SM 5 CUI Amateur Radio Station
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My 2m. Antennas now.
4x15 el. 3 wl QueDee H pol.
Inside:
4x10 el. 1.6 wl  Wisi V pol. 
​Tower 15m. (50 ft)
Two 30 m (100ft) 1 5/8" feeders.
0.25 dB loss each. 

Rotator: Alpha Spid RAK +  F1EHN sw.

My Antennas

50 MHz Antenna
Click to enlarge pictures below.
The shack
Azimuth and elevation control CDE Rotor for 50 MHz antenna

My old (but in good shape) rigs for 2m, and IC-706 MK IIG 
TRX: FT 225 RD + Home made PA 2 x 4CX250B  / 800 W out.
144 MHz RX 2 : FT 225 RD  +  432 MHz FM TR 8400


How I measure the drive power from TRX, output from PA and reflected pwr. 
Home made calibrated directional coupler. 50 dB coupling factor at 144 MHz.


 2 way switch. TRX or PA to antenna switch.       R&S NAP _ HP 432 A _ HP 435 A                  Directional coupl. on station ground plate (earth) 

   
​  2 way Coax switches Spinner BN 51 26 90__ http://www.telsat.it/uk/products-79-908.htm

The upper switch: In to the Left = H-pol antenna. In to the Right = V-pol antenna.
 
Top connected cable go to a small relay to protect the input of LNA-2. (MGF 1302)
The coupling between the two antenna  systems is abt 40 dB.
1 kW to either system = 60 dBm  -40dB = 20 dBm = 100 mW= No good in to the LNA-2.

Switch below is the TX/RX switch. In TX sequence the LNA is terminated by the dummy load.
The LNA-1 to the right : ATF 54143 / 0.2 NF. 



Bild
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