If your radio "hits" are due to EMI/RFI interference originating on the model (metal-to-metal noise, gasser ignition noise, local R/C equip noise, etc.) then this is not a
SC vs.
DC receiver issue.
DC Rx's offer good immunity to
intermodulation troubles, but these are entirely different animals. However, JR's Rx's have circuitry to minimize these issues. IM is discussed here:
http://www.uoguelph.ca/~antoon/hobby/rip.htm
If your interference is nearly constant, rather than intermittent, then it may be IM, 2IM, or 3IM. If severe, these troubles will affect DC Rx's and JR's ABC&W equipped SC Rx's. There are solutions to minimizing these affects, including such things as observing proper pilot spacing and avoiding certain R/C channels when local TV chnl 4 is in use.
By chance have you identified the interference? That is the best place to start. Then a recovery plan can be devised. Of course going to PCM will
mask EMI/RFI interference problems, but that is a whole 'nother subject in itself.