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Transmitter 1: BBC 2: Digital 3 & 4 A: SDN B: BBC C: NG Wireless D: NG Wireless Gp Pol OS grid ref. OD
m Field
dBµV/m Distance
miles Bearing
degrees Antenna
(suggestion)
UHF ERP
W AOD
m UHF ERP
W AOD
m UHF ERP
W AOD
m UHF ERP
W AOD
m UHF ERP
W AOD
m UHF ERP
W AOD
m
Sandy Heath 42 20k 267 45 20k 267 43 20k 267 67 20k 279 40 20k 267 46 20k 267 E H TL204494 55 58 11 351 Log periodic
Crystal Palace 25 20k 321 22 20k 321 32 20k 321 28 20k 321 34 20k 321 29 20k 321 A H TQ339712 110 28 38 170 Amplified extra hi-gain
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Re: ariel fitting
'Amplified extra high gain' is the critical information. That's the aerial type it's recommending, and to be honest it sounds like the aerial you have is not a million miles away from being the right one.
At this stage I think the best thing you can do is what you have just done anyway - get a professional in!
But the signal strength from Sandy Heath (only 11 miles away) is expected to be much greater than that from Crystal Palace (38 miles away). For this transmitter it recommends a group-E, log-periodic aerial and not a group-W, yagi which is what the OP has.
Would that be professionally (telecommunications), military (fairey) or Radio Amateur?
Former RAF L.Fitt.GC/L.Tech.TC (Airfield Comms VHF/UHF, Long Haul HF,Satellite, SAR Comms, Microwave Relay), Home Office Directorate of Telecommunications/DTels (then sold as chattel to NTL who stripped assets and closed us down ).
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