Admiral 14R12 Restoration

[Crist Rigott]

Originally Posted by bandersen

It's a bandpass filter and the adjustable coils determine the frequencies that get through. You don't need to change any components. You need to adjust the slugs so they let the right frequencies through. What exactly happens to the response curve as you adjust A1 through A4 ? The response curve should distort and shift around. You're going to need to adjust all four to gradually shift it over and get it looking like it should.

What happens when I A1 - A4 is that mostly the peaks rise and fall and one gets smaller while the other gets bigger.

I'll tweak them to see if I can get the right shape at the right freq.

Thanks for hanging with me on this.