ub5_073_oleg wrote:
>
> Hi,
>
> I'm thinking about building an automatic tuning controller
> for my magloop. It could search for a current max, but this
> can be a challenging task.
>
> It's probably easier to look for a capacitor position where
> the phase between voltage and current crosses the 0, with
> reasonable deadband for stability. This is probably easier
> to find than a current max.
>
> What I'm looking for is a working example, since my
> experience is not enough to design the whole from scratch.
>
> I found already some commercial devices:
> http://wimo.de/magnetische-loop-antennen_d.html
> http://q-mac.ru/en/qmac_mx9027.html
>
> Joe K3JLS is working on MLC, too (was
> www.k3jls.com/mlc.html, should be put live when Joe's
> project is ready)
>
> A nice newsgroup conversation on the same subject:
> http://newsgroups.derkeiler.com/Archive/Rec/rec.radio.amateur.antenna/2005-10/msg00268.html
>
> Does anybody here use an automatic, phase detector based
> magloop tuner?
>
> 73! Oleg DL2IPU
>
>
About a year ago I came across a site containing a full description of a PIC
based automatic tuner for the MFJ magnetic loop. I think it was a US ham's
site. But I didn't bookmark it and I have never been able to find it again.
Perhaps someone knows where it is.
-----
Julian, G4ILO K3 s/n: 222 K2 s/n: 392
G4ILO's Shack: www.g4ilo.com
Zerobeat Ham Forums: www.zerobeat.net/smf
--
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http://www.nabble.com/phase-detector-for-tuning-magnetic-loop-tp17844244p17844669.html
Sent from the Elecraft mailing list archive at Nabble.com.
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