DCF-77 on a Selective Level Meter W&G SPM-15
Here is an example of how to use a selective voltmeter (Wandel & Goltermann SPM-15) as a VLF receiver.
The antenna was a simple random wire (16 meters in inverted "L" configuration).
This reception was made in the afternoon al 14:20 UTC.
In the night it is very easy to listen to 630 meters band.
It has an in built signal generator that can be used to drive a simple power amplifier for 472-479 KHz.
73, Mimmo - IZ0GIF - http://www.iz0gif.it/