Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz

[DK7FC <selberdenken@posteo.de>]

OK, all right.
It's a rainy day here and i'm winding coils all the time. Soon there 
will be a first version for 2.97 kHz, just a few kV but good for a first 
test. It's not easy at all to generate 10 kV at 2970 Hz on a 470 pF 
antenna!!
So i have the antenna available for a first ULF test in the coming days.
My VLF preamp has been repaired and is working better now, using an OP27 
at 5V DC! I looks like i'm now band noise limited at 5 kHz and maybe 
just a few dB are missed at 3 kHz.
73, Stefan

Am 05.06.2016 21:34, schrieb Paul Nicholson:
> 4uHz, a good result for equipment and propagation.
>
> We are struggling with the QRN.  A crazy time of year to be
> doing this.  Most days are quiet only between 04:00 and 12:00,
> just a few days recently offer a full 04:00 to 21:00.
>
> We should perhaps try to use this daytime window.
>
> Before suggesting further attempts I'd like to spend a bit
> more time measuring your recent signals.  I'd like to work
> out the chance of getting 20 chars across in 16 or 17 daylight
> hours.
>
> I haven't exhausted recordings of the 22nd and 25th, there's
> still measurements to pull out and things to try.
> --
> Paul Nicholson
> --