a
with the AN/FGC~5 code converter was off frequency.
Correction
was . de by adjusting the oscillator in the drive units using the
600 cycles from WIV to set up the proper frequency.
In thecontrol tower, line arplifiers were installed on the
output of the HF and VHF receivers to allow operation at a lower
audio level, thus preventing crosstalk in the cable.
A patch pan-
el was constructed for control tower receivers; so that if a primary receiver goes out, a spare receiver can be immediately patched
in with no resulting outage.
An EE~8 telephone box was installed
to replace the four separate phones.
Previously tower personnel
had no way of kmowing which phone was ringing.
Under the present
system the operator uses only one phone for all four circuits.
When the buzzer sounds, an indicating light flashes to identify
the calling station.
Im addition, the old antenna frames for the
=
RC-81 anternae were removed fror. control tower cab.
At the VHF transritters site, two BC-640 VHF transmitters
that were returned from Bikini were overhauled.
Installation was
completed of the AN/TRC and carrier terminals as back up for the
land lines.
Prescribed modifications were effected on the AN/GRT-3
transritters, and routine preventive maintenance was performed on
all equip:ent.
The LGA 600 power unit usec to furnish emergency power to
the 40C and Building 90 burned out, and was replaced by a spare
GNC-F-~3 power unit fror the GCA site, pending generator repair for
the LGA 600 in Honolulu.
wm
Teletype Maintenance.
An AN/TGC-1 bay was rewiree to mon
ee
—
4.