NSM festival 130 serenade stereo magic 1967 restored and solved

hi you all an relative new on this forum and have a festival 130 stereo magic serrial number under 55001.

I am restoring it and so far everything is going great .

I was changing the capacitor under the record magazine 4 uf 150v and i see a resistor on the side wall with a wire to the capacitor.

The bracket that holds the wire in place was loos , and i tighten it .

Anyone a idea what the resistor does or in witch stand the bracket needs to sit ??

photo says it all . thanks for any answers !!!


regards ......nico from the Netherlands



5 mal bearbeitet. Zuletzt am 26.02.21 23:38.

this is the nsm festival am working on .

regards ....nico

Hello N,
the resistor is needed for the play Motor, looks like it is sitting in the right place.
Regards PitinWHV.

Thanks for your fast answer PitinWHV.

The resistor is variable towards the capacitor , any specification how to measure it or is that not that important ?


regards nico

Hello N,
look at the schematic, R46=200 Ohm, but I think its not so important.
Regards PitinWHV.

thanks for your input and knowledge , i just played a record and it works fine so thanks !! .

The motor is not hot and seems to work good .

Its working fine with one amplifier at this moment . The second amplifier still has some issues i need to take care off .


regards ....nico

hello to everyone and i need help again " fellow jukebox fanatics "

The play motor now gets too hot about 50 degrees.

So I have another question about the resistor that drives the motor in the turntable.

The resistor is variable with a slide that is connected to the capacitor with a wire .
i now measure 172.4 ohms between resistor and capacitor.

Does anyone have an idea what value to set it to? because i cant find any info on documents .

The capacitor is new 4uf 150v so thats not the problem .

kind regards nico

all problems are solved jukebox is playing fine now !!.

regards niko

Thanks for all the help .

The resistor and capacitor combination ist just a spark supressor for the switch connected to it.
The Value of the resistor should be something between 150 and 300 Ohms, when the capacitor is 4µF.

thanks phalos for your input !!

regards ..nico

Hello nico & phraros,
the purpose of resistor and capacitor is to provide a phase shifted current into one of the motorwindings.
Without that, the motor would not work. By swapping the windings with the reversing switch, the direction of rotation is changed. The value of the resistor has an influence to the power dissipation in the motorwinding (motor temperature), the motor torque and a small influence on the speed. I don`t know if there is any instruction how to set the value, but if the schematic says 200Ohm, I would set it to this value.
Rergards Jürgen

Are you sure?

I am pretty sure that the direction is changed by either letting the current flow through the right or left wire, then through the motor and "out" the brown wire at the bottom.
Yet I don't know the whole schematics.

Yes, see "capacitor motor". Maybe I confused you by not coloring the bottom connection of the motor which carries both currents.
Regards Jürgen

Hallo P,
das ist Quatsch, da gibt es keine zu löschenden Funken.
C ist der Phasenschieber, siehe Jürgen02.
Gruß PitinWHV.

Quote
Phalos
The resistor and capacitor combination ist just a spark supressor for the switch connected to it.
The Value of the resistor should be something between 150 and 300 Ohms, when the capacitor is 4µF.

Das ist kein Quatsch. Überall dort wo größere induktive Lasten geschaltet werden entstehen Funken die im besten Fall durch ein R-C-Glied oder eine Freilaufdiode gelöscht werden.

Quote: "Yes, see "capacitor motor". Maybe I confused you by not coloring the bottom connection of the motor which carries both currents.
Regards Jürgen"

Ahh I see, thank you :)



1 mal bearbeitet. Zuletzt am 27.02.21 20:05.

Hallo P,
und was ist in diesem Fall die große induktive Last.
Gruß PitinWHV.

Thanks for the information gentlemen.

in this post "NSM Serenade Festival 130 - Frage zum Motor"
I read this information carefully, after asking you the question here if there was a setting for the adjustable resistor and capacitor.

So my statement that the engine overheated is apparently incorrect.
According to the information I have read.

The situation at the moment is that the jukebox has perfect sound and plays well.
The only thing that strikes me at the moment is when I play A sides of records, the motor hardly gets hot.

when I only play b sides, the motor gets around 50 to 60 degrees.

now i have read that this does not have to be a problem with the old engine of the 130 festival.

And if it could cause a problem ? , how can I solve this? , by sliding the resistance up or down ?? , or is it just the way it is supposed to be now?

as I mentioned earlier I measure on the wire of the capacitor that is on the resistor at the position as the picture shows 172.4 ohms. (the resistance would be 200 ohms with the control bracket at zero ?).

Or need i to set it at 200ohm on the bracket of the resistor ?
A lot of questions , but i want to be shure i wont burn the motor .

Apparently there is nowhere information on how to set the adjustable resistance and to which values.

kind regards, nico



1 mal bearbeitet. Zuletzt am 27.02.21 22:08.

Quote
pitinwhv
Hallo P,
und was ist in diesem Fall die große induktive Last.
Gruß PitinWHV.

Der Motor? Dicke Spule, großer Eigenkern?

Hello Nico,
if you measure 172Ohm between the violet and green wire, then I would guess the resistor has approx 500Ohm in total. (between upper and lower terminal)
You can increase the value by sliding upwards. This will reduce the power dissipation in the motor winding but the resistor will get hotter. The motor torque will be also reduced and the motor may not start anymore at a certain point. Again, if there is no instruction or no better idea, put it to 200Ohm as mentioned in the schematic. 50-60degC should not be a problem for the motor.
Best regards Jürgen



1 mal bearbeitet. Zuletzt am 28.02.21 08:44.

hi Jürgen ,

Thanks for your excellent information .

I guess ill set it to 200 ohm between the violet en green wire .

Thanks to everybody on this forum that was kind enough to help me out , specially to jens who make it so easy to restore the amplifiers !!

Without this help i don't think i would get so far as i am now !!



1 mal bearbeitet. Zuletzt am 01.03.21 07:48.