Re: Reliable but reasonably priced sources of ferrite for FSLs?-FARMERIK
The added capacitance will provide better low-end performance on an air core loop, and so it should on an FSL.
One other feature from the original 4' loop design was a Q-spoiling pot to add or remove resistance from the circuit and improve audio clarity. I never got to a point where I felt that I needed that with mine and I eventually removed it entirely from my 2' loop. If the audio isn't improved with the switchable capacitance, the pot may be another option to consider.
Blue Bell, PA
From: main@UltralightDX.groups.io <main@UltralightDX.groups.io> on behalf of Todd via Groups.Io <toddemslie@...>
Sent: Wednesday, February 6, 2019 5:57:20 PM
Subject: Re: [UltralightDX] Reliable but reasonably priced sources of ferrite for FSLs?-FARMERIK
Not yet, Russ. But adding additional (temporary switchable) capacitance to my 40 inch box loop would offer the following advantages:
1. Lower frequency coverage for long wave AITS stations, etc.
2. Lower circuit Q which corresponds to decreased muffled audio towards the bottom end of the MW band.
I assume higher loop or FSL Q selectivity response is obtained with higher inductance, lower capacitance, and lower coil wire resistance.