So for a realistic solution you need to place some form of tight pre-selection in front of the receiver. Cavities might be possible but not practical.
I'm not sure if they're cost effective to buy but for an Amateur Radio 10 Meter Repeater Project but... piezo (crystal) filters for 30 MHz are probably going to be a viable path if you have the time, cash and tango. I'd build them but you can buy them Piezo Technologies in Florida has merged with another company now found at: http://www.mtronpti.com/ You'd be looking for a "front-end filter": http://www.mtronpti.com/products/index.php?category=Crystal+Filter&prodid=293418 Sit down before you review the price sheet pdf file... there's a reason why it takes so long to download... da' prices are fairly hefty. Piezo xtal filters are kind of lossy, but when they become the life-saving "only game in town" you will quickly learn to live and forgive the loss of a few dB. cheers, skipp > "kb1we6r" <[EMAIL PROTECTED]> wrote: > > Thanks, yes, the split is too close to do much! > I recently had both sites equipment here to check it out, everything > looks good and plays (individualy) here with no problems. > > With the transmitter turned off, weak signals can get in and sound > great on the UHF link. > > I just learned that there is a CAR TYPE BATTERY CHARGER across a > battery at the receive site. aAARRRGGHH!! I don't know why the noise > appears only when the transmitter (miles away) comes up though, but > the first order of business is to pull the plug on that thing and see > what happens. (maybe it is playing havok with the Maxtac's noise > blanker?) > > Why oh why did they pick 100KHz??? The 10m band is HUGE with no > activity (even when the band is open, there should be plenty of room > for a better repeater plan). > .... Keith, WE6R in Monterey CA
