Hi Joe,
Am 10.03.2017 19:34, schrieb [email protected]:
Hi Stefan,
The next DX I hope will be VO1NA/p at 5.7 km at least with Spectrumlab.
In which mode / bandwidth? QRSS-3 should work in that distance, the far
field border :-)
I was guessing that you could send audible VLF CW much farther than you
could run, but it seems we can both run greater distances than we can
send! You should be able to hear your sigs at >3.5 km. My best
dx is 2.7 km.
I'm receiving with a loop and am transmitting with a inv-L. This is not
optimal in 3.5 km distance. I'm already arranging things for a E field
receiver there. First tests were done a few days ago. It is for my 970
Hz experiments...
It might be an idea to make sure your coil cover doesn't get hot.
PVC can absorb RF and I recall Jack VE2CV mentioning intense E causing
plywood to catch fire!
Yes but that rather appiles to HF and VHF i think. I have not had
problems on 137 kHz using PVC, unless it stays DRY!!
Another big advantage seems to be the use of the Kapton tape i mentioned
a few times now. It greatly helps to prevent surface erosion by arcing.
My new 8270 Hz coil is wound on PVC using the Kapton tape inbetween. The
coil was on air at ~ 30 kV (rms) for more than 100 hours now and i can
see no trace of erosion at all, although i have been on air during rain
/ high air humidity.
It will be a very happy day if you can receive my EbNaut!
It's up to you now, my RX is ready :-)
BTW if you want to radiate a somewhat stronger signal i can recommend
this coil body:
https://dl.dropboxusercontent.com/u/19882028/VLF/20170312_130638.jpg :-)
73, Stefan
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