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Old 30th March 2003, 09:54 PM   #1
Piersma is offline Piersma  Netherlands
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Default High speed soft recovery diodes

Hi all,

I have replaced the ordinairy diodebridge in my Denon DCD-1520 for high speed soft recovery diodes. I have used BYV-95A diodes.

After some extensive listenings i cannot detect any sonic improvements. Have i done something wrong ?

Please your comments.

Regards,
Piersma
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Old 30th March 2003, 10:20 PM   #2
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Default DIODES.

Hi,

Quote:
After some extensive listenings i cannot detect any sonic improvements.
No.

Not necessarily, it could be that your psu had good rejection already.

Cheers,
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Old 30th March 2003, 11:27 PM   #3
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Default DCD-1520

Hi Piersma,

I've got a DCD-1520 as well and that's one of the modifications I was thinkign of doing. How do you like the player (compared to anything more recent?) and what other mods have you done? I wish I could help with your diode question, but I'm not so experienced. Thanks.
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Old 31st March 2003, 02:08 AM   #4
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Maybe you were not *expecting* enough improvement. Seriously though, exactly what sort of diodes where in it before? Similar to what fdegrove suggests, maybe the rest of the audio cct was properly engineered so it wasn't very sensitive to this problem.
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Old 31st March 2003, 09:32 AM   #5
Piersma is offline Piersma  Netherlands
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Default Fast diodes

Hi Guyz,

The diodes which were in......... ~@x%?94## made in Hongkong.

Without any mods the player sounds really terrible compared to the cheapest dated Marantz player.

Here are the mods: removed the muting transistors, put in OPA2134, put in styroflex and MKP caps, removed the ceramic caps on the output of the DAC,clock modification, buffered all integrated circuits, replaced the regulators and the diodebridge.

The ELMA output caps really su........ replace them by MKP, you will be happy

Regards,
Piersma
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Old 5th April 2003, 10:18 AM   #6
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Hi Piersma,
In my Sony CDP-33ES I noticed a much smaller improvement than in my Philips CD-650.
Maybe the Japanese players are using different type of transformers? Frankly I am clueless....
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Old 9th April 2003, 08:32 PM   #7
Coulomb is offline Coulomb  England
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Default Re: Diode Mod.

Quote:
Originally posted by Elso Kwak
Hi Piersma,
In my Sony CDP-33ES I noticed a much smaller improvement than in my Philips CD-650.
Maybe the Japanese players are using different type of transformers? Frankly I am clueless....
I doubt the Person who designed the Kwak Clock is clueless!!

Anthony
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