[Boatanchors] OT: Guess I need a new clock for the shack, the old one's 'obsolete' :(

[McDonald, J Douglas]

I'm an SWL now, no longer a ham. I've got one of those Weather Channel brand indoor-outdoor 
clocks that receives from the outdoor tranmiitter somewhere in the 300 MHz area. It also 
has a WWVB clock which is very reliable. It never fails to sync at least a few times a day. 

I have no boatanchor VLF radios, none have come may way yet. But 
I wanted to get WWVB on a "radio". So I tried SDR radio. I have an Airspy and a HamItUp
upconverter (however,  one of those packaged four-diode balanced mixers and my 
synthesizer works even better). I wrote a program in Gnu Radio to demodulate both the
AM and PSK parts of WWVB. It works both with the Airspy (with a 30-450 kHz 12-pole
prefilter)  and also with the built-in microphone input of my computer (with a 
single high-Q tuned circuit). Most of the day WWVB comes in nicely with either 
a 25 foot antenna with active 6-kOhm inout impedance follower at the antenna, or 
a three foor diameter tuned loop antenna. I've not tried decoding the time signal.