Gang, Swapped for a decent 75A-3 (one filter - 3.1 kcs) and got thinking... with that NBFM plug-in place, surely somebody out there has put in a good product detector. Anyone know if/where/when such plans may be? And of course if anyone has the spare 800 cycle filter (F455B 8something, I think) I'd like to hear from them. TIA 73, Al N5AIT