Hello Chris, Gerhard, ELF,
I've also seen a stable trace at 82 Hz but not the frequency shifting
transmission before. For some reasons there are various QRM levels here
and i don't know the origin. Never mind and interesting to see something
at all. Would be interesting to see what can be achieved with an ELF
optimised crcuit...
My SL settings include a 700 Hz LPF and the noiseblanker afterwards,
using the usual VLF settings. The width of one FFT bin is at 11 mHz and
the scroll rate is 1 pix/minute which seems to be a bit to slow. I will
change to 30 sec/pix soon. I've switched on the "Paul Nicholsons hum
filter" and set the hum frequency to 16 2/3 Hz to remove 50 Hz and 16
2/3 Hz harmonics of the German train power grid.
Maybe a simple mains transformer allows a simple way to realise a LPF?
73, Stefan/DK7FC
Am 08.05.2011 22:57, schrieb Gerhard Hickl:
Hi Chris, LF!
Very interesting....I'm also using Stefan's E-probe and on 9khz ist's
very sensitive. My probe is more than 15m above ground and I'm also
trying to receive the ZEVS-transmissions. I have the window running
since a few days but nothing on screen here in JN88hl....
I'm just using a low-pass filter with 1000Hz -3db point and the
noise-blanker afterwards. I wonder about your SL-settings.
73
OE3GHB
Gerhard
Am Sonntag, den 08.05.2011, 18:58 +0100 schrieb Chris Dillon:
Hi all - ZEVS transmission starting at 1800 BST received at IO92vf
using a 'Stefan' pre-amp with a 1m probe about 3m high.
Still transmitting a constant carrier on 82 Hz at 1857 BST. Wonder if
they QSL reception reports?!
73 Chris G3WCD
On 08/05/2011 09:37, qrss wrote:
Stefan / LF
Message commenced 0800UTC.
Eddie
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