Originally Posted by
zixxerluv
Hoping for some "fix-ya" advice.
I bought a used Ko Propo EX-10 Helios which came with a Spektrum SR3001 Pro receiver and SM1001 Pro transmitter module. It browns out at the worst times! On the straight away, out of turns, prior to a jump, during a jump when flight attitude needs adjustment.... pretty much all the effen time!
Sometimes, the problem does not show itself at all, for short periods of time.
I'm using a Savox 1267 servo, and I have a Castle BEC properly installed to prevent glitching. I'm also using Castle MMP with 3800kv motor. I use the Castle Link to program the esc.
Is this particular Spektrum equipment unreliable? Is there a fix for it? The antenna has been relocated (by the previous owner) from the side of the Tx module to the top of the controller.
I'll be willing to refit the controller with Ko Propo equipment, but that'll cost $200.
What other Rx/Tx modules are compatible that may not cost as much as Ko Propo?
Any comments and feedback are greatly appreciated!
I have a fair amount of experience with the MMP (albeit the 1-cell version) with 3800 4-pole Trinity motors. My data logs show that they can draw enough amperage to max out the MMP. With that being said, it's possible that a contributing factor to your brown-outs is that the battery voltage is sagging enough to cause the receiver issues. This seems likely as in your description you state that the brown-outs happen at all times, which means that the servo isn't necessarily the issue. What do you have the BEC voltage set to?
Originally Posted by
Odin544
Get a better radio or get rid of the Savox. Problem solved. Savox are one of the most power hungry servos you can get. That and their QC sucks, so sometimes you get one that works great and doesn't draw a huge amount of power and other times you get a crappy one. Its a roll of the dice, and the price reflects that. Also my understanding is the older 2.4 modules compound the problem.
Do you have any data to support this? All of mine shows that they don't draw much. Another forum member showed, using an oscilloscope, that they do draw aggressively at the start. For reference I have attached logs for a 1258 and 2271.
