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Re: VLF: Resonate the antenna, or not?

from [Scott Tilley] [Permanent Link][Original]
To: [email protected]
Subject: Re: VLF: Resonate the antenna, or not?
From: Scott Tilley <[email protected]>
Date: Tue, 22 Mar 2011 22:55:56 -0700
In-reply-to: <[email protected]>
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Hi Stefan
  The mains has just to supply the losses. So the critical parts are the FETs and the loop wire diameter. I think 100 A rms is a problem for most loops. But i would give it a try. Even the 4x or 5x 1.5 mm^2 could take that current for a while, depending on the outside temperature. BTW there will be a current limiting when the temperature increases :-)
The loop here is a #2 AWG (6.5mm) AL conductor.  And yes I note considerable difference between cold days and warm ones on 2200m.  Somewhere I have some measurements.


Who is the one who does the first test? Scott? :-) BTW the distance between VE7TIL and KL7UK is just 2084 km! http://no.nonsense.ee/qthmap/?qth=CN89DK&from=bp51ip

I pulled the h-bridge design of yours from my files and found a version of this in my junk box...  Now the magic question is when can I find time to rig this up?

Scott, what do you estimate is the current limit of your loop wire and what is the area? And what is the bearing?

Easily a couple hundred amps.  600m^2 and aimed right at Laurence.  See my website 'station info.'

73, Stefan/ EI/DK7FC



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