sorry for namemisspelling Wolfram, well i send a patch last week, for bttv.h: i added #define BTTV_AVERTV771 0x79
and in bttv-cards.c: i added nearly the same as you did. i also had an init code for the mt352 which resetted the chip, but tuning failed because of missing documentation. i couldn't test svhs but with the same settings it should work i think, but that's not very important to me. ok, thats for now. cheers