Trouble finding spare capacitors

[AshB123]

Hi.
I’ve just acquired a couple of Whatfedale DX-2 Satellite speakers for my surround sound system.

After wiring them in to my system and finding that they didn’t work, I decided to take them apart to see what the issue was.

Turns out, whoever had them before I acquired them had obviously turned them up too high, and had blown a capacitor in both speakers.

I’ve included a picture of the capacitor in question. I cannot seem to find one anywhere to be able to them.

Any help would be greatly appreciated.

Thanks in advance.

AshB123

 

[rayma]

Just use a 33uF 50V bipolar, which are readily available.

 

[AshB123]

Thank you for the quick response.

Is there any particular one that I should be looking to get?

 

[AshB123]

Also, does it matter if I go from a 50v to a 100v one? Or will that not work?

Thanks

 

[krivium]

As long as voltage is bigger it'll be ok.
No particular one, 33uf/35V( or more) non polarised electrolytic.

 

[tuantran]

Mundorf Mlytic 33.00uF 100Vdc non-polar electrolytic capacitor.
https://www.partsconnexion.com/MUNDORF-71873.html

 

[AshB123]

Thanks

after you said that they’re readily available. I cannot find them anywhere. I found 1, which had a lead time of 32 weeks, haha

 

[AshB123]

Mundorf Mlytic 33.00uF 100Vdc non-polar electrolytic capacitor.
https://www.partsconnexion.com/MUNDORF-71873.html

Thanks for the link, I'm in the UK though, so I'd rather order from a uk supplier

Thanks again though

 

[starkeyg]

Hello,

Personally I would use 33uf 80 or 100 volt caps as these did blow. Panasonic SU caps, bipolar are decent quality and likely available. Digikey.com was one source I have used.

Regards,
Greg

 

[AshB123]

Hello,

Personally I would use 33uf 80 or 100 volt caps as these did blow. Panasonic SU caps, bipolar are decent quality and likely available. Digikey.com was one source I have used.

Regards,
Greg

That's where I've been looking, none in stock unfortunately, and they have a 32 week lead time, I guess I'll have to wait, haha

 

[SpeakerBob]

https://www.falconacoustics.co.uk/a...capacitor-nonpolarised-reversible-series.html

 

[AshB123]

Thanks. I’ll give that link a go. 👍🏼

 

[SpeakerBob]

I think you can pay a bit more and they will measure and send a matched pair. You could try an email and ask for a 32uF pair.

 

[krivium]

https://www.toutlehautparleur.com/a...densateurs-monacor-lsc-330np-33uf-100vdc.html

You can add capacitors in // to reach your desired value if needed ( as long as you have space to locate them in the box): 2x15uf+1x3,3uf will do.

I would not overate them ( the voltage the capacitor accept) too much as they'll survive a blast from the amp but your drivers will probably not... if they acted as a fuse this isn't that bad: drivers are (maybe) unobtainable, capacitors are not.

 

[AshB123]

Thanks for all your help guys. I found some at www.cricklewoodelectronics.com

not the exact Voltage, but they’ll do to try and get them working.

I’ll post about how successful the repair is when I get around to it. Haha.

 

[system7]

Are Cricklewood Electronics still there? Top of Shoot-Up Hill on the Edgware Road in London? Very interesting shop. Often would I rummage in their bargain bins. 🙂

I have CONCERNS about your attempted fix here. Thing is you say the speakers don't work. What? Not at all, or badly?

A blown (open) 33uF capacitor on the bass shunt would still have them working after a fashion.

The circuit is probably something like this:

The loss of the capacitor will just muck up the crossover in the midrange. Most people I know would never notice.

You should be measuring some resistances and looking for broken connections. A £5 multi-meter or a 1.5V pencell battery can tell you a lot.

Best regards from Steve in Portsmouth, UK.

 

[rayma]

Yes, if the speakers are dead, maybe there are internal fuses that are also out.
The 32uF is not likely to be a series capacitor, so there still should be sound.

 

[AshB123]

Are Cricklewood Electronics still there? Top of Shoot-Up Hill on the Edgware Road in London? Very interesting shop. Often would I rummage in their bargain bins. 🙂

I have CONCERNS about your attempted fix here. Thing is you say the speakers don't work. What? Not at all, or badly?

A blown (open) 33uF capacitor on the bass shunt would still have them working after a fashion.

The circuit is probably something like this:

View attachment 1042963

The loss of the capacitor will just muck up the crossover in the midrange. Most people I know would never notice.

View attachment 1042964

You should be measuring some resistances and looking for broken connections. A £5 multi-meter or a 1.5V pencell battery can tell you a lot.

Best regards from Steve in Portsmouth, UK.

Yes, if the speakers are dead, maybe there are internal fuses that are also out.
The 32uF is not likely to be a series capacitor, so there still should be sound.

Thanks for the information guys. I’ve only had a quick look at the circuitry of the speakers to be honest. So that the capacitors that have been mentioned had blown.

I’ll have a more in depth look later on and I’ll provide a little circuit diagram of what’s actually in the speakers themselves. Being an electrician, I have some knowledge of how circuits work. 😂

Thanks again.

 

[rayma]

It is quite possible that all the drivers are blown, judging by the condition of the capacitors.
Test each woofer with a 1.5V battery directly across its terminals. It should click and move.

 

[kodabmx]

I see 8 different bi-polar caps that are 33uF and 50V or 63V in stock at Digi-key right now...
https://www.digikey.ca/en/products/...YZGpupGsIJzcltZ2js5uHlIgALQI0MpQAi4aQSEsEq1AA