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CitizenKane
diyAudio Member

Join Date: Jun 2017
Location: near Stuttgart
Quote:
 Originally Posted by craydive silicon diodes for full wave rectification say 0.6V x 2, so the voltage drops by 1.2V. so now 55.4VDC-ish. Thanks Pieter, I should have thought more about it.
Don't forget B of the transformer. Mine have a given and measured B of 1.08 so I have to start calculating from 40V * 1.08 = 43.20 V.
Results f.e.g. in 43.2V * 1.414 = 61.08V - 1.2 V = 59.88 V (without load).

(Also my diodes differ from fact-sheet: given 0.72 V so I should have 1.435 V. But measured 1.54 V.)

Simulated load of the whole PSU with power-resistors results in a voltage drop of 5.7V.

So I would get 59.88 V - 5.7 V = 54.18 V if the mains-voltage of 230 V would not vary from 207 V to 253 V (ą 10%).

So theoretical I can get the min. value or the max. value:
min.: 48.76 V (-10%) / max.: 59.6 V (+10%).

 30th May 2018, 03:13 PM #312 smouse   diyAudio Member   Join Date: Jul 2011 Location: Russia Hey. Can I enroll in 2 boards and sets of parts? Last edited by smouse; 30th May 2018 at 03:23 PM.
 30th May 2018, 08:53 PM #313 outtek diyAudio Member   Join Date: Jan 2017 Hi Shaan, when will the group buy start? Thanks.
 1st June 2018, 04:33 AM #314 shaan   diyAudio Member     Join Date: Mar 2009 Location: Kolkata @smouse Yes you can. @outtek In a couple weeks - mid June. __________________ V4 GB! | V4H GB!!(ONLINE) | PSU GB!!!
 1st June 2018, 07:00 AM #315 outtek diyAudio Member   Join Date: Jan 2017 Hi, Shaan, just ship my PSU board in that case, I will have something to do during this time ). Thanks.
 1st June 2018, 07:49 AM #316 shaan   diyAudio Member     Join Date: Mar 2009 Location: Kolkata Ok I will do that. __________________ V4 GB! | V4H GB!!(ONLINE) | PSU GB!!!
 5th June 2018, 12:13 PM #317 fencki   diyAudio Member     Join Date: Mar 2010 Location: Vienna are there some pics of finished amps here?
HH
diyAudio Member

Join Date: Nov 2002
Quote:
 Originally Posted by fencki are there some pics of finished amps here?
And maybe some listening impressions too..

supernet
diyAudio Member

Join Date: Dec 2001
Location: Europe
Quote:
 Originally Posted by fencki are there some pics of finished amps here?
Getting close
Attached Images
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fencki
diyAudio Member

Join Date: Mar 2010
Location: Vienna
Quote:
 Originally Posted by supernet Getting close

looks good.
canīt wait to see finished amps and read about the listening impressions...

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