coryb27

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

I finished installing the on board Bird 43 inline SWR / Power meter, getting closer!
 
http://cor3com.com/mygmrs/side.jpg

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.

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 ¼ 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.
 
http://cor3com.com/mygmrs/fr.jpg
 
http://cor3com.com/mygmrs/emr.jpg


 
 
This is the tower at my site, 150' with a DB420 on the top.
 
http://cor3com.com/mygmrs/tower.jpg

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 ¼ 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.
 
http://cor3com.com/mygmrs/fr.jpg
 
http://cor3com.com/mygmrs/emr.jpg


 
 
This is the tower at my site, 150' with a DB420 on the top.
 
http://cor3com.com/mygmrs/tower.jpg

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 ¼ 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.
 
http://cor3com.com/mygmrs/fr.jpg
 
http://cor3com.com/mygmrs/emr.jpg


 
 
This is the tower at my site, 150' with a DB420 on the top.
 
http://cor3com.com/mygmrs/tower.jpg

Find out if you have a local Tower Company that has a few sites. I was able to get on a local owned comerical tower combined system with 20 other users (mostly trunking) for $45 a month. The system his a nice transmit combiner with a DB-411 300' and another DB-411 for the receive at 460'. Stay away from owners like american tower as they want min $250 per month.
 
Corey