Cecil Moore wrote:

Jim Kelley wrote:

Cecil Moore wrote:
Traps are a different subject. Self-resonant coils should only
be used at a current minimum point. IMO, they are much too lossy
to be used at a current maximum point.

But a trap needn't be any more self-resonant and lossy that a loading
coil. A loading coil could function as both if it were in the proper
position for the upper band(s). No?

I'm not sure about "both".

What would it take to get you to be sure about it?

It's more than obvious that a resonant
coil+cap will (almost) always be more efficient than a self-resonant
coil.

And I though it more than obvious that a series inductor could function
as a low pass filter.

73, Jim ac6xg