deadstick8409

My Feedback: (2)

Hi All,
Just getting back into the hobby after a 15 year break.
I of course had to update everything, Convert my micro pro to 2.4, new batteries for everthing, and get into electrics!
I have a G38 powered prime stick, and I use two switchs in it to power the radio, from one pack.
Now, after reading SO much about 2.4 troubles (real or imagined), I wish to set up the stick (which has a couple huge servos for tail feathers and some fairly powerful ones in the wings - can't really remember what they are- but decent ones from back then) to be reliable as possible.

To that end, I was thinking maybe a couple of the LiFe packs, and a diode right before they went into the spektrum 7ch reciever. Each would have their own switch, so a bit of redundancy there. The diode would isolate the packs from each other, and provide a .7 volt drop which may be handy as I remember the giant servos would twitch on a 5 cell nicad pack sometimes. The diode would be a heavy duty 25 or 50 amp one.

Is this a common thing to do, or am I over thinking it? The isolation Ithought would be nice if one pack had a better charge than the other, or if for some reason one shorted internally.

Flying Geezer

My Feedback: (14)

The diodes are unnecessary.

deadstick8409

My Feedback: (2)

Even though the servos get twitchy at the higher voltage?

Flying Geezer

My Feedback: (14)

I have had not twitchy servos with A123's. A 5 cell NiMh pack will be a little twitchy at first and then settle down before you can tune the engine and taxi.

With a123's I have not even had this problem. Adding the diodes also give you another point of failure. There are many of us using them straight up with no problems.

fizzwater2

My Feedback: (61)

deadstick - how old are the servos? While newer ones might not be twitchy at higher voltages, older ones might be.

fizzwater2

My Feedback: (61)

deadstick - how old are the servos? While newer ones might not be twitchy at higher voltages, older ones might be.

deadstick8409

My Feedback: (2)

I am guessing they are at least 15 years old. Just getting back into the hobby.
I got bigger problems. Just had my micropro updated to 2.4, and then put the battery in backwards! Nice smoke show.

fizzwater2

My Feedback: (61)

ouch, that hurts... sorry to hear that. While I haven't used my micropro in quite a few years, it was a pretty neat radio back when I got it.

snuts

Sorry to hear that! The other option is to cut a diode in the servo leads on the older servos. Leaving the full voltage for the AR7000.
-Snuts-

deadstick8409

My Feedback: (2)

Snuts, an excellent idea, thank you. The old connectors need need chopping off anyway!