I talked to the guy that obtained the duplxers for our club and he confirmed my
belief. Those 4 cans began life as 4 separate BpBr filters used on some
offshore communications, possibly mobile telephone or phone patch. He was not
certain. Anyway the high pass side worked great out of the box so to speak, but
the lo pass was a booger. I had to change the parralell cap values on the
tuning caps for the notches. I still don't have quite as good a notch as I have
on the high pass pair, but it works well anyway.
73 de N5NPO
Norm
