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HomeAircraftHelicopterHelicopter Main Discussion › Who still uses fm?
04-08-2010 04:22 PM  8 years agoPost 1
zackesch

rrApprentice

Milwaukee, Wisconsin

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I am curious to those who are still using fm radios. I am still using a jr 7202 and i would like to upgrade to a jr 9505 but i dont have that kind of money.

An offbeat question, do you think the rubber ducky antennas are worth the money?

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04-08-2010 05:20 PM  8 years agoPost 2
tadawson

rrElite Veteran

Lewisville, TX

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FM as in PPM or FM as in PCM, or either?

- Tim

Friends don't let friends become electrotarded . . . .

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04-08-2010 05:21 PM  8 years agoPost 3
z11355

rrMaster

New England

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is there a Spektrum module you can fit into the 7202?

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04-08-2010 05:36 PM  8 years agoPost 4
gogster2k

rrNovice

Montebello, CA. USA

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I still use a Futaba 7CHP for my TREX 450SE, but am thinking of buying a 2.4ghz receiver as I also have a Futaba 7C 2.4ghz for flying my TREX 600ESP and TREX 700E. I'm holding for now as I don't know what to do with the 7CHP radio after-wards. I love these radios! The other side of the coin is that there are others who have my frequency, so sometimes I have to wait to fly. Decisions!
I only seen one person at my field use a "rubber ducky", but it's for 50mhz (amateur radio license required) and he still ended-up getting knocked-out of the sky, so I'm not a fan of shorter antennas as they do not work as well as full length antennas as far as signal gain.
Hope this helps!
Regards,
Gogian

I can Fly!

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04-08-2010 05:37 PM  8 years agoPost 5
ErichF

rrElite Veteran

Sutton, NH

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Isn't 2.4Ghz still using an FM carrier? I think we all are still using FM in one form or another...but I know what you mean.

I gave up my PCM stuff back in 2007. I was the first one at the US Heli Nats on 2.4, I think.

Erich

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04-08-2010 05:39 PM  8 years agoPost 6
wheelman

rrApprentice

Kirkfield, (Coboconk), Ontario, Canada

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I'm still using PPM, & PCM on a few of my helis. I have a Spektrum module for my 9303, but only two Spektrum rx's. I fly at my home a LOT, and last year was experiencing "reliable" glitches in two specific locations on the property. When I almost lost my Predator gasser to a random glitch (very low altitude) I decided to go 2.4. Funny thing is I'm not seeing these problems this year with FM! I'm in the same boat as you as a budget flyer, so can not afford to upgrade everything all at once. I did a trade deal to get the module for the TX, and then hunted aggressivly for the required rx's. I'm checking the various classifieds constantly for inexpensive 921's. You need to be really fast to get the lower priced ones. I have a feeling the prices have hit their lowest of all time, so feel the time to buy is now before things creep back up.
I'm also scared there may be someone else in the area on a channel I'm using so this is even more motivation to go 2.4 for me. I'd hate to be shot down by someone else doing the same as me or for that matter shooting someone else down.

Just curious, is there a cure for this addiction?

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04-08-2010 06:35 PM  8 years agoPost 7
BarracudaHockey

rrMaster

Jacksonville FL

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I have a couple of gliders left on 72 mhz pcm. I'm still not 100 percent comfortable wrapping a 921 in carbon kevlar and sending it to the edge of where I can see it.

Andy
AMA 77227
http://www.jaxrc.com

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04-08-2010 07:43 PM  8 years agoPost 8
philthewrench

rrApprentice

Westchester Co. NY

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I'm still on 72Mhz. I got my 9303 just before 2.4 really took off. Now with 18 models, 5 that need 9 channels, that's a whole lot of cash to upgrade at once for some equipment that works great. Plus I'm almost always flying alone and fortunately when there is someone else flying at my spot they're always on 2.4 anyway.

Phil

... and now my impression of a lawn dart .......

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04-08-2010 07:50 PM  8 years agoPost 9
jackheli

rrProfessor

Vancouver - Canada

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I moved all my PPM receivers to planes. My scale helis have PCM and my 3D all have 2.4. Quite a mess to keep track of...

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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04-08-2010 08:19 PM  8 years agoPost 10
falcon

rrKey Veteran

UK

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The answer to your question
Who still uses fm?
We all do.

PCM, PPM, 2.4 ghz, 35mhz, all are FM

PCM or PPM only refer to the code the TX uses to comunicate to the RX.

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04-08-2010 08:42 PM  8 years agoPost 11
broggyr

rrKey Veteran

Naugy, CT

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PCM here. The fact that more and more folks are using 2.4 means less competition for my frequency

- Brian
irony [ay-ruh-nee', ay-er-nee'] adj.: Like goldy or bronzy, but made of iron

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04-08-2010 08:58 PM  8 years agoPost 12
zackesch

rrApprentice

Milwaukee, Wisconsin

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So by the sounds of it, there really isnt a big need for me to switch to 2.4 then. If that is the case, im debating if i should find a used fm 9303 or make the jump to 2.4 with the 9505. I have only one heli btw, so the rx bit of it isnt a problem.

My 7202 is pcm

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04-08-2010 09:01 PM  8 years agoPost 13
Four Stroker

rrElite Veteran

Atlanta

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Yeah, and 2.4 GHz spread spectrum is also PCM before and after you spread (the code).

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04-09-2010 12:25 AM  8 years agoPost 14
helibeast

rrApprentice

Mn

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Yep still use it. but with 11 radios I'm not in a hurry to add more.

Champion,Magic,MiniBoy,Xcell60+50,Intrepid,Intrepid Gas,Baron30,Whisper,300X,mCPXv1v2,Concept,Nexus

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04-09-2010 02:16 AM  8 years agoPost 15
tukkus

rrApprentice

ma

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All of the old timers in my club still and always will use FM. They dont see the need to change over especially since all they do is fly planks.

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04-09-2010 02:17 AM  8 years agoPost 16
ADHD

rrApprentice

Jacksonville, FL

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Whats FM?

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04-09-2010 02:42 AM  8 years agoPost 17
LonR

rrElite Veteran

Macomb,Mi

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I soooooo wish I kept my FM Futaba 7CHP.Had to send my Spektrum DX7 in because I got a backup error from leaving the power on and unplugging the battery ..

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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04-09-2010 07:30 AM  8 years agoPost 18
falcon

rrKey Veteran

UK

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Whats FM?
FM = Frequency modulation this what we all use today.
AM = Amplitude modulation this is what we used a long time ago.
In simple terms FM transmits a fixed width carrier and the information is transmitted inside that carrier.
AM transmits its information on the carrier and the carrier width will vary with the information transmitted.

The only thing that is new or has changed is the information that we transmit on the carrier.

Search Google for some more in depth info

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04-09-2010 07:37 AM  8 years agoPost 19
RAPTOR 4D

rrVeteran

GRANGER,IN,-USA

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The only FM that I deal with is on the radio I listen to

Raptor 50 Titan SE

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04-10-2010 12:55 AM  8 years agoPost 20
tadawson

rrElite Veteran

Lewisville, TX

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FM = Frequency modulation this what we all use today.
AM = Amplitude modulation this is what we used a long time ago.
In simple terms FM transmits a fixed width carrier and the information is transmitted inside that carrier.
AM transmits its information on the carrier and the carrier width will vary with the information transmitted.
Either your terminology is odd, or this is just plain wrong . . .

The only term with "width" in it is "bandwidth", and both will consume a variable bandwidth depending on the information being sent . . . The difference is:

AM: The frequency stays the same, the strength of the signal is varied to encode info.
FM: The strength of the signal stays the same, the frequency is varied to encode info.

- Tim

Friends don't let friends become electrotarded . . . .

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HomeAircraftHelicopterHelicopter Main Discussion › Who still uses fm?
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