[Lowfer] Ferrite Loading Coil ?

[John Andrews]

Peter,

The need for high Q in a loading coil for receiving is not as great, as 
there is usually an excess of signal+noise, and you can easily stay well 
above the receiver's noise level. And as Pete points out, the current is 
very small and not an issue. On the other hand, you might have a problem 
with swings in outside temperature, as the inductance will vary with the 
temperature-dependend Al of the ferrite core. If memory serves, type 61 
material shows better temperature characteristics than the denser stuff.

The reigning expert on ferrite loading coils is Bill Bowers. He did any 
number of articles on ferrites for The Lowdown. He doesn't watch the 
mail lists, but definitely responds to email. His email address is under 
WEB on the Lowfer Operator List on the LWCA site. You might ask the 
question and share the response with the group.

John A.