[Premium-Rx] Need 60Khz WWVB Antenna

[J. Forster]

Rodney Bunt wrote:

> For method 3 how many conductors is recomended ?

In the range of 10 to 30 turns. If you don't have any cable of that number in the junk box, you
could easily use 4 or 5 turns of 6 conductor. There are inductance formulas in an ARRL handbook, as
I remember. I don't have one handy right now. Anyway, it's not critical. The 1 M dimension is not at
all critical. It could easily be several meters on a side with fewer turns. The only consideration
is that you should be able to resonate it. BTW, you can use it untuned with lower gain and in that
case I'd choose the coil inductance to be roughly 50 ohms at the frequency of interest.

> How do you feed this to the receiver ? Do you add a couple o turns and then connect this winding
> to the Rx input ?

I just added a series resonating capacitor (trimmer) and connected the series combination of loop
and capacitor to the RG-58 feed line and the other end of the coax to the receiver. A ferrite common
mode choke is a good idea to reduce noise. I tuned mine for 100 kHz for Loran most recently. You can
tune the antenna trimmer combo easily with an audio generator & scope and adjust the peak for 60
KHz. The Q is pretty low.

> PS: would I have any chance of picking this up in Australia ? I have a Collins HF-2050 Rx which
> goes down to 10kHz ???

I don't know. I know at certain times of day, 60 KHz from the UK swamped the WWVB signal in Boston.
WWVB is pretty boring to listen to. If you want a standard frequency source, consider Loran.-J

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> Rodney
> VK2KTZ
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