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
