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Construction of new mast The old tower Inside the station & 405 switch off The Transmitter An Open Day
Pye Green Tower Test Card Records contacts and links
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Inside the Station |
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(Click on a picture to enlarge then 'back' on your browser to return) (left) The Control Room (right) Stan, Bob's colleague makes an adjustment to the PO 2000 Mhz radio link whilst the GEC Installer looks on |
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(left) Bob Cotton pictured (stooped) with Stan checking test equipment (right) Part of the Post Office Room
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(right) ITA Engineers in Canteen Garth Lawley on the left, took the hair raising photos from the mast
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ABC Television's first weekend programme schedule 18 -19th February 1956 |
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Bill Arnold was the IBA Area Engineer at the time of the closure of the 405 line transmitter in 1985 and took film of it and it's dismantling, also of what I think was his retirement in 1988. In the centre is a still from the film of Mr. N. G. Payne E.I.C. turning off the transmitter 24 years after he had laid the bearing for the mast.
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Announcements 1985 The close down of 405 including an interview with Bill Arnold |
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Below Bill Arnold's Film plays all 3 parts continuously or mouse over to select parts
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Part One ending with 405 shutdown with test card music
Part Two Starts with the dismantling of the Transmitter
Part Three Starts with Crawley Court the IBA's Engineering and Research Dept. and ends with Bill's retirement in 1988
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click on the screen if you prefer to view it on the 'You Tube' site where you have more options e.g. full screen |
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Post Office Microwave 2000 Mhz Radio Link Used via dishes to receive programmes from Birmingham and to send outside broadcasts back to Birmingham two channels were on continually one as back up.
Left (top) and Right (underside) view of Oscillator chassis from Lichfield, this one removed when the link was upgraded. If you look at the earlier photos you can see the racks where this was situated. manufacturer GEC (Britain)
2000Mhz amplifier with tuning controls, (the oscillator was a similar unit) the valve is under the cap left (see enlargement)
(right) this one was presented to Bob on his retirement in 1986
The valves used were very unreliable and only one in ten would work! the tuned circuit had to be reset when the valve was replaced and involved three adjustments gain, anode, cathode/grid (see enlargement )
(right) view of valve in position
(left) view of the valve
please click on each picture to enlarge and then "back" on your browser to return
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Right Bob sometimes went on relief to work at Turners Hill (Dudley) where the PO's radio link from London came in, at one time this was an earlier 900Mhz link, this is a valve from that system. the bottom view shows the fins for the air cooling system
Left Microwave Power Meter c.1975 Hewlett Packard Model 430C
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Construction of new mast The old tower Inside the station & 405 switch off The Transmitter An Open Day
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