Repair now underway. It seems one driver is original and the other not. The original does not have ferrofluid, as it had not been invented at the time. A different lubricant, such as a grease, was used. At some point one driver failed and was replaced, the new unit utilizing ferrofluid.
The drivers are having spiders and surrounds rebuilt, the one with hardened/tacky ferrofluid has been cleaned, and both will be reconditioned with new ferrofluid. My understanding was that the original units were prone to failure, but the addition of ferrofluid ameliorated that problem.
I may have reconditioned Ohm Walsh Model F’s for Christmas! That would be fun! :)
The drivers are having spiders and surrounds rebuilt, the one with hardened/tacky ferrofluid has been cleaned, and both will be reconditioned with new ferrofluid. My understanding was that the original units were prone to failure, but the addition of ferrofluid ameliorated that problem.
I may have reconditioned Ohm Walsh Model F’s for Christmas! That would be fun! :)