Oh, I'm a bit late to this thread, but I also have a fairly old CF7+ with external power, which looks different from the one shown here. My version needs at least 7.5V, according to the seller. I've been using it with a 9V power supply for years now. You really need to make sure which version you have there.
uih, thats´s news.... do you have a VoltageRegulator VRM on your CF7 ? Did this ever exist ?
Is it possible to get 1 or 4 nice pics from your device, for the collection ?
Maybe from the power-supply too ? with imprints. Doesn´t matter if it is a universal one,
it´s just to have a fitting pic for the docu.
EDIT: ah yes RickyDean also wrote about the VRM
Edited by schmitzi, Tue Jan 12, 2016 6:57 AM.