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A quickie re Diode upgrade in Denon 3313  Bluray power supply
A quickie re Diode upgrade in Denon 3313  Bluray power supply
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Old 24th April 2018, 03:16 PM   #1
raffajaffa is offline raffajaffa  United Kingdom
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Default A quickie re Diode upgrade in Denon 3313 Bluray power supply

Can anyone advise a better set of diodes for the bridge in power supply currently using 4 x RL207 DO15.1000v 2a.
Historically I have found Schottkys sounded nicer than standard carbon.
Searching I have only found GB02SLT12-220 or some Cree type similair but in the worng package. possibly 600v instead of 1000 with a 1200v available somewhere?. .I am prepared to us these with a bit of ingenuity and added leads.
note All but 2 of the caps have been replaced by silmics2 to great effect.
thanks Dave
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Old 24th April 2018, 03:46 PM   #2
PH104 is offline PH104  United States
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A quickie re Diode upgrade in Denon 3313  Bluray power supply
Not sure why they're 1000 PIV but you might have to search for lower voltage part to get the package you want. Any reason why this wouldn't work:
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File Type: pdf sb2h90-59579.pdf (75.5 KB, 10 views)
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Old 24th April 2018, 05:54 PM   #3
raffajaffa is offline raffajaffa  United Kingdom
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Hi and thanks for response. Must admit I also looked into reasons and formulaes re PIV and became more confused as I found a circuit manual for this. Quote x 2.888 factor high voltage Highest output voltage in circuit is 12vdc.Highest caps are 2 x 50 22uf and 1 x 450v 100uf. My previous Denon also had a 450V cap smoothing it?. So I assume the 1000 value is to be retained. They are not snubberized in the circuit .https://1drv.ms/b/s!AqqNLWgieBXcgYED_a5DpMbK21VTZQ
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Old 24th April 2018, 07:41 PM   #4
PH104 is offline PH104  United States
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A quickie re Diode upgrade in Denon 3313  Bluray power supply
Can't read that very well. If you're replacing the 4 diodes in the upper left corner then 1000 PIV could be appropriate. I went through a similar hunt for 1kV Schottky's without much success in finding a thru-hole part. Mark Johnson's snubber article in Linear Audio has a table of preferred diodes. It's worth the buck or so to get.
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Old 24th April 2018, 09:23 PM   #5
raffajaffa is offline raffajaffa  United Kingdom
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Yep I thought it was just me who had a problem reading it.LoL.
I have since found an alternatice Cree 1200v at very reasonabele price (if that is relevant)
in a TO 220 package on ebay. DIODE, SCHOTTKY, 1200V, 2A, SIC,TO-220-2 Part # CREE C4D02120A | eBay
which is more than reasonable comparing performance specs alone. However when I initially gave up on improvements a few yewars ago ? I had vague recollections of someone claiming it had a distinct sonic signature?. Hmmm Will now start a search on that subject. It is still a small price to pay for potential progress.
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