AM radios

[rmurf]

My brother pick a nexstar from a local hobby shop. and wanted me to teach him how to fly, little did we know it was a AM radio, the first flight the plane flew awsome, then the second flight i was going to get my brother on the sticks but that never happend :( so this dosent happend to anyone else when buying a plane check to make sure its a FM radio!!!! not AM....but i didnt think anything about becouse AM radios havent ben sold for aircrarft use in 10-15yrs...but the point is plz check to make sure it FM it well save alot of repairing time...HAPPY FLYING EVERYONE!!!! :D

[mohillbilly]

AM has nothing to do with it... I fly my 2M sailplane with an old JR AM RX in it. I have recorded ALT with a ZLOG @ over 1700'

I also still fly my OLD gas trainer with AM, its so old that it has non standard plugs, works great never been glitched.

Mo.

[ms08]

There is nothing inherently wrong with AM radio - it just depends on what it conflicts with and how many others in your locality are using it - here in the UK that could be CB radio, park flyers and R/c cars and boats so the norm here is to fly on 35mhz FM(park fliers aside) whilst cars and boats use 27mhz AM. The same problem could arise if you have two fliers about a mile apart both using the same ferquency (AM or FM) - you might get shot down which is why its worth checking who else operates in your area or joining a local club..

Mike

[rmurf]

See the thing is if you arnt around a airport AM well work fine....if your in a park or in the country Am well also work fine...but for some odd reason uphere AM dosent work all my FMs work fine, i know 6 ppl who lost a plane becouse of AM...

[Rodney]

AM is just as reliable as FM in a properly designed receiver. Unfortunately, some of the less expensive units are not well designed. There are also some oorly designed FM units out there.

[mohillbilly]

See the thing is if you arnt around a airport AM well work fine....if your in a park or in the country Am well also work fine...but for some odd reason uphere AM dosent work all my FMs work fine, i know 6 ppl who lost a plane becouse of AM...

I'll call on that I fly right next to the Miramar Marine base with F-18's flying in and out all day. I also LIKE it because some of the others that fly there are on the same CH as me, but we can fly side by side on the same CH he's on FM i'm on AM.

Mo.

[rmurf]

Yes FM can fail just like a AM but whyt are we loseing planes on a AM radio if guys arnt having promblems then why are me 6 other ppl having promblems

[mohillbilly]

Have you tried a diffrent location? There must be something not right. I don't think it has anything to do with AM/FM more of CH, location, equipment. I still can't fly my $15 blue bird 4ch RX on my buddys 14Z. You need to check everything, I had a cirrus RX that was great in my glider but went nutz with a motor. Do proper ground checks and above all if something is not right DON"T FLY.

Mo.

[mohillbilly]

http://www.rcgroups.com/forums/showthread.php?t=357623

http://www.rcgroups.com/forums/showthread.php?t=468625

http://www.rcgroups.com/forums/showthread.php?t=355208

[rmurf]

I do 3 range checks before i fly any of my planes, yes we have tried differnt locations...but when its in the air its a whole diff story.

[mohillbilly]

what is the brand and models of the TX and RX maybie we can work this problem for ya.

Mo.

[rmurf]

its a futaba

[mohillbilly]

little more info....

[50+AirYears]

Never had a problem with AM. Functionally, for R/C purposes, AM is not inferior to FM.

I've heard about AM and FM being flown jointly on the same frequency, but I have only seen one attempt to demonstrate it. One guy at our field was trying to demonstrate to someone else that it could be done. He fired up his "38" FM while the other flier was geting ready to fly his 38 AM. No interference! Luckily, I had not launched my Electra on 42 AM. The "Expert's" 38 was 42 FM, and while he didn't notice any interference from me, he would have crashed me.

Flying two planes on the same frequency is not a smart thing to do. If someone is managing to do it, the are very lucky.