Sometimes even the best of filters won't help on a busy moutain top. Someone placing a radio into remote base operation should have a operational game plan first followed by the most practical engineering.
Does the remote base radio operate as a frequency agile radio and where. Does the radio stay fixed on specfic frequencies type questions. The filters parked in line will change with the ap. While the DCI 2MHz filter is nice to have in service... it's not going to be nearly enough on a real busy mountain top. You mention the problem signals as being same band 2-meter signals. So without some serious filters there will be probably no soup for you. I'm having the same DCI not enough problem at one of our locations. Pretty soon the mentioned DCI filter will be replaced with a more specific filter network. cheers, s. > Check the plots at <http://dci.ca/?Section=Products&SubSection=Amateur>; > they're not that bad. It did fine for this application, as all > the mixes we got were in-band 2 meter signals. Ideally, you'd > want to pair it with the PAR notch filter to take care of the > 152 MHz paging TXs, as the rejection of the DCI filter @ 152 > is ~30 dB. > > > The DCI filter is only "ok" for use in a casual application. It's > > not narrow by any means nor should it to be trusted to help a > > receiver at a very busy location. Also depends on which dci > > filter you have and how it's installed. The typical DCI 2 > > meter band filter is a pretty wide beast. It's not going to > > help as well (on a busy radio site) as most people would > > expect/hope.
