Hi all, what tempco did we decide was the one to use in CAM VCO3D and EFM VCO4 Oscillators Looking at the Farnell catalogue I have a choice of: PTC 1K 9.0mW/deg C 0.25W 1K 5.0mW/deg C 0.17W NTC 1K They are too expensive to order them all :) TIA Cheers... Keith Winstanley http://home.freeuk.net/lowpass