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Old 13th November 2013, 10:44 AM   #1761
neofeed is offline neofeed  France
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Hi !
Is there anyone here who could give me the references for the caps on C36 and C37 for an UCD400ST ?

They've been removed from amps I bought second hand and need to solder them back... but the seller didn't kept the orginal caps.

Cheers !
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Old 13th November 2013, 01:39 PM   #1762
zman01 is offline zman01  Bangladesh
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neofeed,

Have you written to Hypex?
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Old 13th November 2013, 01:39 PM   #1763
neofeed is offline neofeed  France
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Just did actually
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Old 11th October 2014, 05:18 PM   #1764
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Hi fellows,
I had narrowed my search down to UCD400 because I've blown my tripath amp and want to reuse the casing/parts.

Quote:
Originally Posted by Malefoda View Post
...

yes this is DIY, destroy it yourself. Done. (with fireworks).

...

I have the case, +/-58V, (useless 10V and 5V), a passive pre (10K because the Truepath was 50K Zin) and let's say 2/300€.
As for power my old 8ohms JBL -wich I play loud- were at pain with my 30W amp, just nice with the Tripath (let's state 120W with low THD).
...

well low Zin of the Class D Audio amps and Anaview's ones lead me to UCD400HG HxR and its matching voltage req. But do you guys think having a single linear supply powering 2 modules (27.000uF each rail) will lower sq?

Matthieu
I can add a second row 2x2 +/- caps before each UCD, worth? BTW, now I wonder if having the modules near (tight space there) will cause crosstalk...
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Old 24th October 2014, 05:51 PM   #1765
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Well, case in progress... BTW, still questions, I've sent them to Hypex support, don't know if they answer such questions... and image search, website search I've done for hours never gave the the answers.
So I do let them here, on my UCD400HD HxR:

* are the 2 films caps just after the input connector coupling caps for DC blocking? As I'm serious about my sources and there is no DC there, can I and should I (soundwise) bypass them?

* are the blue 22uF supply caps for the LM4562? As the HR are quite close, do you think it is already top or a better cap will better these? (no snake oil there, I have spares Rubycon ZLG caps, if it's just pointless I don't mess with your design).

Thanks for any input!
Matthieu



... still strange, g**gle image returns no example of bypassed input caps so nobody can guess wich they are...
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Old 27th October 2014, 06:41 PM   #1766
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I did get an answer.
yes they are the couling caps, they will be shorted,
yes they are for LM4562 supplies, right now they will stay, I'll look for an example of clear improvment by someone prior to mess there.
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Old 28th October 2014, 08:08 PM   #1767
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It's done, had to do with the remains of the TA3020.
What may I mesure/check prior to power it up? LS- is the common ground?
The supply wires are hanging until I am not 110% assured it will work flawlessly...
Attached Images
File Type: jpg UCD400.jpg (251.1 KB, 203 views)
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Old 30th October 2014, 10:11 PM   #1768
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Talking to myslef (any reader at least?)
Success!
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File Type: jpg Test4406UCD.jpg (229.9 KB, 177 views)
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Old 31st October 2014, 08:08 PM   #1769
avr300 is offline avr300  Denmark
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Reading!
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Old 31st October 2014, 08:21 PM   #1770
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...any reader at least?..
Cool, you have the same Sansui Tuner like me !
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