430 Mhz Yagi calibration
A 430 Mhz yagi antenna is mounted on the carriage
house uphill from the linefeed.
15aug06: found the limiter switch after the first amp was burned out. Stuck
in the closed position. Replaced it. Looks like tsys drops to around
10aug06: installed new low loss cable from frontend down to yagi. reduced
Tsys. Remeasured cal (since new cable changed cal value). Old value was
about 124K. new value is 88.83 K.
01aug06: did a few crosses on 3C286 to check the new pointing offset.
25jul06?: moved yagi closer to the line feed.
22may06 fixed broken capacitor on 1 of yagi driving units. Remeasured cal
values. The old values were off by a factor of 3!.
23dec05: 430 yagi lowered by .406 meters to put it 3 meters below the paraxial