SAS-2000 WRTC-2000
Safe Antenna Switch user manual
by Marijan M. Miletiæ, MSc EE, S5M, S56A, N1YU, W1BCD
SAS-2000 was developed for the safe switching of two antennas between two radios during
the third World Radiosport Team Championship in Bled, Slovenia from July 5th to 11th 2000.
It has two pieces of RG-58 coaxial cable 1 m long with PL-259 for the direct
connection to the radios antenna sockets. Left cable is marked RX, right one is TX,
according to the WRTC rules. Two SO-239 sockets are intended for the outside
antennas. Left socket should be used for Wire (Windom) antenna fed with RG-58 cable.
Right socket is for Yagi (Beam) antenna with RG-213 thick feedline. There is a
safety ground connection in the middle of the rear end of SAS-2000. Heavy duty
toggle switch with a long red paddle selects the proper antenna for TX while the other one
goes to RX. In the left position, TX is connected to Yagi. Bothantennas are safely
dis-connected from radios in the middle OFF position. Eventual static electricity is bleed
to the ground via 10 kOhm internal resistors. SAS-2000 is
made from the high quality USA components. Extreme care must be taken NOT to strech
two RG-58 cables beyond 2 m of total distance between radios.
