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The package I bought came with two receivers but no servo, which suited me just fine.
The features include: 2.4Ghz technology digital trims and sub trims Steering dual rate End point adjustments Exponential rates Steering and throttle speed adjustments ABS 5-position 3rd channel 7 model memory with model-naming and copying |
| My old Sanwa receiver on the left, the KO KR-407S receiver on the right. |
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I weighed the transmitter. |
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Then I weighed my old transmitter (Sanwa MX-3). |
| Two buttons on the pistol-grip gives quick access to the steering TRV (dual rate) and 3rd channel. |
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The 3rd channel has 5 positions that can each be trimmed through LCD menus. This is invaluable for rock crawlers that run a dig unit, or
for gear-changes on some nitro trucks. The small display necessitates many button presses to navigate through the elaborate menus to reach the wide range of features. |
| On my unit, if you set the steering EPA to 100 and casually pull the steering to one side, it goes to 98. You have to conciously put some effort into cranking the wheel to get it to go the extra 2 percent. Letting the wheel go, it usually goes back to zero but once in awhile, it stops at 1 percent left or right. Although not perfect, I consider this quite precise for a transmitter of this price range. |
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My only real gripe is that the transmitter did not have a plug for a rechargeable battery pack (like a LiPo battery). I'm reduced to using rechargeable AA batteries for the moment. |
| A friend on mine soldered a battery plug to the original electrical contact tabs so he could run a Lipo pack on his EX-5UR. Now THAT's a light transmitter. |
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At the big TITC 2008 race in Bangkok, many drivers running high end KO Propo 2.4Ghz systems reportedly suffered from glitches. There's no word on whether this issue had been resolved before the release of the EX-5UR. I have not attended an international event with it, but the races I take it to usually have over forty participants mostly on 2.4Ghz transmitters of one sort or another with no radio impound. To add to that count, the offroad track usually stays open when a race is being held on the on-road track, so there's about a dozen or so other guys turning their transmitters on and off nearby. I have not experienced a glitch with the EX-5UR so far.
Update (22 November 2011): I've been using the EX-5UR for 3 years now in various conditions and it has never skipped a beat.
Pros:
Low price
Lightweight transmitter
KO's fastest response to date (Ultra)
Tiny receiver
Extra receiver package option
7-named model memory
Adjustable 5-position 3rd channel
Cons:
No pre-installed option to plug in a rechargeable battery pack (but nothing a little modding wouldn't fix).
Conclusion: If you're on a budget and need a 2.4Ghz system or need a useful 3rd channel to run a crawler dig, then this is the system for you.