Citizen, the Japanese watches maker, offered a passive (without batteries) "enhancer" for their AT series, IIRC was a ferrite block where to put the watch, I th

Citizen, the Japanese watches maker, offered a passive (without batteries) "enhancer" for their AT series, IIRC was a ferrite block where to put the watch, I think I've seen a photo. Or one can use a PC to transmit the DCF77 signal locally (it could be illegal) to a clock using a pair of headphones, I've seen at least a couple of examples but never tried them. Edit: found the photo http://forums.watchuseek.com/f17/possible-method-improve-atomic-time-syncing-1305322-2.html#post10570034 http://forums.watchuseek.com/f17/possible-method-improve-ato...