Used on Royal Navy "Type 675"
(Guardian) Jammer System
Also used on Optical systems
and guns.
Original applications include Invincible class carriers, type 42 Destroyers
and type 22 Frigates. Two
large D.C. servo motors with integral tacho-generators provide a high level of maneuverability for this tracker
head. Both motors are provided with magnetic brakes and "synchro" position
feedback sensors**. The motors and other sensitive parts are protected inside a robust
"clam-shell" weather shield. The original pedestal mounting supports
the director head high on the superstructure of the ship. A pair of substantial, tilting bosses protrude from the
enclosure, while the whole assembly swivels at the base. A very high quality
item, weight approx 60Kg.
Spares and circuit diagrams are available.
Specifications:
General:
Dimensions
Weight 60Kg
Load 100Kg
Azimuth Axis (pan):
Travel (original spec.) 180deg.
Travel (maximum possible) >360deg.
Internal shaft diameter 60mm
Internal shaft length 140mm
Driven gear diameter 205mm
Driven gear teeth 160
Drive motor:
50V D.C. (minimum 2V D.C.)
Tachometer; 1:1 voltage ratio
Position sensor**:
Synchro control transmitter;
400Hz 115:90V
Mounting boss diameter 165mm
Altitude Axis (tilt):
Travel (original spec.) 50deg.
Travel (maximum possible) >120deg.
Driven gear (quadrant) diameter 205mm
Drive Motor
50V D.C. (minimum 2V D.C.)
Tachometer, 1:1 voltage ratio
Position Sensor**:
Synchro control transmitter;
400Hz 115:90V
The clam-shell protective case is made from high impact cast aluminium
and provides a hermetically sealed environment for the internal
components. This unit is designed to survive some of the harshest
conditions encountered on the planet, and to resist salt water spray.
Internal view of tracker head showing layout of twin
D.C. servomotors and position sensors**.
The Type 675 provided advanced protection for the British Royal
Navy. Designed to operate in an extremely harsh environment, exposed
to a punishing combination of temperature, wind-load, wave motion and salt
water spray.
This unit is a multi-role director/positioner/tracker
head. It was used in several Naval systems, notably the antenna assembly
of the Royal Navy "Type 675" ECM
Jammer system, also known as "Guardian". Also designed for use
in optical systems and gun control (see radamec
website or cache version). This system was
recently decommissioned by the UK MOD (Read about
this decision). The director unit is available new, reconditioned or in
good used condition. Also available are the original pedestals and
outrigger "spiders" for payload mounting.
** The original "synchro"
position sensors may be replaced with digital shaft encoders or precision
potentiometers as required. Please enquire for details.
These directors are suitable for a wide variety of professional and hobby applications, including:
