"hatbox" 78 rpm record player

[radiotvnut]

The majority of the single tube models of the '50's and '60's are that way. The motor is usually 90V and the tube filament is usually 25V; which, adds up to 115V. On models such as this that I've added a preamp tube to, I use a 6AV6 (it's filament has the same current rating as the 25L6 and bumps the total of the series string up to 121V). With today's higher line voltages, it will still work fine this way and even if the line voltage is a little low, it will still work; but, may take a little while longer to warm up.

When solid state models came along, there was often a secondary winding on the motor in order to provide low voltage for powering the amp.