I went a step farther with my handheld Bearcat scanner and placed it in a steel pie cake pan with a cover I made from aluminum flashing. A few clothes pins around the cover sealed the signal up so that the only external signal came from the BNC feed through connector mounted on the side of the cake pan.
I put a 10 dB pad internal between the scanner and the connector and then used a step attenuator external to the cake pan to set the level to the receiver I was trying to tune. I used it to tune a transmitter to frequency also by zero beating the Bearcat signal into a receiver. My Bearcat had a 10.8 mHz IF and I kept a calculator handy to add 10.8 to whatever frequency I wanted. The second harmonic of the LO in that old handheld worked great to intercept the analog cell sites in the area. You could take the antenna off and the reception did not change on the cell frequencies. Setting the cell frequencies minus 10.8 divided by two then plus 10.8 gave me the 440 frequencies to program into the scanner. 73 - Jim W5ZIT --- On Thu, 12/25/08, [email protected] <[email protected]> wrote: From: [email protected] <[email protected]> Subject: Re: [Repeater-Builder] Re: Helper Instruments To: [email protected] Date: Thursday, December 25, 2008, 11:44 AM At 12/24/2008 12:45, you wrote: >The SM-512 is a service monitor that covers 1 to 512 MHz if memory >serves correctly. It has a built in Sinadder and Millivolt meter. The >system was designed around a Bearcat scanner. When Bearcat quit making ...and everyone thought I was nuts for using a Regency scanner as a deviation monitor & signal generator. Bob NO6B ,___
