YOU may wish to review the posting I have made in the Hitec Radio Support forum concerning a discovery I made today. MORE details.

Got caught at field without my box of basic slave transmitters and proceeded to use my Hitec Prism 7 with Spectra for a buddy box to instruct a Futaba Master.

Thankfully we found early that in the SLAVE position, without battery, the Prism 7 bleeds Master Radio battery to operate computer and TRANSMITS on the SPECTRA frequency.[:@][X(]

Had to remove Spectra module. Bad News. Be careful out there.