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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!att!fang!gator!inland!bloom
- From: bloom@inland.com
- Newsgroups: rec.models.rc
- Subject: Re: Anybody with experience in 2IM problems please contact me by email
- Message-ID: <1992Aug12.111135.2223@inland.com>
- Date: 12 Aug 92 11:11:35 CST
- References: <1992Aug06.182459.2674@bmerh85.bnr.ca> <1992Aug06.183610.2984@bmerh85.bnr.ca>
- Organization: Inland Steel Company; East Chicago, IN
- Lines: 25
-
- In article <1992Aug06.183610.2984@bmerh85.bnr.ca>, mkfeil@bcrki9.bnr.ca writes:
- > I am in the process of trying to convince my club that 2IM is a real problem
- > now that odd channels are much more common. Any two transmitters operating 23
- > channels apart have the potential of wiping out every single conversion
- > receiver no matter what channels the receivers are on. This is because a 23
- > channel spacing is 460 Khz, which is very close to the 455 Khz intermediate
- > frequency of single conversion receivers.
- >
- > This topic has received a fair bit of writeup in the model press, but I can't
- > seem to convince anybody that they should be putting up a single pin 23
- > channels away from their main pin. I have had one crash and one near crash
- > already this summer due to this. The near crash was a confirmed case of two
- > others 23 flying channels apart. Luckily I didn't have enough control to
- > throttle forward for takeoff! I have since switched to a dual conversion
- > futaba conquest system in my pattern plane, but there are still many people
- > out there (including me) who have single conversion receivers in some of
- > their planes.
-
- The easiest solution is for your club to make everone fly with dual conversion
- receivers. At my field in the suburbs of Chicago, single conversion AM
- receivers are pretty useless. I have witnessed 3 crashes as a result of
- some kind of radio interference hitting Futaba Attack AM receivers (Futaba
- claims these are narrow band, but they are not dual conversion). I don't
- believe it was 2IM interference as noone else was flying. I can only guess
- it was pagers.
-