project

Hello all! I have returned to seek expertise on a project I am creating. Task: Create a simplex repeater for search and rescue operations using a mobile radio. I am trying to find a way to boost coverage of team communications in a remote area. I currently have a 25w AnyTone AT-778UV which I...

Hello all, We are working on a school project in which we were tasked to design an FM receiver antenna that receives signals at frequencies between 900 Mhz and 1000 Mhz. What are some potential antenna builds/dimensions we should research? Where should we start? Thanks in advance, Sean & Raven

I was reading the Sacramento Fire Department's 2009 Annual Report, and inside the report, it states information about the rebanding process. On page 19, under the heading "Technical Services", bullet point 5, it states the following: "Continued planning for the 800 MHz Radio Rebanding...

I have a Yaesu VX-6r and still have the rubber duck antenna on it that I would like to replace. While I have looked for new antennas online, I would really like to make my own if possible. Does anyone know of good DIY plans, schematics, or websites that show how to do this. Preferably ones...

I'm a new-comer to the world of radio's and I need some help. I'm in high-school and working on a senior project. Basically our idea is a safety system for automobiles that cuts out the car radio when there is an emergency vehicle in in the area and inserts an emergency broadcast. The device...