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My X-mas present BeoLab 5000 and BeoMaster 5000.

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Martynka
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Martynka posted on Wed, Dec 25 2019 4:30 PM

Hi,

I bought set of BeoLab 5000 and Beomaster 5000. All working and all in not bad condition.

Can you give me some advices to this ?? What I should check first, what I should replace ?? 

 

BeO is like a good wine - the older the better...

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Martynka
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Thanks,

and what with 2500 uF / 100V ?? 

BeO is like a good wine - the older the better...

Dillen
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Dillen replied on Sun, Mar 22 2020 5:54 PM

General handrule:

Don't go lower - and don't go much higher - in working voltage rating than the original.
If the original cap is 70V, see if you can find this or 80V.
A cap with a 100V rating may sound like a better choice, - but it isn't.
A capacitor is in some ways like a rechargeable battery, if it only ever sees a fraction of its nominated voltage it will die fast.

Don't go lower - and don't go much higher - in capacitance than the original.
If the original cap is a 3000uF, see if you can find a 3300uF.

Martin

Martynka
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I ordered  Mundorf MLytic MLGO AG 3300uF 63V and still searching 2500uF/100V.

BeO is like a good wine - the older the better...

chartz
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chartz replied on Sun, Mar 22 2020 10:57 PM

A 2200 uF will be fine!

Jacques

Dillen
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Dillen replied on Mon, Mar 23 2020 7:43 AM

Or 2700uF

Martin

Martynka
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I have in home my 2200uF/100V TDK/EPCOS with screw terminal (low ESR and high rated ripple current), I try first this. 

BeO is like a good wine - the older the better...

Dillen
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Dillen replied on Mon, Mar 23 2020 9:39 AM

I really wouldn't choose a low-ESR component for the filter capacitor.
The rush-in current will give the rectifier and the transformer a harder life.

Low-ESR capacitors can be used in the preamplifier section and, perhaps, if you cannot find something closer to the original, as the output series capacitors.

Martin

Martynka
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Martynka replied on Mon, Mar 23 2020 10:10 AM

It's my fault, I mean lower than similar capacitors, about 40 to max 80 mohm vs 60 to max 100 mohm and max 13A to 4,4 vs  5A  to 2,2A compared with Nichicon and other witch I found. I think TDK/EPCOS will be OK.

BeO is like a good wine - the older the better...

Martynka
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I still wait for a Mundorf caps but I changed 2500uF power capacitor.

and .... Is it possible that now Beolab play louder and stronger ?? 

it is like I increase preamplifier level but I didn't touch input regulators.

BeO is like a good wine - the older the better...

Martynka
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Today I piked up this little beauties 

 

little 3300uF compared to old one 3000uF: 

Because I didn't want overheat caps I prepared rounded connector to capacitor pin, after that I soldered wires to connector and on the end I put conector with wires on capacitor and soldered it.

 

and finally my new Beolab power capacitors family:

BeO is like a good wine - the older the better...

chartz
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chartz replied on Fri, Mar 27 2020 5:32 PM
Did you measure the old caps?

Iā€™d be surprised if they were bad.

For good measure I have replaced may of those Wicon electrolytics over the years, but they were incredibly durable and returned low ESR and acceptable precision.

Anyway, good job šŸ‘šŸ»

Any difference? Have the new caps reduced the switch-on thump?

Jacques

Martynka
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@chartz.. switch-on thump was little bit reduced when I put EPCOS/TDK 2200, but a very little bit. The same when I changing source. 

Yes, all old capacitors are over range:

2500uF -> 3800 uF

3000uF -> 4200 uF

3000uF -> 4100 uF

Difference... yes, Beolab play more powerfull and louder , a little something like you push "Loudness". When I stand next to the loudspeaker and choose vinyl to play next and the music play low, I feel like my trouser legs are rubbing against my legs. WOW. 

Everything I did before improved the bass, now I opened up the highs. But In the same time I changed caps in 5702 crossovers and I don't know witch caps opened up this.

And this Beovox 5702.... excellent and amazing and very underrated. After all changes inside I have the best treble what I heard ever and bass stronger than M70.

BeO is like a good wine - the older the better...

Dillen
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Dillen replied on Fri, Mar 27 2020 8:35 PM

Martynka:

@chartz.. switch-on thump was little bit reduced when I put EPCOS/TDK 2200, but a very little bit. The same when I changing source. 

Yes, all old capacitors are over range:

2500uF -> 3800 uF

3000uF -> 4200 uF

3000uF -> 4100 uF

Difference... yes, Beolab play more powerfull and louder , a little something like you push "Loudness". When I stand next to the loudspeaker and choose vinyl to play next and the music play low, I feel like my trouser legs are rubbing against my legs. WOW.

That's the result of the damping factor being restored.
The lower output impedance of the amplifier, the more control over the coils in the speakers.
Think of the coils being almost shorted by the amplifier, "grabbing, moving and braking" them. With worn out capacitors in series the "grab" won't be as tight and sound won't be as precise but instead it will feel more "elastic".

Martin

Martynka
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Martynka replied on Fri, Mar 27 2020 11:17 PM

One more question @Dillen, after replaced 2500uF/100V I hear more noise from turntable. Touching the Beogram or walking next to the Beogram is transmitted to the speakers with interference. I think that Beogram sounds better, more detailed but with more distorsion. 

BeO is like a good wine - the older the better...

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