Details on the TWRPS-UGL – THE WELL Audio

This topic has 8 replies, 2 voices, and was last updated 1 year, 9 months ago by multiblitz.

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- 22/08/2022 at 15:50 #1752
  multiblitz
  Participant
  I would like to mod it with a different raw supply…could you share the schematic please ?
  
  Thx so much…
- 22/08/2022 at 16:02 #1754
  The Well Audio
  Participant
  It’s enough simple, remove rectifiers and filter (R11, R12, R13, R14, R15, C8, C9, C10, C11, C14, C15, D6, D7, D8, D9).
  Then you can connect the different raw supply to the pads of C14 or C15 (upper pad is the positive one).
- 24/08/2022 at 15:43 #1756
  multiblitz
  Participant
  Thx. I did that…tried to measure the voltage before connecting it to the Drixo, slipped with the probe, got a little spark…and now we have always 26.5V…so no regulation basically…any advise on which parts to exchange (with part numbers ?)?
- 24/08/2022 at 17:55 #1758
  The Well Audio
  Participant
  Difficult to say what part is broken.
  
  You can try replacing in the following order:
  Q3 – BCP53-16T1G
  U1 – OPA140AIDR
  Q1 – FQT7N10LTF
- 01/09/2022 at 17:50 #1777
  multiblitz
  Participant
  The OPA140AIDR is not available (except chinese offers on ebay, which I dont trust)…what is an alternative ?
  
  All the best
- 02/09/2022 at 00:01 #1785
  The Well Audio
  Participant
  The LT1677 is a pin to pin replacement although it’s more expensive.
- 03/09/2022 at 23:44 #1786
  multiblitz
  Participant
  …and as well not available…sorry to bother you again…
- 03/09/2022 at 23:54 #1788
  The Well Audio
  Participant
  You can use the ADA4522-1, Mouser part 584-ADA4522-1ARZ-R7.
- 04/10/2022 at 11:53 #1816
  multiblitz
  Participant
  Just of other people have the same issue: It got fixed by exchanging the cheap parts, the Q1 and Q3, no need to exchange the OP-amp…2 min job…all is good now again…
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