Propnut

Yes the installation of the hack module is very easy HOWEVER if doing it on a JR set one MUST switch both the PPM and the positive feed in order to totally isolate the modules from one another. If you don't you will end up with a floating ground. Thus far I have done the PCM9XII as in my original post, a JR-378 and a JR-3810 and had the same problem on all three. Hence why I used a DPDT switch rather than a SPDT. On all other radios you just need to isolate the +VE and have the PPM common between both modules. and can use a SPDT. FrSky is without question the best of the aftermarket 2.4Ghz solution (perhaps maybe the best overall). For anyone looking for a really cheap 2.4Ghz solution however seriously consider the Flsky 9X radio, also sold as the Turnigy 9X V2, IMAX 9X and EURGLE 9X. All are the exact same radio. The software on the radio's from the factory is "OK", but with a bit of soldering the radio's can be modded to accept an open source firmware that totally transforms it. Whether one mods it or not the 2.4Ghz receivers are dirt cheap at around £6-£9 depending on whether you want 6 or 8 channels. Only downside is they have no real failsafe although one can use really cheap £3 R/C Car failsafes that work extremely well. The reality is that the range of the receivers is well beyond normal flying range so F/S is only really something to worry about if you are a particularly nervous sort or you have a very expensive model. My JR PCM9X2 is my main radio but I do own two of the above mentioned radios, one Turnigy and the other a FlySky which I bought to buddy with my son. The were dirt cheap at +- £45 each so for £90 I got two 8 channel fully computerised sets that at the price I really don't care if they get busted. I did change the software on both as it truly does open up a whole new world of programming and capabilities (and because I am a bit of a geek ) Edited By Propnut on 16/12/2012 22:20:34 Edited By Propnut on 16/12/2012 22:21:45

I fly both as like most I have a large investment in 35Mhz equipment but needed 2.4Ghz for my large and electrically noisy Electric models. Now in my case rather than take two radio to the field I converted my JR PCM9X2 to use both 2.4Ghz and 35 without having to change modules. I did this by retaining the 35Mhz module in place and installing an FrSky 2.4Ghz Hack module within the radio. I use a DPDT switch to change between bands. Works very well but just have to make 100% sure that I remember to extend the aerial when flying 35Mhz. Most of my 35Mhz receivers are the Corona Synthesised units as, although they are PPM, they have failsafe on every channel. Also their noise rejection is second to none including when compared to my JR RS77S synthesised units. My biggest fear with using 35Mhz is the number of people using it on cars and boats. I recently sold 2 35Mhz sets on eBay both of which went to people intending to use them for ground based models. Of course I made them aware that this was illegal but both said they didn't care.