On 7/23/2010 10:34 AM, tahrens301 wrote: > > > Hi folks, > > Still working on the hardline duplexer for 6 meters, and have some > data I'd like to run by you guys. > > Running 80 watts out of a Micor tx into the TX bank of cavities. With > test equipment, get about 100dB notch. (shows 50 watts into dummy load > as well).. have about 1.5 - 2dB loss through them. > > Ok, now I hook the spectrum analyzer up to the receiver port, and I see > about -55dBm. 50 watts = +47dBm, minus the 100dB notch = -53dBm that > is pretty close to what I'm seeing at the rx antenna port. > This should be good enough. You probably want the TX freq well below -30 dBm or so. TX noise should be notched to at least 10 db below the noise floor at the RX frequency. IF the TX is a Micor or MASTRII of any stripe, 100 dB at teh RX frequency ought to be fine with margin. > > > Question is: Should this good enough for a low band micor receiver? > > Thanks, > > Tim W5FN >
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