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Reciever antenna

Old 01-29-2007, 02:33 PM
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ChuckW
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Default Reciever antenna

I have a Futaba reciever with an antenna that somehow got in contact with the tail wheel. About 4 inches from the end, it got cut through all but 1-2 strands of wire. I'm sure I should probably just send it in for a new wire but I figured I would run it by a few people first. Since I'm not altering the length, could I just solder and heat-shrink the wire? Just thought I would check before I ship it out.

Thanks
Old 01-29-2007, 02:45 PM
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DadsToysBG
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Default RE: Reciever antenna

Yes you can. If you do nothing it will shorten the range on the plane. If you have to much look at the Deans antenna. Dennis
Old 01-29-2007, 03:26 PM
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bfd04
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Default RE: Reciever antenna

Since it is not a transmitting antenna length is not as critical. By soldering it it should not shorten i tby much more than an inch or so, It will be fine. Deans antenna's work very well I have one setup on one of my helis.
Old 01-29-2007, 03:57 PM
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Default RE: Reciever antenna

Cut off the damaged section and solder on a new piece to bring it back to the original length.
Changing its length changes its tuning.
Will it cause a problem?
Why take the chance?
Especially with such an easy fix?
Good Luck,
KW_Counter
Old 01-29-2007, 04:08 PM
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Charlie P.
 
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Default RE: Reciever antenna

Personally, I'd peel back the insulation for 1/2" in either direction and twist in some well cleaned bare wire of similar gauge to bring it back to the original strands in the spliced section and then solder; and finally cover the splice with heatshrink.

Then I'd reserve that receiver for an inexpensive plane that doesn't get very far away.

I can say this with certainty as this is just what I have done. Range test it under "real" conditions with collapsed AND fully extended transmitter. Saving $3 worth of wire and shipping to Futaba US is not worth the cost of a model, engine, and the rest of the gear in a plane.
Old 01-29-2007, 06:05 PM
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Geistware
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Default RE: Reciever antenna

Remember that the new soldered wire will be stiff at the joint.
Make sure it can't flex due to vibration.
Old 01-29-2007, 08:25 PM
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sscherin
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Default RE: Reciever antenna

A new antenna wire is only $1.59 plus $4 for parts express shipping

http://www2.towerhobbies.com/cgi-bin...&I=LXH355&P=ML

http://www2.towerhobbies.com/cgi-bin...&I=LXH356&P=ML
Old 01-29-2007, 10:27 PM
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ChuckW
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Default RE: Reciever antenna

Thanks, I didn't realize that was available. I have to order a few props so I'll get a couple of these too. I'm sure I could have patched the old one but then I would have a stiff spot with heat shrink tubing and so on. A new wire will be much cleaner.
Old 01-29-2007, 11:51 PM
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D-LOCO
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Default RE: Reciever antenna

I think these receiver antennas are roughly 1/4 wave length which is about a meter (what, 39" or so) at 72 Mhz.

As mentioned by someone here, since this is a receiver antenna, plus or minus an inch or two shouldn't hurt.

Dave
AMA 847123
Old 01-30-2007, 04:01 AM
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davo580
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Default RE: Reciever antenna

just buy another and solder it the apro[iate place
Old 01-31-2007, 02:06 PM
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X-Ray-RCU
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Default RE: Reciever antenna

You would need electronic equipment to tell the differance in one inch .

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