I am looking for a circuit diagam for a MW pre selector, anything would be
of interest

A Cohn filter covering 1.75-7.2kHz, is shown on
http://home.online.no/~la8ak/c11.htm
some Cohn filters have been published and turned out to be extremely
difficult to copy, but LA7MI claims this is quite easy to make.
Perhaps somebody could scaLe the values down to the mediumwave band?

I've received some more requests for such construction, so I am not
worried whether this writer needed a simple filter or not, it is a lot
of demands for useful solutions

73
jm