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Links of interest - Special Projects - NRAO 

The National Radio Astronomy Observatory has added at their RFI Monitoring Station an ARS Unit (RCI-SE Azimuth & Elevation - 10 bits ADC) for control their Log Periodic Antenna.

You can visit NRAO site at: http://www.gb.nrao.edu/

Click on a photo to see an enlarged version !!
    

    
NRAO design log periodic covering 100-1300 MHz, ICOM R-7000 discone and a Radio Shack FM antenna (got to have NPR). The antenna rotor is an Emotator Az/El EV-800DX

Frontend Box: Miteq low noise/broadband amplifier (.05 - 2.0 GHz), switchable attenuator and coax switch. 
Cable: 1/2 inch Heliax (LDF4-50)
 
Backend: Miteq broadband amplifier (.05 - 2.0 GHz), MCA204M active multicoupler (from Grove). The multicoupler feeds an HP-8591E and 8563E spectrum analyzer and an ICOM R9000 receiver.