At 11/26/2009 07:43, you wrote:
> > Advanced Receiver Research makes very good low > > noise preamps as so do several other companies. > >And we've seen Angle Preamps mentioned in these >post. I wanted to make sure the GLB Series of >Preselector Preamplifiers were mentioned. I really >like the GLB Rx pre-selector preamp products: > >http://www.aria-glb.com/products/reset_frames.htm?/products/preselector.htm I think we've covered this before, but I'll say it again: the noise figure spec, the most important spec on any preamp, is missing! Would you buy a power amplifier that only spec'd "10 dB gain"? I also don't see a P1dB spec either. Perhaps these are good preamps nonetheless, but be advised: you'll never get as good of a noise figure as using an ordinary GaAsFET preamp with a 0.25 or even 0.5 dB loss pass cavity in front of it. Perhaps this isn't so important on antenna noise-limited VHF bands, but in SoCal on 220 & 440 it is. The only place I'd use a GLB preselector would be a space-constrained application where a 1/4 wave resonator simply couldn't fit. Bob NO6B
