In accordance with FCC 08-228 Second Report and Order and the Second Further Notice of Proposed Rulemaking released on September 26, 2008, Section 73.151 of the FCC rules entitled “Directional Antenna Performance Verification” was modified to add among other things the following: “Samples may be obtained from base voltage sampling devices at the output of the antenna coupling and matching equipment for the base-fed towers whose actual electrical height is greater than 105 degrees”.
The Kintronic Labs Model VSU-1 and VSU-1HV were developed in response to this new FCC Report and Order and have now been installed in several AM directional stations in the US to facilitate Method of Moment (MOM) proofs of performance of these respective arrays. The voltage rating of the Model VSU-1 is 20kV peak, and the voltage rating of the Model VSU-1HV is 30kV peak. The VSU units are supplied in aluminum weatherproof enclosures with keylocked entry door, provisions for installation on a single vertical upright and off white paint finish. The output connector is a Type N female. The VSU design has proven to be very robust having not realized any damage during a direct lightning strike on the tower to which it was connected.