I have a filter made by the above company.
H.O Part number FLO122MN.
It is 17" x 6.5" x 4.25", made from aluminium sheet, and reasonably heavy. Internally four sections, with large fixed coils to ground, and the other side has 7 adjustment screws for tuning, 4 of which go down centres of coils, 3 adjust gap to separation plates.
By use of a wide band noisy diode generator and spectrum analyser, it appears to be peaked at 156 Mhz. I want it tuned for 144 to 146, to try to limit out of band noise I think is upsetting my radio.
There are 4 plastic standoffs with holes in, which must have done something. The manufacturers would not have fitted them for no reason. I suspect some kind of inter stage coupling loop, but whether it is one length, or to separate pieces I do not know.
Does anybody have any information, or pictures of the internals of this device?
