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Old May 14, 2012, 04:17 AM
markus123456 is offline
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Switzerland, LU, Buchrain
Joined Aug 2006
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Quote:
Originally Posted by secretspy711 View Post
the thicker the better, right? I used 1/4" OD refrigerator tubing. Will this work? This is for 1280MHz

(yes, I know it's left-handed)
No, the thicker the more wideband. A good thickness for this frequency would be 4.6mm ~0.18". It will work though.

The more wideband - especially a helica - is, the more it picks up noise from frequency wise nearby sources. You don't want that as it stuffs the RF input stage of your receiver. I personally strive to make my helicals as narrowband as it gets for the very reason. Again, it WILL work, and unless you fly in a urban area with a high RF noise floor, you will get good results.

HTH

Markus
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