FCC certification doesn't matter whether you live in the "sticks" or in a big city. I have many RF devices around my house also but they are not certified because I am not selling them. However, I have made one device that needed FCC certification because I am selling it.

I use the Linx LR series chips and they work very well. No need for Manchester encoding and they are pretty cheap. I'm not sure how much the TWS is but you can get a pair of Linx chips for about $15 depending on where you get them. They have pretty good range (100-3000 feet) depending upon the antenna and board design, and have very little noise. Furthermore, if you want to send a decimal 1, then you send a decimal 1....no need for 10101010.

My reason for asking the questions was money. There are many devices (quantites of 1 or 2) that I want to make for customers but I can't legally sell them because they need FCC certification. It's simply not worth it to go for a certification on a product that costs $100 to build but $5000 to certify and never sell it again. If the FCC certification is in fact not required, it would be very advantageous for me to use them.

I was told they work on AM frequency and this is why it does not need FCC certification. If anyone knows if this is true, please let me know.

Thanks,

Chris