Sean Thomas & David Thanks for your response. Does the noise immunity of digital signals still apply at radio frequencies? I was thinking of modems vs transievers. BTW It seems like the VBB that I set up about 10 months ago has reasonably stabilized. That is, the leaf spring is essentially not creeping slowly down. I haven't adjusted it in a month or better. I set up another one about 4 months ago. I'll see if it responds similarily. Regards Barry _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>