Views of the bazooka dipoles installed on VLA antenna 5
Close-up of two elements and feedlines goint to receiver in the apex
Bazookas on ant. 5 with the
dish tipped over
Construction, installation, and testing assisted by
EE student and Intern Diana L.
Erickson 74 MHz dipole raised on the VLA antenna
View of apex & dipole
through dish hatch
View of dipole under the subreflector
Closeup of the dipole balun box & feed lines
Dan M. and Sterling C. building and testing the MJP at the VLA site
GTX145934
The Modified J-pole antenna installed on EA27
Close ups of J-pole elements, coax termination, and mounting ropes
Aluminum Version MJP
Galvanized Steel Version MJP
Reflected Power Sweeps
Balun box - connector side (faces dish surface). N-type is X (N-S)
polarization; TNC is Y (E-W) feed.
Balun box - top side (faces subreflector) with cover removed to show balun components
Detail of old balun box showing "dead bug" construction.
Balun box - top side - with new label to ensure proper orientation
Balun box - top side - with cover removed to show new balun PCB
Detail of balun transformers mounted on PCB
What's on this page?
Click photos to enlarge to 300 dpi
Page 4
NRAO/NRL Low Band Receivers
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