AD270 AD370

Active Antenna Systems

There were two later versions of the wideband active antenna.

AD270 was the indoor version.

AD370 was designed for outdoor use.

Many thanks to Dominique Kremp who supplied a copy of the instructions, also to David (G8SZX) for photographs and details of the IB5 and Wim (PA3ALG) supplied a schematic of the head unit.

An improved design by Chris Trask can also be found in the manuals section.