Many thanks to SWLing Post contributor, Giuseppe Morlè (IZ0GZW), who shares the following:
Dear Thomas my friend,
I built another Tferrite, (TFERRITE 2), for medium waves–this time also with the shortwave option.
A single variable capacitor, 800 pf, and a primary winding on the 2 ferrites of about 46 turns, a secondary winding of 3 turns to pick up the signal and send it to the receiver.
On the PVC tube I wound 4 more coils, for the shortwaves, connecting the ends to the same variable together with the other ends.
I interposed a switch on one end to eliminate or insert shortwaves.
I am sending you these 3 links from my YT channel where you can see the tests I have done in these days with no propagation.
The yield in mediumwave is excellent, like the other one, yet also good for the shortwaves–to be so small it compares very well.
Let me know what you and the whole SWLing community think!
Thanks to you and a greeting from Italy, Formia on the Tyrrhenian Sea.
This is brilliant, Giuseppe! Thank you so much for sharing your homebrew antenna projects. It seems they work so well from your beautiful urban location in Italy!