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Horrible audio on TKR-820

I have been on and off battling this for a few weeks now. It's either too soft, too loud, overdriven, humming, whatever... So I dug into it this weekend and started ripping things apart. I also have  a Squelch board that I want to install, The squelch board uses discriminator audio to sence quieting and then give the controller a COR signal. The TKR-820 does not have a COR signal when the internal controller / signaling board is removed, at least none that I can find, I will still look into that.

Adding NOAA Weather Alerts to the repeater

I started thinking what is would take to interface a NOAA weather radio to the repeater to re-broadcast the weather alerts. One of the first concern that came to mind was, Is it legal? In short... Yes.

Follow along as I try to adapt a Si4707 for amateur radio use........

Spring / Summer 2013 Update

Haven't really updated the site in a while, been busy and have not had much of a chance to do anything more than some 2M/70cm FM while driving to work. It was a pretty cold and snowy Winter, however mostly uneventful. The repeater project is going ok. Still testing some stuff out, and quickly realizing that height is king. Where the antenna sits now appears to be in a bit of a valley. Unfortunately it is not on a tower, or other high perch. Coverage is a meager 2 miles, maybe. BUT with a clear shot through the valley, I can hear it about 20 miles away on my way to work as I crest a hill.

It's already February!, NAQP, House Hunting, and more...

It's already February!, NAQP, House Hunting, and more... Wow, where does time go, well here is just a little summary of some of the ham projects I am working on....

70cm UHF Repeater Build Up, Update 4

Spent a few hours working on the repeater last night. I was attempting to finish up the radio to controller cabling, but it didn't quite go so well.  It turns out to be quite difficult to solder 3 coax audio cables and some control lines to a D-sub-9 connector. Poor eyesight is definitely a factor which I need to remedy! So after all the lines were connected and plugged in to both the repeater and controller I gave it a go.

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

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.

Search for a better VHF/UHF Dual band Mobile Antenna


Since transferring within my company to a different office theTM-D710 in my car is getting much more use during my daily commute to and from work. For the most part I can get into the local repeater, but at the far end of my communte I am not holding the repeater as well as I should. I guess it is time to look for ways to improve, one way is a better antenna.

Why 70cm, and not 2M for my repeater?

So you may be asking yourself why I chose the 70cm band for my repeater and not the more popular 2M band. A couple reasons, read more >>


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