SMC carry a stock range of components which enables a simple tubular steel or tubular aluminium mast to be converted to a radiating mast for the 200kHz to 28MHz MF and HF bands. (Spot frequency or tunable with appropriate antenna matching unit).

Any of the masts described in our data sheets PA2 or TS series may be converted making a very versatile range of omni directional antennas from 6-30 metres in height, in 2”, 3” or 3½” diameters. For the lower frequencies (or where mast height is a consideration) a capacity hat arrangement may be included in the design for more efficient operation.

The SMC PA2 series of portable aluminium masts are particularly suited to transportable, portable or permanent use with the appropriate fittings, and the TS series masts are normally for permanent Installation.

The price quoted on this product page is for a typical low power AM antenna system (without antenna tuning unit which is available separately) with 60ft (18.29m) radiating alloy mast complete with erection kit, top capacity hat guy wires with insulator separators, T stake anchors, turned base insulator and portable radial earth system.

We can design and build you any AM radiating mast antenna to match your requirements.

Tubular Steel Specs

Height: 6 - 30 metres, 3" or 3½" diameter
Stays: HT galvanised steel wire or to customers requirements, to 120' or 90' in plan
Stay insert insulators: Ceramic loop stay or egg type and number to design height and power rating
Base insulator: 35/65kV wet/dry flashover fitted lighting spark gap arrestor, dependent upon power rating
Capacity hat: Normally included in stays or can be supplied separately in cadmium copper
Feed point: Stainless steel
All other fittings: Galvanised steel
Capacity: 450 - 1500 PFD dependant upon height and capacity hat design
Input impedance: 2 - 10 ohm, 50 ohm for 1/4 wave height

Aluminium Specs

Height: 4 - 18 metres
Mast diameter: 5Omm nominal
Stays: Normally 6mm diameter, pre-stretched polyester or galvanised steel with insulator inserts for permanent sites. Also available in Parafil, Keviar or Philistran
Base insulator: 15/30kV wet/dry flashover ceramic fitted lighting spark gap arrestor
Capacity hat: Included in top stay, hard drawn copper elements bordered to mast sections
HF feed point: Stainless steel
Capacity: 120 - 420 PFD (Power Flux Density)
Input impedance: 2 - 10 ohm, 50 ohm for 1¼ wave height

General Specs

Frequency range: 200kHz - 28MHz to design frequency or capacity
Bandwidth: Normally tuneable by antenna matching unit
Polarisation: Vertical
Radiator pattern H plane: Omni-directional
Input impedance: Normally in the range 2 - 10 ohm but 50 ohm for 1/4 wave height
Power handling: Up to 30kW

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