Jim, I'd be interested to know where in part 97 you find any restriction on FM below 29.5. (Without debating it, of course.) ARRL bandplan, yes, but FCC rules?
Keith, we're also stuck with band-planning on other bands which didn't anticipate the popularity of FM repeaters. 2m is even more screwed up. Why have only 600 kHz offset, when it could have easily been double that? Duplexers would have been smaller, less expensive, worked better, etc. The answer is nobody had figured out in the early 1960s that FM repeaters would grow to be the dominant mode on the band. Originally, repeaters used 30 kHz channel spacing with inputs between 146.0 and 146.4, then a 200 kHz buffer zone for simplex, and outputs between 146.6 and 147.0. When additional repeater subbands were added, it would have made sense to go to a 1 MHz split, but at the time too many repeater ops would have bitched about buying crystals and retuning duplexers. 73, Paul, AE4KR ----- Original Message ----- From: wd8chl To: Repeater-Builder@yahoogroups.com Sent: Tuesday, December 25, 2007 10:09 AM Subject: Re: [Repeater-Builder] Re: 10 meter desense help, split site, high noise floor. kb1we6r wrote: > Why oh why did they pick 100KHz??? The 10m band is HUGE with no > activity (even when the band is open, there should be plenty of room > for a better repeater plan). > .... Keith, WE6R in Monterey CA Nope-FM is only allowed above 29.500, so we only have 29.5-29.7 for ANY FM activity. Jim
