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UK Broadcast Transmission |
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THE TRANSMISSION GALLERY
| Photos by John P Martin | Page last updated: 2022-03-21 |
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| In January 2022 I published pictures of the Dalwhinnie (self-help) transposer Tx site. I have now been able to visit the Rx link site which fed this self-help transmitter. This operated as an Active Deflector of Rosemarkie. |
| Starting right at the top, here's the RX aerial. This is as close as I could get due to the deer fence. |
| The RX aerial is a domestic Yagi and is horizontally polarised, matching the polarisation of Rosemarkie, its designated parent station. |
| This is still an exercise in optimism, but it must have worked! |
| About 150m down the hill from the RX aerial, the cable passes over a burn and under the forestry track in this metal pipe ... |
| ... the cable leads into the Transmitter Hall ... |
| ... which is remarkably well preserved ... |
| ... and still contains the equipment, which at some point was upgraded to be run from mains power. The original was battery powered. |
| The incoming aerial cable goes through a Triax power inserter for the mast-head pre-amp.... |
| ... then into the first of a pair of Taylor modules, with their PSU over on the left. |
| The top module is a 40dB pre-amp with AGC. The lower module is the power amplifier which I guess has a maximum output power of about 1 Watt but is not labelled in any way. |
| The TX signal then exits the Transmitter Hall to another domestic Yagi (VP), pointing northeast to the transposer site. |
| Looking northeast over Loch Ericht and Dalwhinnie from the site. |
Dalwhinnie (self-help) | Rosemarkie
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