members
  • PipPipPip
  • 305 posts
  • LocationWisconsin
  • GMRS Callsign:WQVA593
  • Ham Callsign:KD9HCW

Posted 28 January 2016 - 06:02 AM

Used to be a 10KW TV transmitter at the site, its no longer operational.


Just My $.02

 

Corey

 

Midwest GMRS

https://mwgmrs.com





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users