extender

Hi guys. I hope I'm posting this in the correct section. I have made five VHF "extenders" for our low band system out of P110 portables. Three of them won't power up because they were installed without a "batter eliminator" voltage reduction circuit. Anybody know what component needs to be...

I am running a discone into my VHF low band scanner and picking up CHP from Chico to Merced and Truckee to San Francisco. I pick up cars in the Sacramento area most of the time as well. I only get signals on the EXTENDER frequency when a car is close to me. So far so good. When this first...