2015 update
Visited the KNOM site recently. LED illumination holding up well; Nautel ND25 suffered from lightning strike and lost several diodes in the power supply. Plenty of spares on hand so no big issue. Replacements? Very spendy from Nautel and other "normal" sources but cheap on Alibaba and what were shipped were US made, reputable maker. Transmitter is now 19 years old and still reliable.