problem with Califone 1410K

hi,
i have aproblem with a califone 1410K.a friend of mine was about to send it to trash but i got it.the problem is that:i live in Turkey and we use 220V electricity.but califone works with 100V and i bought a converter from 220 to 110.califone needs 70W and my converter produces 100W.although checking everything in the phonograph,it turns a little bit slower than it should be.i used a stroboscobe and realized.i will be apriciated to anybody who can help me.what can the problem be?or where should i check in the phonograph?thanks.

The problem is that the frequency the motor runs at is 60cps and your power company is probably delivering 50cps which will cause it to run slower. You will have to increase the motor shaft diameter (with a spring?) to compensate or find a converter that changes the frequency as well as the voltage. Hope this helps.

Many phonograph companies used interchangeable motor spindles to convert players from 60 Hz to 50Hz. Either the motor spindle fitting, the motor shaft, or some intermediate wheel(s) are changed out to change the unit for line frequency.

50 Hz power makes a 60Hz motor spin at only 5/6 the speed it is supposed to.

is this formula practical,to get 110v 60hz:

wallplug 220vAC 50hz >>> adaptor, 12vDC >>> inverter, 110vAC 60hz >>> phonograph

All I can say is try it. It sounds like a plan. Let us know how you make out.

That's going to have to be one huge adaptor.

A phono motor is usually between 40 and 80 watts.

To provide 100 watts of power at 120 volts (about 1 amp), the 12-volt power adaptor is going to have to produce 10 amps at 12 volts. And this is not counting the power lost in the inverter.

We are talking a car battery charger with a car battery attached.

And most inverters don't produce a clean sine wave. A clean sine wave is needed to run a phono motor.

Finding the correct parts for the changeover might be easier.

So would a synchronous motor-generator set with a 6/5 speed pulley ratio and a 120 volt generator.

Frankly, for the low sound quality and high record wear from a Califone, I wouldn't bother. They were made to take the punishment of kids using them at schools, not fine reproduction of good records.

adapter-invertor project didn't work. the turntable turns as it before,low rpm,about 60rpm. then, i think there are two choices i have. to change the coil,as somebody says, to rebind it as it works with 50 hz or to change the idler wheel and may be the shaft. who knows? but i want it to work properly. where can i find a correct idler wheel? and another problem, does a wider or bigger idler wheel fix to its place? there can be friction between the idler wheel's rubber gasket and the walls of its place. tell me what should i do? except "throwing it away".

Changing the idler wheel diameter will not change the speed and may jam up the works. You need to increase the diameter of the motor shaft and this is usually done by simply fitting a spring snuggly onto the shaft. What size spring I don't know. I've seen it done before and the spring is forced onto the shaft ( it should fit so as not to slip on the shaft while turning). If there is any excess above the shaft you cut it off. You may have to try a few springs to get it right. The speed may not be dead on but you can get it pretty close. Some european manufactuers used to include a spring with instructions on how to install it on the shaft if you live in a 50hz area.

yes,the problem has been solved by adding a spring on the motor shaft. i had to use different diameters of springs because the shaft has 4 different diameters for each rpm, 78-45-33-16.
thank you very much to all who helped.