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Esprit Model . Thunder Power RC . Real Raptors

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Radio - Servo - Gyro - Gov - Batt > Base Loaded Antena
 
 
Mark Ryder
Administrator
Location: Encino, CA

I am really sold on the use of base loaded antennas. The Revolution antenna with it's recommended 4 inch receiver wire length has worked flawlessly for me. I did have problems with the metal Quick antenna with it's recommended 10 inch receiver wire length (lockouts on the bench).

My setup
07-21-2001 Over year old.
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jfair
Senior Heliman
Location: Ft Lauderdale FL

I too have used the Revolution antenna with no problems, and have regulary flown circuts out 1000+ feet with no loss of signal. I've also tried the HHI metal base loaded antenna. No Problems.

On my new Vigor CS I put a new 10X radio, and hated to cut the antenna lead on a brand new radio. This is the only heli I fly with a standard antenna dangling there. One day soon I'll get around to chopping that one off to

Heres a question for everyoe. Where do you mount you antenna's?

I mount mine (Revolution) under the skids pointing backwards. Use the anntena tube hole and 1 screw to mount.

On the HHI Metal Antenna I mounted it on the back of the frame pointing backwards, halfway between the boom and supports.

Jeff
07-21-2001 Over year old.
 
 
jfair
Senior Heliman
Location: Ft Lauderdale FL

Mark, your pictures show a nice install on the anntenna. Did you cut a hole in canopy for it to poke thru? I've seen a couple done this way. It looks like a pitot tube, or infligt refueling nozzle sticking out
07-21-2001 Over year old.
 
 
Mark Ryder
Administrator
Location: Encino, CA

Did you cut a hole in canopy for it to poke thru?

No, it fits perfectly inside with about a quarter inch from touching.
07-21-2001 Over year old.
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freestyle
Veteran
Location: Redmond WA USA

I'm told that most whips will fail if the tip is not secured to keep it from vibrating, so mine are tied down. I've been running Hunter Alpine antennae for years this way with no problems.
07-21-2001 Over year old.
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Vitya
Veteran
Location: North York, Ontario

cool

If whip antennas are so good, why aren't they used more frequently? Is there absolutely any signal range loss? I am intrested because it would sure look good to have a smaller antenna on my rappy.
07-22-2001 Over year old.
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MitchD
Senior Heliman
Location: Antioch TN USA

Base Loaded Antennas

I use em in all my machines,1 st choice is the Revolution second is the Deans whip,I got in to em primarilly for use in gassers to keep the receiver away from noise generated by the plug and engine in general...
I always mount them where they can be seen thru the windshield,either horizontally or at a 45 degreee angle towards the frame,and I also use a plastic or metal bracket to mount it....
I know CY uses the stock antenna wire,(encased in a pushrod tube which has greater range than the base loaded whips),I guess its more out of the way for me using the whip but then again I dont fly as far out or up as CY does(lol).....
The Hunter Alpine whips were/are the best base loaded antenna ever made,HHI was quick to copy them,and turned out to be ummmm well not efficient or even tuned to 72 mhz fm and had a tendency to come apart(physically)
Also flying a lot in different areas the base loaded whip is less susceptible to getting hit by unknown garbage in the airwaves,as a 39 inch wire ant will be more apt to recieve better because of its length exposure etc..
07-22-2001 Over year old.
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jfair
Senior Heliman
Location: Ft Lauderdale FL

Do they still make the Alpine antenna, if so where can I find one?

Jeff
07-30-2001 Over year old.
 
 
Ken B
Elite Veteran
Location: Phoenix, AZ

I use Revolution antenea too. I have had a problem where an PPM reciever doesn't like it as much. My PCM has had no problems though.

Ken B
07-31-2001 Over year old.
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RappyTappy
Elite Veteran
Location: Las Vegas, NV

Deans Whip Antena

My original wire got freyed from continual vibration with my Raptor frame so I decided to put on a Deans Whip. I did I range check and I did have signal loss of about 20 feet from where my stock atena would still work from. Its not that bad, but still I had signal loss and I did everything per instructions and then some. Mabye the Deans whip is not as good as others, I don't know.
08-22-2001 Over year old.
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richardf
Veteran
Location: San Diego, CA Posts: Billions and Billions

Base loaded and carbon canopy

One of the guys I fly with at lunch is using a base loaded unit, he recently started to get an occasional glitch. His ship hasa full carbon canopy, today he's flying with a traditional receiver with standard antenna routed to the rear. I'll post the short term findings as we swap parts and try different canopies.

Richard.
08-22-2001 Over year old.
 
 
BladeRunner
Elite Veteran
Location: Ontario Canada. Member of "some sort" s

Base Loaded whip????

Is there any difference where the whip is placed, as far as front or rear? If it's at the rear, how do you keep the cut length to 4" in the case of the Revolution? If it's at the front isn't there a chance that the heli frame and mass will "shadow" the antenna? Or is it just the same if it's placed at the rear, will it be shadowed when the heli is approaching? If it's low enough on the skids I suppose it will be "visable" to the TX all the time. Just curious.----Barry.
08-22-2001 Over year old.
 
 
RappyTappy
Elite Veteran
Location: Las Vegas, NV

Base Loaded Antena

I put mine in the canopy. On my Raptor is sat in front of the collective arm, usually where some people put there gyro. I haven't seen a Raptor where is shadowed the signal so much as to loose control in that position, but if you put a Base loaded antena in a carbon canopy, that would be like a brick wall for the signal, right?
08-22-2001 Over year old.
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RappyTappy
Elite Veteran
Location: Las Vegas, NV

Base Loaded Antena

Today I was starting up my X-Cell Pro and I had radio interference. I was mad because I just recieved it back from futaba after paying them over 100 dollars to be fixed for radio interference problems. It was just idling and sometimes the heli would just twitch crazily and then go away. I tried moving my antena, but that didn't seem to help. I moved the connector pin where the antena wire connects to the reciever wire away from the heli and the interference went away. When I moved it close to the metal frame brace and near any electronics or carbon I got radio hits. Any ideas why this is doing this? I

Chris
Rex 500
Burning them electrons :D

Forever Brothers
Mickey Tylo
08-27-2001 Over year old.
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RappyTappy
Elite Veteran
Location: Las Vegas, NV

I found the problem

It seems that the connector pin is the problem. I moved it onto my raptor and if I shake the wire, the servos twitch. I wrapped the connector in some electrical tape and then pinned it between the foam wrapping for the receiver. As long as I don't let the connector pin wiggle around there is no radio hits anymore.

Chris
Rex 500
Burning them electrons :D

Forever Brothers
Mickey Tylo
08-28-2001 Over year old.
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alfred
Senior Heliman
Location: Australia, New South Wales, Mid North Coast

I use the deans wip in mine inside the canopy without problems.
As a Communications Technician I can tell you that the difference between our normal wire and wips should be more or less ignorable.
The reason is that our antennas are not tuned on frequency but widely tuned for the given frequency band.
We can do this as we use it mostly at line of sight without objects in the way. You have more signal loss when you point your antenna at the model then changing it to a wip.
But the Carbon Canopy of one of the replies would be a worry and myself I would be inclined to install it on the skids in this case.
09-07-2001 Over year old.
 
 
alfred
Senior Heliman
Location: Australia, New South Wales, Mid North Coast

I forgot to mention some things.
The pins and sockets that are used to connect the wip and the rest of your antenna are actually pins and sockets to make up DB9, 15, 25 Connectors. If you have a look at your Computers Parralel and Serial Ports you can see the pins and Sockets within the Shells.
At work we use them all the time as we make up specific purpose cables for our Communication devices.
To crimp them on we use a special type of Crimper (not cheap).
But this is not neccesary.
After you crimped the pin or socket on with a small pair of Pliers solder the pin/conductor connection to insure 100% contact.
When you plug your antenna cable into the wip use some small heatshrink tubing (the see through kind) to hold the joint properly together. If you have to separate them just use a sharp knive and cut the heatshrink off.
Even that they are disconnectable this should be done only on rare occasions.
The danger is not that it might get disconnected but the metal to metal noise right at the receiver input which would cause glitches.
With the amount of vibrations that our helis create (even a well tuned one) metal to metal noise is one of our greatest enemy.
09-07-2001 Over year old.
 
 
RappyTappy
Elite Veteran
Location: Las Vegas, NV

Crimping

I know that the crimping was 100% as I had a A&P technician who works on Gulfstreams accomplish the work for me. It is defintely airworthy! He should've signed it off

Chris
Rex 500
Burning them electrons :D

Forever Brothers
Mickey Tylo
09-07-2001 Over year old.
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Alan Szabo Sr
Key Veteran
Location: Las Vegas, Nevada

base loaded antennas

We have a fleet of 12 helicopters, all use the Deans except the hornets. They are all mounted on the side of the frames, (plastic and metal) pointing fwd inside on the canopy. With the Airtronics radios, we actually gained an extra 40 feet of range with the FM receivers, but with the PCM ones we loose about 20 feet compared to the wire prior to cutting. But in either case we have tried to climb up till it was hardley able to be seen and never had a lockout or range problem.
09-07-2001 Over year old.
 
 
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Mikado Modellhubschrauber . GrandRC . CanoMod

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Radio - Servo - Gyro - Gov - Batt > Base Loaded Antena
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