kb...@n1k.org said:
> If the transformer works well up to 600Hz, isn???t that high enough to capture
> anything that actually is grid related (as opposed to local to your home /
> neighborhood )?
What's the frequency response of the transformer
on the pole outside my house
at the nearby
I was aware of the Tonga erruption, although not generally into seismology, but
wonder if this might
be of interest.
https://www.qsl.net/rf-seismograph/
A project to add computer demodulation to a variety of commercial
receivers/transceivers eventually morphed
into an ongoing
A transformer may distort the waveform but that distortion should be
constant, whereas a person monitoring line voltage at a particular location
will be looking for changes with time. Effects of the transformer could be
ignored, in that case.
On Sun, Jan 23, 2022 at 8:33 AM Bob kb8tq wrote:
>
Hi
On a similar note:
If the transformer works well up to 600Hz, isn’t that high enough to capture
anything that actually is grid related (as opposed to local to your home /
neighborhood )?
One could easily argue that the other end is the pinch point. There may well
be interesting things
But do you want to measure anything other than mains frequency? IF not,
waveform distortion in immaterial.
Or am I missing something here?
My mains monitor uses an old wall wart with 9V rectified but unregulated DC
out - 5V regulator on the display board. I added an extra wire to one side
of
On 23/01/2022 08:30, time-nuts-requ...@lists.febo.com wrote:
Stick with the transformer. The use of a capacitive divider is predicated on
the line waveform always being a sine wave. Dream on! All it takes is one good
spike down the line, maybe only 20-30V amplitude, and your capacitive divider
A thought has just crossed my mind, not sure if the idea is valid or not. The
idea is to re-purpose (parts of a) PLC network adapter. At the very least they
can be a source of line voltage rated parts I'd think.
But the low frequency characteristics make me wonder in this context, as PLC is
in
