Servo Signal Booster (HS Boost) by Hitec
HS-20110524 HS-7940/7945/7950TH Jumping/Glitching
In some cases, when using the 7940/45/50s in applications that require a very long extension, they may randomly jump (glitch) when powered by 2S LiPo/Li-Ion batteries.
Although this may occur with many systems, it is most commonly found when using JR/Spektrum type RXs, especially the Power Safe versions.
We have discovered that due to the resistance in long extension wires, the signal voltage drops, thus causing the issue.
We recommend that only high-quality, twisted, 22-guage, high strand count, gold connector extensions be used.
In the event that this does not resolve the problem, there are a few options.
The use of a signal line booster like this it resolves the issue in almost all cases.
Another option is to solder a .22 tantalum capacitor between +/- on the extension.
These solutions are typically only needed when using Li-Po/Li-Ion batteries to lower the voltage below 7 volts and is not needed when using 5-cell NiCd/NiMH or LiFe batteries.
