I had a little time on my hand today and I decided to post this article. I thought about making a portable full range diversity goggles out of my Dominator V3’s without actually making any modifications to the goggles. The solution jumped into my mind as an easy, half an hour project – assuming that you have everything at hand already. The results in reception were astonishing, about 50-60% better signal reception than using the standard Raceband module in the Dominator V3 goggles. Let’s see a picture of what we are making:
I have to say from the beginning that this is not a complicated project. Anybody can do it, the only complicated part on it is to splice a cable and to add a connector to it, so a little bit of soldering skill is required. Also the real advantage to this is that you do not need to modify the goggles, you do not require to open them or replace the bay doors. If you do not like the results you just simply remove the 3M tape from the goggles and it is back to the original value. let’s see what we need for this project:
|The beauty of this project is that you can do it with any Fatshark goggles, but the newer ones with the Faceplate are preferred for this since the faceplate is wide and tall enough not to tip the goggles forward from your face. If you don't have one and would like to purchase one, you can find goggles here: http://www.nghobbies.com/cart/index.php?main_page=index&cPath=1_170_171&pg=store|
|The Diversity Duo will provide the diversity reception for the goggles as an external device. You can find it here: http://www.nghobbies.com/cart/index.php?main_page=index&cPath=1_5_95|
|When using a diversity receiver for your goggles it is calling for the use of directional high gain antennas so you can achieve better quality, amplified signal from further away. Antennas are located here: http://www.nghobbies.com/cart/index.php?main_page=index&cPath=1_10_39_240|
|We need to solder this into the following DC to DC cable so we can provide power to both - Goggles and Diversity receiver from the same battery. You can find this connector here: http://www.nghobbies.com/cart/index.php?main_page=product_info&cPath=1_10_82_88&products_id=1498
|This cable is required to run the power from the goggles to the Diversity Duo receiver. You will need to splice this cable on one end and insert the above connector to it so you can plug in the battery: http://www.nghobbies.com/cart/index.php?main_page=product_info&cPath=1_5_95&products_id=1361|
|This cable runs the outgoing AV signal from the Diversity Duo to the goggle's input port. You can find it here: http://www.nghobbies.com/cart/index.php?main_page=product_info&cPath=1_5_95&products_id=1360|
|This tape is required to hold the Diversity receiver in front of the goggles: http://www.nghobbies.com/cart/index.php?main_page=index&cPath=1_10_188|
Well, every serious racer should have most of these parts in his travel case already 🙂 If not, click on the links above to purchase them from us.
The first step would be to add to remove the existing 5.8Ghz RF module from your goggles and add the 3M tape to the front. You might have to cut it a bit shorter, so only the flat portion of the goggles is affected – just like in the picture below:
You can click on any of the images to see the larger version. The for the second step install the other side of the 3M tape on the back of the diversity receiver, and install the antennas with right angel connectors. In case you use other types of antennas and you would like to mount them with a semi flexible SMA female to SMA male cable, you can find a 5cm or 10cm version here: http://www.nghobbies.com/cart/index.php?main_page=index&cPath=1_10_39_140, look for the semi flexible ones. Once those are bent will stay bent. Here is the diversity receiver prepared:
Now all we need to do is to prepare the cable to connect the battery to it and power both, goggles and diversity receiver from the same 1800mAh Fatshark battery. You can find this new high capacity battery here: http://www.nghobbies.com/cart/index.php?main_page=product_info&cPath=1_170_172&products_id=1318. I do not show the process of making the cable, you guys – if you built your own quads, you will know how to splice a cable and add a connector to it. Make sure red is going to the middle and black is going to the outer shell – that is the ground. Other than that, once finishes, you can ziptie the power cable together with the 30cm AV to AV cable. See the below pictures for reference:
Once the cable is finished – I do recommend verifying the cable with a multi-meter to make sure all connections are continuous and nothing is shorted – then you can start plugging things in. First push the Diversity Duo receiver onto the front of the goggles possibly in a low position like on the picture below, this will eliminate most of the pulling torque to pull the goggles off your face. You might need to tighten the strap of the goggles around your head a bit to make it stay in position comfortably:
Congratulation! All you need now is to go flying with your brand new Super Diversity Fatshark goggles! for sure people on the field will like your portable diversity setup – while they are tied to a pole with their diversity system.