Maintenance of the KPH/KSM antennas, once looked after by a fleet of fearless riggers, is now the responsibility of MRHS volunteers. While there are many fewer antennas than there were during the glory days of the combined point-to-point and marine services there are many fewer of us as well - and we're not quire as fearless. Repair and restoration of the antennas themselves is beyond the limits of our ability, requiring work at levels from 50ft. to 70ft. and more. But we can reach the feed lines, which require frequent attention as well.
These photos show feed line maintenance at the Bolinas transmitter site and the restoration of a run of 4-wire feed line at the Pt. Reyes receive site. We had to teach ourselves how to work with the 4-wire lines but we think we now have the only working example of this technology, in North America at least.