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-   -   Radios and Frequencies (https://www.rcuniverse.com/forum/rc-radios-transmitters-receivers-servos-gyros-157/3538435-radios-frequencies.html)

loorimar 11-10-2005 01:15 AM

Radios and Frequencies
 
Hi all,

looking to purchase my first radio. I am lookin at the Futaba 7C series. I'll initially be using it
on my boat and at this time do not plan on flying with it anytime soon.
My questions are:

-FM or PCM?
-72 or 75 Mhz? Is there a reason I shouldn't get a 72 Mhz if I plan on ever flying with this radio?
Would anyone care if I use 72 at a lake to drive my boat rather than 75?

Thanks
-Sebastian

Ross Kean 11-10-2005 07:01 AM

RE: Radios and Frequencies
 
Lots of reading here for PPM (FM) vs PCM. Do a search.

72 MHz is reserved for air while 75 MHz is for ground. Please do not intermix.

If you want a radio suitable for either, consider buying one with a module that can be switched so you can use both bands.

Ross

Bax 11-10-2005 12:08 PM

RE: Radios and Frequencies
 
It is against federal regulations to operate 72 MHz transmitters on anything other than aircraft. 75 MHz MUST be used for surface cars/boats/robots, etc....surface vehicles/models.

Zeeb 11-13-2005 09:13 AM

RE: Radios and Frequencies
 
Not to mention the fact that if there are any RC aircraft operating in the vicinity, you could shoot one down, or they could cause you problems.

There are reasons for the rules, you should follow them... :eek:

smokingcrater 11-13-2005 12:43 PM

RE: Radios and Frequencies
 
think of it this way, you crash 'em, you buy 'em! makes buying a new boat pretty expensive when you are paying for someone elses $3000 airplane that your radio crashed...!



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