On 27 November 2012 09:15, David Kirkby <[email protected]> wrote: > If I was reallly concerned, then I'd look at using an optical > interace. Use a battery to power the GPS antenna, modulate a laser and > detect the RF on a photodiode connected by a metre of so of optical > fibre.
Of course, I mean detect the RF modulated light on a photodiode. An optical interface is I believe the best you can do. I would certainly not trust "surge protectors" on this sort of thing. But a band-pass filter would do a pretty decent job, as there will be very little RF at those frequencies from lightning. I did once used to know the frequency range of EMP and ligthning, and whilst I can't remember them now, it is well below 1.6 GHz where there is significant energy. Dave _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
