[amsat-bb] Re: MMIC for LEO preamp?

Jim Sanford wb4gcs at amsat.org
Wed Nov 26 08:31:58 PST 2008

I have buile ONE demi preamp -- 2.4GHz as I recall.  Well designed, OK 
to put together (doable, but must be patient and careful -- probably 
less of an issue at 2m).

Performs very well.

You could do worse than a demi kit.

wb4gcs at amsat.org

Curt Nixon wrote:
> SO...now I have made a few contacts on AO-51 and SO-50.  Now I need to 
> get better ears.
> I have a very simple mode J setup using a couple of old mobil rigs--the 
> rx unit is an IC 2350H.  10 el cheap yagi through 60ft of LMR400.
> I'm considering options for a mast preamp for rx only. I'll be using a 
> diplexer for desense ahead of it, and eventually add coaxial switching 
> so I can use TX.
> I'll feed with power through extra wire in rotor cable.
> Looking at the Hamtonics, DEMI kit and a hombrew from scratch.
> 1.  Any experiences with the DEMI units as kits?
> 2.  with there relatively high NF, are the MMIC devices like the ERA 
> series, at all appropriate for simple mast preamps for entry level 
> application?
> Thanks to all.
> Curt
> KU8L
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