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Old Jan 09, 2012, 07:37 AM
chemnut842 is offline
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United States, MD, North East
Joined Apr 2011
281 Posts
Ok so I built the SPW for the first time and it looks alright but performs awful. I recorded a LOS flight and upon reviewing the vid, there is no way anybody could fly fpv with this.

There are slight problems with my antenna. After reading I think the problem is my feed gap. I measured mine to be 9.5mm and I did not incorporate any hooks into the center joint.

Both Tx and Rx antennas are RHCP (RHCP = tractor prop, LHCP = pusher prop?) and the Tx antenna is a CL. I am on 1280 MHz.

should I bend hooks to be ~10mm or should I just shorten the feed gap or both?

I have a 5-turn helical that I just set flat on the ground and that works fine for flying around LOS or ~ 300-700 feet without pointing it - I have not flown far yet but at least I know my other components are working.
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