tbaus
Posts: 372
Joined: 2/1/2007 From: Georgetown,
TX, USA Status: offline
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RC1K, I have been looking into upgrading radios myself. This is what I found. The DX6 is a park flier radio, it's range is limited. For helis, the range is just fine, but just the same, it's range is limited. The DX6 has 3 point throttle and pitch curves. (limited) The DX7 is not range limited. The DX7 has 5 point throttle and pitch curves. DX6 and DX7 both utilize Spektrum's implementation of 2.4Ghz. ( utilizes 2or 3 frequencies to fight interference) Futaba 6EXH comes in either PCM/PPM ( FM) or Futaba's implementation of 2.4Ghz (They call it FASST.) (utilizes a bunch of frequencies that it shifts through) Futaba has a 5 point pitch curve. ( You don't actually see the picture of the curve on the Futaba, you just see numbers that represent the curve. DX6/7 you see the actual curve in the LCD display. Some people want to see the actual curve on the radio, not it's numeric representation.) A Futaba radio with PCM/PPM will work with your current receivers in most cases. All 2.4Ghz radios will not work with your current 72Mhz receivers. DX7 with 7000/7100 receivers are found right at the $300 price mark. DX7 radios ( no servos) with 6000/6100 can be found right at the $200+ price mark. Futaba 6EXH 2.4Ghz radios (no servos) can be found at the $190+ price mark. ( One seller from NY right here on RCU has this price.). To be perfectly honest, I did not research street prices on DX6, so I cannot be of much help there. Used Futaba PCM/PPM radios can be had right at the $100 price point. ( I bought one for $105 shipped, that is on it's way.) If you fly with a bunch of other people, and you don't mind throwing out your FM receivers, it seems 2.4Ghz is the way to go as the 2.4Ghz radios are not interfered by other radios. I did not find Spektrum DX7 or Futaba 2.4Ghz FASST used radios anywhere at a bargain. In a lot of cases, $10-$20 more would buy a brand-new radio. In some cases new radios could be had cheaper. ( You know, Ebay bidding frenzy.) Widespread problems: I did not find reports of widespread problems with Futaba 6EXH in either 2.4Ghz or 72Mhz. ( The usual 72Mhz interference issues are on the 72Hhz radio. If someone else turns on a radio on your frequency, you crash.) I found a British web site (yes, they fly with 2.4GHZ radios in the UK) where many heli fliers lamented losing thier heli with Spektrum DX7 radios. It seems the Spektrum receivers have some sort of binding issue if a voltage drop or brownout occurs. When the voltage drops below a certain threshold, lockout occurs and the receiver goes to it's preset fail-safe setting. Spektrum has created a software patch for the problem and will install the patch for free. All you have to do is send in your reciever. Some fliers report still losing their heli after the software patch. The problem seems to be most prevalent with 6000/6100 receivers, ( they are tiny and light ,so lots of heli fliers use them) but has been reported with 7000/7100 receivers. When patched, Spektrum puts some sort of sticker on the receiver. I have read accounts where Spektrum owners say this is not a |