3 ms·
Very nice work! Can you receive WWVB via a larger, resonant loop antenna; say a 10 cm diameter solenoid and resonating capacitor? If so, you may be able to pl
by madengr 10y ago
Very nice work! Can you receive WWVB via a larger, resonant loop antenna; say a 10 cm diameter solenoid and resonating capacitor? If so, you may be able to place the watch at the center of the resonator (i.e. within the solenoid) so it parasitically couples.
The antenna gain will be proportional to area, so much more gain than that of a watch antenna.
- anishathalye 10y agoOh, that's a neat idea! Yeah, I think I should be able to receive WWVB in my dorm room via a larger antenna. I should try it when I'm back in my dorm room after the winter break.
- madengr 10y agoMaybe build one with a short piece of large diameter PVC pipe as the coil form. Use a signal generator at 60 kHz to drive a smaller, transmit probe coil. Then another receive probe coil hooked to an oscilloscope. Use this loose magnetic coupling technique to tune the large coil for resonance. You'll of course want to shoot for as high of Q as possible, but that's an engineering trade off of AC wire resistance, capacitor Q, etc. Go for as large of inductance as feasible, until your self resonance is just above 60 kHz, then pull it to down on frequency with a silver mica cap, or adjustable air variable cap.