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Argus25 · 28th Nov 2017, 1:16 am

I think this is similar to what I used:

https://www.tubesandmore.com/product...-minimum-order

You could always try it with something like 1 to 1.5mm diameter enameled copper, which would probably be reasonable for experimental purposes, but not as good as the litz. If the turns were tightly bunched the self capacitance might put it out of range with the tuning capacitor values I used, so you could spread the turns a little.

The 240pF coupling value is important so the reactance of the inductive coupling elements is cancelled at the operating frequency, so since your setup could be a bit different, make that a variable capacitor and peak it for the lowest input Z at the 1.48 MHz operating frequency, it should be close to 50R.

28th Nov 2017, 1:16 am	#50
Argus25 No Longer a Member Join Date: Oct 2016 Location: Maroochydore, Queensland, Australia. Posts: 2,679	Re: Another Pantry MW Thing I think this is similar to what I used: https://www.tubesandmore.com/product...-minimum-order You could always try it with something like 1 to 1.5mm diameter enameled copper, which would probably be reasonable for experimental purposes, but not as good as the litz. If the turns were tightly bunched the self capacitance might put it out of range with the tuning capacitor values I used, so you could spread the turns a little. The 240pF coupling value is important so the reactance of the inductive coupling elements is cancelled at the operating frequency, so since your setup could be a bit different, make that a variable capacitor and peak it for the lowest input Z at the 1.48 MHz operating frequency, it should be close to 50R.