[time-nuts] WWVB relative field strength graph

[paul swed]

I took a look and as it says its relative. Don't think there is a trusted
relationship.
Good to hear you have everything going. I believe outside is important not
so sure huge height much matters at 60Khz. I ran at the 45 level on a tower
for years and have to say 6 foot in the woods seems to operate just as well
given the propagation variation every day.
You may not need it but I have a number of wwvb rcvrs so I built an active
splitter to feed up to 6 units. Essentially single opamp in to 6 buffer
amps. Stupid simple.
Regards
Paul
WB8TSL

On Thu, Apr 12, 2012 at 1:51 PM, Jim Hickstein <jxh at jxh.com> wrote:

> Over at http://tf.nist.gov/tf-cgi/**wwvbmonitor_e.cgi<http://tf.nist.gov/tf-cgi/wwvbmonitor_e.cgi>there is a "relative field strength" plot for each of the monitoring
> stations.  I'm trying to correlate LaCrosse with my own measurements in St.
> Paul (AGC voltage in my Spectracom 8164) and it's very bothersome that this
> graph has no scale and no origin.  The unit is said to be uV/m.  Does
> anyone here happen to know what the evident top rail value is?  It often
> hits it during the dark-path period.  And the magnitude of a vertical tick?
>  I suppose it's logarithmic.
>
> The 8164 manual says that AGC 2.0V corresponds to 100uV/m at a properly
> oriented antenna.
>
> I got both the 8170 and the 8164 going last night, after finding the other
> 8206 antenna[1], still mounted in the attic of the garage.  So I have one
> outdoors (in the back yard, up 10 feet on a PVC pipe), but with a long and
> maybe lossy feed line, and the other one nearby but indoors.  Today they
> both seem quite happy (AGC 1.3V), even though LaCrosse is "unreadable".
>
> [1] "Engine #3 found on right wing after brief search."
>
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