My thoughts as well :) I know that the Big Bear repeater uses a Hamtronics and it does well enough but we needed far better quality and went commercial.
My only thought that was as a preselector the Hamtronics might have something to offer. As I said, the Angle Linear is on the top of the list, but the piggy bank is getting low. The Decibel Product DB-4002 with a < 10dB preamp will do for now. If my wife doesn't toss me and the repeater out soon :) --- In [email protected], n...@... wrote: > > At 2/4/2009 18:21, you wrote: > >I do have another bandpass cavity that has 55dB attenuation. Rather > >than use the 24dB preamp I can always use the one with less gain > >because I too was concerned with overloading the front-end. > > > >The Hamtronics is a preselector helical resonator preamp, so doesn't > >it already do what the extra cavity does by way of the helical > >resonator? > > See my earlier post. Helical resonators are either lossy or have low > Q. Can't get steep skirts in such a small filter without loss. > > > I'm not stuck on Hamtronics. I just want the best solution. > > I don't recommend Hamtronics. I'm not biased, just has something to do > with the observation that nothing I ever bought from them ever met their > own specs. > > Bob NO6B >
