[time-nuts] WWVB BPSK Receiver Project? (fwd)

[gary]

I lost track of who wrote this, but why is it assume a ferrite rod has 
non-linear phase. [Group delay error I presume). Now I assume this 
presumes the rod is used in a LC circuit, but if the Q is not high, the 
phase linearity won't necessarily be bad.

Basically I'd like to hear more from whomever wrote this.


"The useful bandwidth of LF to HF radio is about 9kHz, DCF77-like 
standards with PRBS is about 1.5kHz. Of course the ferrite rod as an 
input filter *will* have a non-linear phase, but it still seems to me it 
is the simplest and most common receiptor for LF time signals."