AM FM
#1
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AM FM
If two people were racing and one had 75 fm channel 68 the other
was using 75 Am channel 68 would there be a problem with
interferance .
Thanks Ken
was using 75 Am channel 68 would there be a problem with
interferance .
Thanks Ken
#4
RE: AM FM
ORIGINAL: piper_chuck
Only for the first few seconds. After that, they'd both be watching everyone else race.
Only for the first few seconds. After that, they'd both be watching everyone else race.
Happened to me last year, a fellow flyer had a brain fart and turned his old Futaba Attack AM Tx on to check the battery, luckily I was 3 mistakes high[sm=spinnyeyes.gif].
Pete
#7
RE: AM FM
ORIGINAL: pilotpete2
Except that with PCM you'd have "crash safe" kick in to save you.
Pete
ORIGINAL: bruce88123
And in case you're wondering, PCM would be just as bad.[:@]
And in case you're wondering, PCM would be just as bad.[:@]
Pete
#8
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RE: AM FM
ORIGINAL: pilotpete2
Except that with PCM you'd have "crash safe" kick in to save you.
Pete
ORIGINAL: bruce88123
And in case you're wondering, PCM would be just as bad.[:@]
And in case you're wondering, PCM would be just as bad.[:@]
Pete
Ken
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RE: AM FM
Looks like a couple have you might have missed the little "75" clue that leads me to believe the OP is talking about racing either cars or boats. If it's cars, the consequences might not be too bad, but I've seen quite a bit of damage done to/by an out of control boat.
We had to restart a heat last weekend when a boat lost control. It started doing circles at full throttle. Fortunately, instead of having to play dodge boat, the CD told the rest of us to come in. The circles got closer and closer to shore, but fortunately, it ended up spinning out just before a loop that would have put it smack in the side of the aluminum retrieve boat. Cause of the problem? Driver forgot to check the battery charge, they were dead!
We had to restart a heat last weekend when a boat lost control. It started doing circles at full throttle. Fortunately, instead of having to play dodge boat, the CD told the rest of us to come in. The circles got closer and closer to shore, but fortunately, it ended up spinning out just before a loop that would have put it smack in the side of the aluminum retrieve boat. Cause of the problem? Driver forgot to check the battery charge, they were dead!
#12
RE: AM FM
Ken,
That's why I fly good old PPM receivers, if I get a glitch, I'd rather know about it right away. Or maybe I'm just to "frugal" (read cheap) to go with PCMs
Pete
That's why I fly good old PPM receivers, if I get a glitch, I'd rather know about it right away. Or maybe I'm just to "frugal" (read cheap) to go with PCMs
Pete
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RE: AM FM
ORIGINAL: Robotech
Actually, no. I used to fly with a buddy all the time that was using 72Mhz AM Ch.54 and I was using 72Mhz. FM Ch.54. Never had even a glitch.
Actually, no. I used to fly with a buddy all the time that was using 72Mhz AM Ch.54 and I was using 72Mhz. FM Ch.54. Never had even a glitch.
Sounds like they were both out of tune in opposite directions! Can't think of any technical reason why you both were not shot down...
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RE: AM FM
ORIGINAL: Robotech
Actually, no. I used to fly with a buddy all the time that was using 72Mhz AM Ch.54 and I was using 72Mhz. FM Ch.54. Never had even a glitch.
Actually, no. I used to fly with a buddy all the time that was using 72Mhz AM Ch.54 and I was using 72Mhz. FM Ch.54. Never had even a glitch.
#16
My Feedback: (2)
RE: AM FM
The car market is moving to 2.4 GHz very very fast to eliminate this issue completely. If you have a new purchase in mind, go 2.4 GHz.
But AM and FM channels, whether 72 MHz planes or 75 MHz cars will definately interfere with each other if they are on the same channel
But AM and FM channels, whether 72 MHz planes or 75 MHz cars will definately interfere with each other if they are on the same channel
#17
RE: AM FM
A friend of mine and I found out accidentally one afternoon that his channel 18 PCM and my channel 18 PPM could co-exist quite well. We inadvertently got in the air at the same time and WERE glitch free. I did land ASAP when we realized what had happened so as not to press our luck. Further ground checks after verified we were both on 18 and that neither had any problems. All equipment was Futaba. He and I were standing about 25 feet apart on the flight line.
This is NOT recommended though and we still don't understand why we had no problems.
This is NOT recommended though and we still don't understand why we had no problems.
#18
My Feedback: (2)
RE: AM FM
I have heard such reports based on Berg receivers too. Some of these claim to recognize the unique signature of your transmitter's wave form, but I would not depend on either. Smart to land ASAP!
I have been promoting 2.4GHz with all the new flyers so that this problem can be a thing of the past. Get them into the current wave and let those of us on the old technology deal with it until we move forward as well.
I have been promoting 2.4GHz with all the new flyers so that this problem can be a thing of the past. Get them into the current wave and let those of us on the old technology deal with it until we move forward as well.