--- In [email protected], "Jeff DePolo" <[EMAIL PROTECTED]> wrote: > > > Some one heard the owner of 165 talk about having to keep the > > power down > > because of desense. > > A perfect example of bandaidsmanship. > > > What about a band pass on 147.765? > > Nah, it would only buy you a couple of dB of attenuation at 147.93. > > > It may take a crystal > > filter or just > > padding the input a little. I don't know what kind of preamp it is. > > If it's his repeater Tx overloading his preamp or Rx, an extra pass/reject > cavity (pass 147.765, reject 147.165) before the preamp would likely fix the > 33 issue, and possibly help, if not cure, his desense problem as well, > unless the desense is being caused by transmitter noise, in which more > filtering on the Tx would be necessary. > > --- Jeff >
I agree with Jeff. Put a notch cavity ahead of the preamp tuned to it's 165 transmitter. I bet removing the preamp would cure the whole problem. I am having trouble with my posts showing up. I tried earlier via email but it didn't make it. This is from the group board. 73 Gary K4FMX
