This is part of the final amplifier unit from the Marconi Company 17kW television transmitter used at the BBC’s Alexandra Palace station for the world’s first public high-definition television service introduced in 1936. The service was run from 1936 to 1956 excepting one-year’s stoppage during the Second World War.

This is part of the final amplifier unit from the Marconi Company 17kW television transmitter used at the BBC’s Alexandra Palace station for the world’s first public high-definition television service introduced in 1936. The service was run from 1936 to 1956 excepting one-year’s stoppage during the Second World War.

This is part of the final amplifier unit from the Marconi Company 17kW television transmitter used at the BBC’s Alexandra Palace station for the world’s first public high-definition television service introduced in 1936. The service was run from 1936 to 1956 excepting one-year’s stoppage during the Second World War.

This is part of the final amplifier unit from the Marconi Company 17kW television transmitter used at the BBC’s Alexandra Palace station for the world’s first public high-definition television service introduced in 1936. The service was run from 1936 to 1956 excepting one-year’s stoppage during the Second World War.