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On Thursday, July 23, 2015 00:10:55 you wrote:
> Hi VLF,
>
> Today I've built a transformer to match the antenna to the PA. This is
> not the ideal solution for QRO / highest antenna currents but i like to
> idea of a galvanically decoupled antenna and TX. Maybe 5 A is possible
> with that arrangement.
> I took 7 ferrite cores in parallel to build that transformer. 39 turns
> primary, 7 secondary. So 1 Ohm is transformed to 31 Ohm. The transformer
> handles (no saturation) 1V per turn at 6 kHz, at least. This should give
> a first detectable signal in the garden loop, i hope.
> https://dl.dropboxusercontent.com/u/19882028/VLF/20150722_134348.jpg
>
> 73, Stefan
>
Hi Stefan
this remember me a "CERN style" balun attached!
I suggest you a QSY near Geneva ;-)
73 de Claudio ik2pii
--
Claudio Pozzi - rispondere a [email protected]
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