UKForth 1
FM
On the map
Where Forth 1 is radiated from — 3 transmitters [V], Ofcom's published positions. This says nothing about how far the signal reaches; it is not a coverage map.
FM
| Transmitter | Nation | Frequency | ERP (H) | ERP (V) | Height | RDS name | PI code | Area |
|---|---|---|---|---|---|---|---|---|
| Craigkelly | Scotland | 97.3 MHz | 4.9 kW | 4.9 kW | 119 m | Forth_1_ | C4B1 | Edinburgh |
| Penicuik | Scotland | 102.2 MHz | 250 W | 250 W | 40 m | Forth_1_ | C4B1 | Penicuik |
| Black Hill | Scotland | 97.6 MHz | — | 100 W | 225 m | Forth_1_ | C4B1 | Edinburgh |
Radiation pattern
Craigkelly publishes the strongest FM signal for this station with a shape on record — where it is carried elsewhere too, this is not necessarily theirs.
Radiates most strongly toward the south (160°), as published by Ofcom.
More detail
Each ring is 10 dB of attenuation below the pattern's own peak; the outer rim is the peak itself and anything 30 dB down or deeper is drawn at the centre rather than off the edge of the chart, so a very deep null reads as “weak” and not as a hole in the picture. The shape says which direction radiates harder relative to the mast's own peak, not the absolute field strength there or how far it reaches — that is what the coverage map and the postcode lookup are for. Solid is horizontal polarisation, dashed is vertical.