RunRyder RC
 6  Topic Subscribe
WATCH
 1 page 703 views
Scorpion Power Scorpion Power
HelicopterBeginners Corner › Antenna Wire
08-11-2007 01:46 AM  10 years agoPost 1
garaptor

rrApprentice

Atlanta,Ga,usa

My Posts: All  Forum  Topic

I've been flying for about a year with a JR PPM receiver with a little stubby 7inch anntenna that I can hide in the canopy. Today I converted to a JR PCM with a 2foot wire for an Antenna. What the heck am I supposed to do with all this wire? Obviously I need to keep it away from the hot motor and moving linkages, but can I wiretie it along my Boom support rod?

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
08-11-2007 02:39 AM  10 years agoPost 2
herby8860

rrApprentice

Conneaut Ohio

My Posts: All  Forum  Topic

What size heli ? And only two feet on the antenna? Sounds like it is cut. I will edit in a bit and post pics of my antenna tube.

PM  EMAIL  Attn:RR  Quote
08-11-2007 09:06 AM  10 years agoPost 3
flipped2left

rrKey Veteran

indianapolis,in.

My Posts: All  Forum  Topic

go buy a 2 meter ham antenna and a matching connector,cut just enough wire from your rx to reach the connector(depending on where you plan on mounting it), if the wire is too short add some, you won't be sorry!

Smile! people will wonder what you're up to!!

PM  EMAIL  GALLERY  Attn:RR  Quote
08-11-2007 09:42 AM  10 years agoPost 4
airmobile

rrApprentice

Santa Clarita,​Calif.

My Posts: All  Forum  Topic

flipped2left: Why 2-meter? That band's freq range is 144-148, if I recall. Wouldn't the optimal length of his Rx's antenna be different?

PM  EMAIL  Attn:RR  Quote
08-11-2007 02:50 PM  10 years agoPost 5
garaptor

rrApprentice

Atlanta,Ga,usa

My Posts: All  Forum  Topic

Its 3 ft long on a brand new pcm jr rx.( I didnt measure it the first time) Its a raptor 30. My question was can I tie it to the boom support without fear that the aluminum will somehow intefere with the signal strength.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
08-11-2007 07:34 PM  10 years agoPost 6
legoman67

rrElite Veteran

Nanoose Bay B.C,​Canada

My Posts: All  Forum  Topic

what alot of ppl do is use an elastic band on the horizonal stabilizer and tie the antenna to that, that way if you have a boom strike you wont wreak your antenna

PM  EMAIL  GALLERY  Attn:RR  Quote
08-12-2007 12:29 AM  10 years agoPost 7
doorman

rrProfessor

Sherwood, Arkansas

My Posts: All  Forum  Topic

Cut It OFF

Why not just cut it off per the instructions in the Revolution whip and mount the whip on a plank control horn and mount it anyplace you like.... easy and clean....
Look over some of the pic's in my gallery and you will see them on all of my heli's....

Good Luck, Stan

AMA 2918-Team JR, Spin Blades, East Coast Scale Helicopter,Castle Creations

PM  EMAIL  GALLERY  Attn:RR  Quote
08-12-2007 02:44 AM  10 years agoPost 8
kangarooster

rrApprentice

Orlando Fl-USA

My Posts: All  Forum  Topic

72 times 2 equals 144.

PM  EMAIL  GALLERY  Attn:RR  Quote
08-12-2007 02:50 AM  10 years agoPost 9
oldboldpilot

rrKey Veteran

Southern California

My Posts: All  Forum  Topic

garaptor,

Most helis come with a plastic tube to rout the antenna thru..

This tube usually runs thru holes in the landing gear.

Assuming the RCVR is up front, you rout the antenna wire thru fuel tubing to the front of the plastic antenna tube, which you would position as far forward as the ccanopy permits, thence out the back of the antenna tube. If you have antenna length left over, tie it to the tail vertical fin; make a knot.

Yes, there are "short" antennas, but they do not really provide the range performance of the full-length antenna wire provided by your radio supplier - even with the routing described above.

By the way, you need a lubricant to easily push the antenna wire thru the plastic tube; I recommend "Fantastic" or whatever you use to clean your heli off. Squirt some in the end of the tube, and the wire should go thru easily.

Helis are Man's Defiance of the Laws of Nature - OCHC

PM  EMAIL  GALLERY  Attn:RR  Quote
08-12-2007 09:03 AM  10 years agoPost 10
flipped2left

rrKey Veteran

indianapolis,in.

My Posts: All  Forum  Topic

Yes the 2 meter antenna is cut for 144-148 mhz, and is basically a 1/4 wave, using it for 72 mhz would make it a half wave for that given frequency and kangarooster is correct 2x72 equals 144, i use one on my gasser and have never had a problem.
oh wait, now for all of you that realise that 72 mhz is a mirror freq. for the ham band, i guess us ham operators will now be at fault for shooting down a heli!! better check part 97 of the fcc rules and regs first!

Smile! people will wonder what you're up to!!

PM  EMAIL  GALLERY  Attn:RR  Quote
08-12-2007 03:25 PM  10 years agoPost 11
doorman

rrProfessor

Sherwood, Arkansas

My Posts: All  Forum  Topic

Range.......

Yes, there are "short" antennas, but they do not really provide the range performance of the full-length antenna wire provided by your radio supplier - even with the routing described above.
Well, as usual, someone asks a simple question and they get the scholastic version of an answer....
Now I am no "rocket scientist" and never will be, BUT I have used whip antennas since I starting flying heli's in the early 90's and I have never flown out of range with a whip type antenna... not to say that they don't shorten the range, but I have been out just as far, if not further, then what most would consider comfortable and never so much as a glitch!!! And the initial range checks have been as good or better then the full length supplied with the rx....if you take a look in my gallery, you will notice that these are on my pod and booms and my scale machines....and a couple of shots of how I mount mine... on the blue and silver Jet Ranger you can see the white antenna just above the wind screen, that is a Deans whip bent and protruding just like the full size and it works just fine like that..

I know that there are some others on here that will tell you not to use a whip, but since you spent your first year flying one, I think that you already have the $9.95 answer to your problem and it also makes the install look so much cleaner then that ugly wire hanging out the back of you machine....

But at least you have both sides of the story and now it is up to you to choose.....

Best of luck....Stan

AMA 2918-Team JR, Spin Blades, East Coast Scale Helicopter,Castle Creations

PM  EMAIL  GALLERY  Attn:RR  Quote
08-12-2007 10:01 PM  10 years agoPost 12
garaptor

rrApprentice

Atlanta,Ga,usa

My Posts: All  Forum  Topic

Thanks everyone. I picked up some antenna tubing at the lhs and cable tied it to the front hole in frame and to boom support with plenty of slack at front and rear in case of crash. My range check was aprox 170 feet.As noted I have flown over 200 flights with a whip antenna and have flown so far out that I couldnt tell which way it was pointed,and have never had an issue with range. I like the "clean" look of the hidden antenna and have never liked the wire hanging out and tied to the stabilizer.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
08-13-2007 12:04 AM  10 years agoPost 13
tryan02

rrProfessor

Canton, Missouri

My Posts: All  Forum  Topic

Ham operators don't always follow rules and there radios overpower a rc radio by quite a bit so if there second harmonic is not filtered with a LPF it can kill a heli. Yes I lost a plane a quite a few years back like 20 and still am a little bitter my plane locked with right aileron and down elevator. I now exclusively fly 2.4ghz spectrum as they are TX RX specific not channel with a digital signature. Oh and by the way me and some friends went out later and stuck tacs in his coax half way up his tower shorting his cable. 20 years later I work in broadcast electronics

No Really I am the club President!!!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
08-13-2007 04:40 AM  10 years agoPost 14
flipped2left

rrKey Veteran

indianapolis,in.

My Posts: All  Forum  Topic

well that is very interesting to know that you did what you did TRYAN02 BUT! if you read your manual for your radio it says "must accept interference from other sources but may not cause interference" what part of that did you not understand?
oh and i do follow the rules, i also know of people that don't but thats not my problem. and are you sure it was a ham operator? it could've been a cb'r they alway run rampant on our bands constantly and use power that they are prohibited on the 11 meter bands.
so you go and stick a thumb tack in a guy's co-ax how brave of you!
i'm glad you don't live near me! i don't have a tower, no outside co-ax, but next time why don't you just knock on the persons door and be courteous and discuss the problem! we are not all that bad,we actually save your ass, when severe weather comes your way, who do you think reports to the weather service?, think about that the next time you hear a siren going off or a weather bulletin on your tv!!

Smile! people will wonder what you're up to!!

PM  EMAIL  GALLERY  Attn:RR  Quote
08-13-2007 11:39 AM  10 years agoPost 15
tryan02

rrProfessor

Canton, Missouri

My Posts: All  Forum  Topic

I was a 14 year old kid I'm now 20 years older I would of confronted him now. And either way cb or ham his tower was the only thing within 10 miles of the flying field. Those guys ruin the band for everyone And knowing this man he probably was looking out his window enjoying what he did as it happened to quite a few of us he cussed those whiney little engines all the time and we all had different channels so it wasn't us. Just my troubled teen years

No Really I am the club President!!!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
WATCH
 1 page 703 views
Scorpion Power Scorpion Power
HelicopterBeginners Corner › Antenna Wire
 Print TOPIC  Make Suggestion 

 6  Topic Subscribe

Monday, November 20 - 7:19 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online