Am 10.08.2021 um 17:56 schrieb Mark Carver:
> Bilsdale (like Mendip, Belmont, Winter Hill, Waltham, and the ill fated
> Emley mast) are enclosed tubular steel construction.
> Quite unstable in certain conditions as two of those masts have had
> collapses (as have similar masts in Germany and The Netherlands)
On 15 January 1985, the tubular steel tower "Bielstein (Teutoburger
Wald)" of WDR in Germany collapsed in the early morning hours. The tower
was 298 metres tall; there was no fire, but it collapsed due to high
winds and icing of the guy wires. At that time I was a student in
Münster and got my wake-up call from the radio. On that morning the the
radio suddenly went silent before half past six. I switched to another
frequency, only to learn of the reasons for the transmitter failure in
the news bulletin at 7. The background is described here:
(page 13-, in German, but with
plenty of pictures).
Notably, the main FM service on 93.2 MHz was back on air 8 hours later,
using a backup transmitter of BFBS in Bielefeld, some 30 km northwest of
Bielstein. It took a few more days for the WDR engineers to install a
backup tower at Bielstein and more than a year to replace the original
tower with a steel lattice construction of 302 metres.
By the way, BFBS has stopped broadcasting from Bielefeld only in spring
2020, after most of the British troops had left the area.