Wayne Kerr VHF admittance bridge B801, serial number 714, with box of spares. The Wayne Kerr VHF admittance bridge B801 could be operated at any frequency from 1-100MHz for the simultaneous measurement of the capacitance and conductance of aerials, feeders, lines and components, whether balanced or unbalanced.

A wide measurement range was available from only a few Standards whose effective values were extended by the use of ratio transformers. This technique permitted the values of the Standards to be selected for maximum stability and minimum phase-angle.

A number of accessories were also provided by Wayne Kerr Laboratories.