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In my h.b 3cm LNAs the best results
was 0.7db ( NE32584 ). Michael (DB6NT) helped me with his new LNA :
LNA#1 mod 102S EME, (0.55/21dB) / wavequide in/SMA out - LNA#2 also
mod 102S EME - in reserve (0.6 /22dB) LNAs from Kuhne Electronik with
meassprotokols #23 and 27 from Michael
My dish is an offset with F/D=0.68
made in RUSSIA "SUPRAL" ltd, same dish as my good friend Sergej RW3BP
(QRV on 24 and 47gHZ EME). These offset dishes are optimised for real
F/D W2IMU feeds ( optimal, very fine feeds diagramm, simulated with
the DOS program W2IMU calculator). With W2IMU feeds, efficiency of this
small offset dish is 78-84% / isolation TX W2IMU feed / RX W2IMU feed
is over 85dB / Rx is optimal - no switch loss - wavequide LNAs input
- on RX feed
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