This preamp is measured with only 0.15dB noise-figure and has 18dB of gain. It is unconditional stable.
The desciption of the construction is copied from Dubus magazine and printed below. The preamp is combined with coaxial relays (REW14) in a watertight enclosure. The 2 relais are in series to the preamp input and gives seperatet TX/RX lines to the shack.