Plessey PRC 320/1 - Construction

CONSTRUCTION
1.7 The ATU is contained in a sealed, cast case,
which is finned to provide efficient convection
cooling. Connectors for the r.f. input from the 100W
amplifier and signals from the PV1518 control unit
are mounted on the front panel, and antenna and earth
terminals are mounted on the rear panel. |
1.8 The 100W amplifier is of similar appearance and
construction, with one audio and one supply connector
on the rear panel, and all controls, indicators and
remaining connectors on the front panel. Lugs on the
bottom and threaded bosses on the top of both this
unit and the ATU provide for mounting one on top of
the other and for securing to the РУ1517 or PV1318
mounting trays by means of M5 screws.
1.9 The PV1317 provides а shock absorbing mounting
for the PV1518, ther 100W amplifier or the ATU, or a
Stacked combination of them. 1% comprises a flanged
tray of aluminium alloy supported on four resilient
mounts. А second tray, similar to that of the PV1518
(para.1.10), may also provide a mounting for the
RT3520/1. Fixing for the PV1318 or second tray is
provided by two dowels on the rear flange, which
engage with corresponding holes at the rear of the
PV1318 (or second tray), and two clinch nuts on the
front flange, which accept corresponding screws in
the front of the PV1318 (or second tray). Fixing for
the 100W amplifier or the ATU is provided by four
clinch nuts on the base of the tray, which accept the
M5 screws by which these two units are secured.
Earth connections are made by two captive screws on
the front flange.
1.10 The PV1518 provides a mounting for the 100W
amplifier and the ATU and it also incorporates the
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