> n...@... wrote: > ...but what is the noise figure? > I'm going to ask this every time someone says they > "perform very well". > Bob NO6B
Depends on the Pre-Selectors Generation and options. The original active device could be one of a few different types. After a period in time a GasFet upgrade was offered as an option. One would have to ask what the current default active device is. If it's not a GasFet I would probably guess they do offer the option. A GasFet or Phempt is not always a desired upgrade. One of the largest US Land-Mobile (two-way) Radio Preamplifier Suppliers specifies mostly a high performance BiPolar Device in their high-level mountain top antenna distribution systems. The Noise Figure is not always the most important specification. s. > > Another very good choice for this application is the > > GLB Preselector / Preamp from Simrex Corp. > > I have several of these deployed on 144/220/440 > > Amateur repeaters and they all perform very well. > > They can be tuned to maximize gain or selectivity > > per your requirements and their support is outstanding.
