11-07-01, 11:39 PM
I occasionally am asked to add FM radio reception to master antenna systems in apartment houses and condos. To balance the signal levels, I have been using about half-a-dozen Wineguard FT-7600 dual notch traps, but I'd like to find a commercial-grade product to do the same thing. A couple of years ago, I saw a rack-mounted device with at least a dozen tunable traps in it that I know had been installed recently, but its case looked like something that had been fabricated in a garage, with no manufacturer's markings on it. Does anyone know of a multiple, tunable FM notch trap that I could use for this purpose? And if this isn't asking too much, I'd like it to be cost-competitive with the FT-7600s.
And while I'm looking for the non-existent, there used to be a "company" called Star Circuits that made inexpensive, tunable notch traps covering frequencies of 54-300Mz that were intended to allow bootleg viewing of "beeping channels", but which I used to reduce aural carriers and to pick off other stray RF interference. I used to brag that I was their only customer who was using those filters legally. They sold for $20 each in quantities of ten, which compares very favorably to the pricing of Blonder-Tongue MWT-2, 3, and 4s, which are the only comparable products currently being produced that I am aware of (I don't usually consider Microwave Filter products because I have to somehow make a profit). Does anyone know where I can get cheap, tunable notch filters?
By the way, Pico will still tune a bandpass filter for FM on special order, even though their most recent catalogs did not list FM bandpass filters as current production items.
And while I'm looking for the non-existent, there used to be a "company" called Star Circuits that made inexpensive, tunable notch traps covering frequencies of 54-300Mz that were intended to allow bootleg viewing of "beeping channels", but which I used to reduce aural carriers and to pick off other stray RF interference. I used to brag that I was their only customer who was using those filters legally. They sold for $20 each in quantities of ten, which compares very favorably to the pricing of Blonder-Tongue MWT-2, 3, and 4s, which are the only comparable products currently being produced that I am aware of (I don't usually consider Microwave Filter products because I have to somehow make a profit). Does anyone know where I can get cheap, tunable notch filters?
By the way, Pico will still tune a bandpass filter for FM on special order, even though their most recent catalogs did not list FM bandpass filters as current production items.