I have a JR 8103 8 channel PCM radio and i want to use a 6V receiver pack instead of 4.8V. Can i do this?

Primarily this is to solve some problems related to the hall effect RPM sensor in my turbine control unit. Apparently if the current draw gets too high due to the high number of servo's, the voltage gets unstable and/or drops causing the RPM sensor for the turbine to fail.
It will give me more servo power too.

I am running the radio in my turbine powered hotspot with the following servo's:

2 JR 8411's
2 Voltz thin line servo's
1 JR 3321 servo
3 JR 531 servo's


Any help would be appreciated


thanks


Jon Dahlgren