Re: HMV Model 120
That's an interesting historic museum piece - according to the service data it could be as old as 1934, which would make it one of the world's first autochangers.
A couple of questions/suggestions:
1. The service data suggests that the motor, depending on the model, might be rewirable for 230V. If the motor was set up for 125V, what about the electronics?
2. The spring mechanism on the spindle sounds like the 'antislip' device. Disc slip may well have been a problem with that heavy HMV pickup bearing on the top record. Might be worth trying to disable the spring to allow the record to drop and then checking for slip. Back in those days, I think that 78s were heavier than later post-war records, so might have actuated the device more readily. Otherwise, I can only suggest that the anti-slip device be freed off as much as possible.
Martin
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