Carver M 1.0t Capacitors

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Carver M 1.0t Capacitors

Post by NJ_Antonio » Mon Feb 23, 2009 10:34 am

Hi! My Carver M 1.0t has developed no sound but a hum on the output. I checked the power supply capacitors and I notoced that the output of the 30 V negative side is not flat but shows a ripple that is reproduced at the output. I am planning to replace the two Rubycon 3300 uF 35 V capacitors. Any good suggestion on brand and type? Nichicon?

I also tested the 110 V 6800 uF caps on the 100 V circuit. These capacitors have three connecting pins. One is to ground, the second is on the 100 V path and the third one does not seem to be connected to anything. Hovered one of the two caps shows the same tension (~ +40 V) both on the second and third pin. The negative side cap does not show tension on the third pin and is slightly higher (~-45 V). Is this normal? In both cases the output is flat. Should I replace these caps? If so with what? It seems hard to find caps with acceptable rating.

Thank you in advance for any advice to restore this great amp!

1. Infinity Gamma w/servo, Audio Research D-250 Mk II + 2 bridged Hafler XL600, Audio Research SP6B, Denon DCD-1560, Denon turntable
2. Electrovoice Interface D, Kenwood M2A, C2, CD (in Italy)
3. Allison One, Dynaco 400, APT Holman pre, Technics CD, Luxman turntable (in Italy)
4. ADS L-1290/II, Carver M 1.0t, C-1, Pioneer CD
5. Phase Linear Andromeda III , 200 II & 300 II, C4000 II, Sony X-307 ES CD
6. JBL L-36 Decade, Fisher X-500B tube receiver, Yamaha 720 CD
7. Etc. Etc. Etc.

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Re: Carver M 1.0t Capacitors

Post by BillD » Mon Feb 23, 2009 11:32 am

Those 3 (or 4) pin caps are just for stability (snap-in) and to minimize installation polarity errors. The third pin isn't connected to anything in the circuit.
It should sound like it isn't there!
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Post by treitz3 » Mon Feb 23, 2009 11:39 am

In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence.

The best way to enjoy digital music reproduction is to never listen to a good analogue reproduction.

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