I'd check for rust, corrosion, or damage to the feedscrew.
----- Original Message ----- From: "Ron L'Herault" <lhera...@bu.edu> To: "'Antique Phonograph List'" <phono-l at oldcrank.org>; <phonolist at yahoogroups.com> Sent: Monday, September 01, 2008 11:50 AM Subject: [Phono-L] Amberola 30 erratic speed > OK, gang, it is time to tap into the lists' wisdom. I'm working on an > Amberola 30. The hook came unsoldered and the reproducer needed a > rebuild. > Those two easy repairs (the spring was in the case)completed, I tested the > phonograph and found that the speed is a bit erratic. It will sound nice, > then slow just a bit then return to speed for a while only to slow again. > The carriage moves easily and the horn bobbles and rotates as it should. > The governor is lubricated and the pad has been oiled. There is no > evidence > of crud or damage to the governor disk. There were a few teeth on the > large > hear that had a bit of damage but a bit of judicious filing has cured the > noise the damage created, and besides, the speed variation is more random > than the cycle of the gear noise. I'm thinking that the mainspring may > need > to be removed, cleaned and re-lubricated but I thought I might see if > there > is anything else I missed before tearing it apart. > > Thanks, > > Ron L > > > _______________________________________________ > Phono-L mailing list > http://phono-l.oldcrank.org >
