Quote Originally Posted by GQ TANK View Post
It wont be the differance betwen the 40 / 80 channel rigs as long as they are on the same channel. (and between channels 1 - 40)
40 - channel reciveing a transmission from an 80 channel - the recived audio is lower
80 - channel reciveing a transmission from an 40 channel - the recived audio is higher, worst case you could get some audio blocking (bit of no audio). But most of the cbs are desiggned to prevent this.
Correct.
Quote Originally Posted by Makka View Post
actully there is a differance the older 40 channel radio's are wide band and the 80's are narrow band if the recive or transmit is not intune it can cause this also sometimes if you are to close to each other it can cause this i have had it happen a few time at work....
GQ was correct and on the money. 25KHz Vs 12.5KHz channel spacings, deviations halved result in exactly what he said. Now somebody transmitting on Channels 79 or 80 nearby the troubled radio that could be an old 40 (Full DIN size is likely an 80ch radio) would see possible issues, not likely here.
Quote Originally Posted by Makka View Post
you should run it from a point in your fuse box. the only reason you would get interferance is bad earth
Incorrect, noise can come from anything such as bad radio front-end, bad antenna, loose fittings, corrosion on the fittings, hot-dry air blowing over antenna, poorly mounted antenna and location, etc. etc. Common issues seen now are bad/noisy electrical devices in the vehicle like cheap phone or USB chargers, cheap mains inverters or even in some cases, failed alternator diode. An AM guy who has been playing with radios since the 70's should know this....