Thorens TD135 / TD124 Capacitor Query

bluetomgold · 6th October 2005, 03:11 PM

Hi,

I'm currently rennovating and modifying an old thorens td135 (little brother of the TD124) and have come up against a small problem. The capacitor connected across the motor terminals is partially melted and measures a really low value. Remarkably, the motor is still running well, but I was going to replace it to be on the safe side. Does anyone know what value/type of cap I should use? I can't find any info on the web, and unfortunately it's melted where the value was written!

A picture of the old cap's attached.

I've noticed from the result of my web searches that the TD124 uses a resistor as well as a cap in the PSU circuit. Would this kind of circuit be worth implementing in the 135, or shall I stick to the original for the sake of simplicity. If it sounds any good once I've finished the plinth etc. I might consider some sort of external "armageddon" type PSU.

Any thoughts and help would be much appreciated!

Tom

analog_sa · 6th October 2005, 09:59 PM

Quote:

I've noticed from the result of my web searches that the TD124 uses a resistor as well as a cap in the PSU circuit

The only cap in the 124 is across the power switch - no cap is used on the motor as it is not synchronous.

bluetomgold · 8th October 2005, 05:32 PM

Yes, I beg your pardon, that's the one, across the switch. Just had a look in another TD135 and it's got the following markings:

630V--d
665 - A
FZNT
61/7

I'm still none the wiser as to what this means in terms of modern/conventional values. The one in mine is a different cap, rated 1000v, but the microfarad rating is melted. Any help would be much appreciated!

analog_sa · 8th October 2005, 06:16 PM

I think it's 10nF. The value is really not critical as the only purpose of the cap is to reduce the switch noise.

6th October 2005, 03:11 PM	#1
bluetomgold diyAudio Member Join Date: Dec 2003 Location: London	Thorens TD135 / TD124 Capacitor Query Hi, I'm currently rennovating and modifying an old thorens td135 (little brother of the TD124) and have come up against a small problem. The capacitor connected across the motor terminals is partially melted and measures a really low value. Remarkably, the motor is still running well, but I was going to replace it to be on the safe side. Does anyone know what value/type of cap I should use? I can't find any info on the web, and unfortunately it's melted where the value was written! A picture of the old cap's attached. I've noticed from the result of my web searches that the TD124 uses a resistor as well as a cap in the PSU circuit. Would this kind of circuit be worth implementing in the 135, or shall I stick to the original for the sake of simplicity. If it sounds any good once I've finished the plinth etc. I might consider some sort of external "armageddon" type PSU. Any thoughts and help would be much appreciated! Tom

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8th October 2005, 05:32 PM	#3
bluetomgold diyAudio Member Join Date: Dec 2003 Location: London	Yes, I beg your pardon, that's the one, across the switch. Just had a look in another TD135 and it's got the following markings: 630V--d 665 - A FZNT 61/7 I'm still none the wiser as to what this means in terms of modern/conventional values. The one in mine is a different cap, rated 1000v, but the microfarad rating is melted. Any help would be much appreciated!

8th October 2005, 06:16 PM	#4
analog_sa diyAudio Member Join Date: Aug 2002 Location: Sofia	I think it's 10nF. The value is really not critical as the only purpose of the cap is to reduce the switch noise.

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