My video Rx is one of the Lawmate receivers with the saw filter installed. I think I'd rather just hang it off of the back of my radio. The antenna should be pointed straight up, correct? Also, when I have it plugged into the back of my Futaba 7C, that disables the 2.4GHz the radio normally puts out, right? I ordered some of the clips from RMRC to attach it to my radio handle, but the clips are nowhere near big enough. They were only a dollar or so. Anybody have any ideas for hanging it off of my radio handle so that it's easy to remove?
Mounting your UHF transmitter next to your 1.3ghz video rx is probably a bad idea. The UHF tx puts out a good amount of power and will swamp your receiver. Results will be major video interference and decreased range. I've heard you can also damage sensitive electronics found in certain rx's. I fly with 1.3 and EzUHF. Grab a 25' or 35' RCA extension for your goggles (monoprice.com) and keep that distance from your GS while flying to avoid UHF interference. Both of my RX's (RangeVideo and RMRC) have problems if the UHF tx comes within 25' of them. RE: Futaba disabling 2.4 when UHF is attached, -some people open their radio up and manually unplug it, some throw in an external switch to toggle between UHF and whatever frequency its on, some don't care and it works fine. I used a frequency counter to verify the FM was off on my 9CAP.
I would not have a problem with 72mhz it could do 4km no problem. I would never trust my plane to spektrum. As for Frsky I own it and have flown to 1.5km no problem. I have heard guys flying to 2.5 and even further, I would not try it without a rth system on your plane. I would not buy the 1 watt wifi booster. I've heard to many guys where the booster fails and they lose there plane.
For the flying I do 72mhz is fine. The only reason I got a Rangelink uhf is that I was worried that someone would switch on there radio and be on my channel. I am not worried at our club but at a distance of 5km you never know what will happen.
Forget about spectrum. Lots of people are using FrSky successfully for nearby FPV (2-5km). As soon as you go past that barrier, I would go with a LRS. There is a lot of fun to have before going long range in FPV.
72 mhz is a great way to start, and if your lucky enough to own a Futaba 9cap you can just transition to LRS when your ready to make the investment. I have had been out 1.5 miles more times than I can count and up to 2 miles before I lost my nerve. Just be careful to remember that once your out a mile you don't want to be 10 ft off the deck with 72 mHz, its the only time I experienced a fail safe.