80 Channel UHF CB Launch

[user 10312]

Depends on what he means harder to hear. Ch1 on a 80 (77) channel set is the same as Ch1 on the old 40 Ch jobs. Ch41 on the newer 80 Ch. sets will be between the old Ch1 and 2 and so on. So the first 40 channels are the same the next 40 sit between the orginal 40

The old channel spacing was 25 Khz. Now the spacings are 12.5Khz. This is the case for commercial vhf/uhf comms to, as the spectrum is fairly well maxed out. As the techonolgy improves they figure that there less chance of adjacent channel/frequency interferance.

 

[mitch92]

What he said^^^

 

[nakedape]

Depends on what he means harder to hear. Ch1 on a 80 (77) channel set is the same as Ch1 on the old 40 Ch jobs. Ch41 on the newer 80 Ch. sets will be between the old Ch1 and 2 and so on. So the first 40 channels are the same the next 40 sit between the orginal 40

The old channel spacing was 25 Khz. Now the spacings are 12.5Khz. This is the case for commercial vhf/uhf comms to, as the spectrum is fairly well maxed out. As the techonolgy improves they figure that there less chance of adjacent channel/frequency interferance.

Yes, sorry 25hz and 12.5hz.

It's apparently not unusual to see a mismatch between send/receive strengths when a 80ch set is communicating with a 40 ch set. For example:

http://www.exploroz.com/Forum/Topic/88599/New_UHF_radio_has_low_transmitting_signal_volume.aspx