The Glyncorrwg relay is located 300m up the Western side of the valley (Glyn Corrwg), and provides TV to the town of the same name. Glyncorrwg is in a isolated valley, completely surrounded on all sides by mountains and forests, the only way in or out by normal means is the road to Croeserw. Even at this elevation reception is still difficult here, as demonstrated by there being 3 times as many log periodics used for reception than for transmission!
A single pair of crossed logs are used for transmission purposes. There are then 4 vertical logs pointing toward Croeserw, and then another 2 horizontal ones. I can't think where these two horizontal receive logs are trying to pick up? They look slighty off-beam, by only a couple of degrees, to the vertical ones. Surely these can't be for the very low powered (now only 2W!) horizontal component to Croeserw's output? But where else if not?
[Ed]. I think that the most likely scenario is that during the commissioning of Glyncorrwg (probably late 1983), it was discovered that there was a problem obtaining clean reception of Croeserw's vertically polarised transmissions. The horizontal transmissions at Croeserw were added in December 1983 and are aimed in the direction of Glyncorrwg. Glyncorrwg entered service on the 1st March 1984. I suspect that they simply never bothered removing the four vertical receive logs. |
