Capacitors for TD160

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jonrm
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Joined: 06 Aug 2013 19:38

Capacitors for TD160

Post by jonrm » 16 Feb 2019 04:37

Hi,
I am a novice at this, so forgive any frank stupidity.
I want to replace the 0.15uf capacitor on my TD160 to see if it addresses some motor problems
The one in there is a polarized electrolytic 0.15uf at 400V and 10%. I think that is stock?
I'm having a heck of a time sourcing a like for like replacement in both spec and size.

I have some old mullard "mustard" at 0.15uf, 400v and 10% - obviously these aren't polarized
(I also have some "tropical fish" at 0.15uf, 400v and 20%)

Would it be frankly rash to try and use any of them to run the motor?

If so, can anyone suggest a better replacement capacitor and point me at a supplier?

Is there any point in changing the resistor whilst I am at it? I have some 10k 5% carbon resistors to hand.

I could also replace the 2.2nf spark suppressor, (ceramic) but as it's not actually popping I'm inclined to leave that alone.

Thanks for any light shed in my darkness

bernard1
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Re: Capacitors for TD160

Post by bernard1 » 16 Feb 2019 10:46

jonrm wrote:
16 Feb 2019 04:37
I want to replace the 0.15uf capacitor on my TD160 to see if it addresses some motor problems
What problems do you have on your 160 ?
Is there any point in changing the resistor whilst I am at it? I have some 10k 5% carbon resistors to hand.

I could also replace the 2.2nf spark suppressor, (ceramic) but as it's not actually popping I'm inclined to leave that alone.
If it works, don't touch it. If your 160 runs on 110V the resistor is not even in use.

markcass
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Re: Capacitors for TD160

Post by markcass » 16 Feb 2019 13:07

jonrm wrote:
16 Feb 2019 04:37
Hi,
I am a novice at this, so forgive any frank stupidity.
I want to replace the 0.15uf capacitor on my TD160 to see if it addresses some motor problems
The one in there is a polarized electrolytic 0.15uf at 400V and 10%. I think that is stock?
I'm having a heck of a time sourcing a like for like replacement in both spec and size.

I have some old mullard "mustard" at 0.15uf, 400v and 10% - obviously these aren't polarized
(I also have some "tropical fish" at 0.15uf, 400v and 20%)

Would it be frankly rash to try and use any of them to run the motor?

If so, can anyone suggest a better replacement capacitor and point me at a supplier?

Is there any point in changing the resistor whilst I am at it? I have some 10k 5% carbon resistors to hand.

I could also replace the 2.2nf spark suppressor, (ceramic) but as it's not actually popping I'm inclined to leave that alone.

Thanks for any light shed in my darkness
Hi

I agree that you should leave the resistor alone. It looks as though you are thinking of using signal-level components in a mains (line) voltage circuit. This is not safe, and if you don't know what you are doing it's wise not to mess with these voltages anyway.

The stock capacitor is certainly not a polarized electrolytic, as this would have exploded long ago - the line voltage is AC not DC! Here's a link to a standard 0.15 µf motor run capacitor https://www.mouser.co.uk/ProductDetail/ ... y2HQ%3d%3d

HTH

Mark

jonrm
Posts: 4
Joined: 06 Aug 2013 19:38

Re: Capacitors for TD160

Post by jonrm » 16 Feb 2019 16:21

Thank you both. I spent last night trying to research capacitors, but just got very confused - as you can see!
In terms of the motor problem, it makes a slight knock/rumble sound. I suspect my motor is probably the problem, but I read on the forum elsewhere that a bad capacitor may contribute.
As the motors are very rare and expensive, I thought I'd at least try it, oiling didn't Help. (I did at least find instructions on how to oil it!)

jonrm
Posts: 4
Joined: 06 Aug 2013 19:38

Re: Capacitors for TD160

Post by jonrm » 16 Feb 2019 17:39

Hi,

I've put a picture of the capacitor. I wrongly thought the black band marked polarity. I didn't do that soldering!
Attachments
WhatsApp Image 2019-02-16 at 16.22.26.jpeg
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bernard1
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Re: Capacitors for TD160

Post by bernard1 » 16 Feb 2019 18:36

jonrm wrote:
16 Feb 2019 16:21
In terms of the motor problem, it makes a slight knock/rumble sound. I suspect my motor is probably the problem,
The knock knock sound on Thorens motors is a well known problem. Some people sell devices that stick under the motor and push the axis up, in order to solve this noise issue.

jonrm
Posts: 4
Joined: 06 Aug 2013 19:38

Re: Capacitors for TD160

Post by jonrm » 16 Feb 2019 19:12

Thank you again. I'll hold off doing anything radical then.
Saved me a lot of pointless effort, cheers.

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