Thanks. We'll have to go measure them. It's all RG214 coax, and they look to be about 12-15 inches long, with PL259s everywhere.
One error in the data I posted earlier: the notch depth is only 90dB, not 120dB. I had the reference level of the spectrum analyzer at -30dBm when I was looking at the notch, which was 6 divisions down (60dB). The marker also said -89.9dBm, so I mistakenly added the -30dBm reference to that and came up with -120dBm. Wrong. Each cavity had 39dB notch, no error there, so by adding 6dB per cable, that brings it up to 45dB times two, or 90dB, which is exactly what I was seeing. The spec is 85-90dB rejection so it would appear to be working just fine. Bob M. ====== --- DCFluX <[EMAIL PROTECTED]> wrote: > Each cable in the phaseing harness that is cut > correctly will result > in an additional 6dB of rejection each. The cables > should be 1/4 > wavelength electrically, so you will need to look up > the velocity > factor of your cable and use it to calculate the > lengths. The lengths > should be to the center of the tee, which should > also be calculated in > to the equasion if you can find the velocity factor > of the t. > > Sinclair takes the aproach of eliminating the T and > using special > connectors that work like a T with the coax going in > the sides. This > can be emulated by using thin coax like RG-223 and > drilling some holes > in the side of the connectors. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
