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Mains Hum - Even the great get it wrong.
Mains Hum - Even the great get it wrong.
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Old 28th May 2018, 01:40 PM   #1
KatieandDad is offline KatieandDad  United Kingdom
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Default Mains Hum - Even the great get it wrong.

Unfortunately my mighty Pass Aleph 4 has failed and I don't have the money to replace the 12 x 33000uF / 63V caps at the moment.

My Pass Pearl 2 was black quiet with the Aleph, going through a Pass B1.

While I am waiting for the funds to repair the Aleph 4 I am having to use my Arcam AVR280 (Shame on me I know).

One thing I notice immediately though is the Arcam is not as quiet as the Pass amps. It hums, albeit only quietly, on the silent passages of an LP.

The Pearl 2 uses 2 x 33000uF / 63V Audio caps sourced from Maplin some 20 years ago, they are fine.

I won't be buying Dubillier caps again, they failed after just over 4 years.
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Old 28th May 2018, 01:58 PM   #2
jaycee is offline jaycee  United Kingdom
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Hm surprising as I always thought Dubilier were high quality.
Sadly Panasonic discontinued their TSHA/TSUP series!

I wonder how good Kemet are...
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Old 28th May 2018, 02:12 PM   #3
KatieandDad is offline KatieandDad  United Kingdom
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I've asked that question a few times as RS are supplying them now.
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Old 28th May 2018, 02:15 PM   #4
scottjoplin is offline scottjoplin  Wales
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Quote:
Originally Posted by jaycee View Post
I always thought Dubilier were high quality.
They are
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