A transparent plastic enclosure containing an electronic device with wires, coils, and metallic components inside.

£200 + postage

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ATU (Aerial Tuning Unit)

High Power

This Aerial Tuning unit is housed within an ABS IP67 Waterproof box with the size 300x200x130mm. A sealed door is on the front.

It is a simple L-C design which can be used with any Transmitter to match a long wire of random length.

Good results have been achieved at the top end of the Medium Waveband and with an 18-metre-long wire. An earth stake fitted for local Earth connection.

Instructions
Open electronic device containing a large copper coil, a smaller metallic component with fins, and various colored wires inside a metal enclosure.
A scientific device with a white base and a transparent cover, containing a large copper coil, a white component with a red wire, and various connectors inside.
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ATU Low Power

For up to 5 watts RF

£70 plus postage

This Aerial Tuning unit is mounted on sheet aluminium  with the size 75x100 by 85mm deep.

Suitable for the 1 Watt and 4 Watt Transmitters. 

It is a simple L-C design which can be used with any Transmitter to match a long wire of fairly random length.

INSTRUCTIONS