On Thursday, October 4, 2012 11:51:25 AM UTC-5, Wayne wrote:

The FCC currently requires that an aircraft radio has either 720 or 760 channels with 25 KHz spacing. As a result such radios as the 10 channel Genave Alpha 10 are not on the obsolete radio list, nor are any other radio with less than 720 channels. They are obsolete by definition. There is a link that identifies obsolete 720 & 760 radios on the following web page:
http://wireless.fcc.gov/services/ind...craft_stations

Wayne

Drifted a bit from the OPs question. But since it is going this way...

The link that Wayne provided states that the requirement is 30 ppm, and that THE MAJORITY of radios that meet this have either 720 or 760 channels. It does not say that "If you don't have 720 channels or more, it is not to be used for transmiting." It does say that if you have an older radio, it can be updated, but must be done with an FCC Type accepted upgrade kit. You cannot do it by putting in a better crystal, etc. Unless that is the FCC Type Accpeted method for that radio.

At the bottom is a list of Unacceptable Radios. There are many less than 720 channel radios on this list, so I am not willing to accept the "by definition, if it has less than 720 channels, it is obsolete" interpretation. RST radios are not on the list. If it was designed to meet the 30 ppm, why would it not be a legal for use now radio?

Lane, there is at least one RST 6 channel radio here locally. I will check with the owner and see what info is in the manual and maybe have him take a look inside the radio.

Steve Leonard