So OK my second set of Ritchie HV-77s seems to be failing. Appears that 13-14 years is the best I can get out of them.
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It appears they are being replaced with SR-2
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using HV-77 to SR-2 Adapter

are there any great alternatives out there that are cheap?
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Ritchie HV-77.jpg (31.43 KB, 1874 downloads)
HV-77