If you're into receiving low frequency time signals, you can receive them directly with nothing more than a piece of wire connected to the mic input of a modern sound card (via a capacitor). Sample at 192kHz and downsample in software (simplest: mix with a similiar frequency sine and listen to the result, say 59kHz for WWVB or MSF).
The 2024 version of the crystal radio. :-D
are there any good circuits for radio transmitter (circuit for low freq esp 60KHz)
Really just a piece of wire? I would have thought that there would be too much noise to pick up WWVB without a somewhat more selective antenna (loopstick maybe?)