[time-nuts] Re: WWVB Loopstick Antenna Project

[jeanmichel.friedt at femto-st.fr]

> Seek a rod that is good at the 125kHz RFID frequency. Type material 78 
> comes to mind,  but almost any Manganese Zinc Ferrite is going to work.
> 
> Although they'll probably be fairly small . All the higher frequency 
> rods will be fine on losses but have low perm and need lots of turns. 
> Something with an initial permeability of at least 2000 will be suitable.

I used a spare
https://fr.aliexpress.com/item/1005004383694303.html (actually 
https://www.conrad.fr/p/platine-de-reception-dcf-641138-pour-serie-c-control-641138
but more expensive than the Chinese version) when assembling 
http://jmfriedt.free.fr/agu_dcf77.pdf (see Fig 2 taken from 
https://www.qsl.net/dl4yhf/dcf77_osc/index.html: 60 or 77.5 kHz
will not make much of a difference).

Best, Jean-Michel