RSO helo on UHF

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sp1989
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Joined: Thu Jun 04, 2009 4:08 pm

RSO helo on UHF

Post by sp1989 » Thu Feb 04, 2016 4:52 pm

Just heard RSO's helo announce its' presence on 369.0 mhz, much like military aircraft fo on 255.10 mhz. Pilot ID'ed as "Sheriff's helicopter" with position. I could see it in my neighborhood at the same time.

brandon
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Location: Riverside County
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Re: RSO helo on UHF

Post by brandon » Thu Feb 04, 2016 7:06 pm

369.000 is the third harmonic of 123.000 MHz (Hemet Ryan CTAF freq) so most likely the air unit was pretty close to you when he keyed up :)

sp1989
Posts: 1017
Joined: Thu Jun 04, 2009 4:08 pm

Re: RSO helo on UHF

Post by sp1989 » Fri Feb 05, 2016 2:31 pm

Yes, he was almost directly overhead. Thanks for clearing that up! Haven't really thought about harmonics since the days you could use the image to listen to cellphones =)

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