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Radio 270 - Technical


Radio 270 News Booth/Recording studio Radio 270 main studio

Top: the main studio on board Oceaan VII

Below: the News booth/recording studio

Radio 270 transmitter Aerial mast on Oceaan VII

Left: the aerial mast on board Oceaan VII

Below: the Radio 270 transmitter


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Studio

There were two on-board studios - one for  programme presentation and one for news and recording.

The programme presentation studio contained

a control panel

1 x Revox tape deck

1 x  EMI studio tape recorder

2 x Garrard turntables

The news booth/recording studio contained a domestic Grundig tape recorder

Transmitter

10Kw RCA BTA 10J1 transmitter

Aerial

The original aerial - installed when the ship was fitted out in Guernsey - was 161' (49m) high (from deck level).

The top 100’ (30.5m) was a welded-section alloy Sparlight yachting mast and the bottom 61’ (18.6m) was an alloy test mast from the racing yacht Norsaga. The top 100’ (30.5m) collapsed at sea in April 1966.

The replacement (installed in Grimsby) was 151’ (46m) high (from deck level). The top 90’ (27.4m) was a welded-section alloy Sparlight yachting mast, mounted on the originally installed alloy mast from the racing yacht Norsaga.

The station claimed an aerial height of 154’ (46.9m) - measured from sea level.

The aerial was of the vertical wire cage series feed type



Thanks to Ian Anderson for providing information from his research into offshore radio aerial masts (originally published in Offshore Echos Magazine December 2007 and April 2008)