For quite some time, we have considered establishing standard simplex frequencies for use within the CAUHF Group (and for anyone else who wishes to play along with us). All of these frequencies fall within the ARRL Band Plan for VHF and UHF. Here’s what we’ve come up with thus far. NO TONE on any simplex frequency. During special events, disaster drills, etc., we can refer to these as “tactical channels”. These frequencies are taken from a similar plan developed by the New York City Amateur Radio Emergency Communications Service (ARECS). They came up with more than 10 and they use tones, but these 10 should enough for us, at least for now. Program all of these simplex frequencies into your mobile radios and HT’s. You never know when you might need them.
|VTAC Channel||VHF||UTAC Channel||UHF|
|VTAC-1 National Simplex||146.520 MHz||UTAC-1 National Simplex||446.000 MHz|
|VTAC-2||146.535 MHz||UTAC-2||446.025 MHz|
|VTAC-3||146.550 MHz||UTAC-3||446.050 MHz|
|VTAC-4||146.565 MHz||UTAC-4||446.075 MHz|
|VTAC-5||146.580 MHz||UTAC-5||446.100 MHz|
Some folks just pick any old frequency for simplex but that really is not wise. If you are not careful, you can accidentally pick a repeater frequency. Also, you must remember that VHF simplex frequencies need to be at least 15kHz apart and UHF simplex frequencies need to be at least 25kHz apart (as shown above) to avoid interfering with each other. We started with the VHF National Calling Frequency as the baseline at 146.520 and, for each succeeding “channel”, we went up 15kHz. We also started with the UHF National Calling Frequency as the baseline at 446.000 and, for each succeeding “channel”, we went up 25kHz. At this point, this is merely a proposed plan–just a suggestion. Let’s hear your thoughts.