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One of the internet recommended mods for this transport is to replace the two existing DF02M bridge rectifiers with axial diodes.
I'm eyeing a couple choices at Partsconnexion:
Vishay Telefunken Diode 1A 1000V SF4007
Vishay Diode 3A 1500V BY228TR
Or from Hi-Fi Collective:
MUR1100E 1A 1000V Ultrafast Diode
To be honest I thought I would be looking at some sort of $$$ audiophile type bridge rectifiers or using radial diodes, but there's really not a lot of room in on the PCB, and the only mod I have come across uses the axial type. Albeit the actual axial diode is never named, so that's why I'm reaching out for any input here? (I've never replaced rectifiers or diodes as an upgrade.)
Cheers!
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
Follow Ups:
are the "best" sounding diodes for audio, based purely on their characteristics. Also, I agree with someone else who mentioned that you don't need HV diodes in this application. Low voltage Schottky diodes are available in axial lead form, from Mouser or Digikey, and they are cheap. If you can fit discrete parts, that is what I would use.
Hexfreds and "fast recovery" diodes are good, but Schottkys are better in my direct experience.
Changed diodes to Schottky for the only mod on a phono pre and it was a clearly noticeable improvement when the needle dropped. Do it Jonesy.
Thanks for the suggestion. I may order some different types but start with Schottky. If they sound good I'll leave them in until I get ambitious again.
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
I think you will like the results, but bear in mind that this (upgrading the diodes) is usually not a Holy Cow type of upgrade, unless you are starting from something very mediocre. Still, it is very worth doing.
,
I wander the likelihood that equiptment like the Audiolab 6000 uses soft-recovery or Schottky diodes?
Denied facts are still facts.
why the high PIV? Is it a tube circuit? The 1 amp rating on 2 replacements is low by 0.5a. Also you only need a 400vdc PIV according to the DF02M bridge rectifier rating.
If you want better rectifiers use some hexfreds if you can
Is this one of those 'this is so much better' mods? I'd look at the caps also.
Yes, thanks, I'll be doing capacitors as well.The mods to this CD transport are available as DIY kit form, or you can send the unit in to get it done. It's a company in Europe.
They build a bridge rectifier with axial diodes to replace the existing DF02M's. (pic)
In my case I picked the axial diode (edit: values that meet/exceed DF02M) pretty much because those were the only ones available from the suppliers a I order from time to time.
But maybe I should look at something more elaborate as you suggest. Though as mentioned earlier, space is limited.
Cheers!
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
Edits: 07/13/21 07/13/21
Jonesy, I've got a 6000CDT as well and would like the name or link to the mods/supplier you are referring to. Thanks! John
Here's the link.
Cheers!
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
years ago I did the same thing on a player replacing the rectifiers with ultra fast ones. I can't really say there was any noticeable difference. The caps were all factory black gates.
I did however find a big difference in changing the opamp after the DA.
Cheers!
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