I disassembled one for channel 4. The cavities were about 3 feet in diameter. I salvaged the plungers for the INVAR rods. The diplexer was mounted on a huge roll around aluminum frame. The cavities were connected with 3 inch ridge line. There were four cavities, two fir video and two for audio. There was a 5 KW reject load attached as well as two power meters for 3 in line. The slugs for these look like Bird 43 slugs and will fit into a Bird 43 meter, however, the coupling is wrong for a standard Bird line section, so, the slugs read very low, ie, 500 Watts pins the meter with a 25KW slug installed.
Have you seen what you are getting? A friend of mine made fuel tanks for his generator from the channel 4 cavities. I suspect that you could get the cavities to 220 MHz, At 25KW, I suspect that your cavities are also fed with 3 inch rigid line. 73 Glenn WB4UIV At 07:37 PM 8/11/2010, you wrote: >I have just been told I am about to receive a dielectric brand >diplexer rated at 25000 watts on 191 Mhz from a analog TV >station. I feel a little bit like the dog that catches the car he >is chasing. Now that I have it, what can I do with it? Any >ideas? Can it go to 220? Does anyone have any experience with these? >Thanks >Bill N4XIR > > > >------------------------------------ > > > >Yahoo! Groups Links > > >
