radio glitch with high capacity batterys

[Matt]

yo. id like to hear what the members of this forum think about this problem:

ive recently purchased a Sanyo 3000 and a GP 3300 battery, these are the high volt, high capacity packs. high quality stuff.

when i run the car on these packs, i have about 20 meters range and then the car glitches. the motor and steering glitch until i bring the car within 20 meters (estimated).

when i pop in an old venom racing pack (pretty standard kinda pack) the car is fine, long range, and no glitch.

my checklist:
replaced electronic speed control to a novak unit
changed receiver
changed motor
installed schottky diodes on motor terminals
tried mounting receiver sideways to get crystal away from the battery.
havent changed steering servo

im out of ideas. crap battery is fine, high powered battery shortens the range!

any help and suggestions would be really, really appreciated because im out of ideas and theorys

matto.

[justo316]

Maybe higher power batts are pushing your motor harder and producing more arcing which might cause more interference? Is the motor new (how are the brushes and springs)?

[BALISTC]

http://www.rchobbies.org/cars_stop-radio-glitching.htm

[toxxic]

Same Rc_King, Can be abit funny sometimes...

[Matt]

ive had some success in weeding out the glitch and i now have some range when using the high power/capacity batterys.

balistc, the link to the guide you posted is GOLD !clap

can i say that i have spent many many hours diagnosing and fault finding this problem over the weekend just gone. the final things that fixed the range problem were:

1) added schottky diode to the motor. this is more of an advantage to the electronic speed controller but every bit helps.

2) re-routed arial to enter the arial tube/pipe by a slit in the side of the pipe, rather then under the chassis and back up through the tube.

3) applied 2 layers of double sided tape under the receiver to lift it off the chassis to reduce it being hit with vibrations.

4) extended entire length of arial outside of the car. previously the arial excess/slack was looped under the steering servo wire.

all these put together means i have some good range with high capacity batterys and all on a 29meg AM radio.

[Matt]

i did it so that only 2 centimeters of arial was poking out of the tube, i like my shit neat <smirk> and this meant looping the slack under the steering servo wire. it mustve caused dramas because removing that loop of wire has helped it dramatically. it does mean i have about 8 centimeters of wire sticking out now but such is life.