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Old 13th Sep 2020, 5:55 pm   #8
Gabe001
Hexode
 
Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 435
Default Re: Antique loop aerial, mains powered

Quote:
Originally Posted by Herald1360 View Post
Quote:
Originally Posted by rambo1152 View Post
Interesting.....

It's a tuned amplifier, not a broadband one. The mysterious box in the circuit contains a selector switch and some coils and a capacitor (at least that's what's visible) for LW,MW and SW.

The circuit is clearly for a later model since it shows an EF80 with different resistor values from the unit in the pictures which uses an EF42.

Attached is "English style" version of circuit.

Assuming that the actual loop is a simple single turn of chromed tube it would make an interesting DiY project.
Nice work chris. I think I understand how it works now.
I believe there was a copper loop version and an aluminium loop version. The copper loop version allegedly performed better.
If someone here does make one, I'd be interested to know how it pans out.

Gabriel

Last edited by Gabe001; 13th Sep 2020 at 6:02 pm.
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