Pennar stands on a hill just to the south of Newbridge, in Ebbw Vale. It employs two stacks of four panel antennas for UHF TV, one stack pointing roughly north, the other roughly south-east. This should produce a broadly semicircular radiation pattern covering areas along Ebbw Vale including Abercarn, Newbridge and Crumlin, and west towards Pontllanfraith. The RX antenna is a vertical log periodic pointing south towards Mynydd Machen, which is clearly visible from the site.
Pennar is also an FM filler for BBC Network Radio. Mounted just under the UHF stack is an omnidirectional VHF array comprising four panels, one on each face of the tower. Each panel consists of two vertical dipoles side by side. The RX antennas are two vertical log periodics, pointing just east of north. The station uses Abertillery for its programme feed. BBC FM radio entered service on 19th April 1991.
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