crypto wrote:
Do all the big "DC to sunlight" rigs have cutouts where they dont DX/TX on cb? Because the specs Ive seen on say, the Yaesu 817 say stuff like this:
[...]
RX 0.1-56MHz, 76-154MHz, 430-470MHz
TX 1.8-432MHz (not 70MHz, not 220MHz)
As long as the radio reduces to the legal power limits for CB, GMRS, and MURS, it seems to me that it should be okay. Is that not the case?
Yes, ham rigs are at least programmed not to transmit outside the amateur bands. HF rigs can usually be opened up with a software change or very simple hardware mod (like removing one resistor and rebooting the radio). VHF/UHF rigs can similarly have their transmit range widened by a few MHz, but not as far as the HF rigs due to practical limitations of the hardware. For example, that FT-817's default transmit range is only the US amateur bands from 160m to 70cm, without 220 MHz. If you modify it to open up the transmit range, you get 1.8 - 33 Mhz (which includes CB at 27.mumble MHz), 33 - 56 MHz, 140 - 154 MHz, and 420 - 470 MHz (which includes FRS/GMRS in the 460s).
However, it's illegal to transmit on CB, FRS, or non-amateur licensed service bands with a radio that hasn't been specifically approved ("type accepted") by the FCC for that service, even if your transmission otherwise meets the applicable rules. Getting that approval is an expensive process, so manufacturers won't go through extra certifications if they don't have to. There may also be details in the regulations for some services that would make it impossible to integrate them with other services in the same radio.
Enforcement of all this is strictly complaint-based, though. If nobody can tell you're using a non-type-accepted radio, nobody will ever complain and you'll never be caught. Hell, even when it's obvious that people are violating the regs (like that guy on CB that you can hear from 100 miles away), nobody bothers complaining to the FCC. So legally, no, you can't do ham, CB, GMRS, etc. all in one radio. Practically, it's pretty easy (if expensive) as long as you don't mind the illegal aspect.