I'll make a long story short. I have been generating some RFI and in the process of trying to eliminate it, I was loaned an Industrial Communication Engineers Ltd, Model 430, Wide Spectrum TVI Filter. Specs are from 54-800MHz, 75 Ohm, non-DC passive, polarized. I put it in-line with my Cablevision and it seemed to work well. Problem is, there are certain channels that do not come in anymore. I am using a Scientific Atlanta 8300HD DVR. It appears that the filter is blocking those channels out. Is it possible that the filter IS
doing that and if so, how/why would it do it only to certain channels?
Also, does anyone have any information on where I could buy more of this company's filters? Or recommend a good high pass filter? I checked around and Radio Shack and MFJ seem to be the only place I can find one and the reviews were not favorable. I thought about making my own so I 'Googled' high pass filters and found what seems to be a nice little calculator (http://www.wa4dsy.net/filter/hp_lp_filter.html
). Might it be better to build my own?