The air core loop may well be suggested because the incremental permeability of the ferrite, hence the inductance, varies with temperature.
-John ============= [snip] Interestingly a lot of the modern LF and > VLF > Off-air Standards use ferrite rod antennas and there are known problems > with > those, Quartzlock advise a air loop for critical requirements. > > Alan G3NYK _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
