In article ,
"JB" wrote:

154 MHz overloaded the antenna amp. I bought a "Midband Trap" from a TV
shop downtown which fixed things. It went inline and attenuated those
non-TV signals between (approx) 120 - 170 MHz. It was only a few
dollars
from one of the well-known TV reception equipment makers, Channel
Master,
I
think.

Unfortunately, I haven't found it from any familiar names, but I did
locate
this page http://www.microwavefilter.com/pdffiles/pg27.pdf. The
3367-A/I,
3367-B/G, 3367-C/G and 3367-C/H should all do what you need for 2m
suppression. Prices unknown.

... and this page: http://www.atvresearch.com/overstk.pdf Find their
number 5KMT-A/I-TX Midband Trap. A clearance sale bargain if they still
have any left.

Here's a single-frequency tunable notch;
http://www.microwavefilter.com/pdffiles/pg28.pdf.

Good luck.
These are pretty common in the CATV business where they will notch channels
to put their own access channel in place.

It is likely the CATV guy came out and took all the filters out in
preparation for the digital channel changeovers. There ought to be a High
pass filter to cuttoff below channel 2 and likely a notch for VHF
air/commercial?ham energy. They may have also goofed around with a cheap
distribution amp. Many of the good setups would split up and break out
individual channels to peak or attenuate to try to balance the lineup.

hi

There never w as any filters just antenna going into a master am,
that had a tone of settings but i don't think anything was build
into the amp to actually filter or notch the current one is a Pico
52 it has gain tilt attenuation fm trap going from memory i
think thats it

but previously no external filters the prev master amp was
blounder tongue seemd to have simular settings

since the reception is so poor now perhaps once they fix/ballance
out the system that might also reduce some 2m interference

good idea you had