Interesting, 11.7Hz is barely visible here today. I shall take some
computer fans outside and run them on 12 Volts near my E-probe.
Eddie
On 09/05/2011 10:36, Daniele Tincani wrote:
I have found that a PWM Fan Controller (like the ADM1031
from Analog Devices) can use 11.7 Hz as the PWM frequency
driving the fan. I suspect that in my case the 11.7 Hz signal
come from inside my PC.
Regards
Daniele
From:
Daniele Tincani <[email protected]>
To:
[email protected]
Sent: Mon,
May 9, 2011 11:12:13 AM
Subject:
Re: ELF: ZEVS transmitting from 0800UTC
Hi Eddie,
I didn't realize you are the author of the web page
that I mentioned in my message below :-)
My compliments also for the very nice grabber page.
Regards
D.
From:
qrss <[email protected]>
To:
[email protected]
Sent:
Mon, May 9, 2011 10:45:21 AM
Subject:
Re: ELF: ZEVS transmitting from 0800UTC
Hi Daniele / Chris et al
I will take a good look at the ZEVS breakfast code in
moment, I have a burst of noise covering the start
bit.
OK on the 11.7Hz Daniele, I will take a close look
there too to try and establish if it is a received
signal. These cariers are too stable to be from local
devices I think.
73 Eddie G3ZJO
On 09/05/2011 09:30, Daniele Tincani wrote:
Hello Chris,
I have no doubt that that 11.7Hz-spaced
lines on my SpecLab screen have a local origin.
I am just curious about their source.
Following web page
http://g3zjo-radio.blog.co.uk/ mentions 11.7Hz
as one of ELF carriers visibile at the author's
location ( "At my urban location there are
several carriers visible, 5.9Hz,8.8Hz,11.7Hz,16Hz,
23Hz and 32Hz") but it does not tell
anything about the possible origin.
Regards
D.
From:
Chris Dillon <[email protected]>
To:
[email protected]
Sent:
Mon, May 9, 2011 10:17:22 AM
Subject:
ELF: ZEVS transmitting from 0800UTC
Hi all - ZEVS transmitting on schedule from
0800 UTC this morning.
Eddie, Daniele - I don't have an 80Hz carrier
here at IO92vf. I'll look out for the others.
Chris
On 08/05/2011 23:52, qrss wrote:
Sorry Daniele no idea
1.7Hz and multiples.
Both Stefan and I have an 80Hz constant
carrier, I am also pretty sure about 16Hz
32Hz and 64Hz being received signals.
Perhaps the growing band of listeners can
confirm these as also received elsewhere.
Eddie
On 08/05/2011 23:40, Daniele Tincani wrote:
I see a constant trace at 82Hz, but
it appears to be 7 x 11.7Hz, as I see
other similar traces at 6 x 11.7Hz
(70.28Hz) and 8 x 11.7Hz (93.72Hz),
etc. Does anyone know about a possible
origin of these 11.7Hz-spaced carriers
(or harmonics)?
Regards
Daniele
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