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Re: LF: VLF6 (audio stream) temporarily off

To: [email protected]
Subject: Re: LF: VLF6 (audio stream) temporarily off
From: DK7FC <[email protected]>
Date: Sat, 27 Jan 2018 14:27:42 +0100
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Hello Wolf,

Thanks for keeping your system available. It is one of the few available VLF RX stations that provide a stream, very important, together with Pauls work to make use of it. I want to provide a stream as well in some time. I already ordered a 2nd octo soundcard for the Raspi, so i can provide the 3-axis stream some day.

Am 27.01.2018 10:36, schrieb Wolfgang Büscher:
In the meantime, one of my last J310's has been salvaged from a 70 cm RX preamp, and installed in VLF6.
The right priority, that's fine!!
Hope it will pick up something below 1 kHz from you one fine day ;-)
Not even one wavelength between us :-)
I wanted to improve the setup yesterday evening but it was only raining :-((
Today the city it overcast and foggy but the tree came back! It is 300 m higher than the city. So it seems the sun is shing up there. Fascinating!!

24 mA so far on 970 Hz. Today i want to improve it so i can run 36 mA (12 kV). That will be enough for the 40 km distance i hope...

73, Stefan




73,
  Wolf .

On 23.01.2018 13:45, DK7FC wrote:
http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/J310.jpg

They have been quite cheap ( ~ 0.6 EUR) just a few (< 5) years ago. Now they are not available any more. Looks like it is good to invest in such parts before they are not availble any more.

On the other side, the SMD parts can be used as well, just a bit more effort. Like the BF862, http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/BF862.jpg

73, Stefan


Am 22.01.2018 18:08, schrieb Wolfgang Büscher:
Greetings all,


Storm "Friederike" has taken her toll - the enclosure of my VLF6 had a small crack, so water slowly crept in, which slowly killed the high impedance input. It's in for repair now. Hope the FETs survived - I'm slowly running out of stock of these ancient J310 devices.

Hope to be back soon.
Cheers,
  Wolf DL4YHF .





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