Medium wave pre selector
 

Apart from Ham radio, I like DXing on many other bands, including LF and MW.

I am looking for a circuit diagam for a MW pre selector, anything would be
of interest, bit if someohw has one of thoese super dooper ones that can
focus donw to a few khz that wold be even better, (like the palomar MW pre
selector)

Rgds
Richard
SO5GB