CLARK MASTS PORTABLE MASTS FOR MILITARY USERS

Type 73 MECHANICALLY EXTENDED

VERTICALLY ERECTED SECTIONAL FIELD MOUNTED PORTABLE MAST KITS UP 30 METRES

 Australian Distributors: Portable Masts Australia Pty Ltd - Contact Details

Clark Masts Type 73 Portable  Mast

For over 40 years Clark Masts Type 73 field mounted portable masts have been the communications backbone of many armies. The main features, such as the aluminium alloy mast sections, the winch system which controls the guys during erection, the 3-legged erection gear and the mast lifting hoist which made the first Type 73 portable mast unique, are still there today. Whilst the basic system has not changed, there have been many detail improvements. However, with each improvement the matter of interchangeability has not been neglected.

Clark Masts Type 73 is a field mounted portable mast system which operators rapidly understand and can erect with confidence, even in very adverse weather conditions. Type 73 portable masts are available as field deployable kits with extended heights of 10, 13, 16, 18, 21, 30 metres and vertical headload capabilities from 50 to 75 Kg having a horizontal component from 70 to 150 Kg.

CLARK MASTS 73 SERIES PORTABLE MAST BRIEF SPECIFICATION
Mast Section
Heat-treated light alloy to BS14171, 6082TF. Specially drawn and machined. Anodised to DEF STAN 03-25. Sections can be dyed green, gold or desert sand.
Aluminium Alloys
Castings in LM6 alloy to BS 1490, gravity diecast.
Steel
Where surface hardness is required, medium carbon steel to EN8D, HF induction hardened. Elsewhere EN 1a.
Finishes
Zinc plating and passivating to DEF STAN 03-20. Paint finishes to Military Green or other colours on demand.
Bag Materials
Nylon decontaminable cloth to UK/SC3501 with approved straps and buckles. Stiffening is by means of low density polyethylene removable plates inside the bag.
Guy Cable
Standard 6/9 galvanised steel to BS 3530. Stainless or nylon covered to ISO 2232 or Kevlar on demand.
Clark Masts Type 73 Portable Mast being deployed

Clark Masts Type 73  Portable Mast specifications

Clark Masts Standard 
Type 73 Kit Components

(Example here shows 10 Metre P/N 18130 mast)

Item

Part
#

Title

Qty
per Kit

Clark Masts Type 73Portable Mast Kit Components 1 18201 Mast Guide Box 1
2 10772 Step Assembly 4
3 18020 Leg Assembly 3
4 18114 Foot Assembly 3
5 7600 Hoist 1
6 13973 Hoist Support Bar 1
7 5246 Lifting Block 1
8 5426 Bubble Level 1
9 5373 Foot Adjustment
Brace
1
10 18021 Guy Winch Kit
(Leg Mounted)
1
11 18037 Picket 3
12 18039 Picket Clamp 3
13 18034 Picket Driving Cap 1
14 18033 Picket Extractor 1
15 6409 Leg Spike 1
16 18022 Guy Collar Set 1
17 5231 Mast Section 7
18 14522 Mast Section
Carrier (3 Section)
1
19 14523 Mast Section
Carrier (4 Section)
1
20 18150 Guy Radius Line 1
21 18025 Winch Bag 1
22 18026 Hoist Bag 1
23 18027 Equipment Bag 1
24 18031 Accessory Bag 1
25 18035 Leg Bag 1
26 18028 Picket Bag 1
27 B12173 Hammer 1

View of Packed Clark Masts Type 73 Portable Mast Kit

The number of mast sections, mast section carriers, pickets, guy collars, spikes etc varies according to the actual height of the Type 73 portable mast to be erected. The part numbers shown in the table above include all items needed for a 10 metre field mast kit, Part Number 18130

A Packed Clark Masts Type 73 
Field Mounted Portable Mast Kit 
ready for transporting
 

 

BRIEF DESCRIPTION OF HOW THE CLARK MASTS TYPE 73 FIELD MOUNTED PORTABLE MAST SYSTEM WORKS
Clark Masts Type 73 Portable Mast Mount 1. Three adjustable legs are attached to a central guide tube.

2. Tube sections are fed into the central guide tube and one by one lifted using a special hoist, thus building up the mast.

3. Guys are attached at levels determined by the maximum mast height and are held in controlled tension by the mechanical winch unit.

4. After erection the mast may be rotated through 360 degrees.

5. Retraction is the above procedure reversed.


PICKETS

Clark Masts Type 73 mast kits are now supplied with a picket equally suited for hard or soft ground. Also supplied is a device for easy picket extraction.

 

CLARK MASTS TYPE 73 FIELD MOUNTED 
PORTABLE MAST KIT FEATURES
1. Pan climatic
2. Maximum component weight is generally less than 20 kilograms
3. Capability: 8 to 30 metres, headload up to 75 kilograms

4. Erection example 20 metres: three persons with typical antenna, 45 minutes


Performance of a 20 Metre 
Type 73 Portable Mast, P/N 18134
Number of operators required 1 per 10 metres of height
Time to erect with 2 operators 40 Minutes
Time to lower & store mast 30 Minutes
Maximum Vertical Headload 60 Kg
Maximum Horizontal Headload 100 Kg


Clark Masts TYPE 73
Field Mounted Portable Mast Kit Optional Accessories

Clark Masts Type 73 portable mast accessories
Clark Masts Type 73 Series portable mast in RDF Deployment
Deployed in a Radio Direction Finding application, this 73 Series Clark Masts
field mounted portable mast is performing its part in Electronic Warfare.

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This page was last updated 14-01-2017


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