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UK Broadcast Transmission |
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THE TRANSMISSION GALLERY
BILSDALE MK1
| Photos by John Rhodes | Page last updated: 2024-03-30 |
| Bilsdale ITV was a parallel pair of Pye 25kw transmitters. In 1975 the A transmitter caught fire owing to a fault in its HT transformer. Both transmitters went off the air, the B transmitter having clogged air filters. Service was maintained for many months at half power on only the B transmitter, initially with no reserve capability. This fault had ramifications for all other IBA 25kw transmitters. |
| After an extensive cleanup, the photo shows a vacant space at the far end of the transmitter hall. |
| As a temporary measure until Pye made a replacement 25kw, an 11kw Marconi transmitter destined for Brougher Mountain was installed in the storeroom. |
| This photo shows the Marconi switching frame adjacent to the lighter grey Pye frame. The Marconi frame contained a motorised coaxial changeover switch to which both 25kw and 11kw were connected. The Marconi frame also contained the 11kw sound/vision combining unit fed by the two vertical 3 1/8 inch feeders. The larger of the copper-coloured cans was one of a pair of sound resonators, whilst the smaller one was an image subcarrier resonator (fv-4.43mhz). The horizontal insulated pipe was the steam pipe from the 25kw to its heat exchanger through to the right. |
| A hole was cut into the outside wall and fitted with a temporary wooden vent for inlet and outlet, against which the Marconi cooler unit butted inside. |
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