Radar, AA, No4 Mk7 ready for action
Radar, AA, No4 Mk7 ready for transit
Mobile equipment, providing early warning and target acquisition data to a FC radar. Facilities for operating with Equipment, Acquisition, Radar Target, AA, Remote, Mk1 are provided.
Mobile S-Band transmitter and receiver in a trailer, 10-ton, 8-wheeled, radar, AA, No4 Mk7.
Plan position indicator (PPI) of targets on 9" CRT to optional ranges of 40,000yds,
80,000yds and 120,000yds.
'A' type scan on a CRT for monitoring.
Adjacent display (AD) plan position indication of targets on a remote consol.
Continuously rotating at 15 rpm consisting of a Durestos cheese and reflector.
The reflector is manually adjusted for minimum ground clutter. The operator can alter the
tilt angle, for height finding, during operation by means of a hydraulic drive system.
Pressurized waveguide feed with common T.R system.
Orientation by means of a sighted tube mounted on the reflector.
|Weight||15 tons 19 cwt|
|Wading depth||5' still water|
|5' + 1'6" wave|
|Braking system||Air brakes with mechanical handbrake|
|Towing vehicle||10-ton 6x6 FV1100 series|
|Receiver bandwidth||1Mc/s at -3dB|
|Tx power output||1MW|
|Tx pulse width||1.25 us|
|Recurrence freq||700 to 800 c/s|
|Detection accuracy||range +/- 500yds|
|azimuth +/- 1.75deg|
|Target discrimination range||500yds on 40,000yd sweep|
|Target discrimination azimuth||5deg|
|Data Transmission Range & azimuth||by synchro|
|Data Transmission Elevation||by telephone|
415/240V ac 50c/s, three phase.
Consumption : 25 kVA
Normally supplied by a skid mounted Meadows diesel 27.5 kVA generator. Can be mounted in the towing vehicle or in a separate vehicle.
Meadows 27.5 kVA generator
Radar : 2
Provision is made for the fitting of IFF when provided.
The cabin is fitted with an air-conditioning plant consisting of heating and cooling
systems, which enables the equipment to be operated under all climatic conditions.
A water cooling system is fitted to the magnetron.
As for radar No4 Mk7 but modified and fitted with IFF Mk10.
As for radar No4 Mk7/1 but modified for use with SAGW equipment
References and Sources
- EMER, Telecommunications, 0 240, Equipment Radar, AA,No4 Mk7, Mk7/1 and Mk7/2, Data Summary, Mar 1960,
- Equipment, Radar, AA, No4 Mk7, User Handbook, 1954,
- R.E.M.E. Museum Archives, Arborfield.
More No4 Mk7 pictures
PPI & monitor crt