I am working on my daughters Marantz 1977 player piano. I've got some ac type buzz in the 170 volt dc solenoids. I figure that the filter cap is bad (Sprague suggests 1000 hour life span, so 1977 to 2007 that's 30 years, so
1000 divided by 30 = 33 hours per year,, bet its got more then that, not to mention just the drying effects of age!!!) I've tried to find them, new, but can seem to get the internet to work for me today.... So what vendors would you all suggest?????here are the details of the cap
Sprague powerlytic
36d 16000-200dc 7834l 3104 made in the USA.I am guessing that 78341 is a date code, Interesting that the sales slip on the piano is 1977....
Thanks in advance Bob in phx.