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440mHz

Repeater Testing

Well, results are less then stellar at this point. It has about a 2 mile radius at best. This is with only 6 Watts of output. I am fairly sure it hears much better then it transmits, One of two things will have to happen. 1) get an amp! At 6W I am already over the 100% duty cycle rating of the TKR-820 (5W) I can go to 20W if I run a 50% duty cycle, but if anyone gets to rag chewing, it is going to stress it beyond what I am comfortable with. A nice 50 or 100 watt amp should be fine, probably go 50W to start, and move up from there.  2) A better antenna would help as well.

70cm UHF Repeater Build Up, Update 3

So, still working 12hr/day storm detail, although we should be winding down soon, I was able to get a couple hours to cobble together the basic setup for the 440 repeater. I made up the coax cables to connect with the duplexer. The repeater is...

70cm UHF Repeater Build Up, Update 2

 
Well..... I have not had time to even look at the parts for the repeater in almost a week. The CQ WW DX contest was last weekend, and Monday the East Coast was hit with Hurricane Sandy. Being that I work for the electric utility company we have been busy with 12hr shifts since Monday, and there is no end in sight. I also have no power at home, so it is dark and chilly at night

Repeater frequency coordination process.

Just  a quick update on the frequency coordination process for a 70cm repeater.   Wow... Who knew it would be so much work to pick a pair of frequencies for use for an amateur radio repeater. You would think with 120 frequency pairs in the 70cm band plan that....

70cm UHF Repeater Build Up, Update 1

70cm UHF Repeater Build Up, Update 1. Have been looking into what radios and what controller to use for my 440MHz repeater.

70cm UHF Repeater Build Up

So..... I have this crazy, or maybe not so crazy idea to attempt to build a 70cm (440Mhz) , band repeater for amateur use. Why you ask, Keep reading to find out.

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