Construction

The Warsaw radio mast was a guyed steel lattice mast of equilateral triangular cross section, with a face width of 4.8 m. The vertical steel tubes forming the vertices of the mast had a diameter of 245 millimetres; the thickness of the walls of these tubes varied between 8-

-and 34 millimetres depending on height. The mast consisted of 86 elements, each of which had a length of 7.5 metres. The mast had 3 arrays of guy wires, each attached to the mast at 5 levels, 121.78 metres, 256.78 metres, 359.28 metres, 481.28 metres and 594.78 metres above ground. More...

Collapse

On 8 August 1991 at 16:00 UTC a catastrophic failure, caused by an error in exchanging the guy-wires on the highest stock, led to the collapse of the mast. The mast first bent and then snapped at roughly half its height. The helix building and the transmitter building (including the transmitter devices in it) were not damaged.

An investigating committee determined that blame lay with Mostostal Zabrze, which built and maintained the mast. The construction coordinator and the chief of the Mostostal division that built the mast were accused of causing the collapse. The former was sentenced to two and a half years in prison, the latter to two years More...

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Replacement

After the collapse of the radio mast at Konstantynów, the Polish broadcasting company used the old Raszyn transmitter with its 335-metre-high mast near Warsaw, which had been used since 1978 for daytime transmissions of a second Polish broadcasting service programme in the longwave range on the frequency 198 kHz, for transmissions on 225 kHz with a power of 500 kilowatts.

It is not possible to transmit from Raszyn on 198 kHz and 225 kHz simultaneously, so the transmissions on the second longwave frequency 198 kHz had to be discontinued until either a second longwave broadcasting transmitting facility was built in Poland or a special frequency switch, which would allow transmissions on both frequencies, was installed at the Raszyn transmitter. More...

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CurrentState

Except for the mast and the radio frequency transmission line that led to it, nearly all components of the facility remain in place, unused and slowly deteriorating.

There are several plans to transform the former transmitter building into a technical museum. In spite of the historic importance of the site, there is no support for this idea from officials.

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