|05-29-2003, 12:03 AM||#1|
RCC Master Contributor
I am: Brady Z
Join Date: Jan 2003
Location: Calgary, Alberta
Radio of choice:
# of RCs: 6
Feedback: 0 / 0%
Total Props: 0
AM vs FM
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What is the difference between the two? What are the pros and cons of each? Thanks.
|05-29-2003, 06:28 AM||#2|
RCC Supreme Contributor
I am: Andrew Coholic
Join Date: Sep 2002
Location: Timmins, Northern Ontario
Radio of choice:
Feedback: 5 / 100%
Total Props: 1
back in the days when I was strting RC (early 80's) the radios were all AM. Then the FM radios started to come out (at a lot more $$$). AM radios are more subceptible to interference. It has to due with the way the signal is "carried" on the transmitting frequency. In the same way as an AM radio station signal is more apt to be broken up by things such as weather, lightning,etc, an RC AM radio is prone to things such as glitching frommetal to metal contact, stray electrical noise from things like gas engine ignitions systems, and even servo wiring.
Today, even the basic cheap radios (4 channel and up) are all FM. I think only some parkflyer and rc car systems (and the toy stuff you get) are on am.
Dont buy a used radio that is AM - its not worth the trouble and receivers arent nearly as common. Probably not legal anyhow (gold stickered and post 91' freq).
There arent any bad points about FM, its an improvement in every way over AM!
Andrew Coholic -MAAC #26287L
1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's...
if its got a wing or two and an engine - I like it!
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