3 ms·

I've found that antenna orientation matters, even in the Netherlands which is much closer to DCF77 (concrete house).

• c3833174 9y ago
  Yes, it needs to be perpendicular to the direction of frankfurt for best results You can find more details in the second page of this datasheet https://www.gemischtwaren-haendler.de/shopdateien/3942_1.pdf https://www.gemischtwaren-haendler.de/shopdateien/3942_1.pdf
  • gpvos 9y ago
    More importantly, you would need to know how the antenna is oriented within the enclosure of your clock. I'm pretty sure that that wasn't mentioned in the manual of the one I bought.
    • c3833174 9y ago
      Most clocks are thin, so it's easier to guess the placement of the antenna.
    • Piskvorrr 9y ago
      Usually the antenna is parallel to the board - and the board is positioned in the largest dimension, which tends to be also parallel with the display.
• IronBacon 9y ago
  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...