I would say any length will be fine.
does it matter what kind of wire you solder to the RG316, ie does it have to be copper ? I have a spool of 28 gauge wire I got from an auto parts store but Im not sure what it is.
Loads of info here, its going to take several re reads for this to sink into my thick skull lol
I just received the 8-ch EZUHF and it came with two whip antennas with 23cm extensions. Instead of using these, I'd like to make a set of sander style antennas and two dipole antennas.
I want to make sure I got this right:
The sander style antennas must be mounted directly to the EZUHF so as not to change the antenna length and must be in a V configuration.
The coax on the dipole can be made as long as needed to get the antenna and ground leads to each wing tip. I can put a coax connector just outside of the fuselage so I can remove the wings for transport. Is this correct?
Also, how far should the Vtx be mounted from antennas? I am using a 600mW 5.8GHz which is currently mounted just in front of the vertical stabilizer on my Easy Star, but I am looking to move it just behind the cockpit because I am getting a lot of glitching on the video.
Just out of interest, you can make a sander style dipole too... Just like the normal sander style but then solder the correct length of wire to the bottom of the sma connector. You can then leave it to just dangle out the bottom of the plane... It won't be quite as effective but will be an improvement over the normal sander style and makes for easy installation.
Last edited by Zeeflyboy; 22nd May 2012 at 03:09 AM.
It's going to be couple of weeks before my parts arrive to make the sander style and dipole antennas. I'm going to mount the stock whip antennas that came with the EZUHF so I can fly. What is the best orientation on these? Should they be 90 degrees apart on X and Y axis or Y and Z axis? I want to mount one on top of one of the wings and the other under the other wing. Do you think this setup will be ok?
I have done some experimenting and thought I would share what I did.
Originally, on my Twinstar II, using all immersion gear, ezuhf, ezosd, 600mW vTx 5.8Ghz.
I started with Turnstile antenna, one on each wing.
Would get out to around 1.9 KM and then I would see rssi start to climb and then antenna strength start to drop. This was in low power.
So I decided to make a change.
I left the turnstile on one wing to handle the higher flights, and put a sander style on the other input.
Sander style antenna don't have to work in pairs, you can use them with other antenna, which to me makes sense for a diversity receiver.
Using 2 Sander Style in the bunny ears helps to take care of the change in angle when you turn.
They don't feed off each other.
Well what a difference. I fired past 2 km to 3 km no problem with the numbers staying solid, and a noticeable difference in rssi throughout the flight.
I had great video and signal, just going to push things a bit at a time.
Was thinking of a sander style and dipole to see how things work with that combination.
If I am using your swr 433mhz meter what would be the best way to tune the antenna? should I start off at at 330mm at cut it down equal on both sides? What swr would I get when it is tuned?
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