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POCSAG Pager Encoder and Transmitter

Hello,
I am trying to build a pager encoder to send messages to a pager when I am at home. I live on a farm and we do not have cellphone service here.

I found a very interesting project at http://www.winpe.com/gascop/ that has software and hardware plans for performing this task. I think this would be the perfect solution for me. When I am out of the house, my wife could just send me an email, and it would get sent to my pager.

I have the Raspberry PI and the software is installed. I am confused by the circuit he is building though.

I am currently trying to order the parts he used, but cant find the PHT6N03LT. Does anyone know if there is a compatible replacement for this part?

Also, looking at his images, I see two blue devices on the circuit board. I am assuming they are some type of pot?

My ultimate goal would be to take this design, put it into eagle format and get my first professional circuit board printed. I could really use any advice I can get.

Thanks for your time
 
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