Hi Stefan,
I built the VLF E-probe designed by DK7FC. Your design seems to work well
on 8.277 kHz. There is also a VLF preamp in the shack.
73
Joe
On Thu, 29 Dec 2016, DK7FC wrote:
BTW Joe,
Would you set up a VLF grabber / monitoring station on your side to receive
signals from DL? It is a bit easier i think, no pilot tones and such stuff.
Direct reception with a simple soundcard. You will however need to build a
preamp and low pass filters and such stuff...
73, Stefan
Am 28.12.2016 21:59, schrieb DK7FC:
Am 28.12.2016 19:00, schrieb [email protected]:
PS Stefan's coil is very compact. 0,4 mm wire? Hope it can take the kV!
Hi Joe,
Yes, 0.4mm wire. The voltage is not the problem for the wire. But the tube
is out of PVC and the length of the winding is about 0.3m. So it will be
about 1kV/cm which could be problematic if the inner side of the tube
becomes wet, inhomogeneous wet. This could cause strong local E field
strength which leads to arcing on the surface. Arcing on the surface makes
the surface conductive, a self accelerating process that can be repaired.
This is the high risk of this construction! It has its advantages and
disadvantages. It will handle 700 mA RF current, at least now in winter :-)
But i should take care to keep it as dry as possible. We will see what
happens.
73, Stefan
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