FM and DAB aerial tests approximate dB gain differences 85% L10 542H

FM and DAB approx aerial gain differences
Such is the Black Art nature of RF all aerial test readings are approximate, in fact as far as I know no lab will guarantee accuracy better than +/- 0.5dB.
It must be admitted that these particular results are less accurate than that (unlike our TV aerial tests) but they still give a pretty reliable indication of the relative performance of the various antennas.
The “variable” figures result from the directional nature of the particular aerial. This doesn’t apply to the TV aerials, they’re variable because they’re not even designed to pick up VHF frequencies !
Note that if the 3 element aerials were pointing directly away from the transmitter you’d probably lose more than the - 5dB quoted for the FM3. Though you would be pretty unlucky if you were to align your aerial like that !

 

Aerial tests full results - ATV stock A group v typical BacoFoil XB10WB 490H

ATV aerial tests full results :

our stock A group aerials v a typical Bacofoil XB10WB relative to a DM Log.

Also see approximate gain curves of these aerials.

Aerial tests full results - ATV stock B group v typical BacoFoil XB10WB 75% L20 89kB 738H

ATV aerial tests full results :

our stock B group aerials v a typical Bacofoil XB10WB relative to a DM Log.

Also see approximate gain curves of these aerials.

erial tests full results - ATV stock K group v typical BacoFoil XB10WB 75% L20 89kB 719H

ATV aerial tests full results :

our stock K group aerials v a typical Bacofoil XB10WB relative to a DM Log.

Also see approximate gain curves of these aerials.

Aerial tests full results - ATV stock E group v typical BacoFoil XB10WB 75% L20 89kB 738H

ATV aerial tests full results :

our stock E group aerials v a typical Bacofoil XB10WB relative to a DM Log.

Also see approximate gain curves of these aerials.

Aerial tests full results - ATV stock wideband group v typical BacoFoil XB10WB L25 744H

ATV aerial tests full results :

our stock wideband aerials v a typical Bacofoil XB10WB relative to a DM Log.

Also see approximate gain curves of these aerials.

Aerial tests full results - all grouped Yagi18s v typical BacoFoil  XB10WB 75% L30 844H

ATV aerial tests full results :

All the grouped Yagi18s v a typical Bacofoil XB10WB relative to a DM Log.

Also see approximate gain curves of these aerials.