Testing CMA-77-100 antenna with SYM-RFT-77 DCF77 receiver module
Michail Papadimitriou is in the process of developing a Nixie clock which will synchronize with the DCF77 time signal. These standard time signals are transmitted on 77.5 kHz from Germany, and Michail intends to use a DCF77 Time Receiver Module, like SYM-RFT-77 to demodulate the signal. Basically, this module receives the time standard signal and outputs a high pulse at precise one second intervals. The trick is being able to receive the VLF signal with sufficient strength and clarity to be read by the module. Michail experimented with various 77.5 kHz antennas and wrote this small review about testing the CMA-77-100 antenna with the SYM-RFT-77 DCF77 receiver module.
(If you’re really into antenna design for DCF77, check out this explanation of VLF antenna design theory from C-MAX time solutions, manufacturers of the CMA-77-100 antenna.)
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