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8th March 2013, 04:26 AM  #611 
diyAudio Chief Moderator

Its there where Sonny biases TSSA 1.6 too.

8th March 2013, 04:48 AM  #612 
diyAudio Member
Join Date: Oct 2009
Location: Brisbane, Australia

Owen said it did improve slightly at 1A, but at that point it was pure class A and only really capable of pulling 30WPC out of an amp and power supply capable of pretty much matching that performance at nearly 200W... not really a worthwhile tradeoff. at 600mA 1khz 2nd harmonic distortion product is 110dB into 8Ω... H3 is ~ 118dB
Last edited by qusp; 8th March 2013 at 04:52 AM. 
8th March 2013, 05:35 AM  #613 
diyAudio Member
Join Date: Apr 2002

Hi LazyCat,
would like 4 boards. Kindest regards, M 
8th March 2013, 06:51 AM  #614 
diyAudio Member
Join Date: Nov 2002
Location: Hungary

What is the default bias level of the "original" VSSA?
How many mA? And still the old question: how can I adjust it??? 
8th March 2013, 07:33 AM  #615  
diyAudio Member
Join Date: Sep 2007

Quote:
Procedure is simple, first solder 1 k multiturn trimmer potentiometer to R17 pads by the help of 2 cm wire for each trimmer's pin, start with zero ohm setting, trimm bias current to 160 mA, wait for the heatsink to warm up, readjust the trimmer to 160 mA, unsolder the trimmer, measure resistance of the trimmer with digital ohmmeter, use appropriate R17 SMD resistor size 1206 (3216) of the same value as measured, solder the resistor to VSSA PCB. Last edited by Lazy Cat; 8th March 2013 at 07:56 AM. 

8th March 2013, 07:46 AM  #616 
diyAudio Member
Join Date: Sep 2007

VSSA PCB requests
So far 126 VSSA PCB requests received. I'll post the ones from open forum (116 pcs), PM requests (10 pcs) will stay discrete. Next week I will send the info to each of you regarding sets (PCB + semiconductors).
Regards, Andrej Joachim Gerhard 2 PCB set AKN 2 PCB set Idefixes 4 PCB set kimon 2 PCB set brianco 2 PCB set Dane 2 PCB set MKHunt 2 PCB set Cambe 2 PCB set Supernet 2 PCB set boyet0173 2 PCB set tom42107 2 PCB set presbel 2 PCB set meltman 2 PCB set gannaji 2 PCB set dodo 2 PCB set coolet 2 PCB set jj506 2 PCB set vgeorge 2 PCB set touchdown 2 PCB set wponline 2 PCB set Luke 2 PCB set cvtaudio 10 PCB set Renio 2 PCB set maillard 2 PCB set PauloPT 2 PCB set hcbonfim 2 PCB set gusto142 2 PCB set PinkPink 2 PCB set dine1967 2 PCB set bressix 2 PCB set nico2k3 2 PCB set routhun 2 PCB set CaféNoir 2 PCB set ColinAlex 8 PCB set Murdoc 2 PCB set regal 2 PCB set AUSTINP 2 PCB set kroyin 2 PCB set fredlock 2 PCB set mikvous 2 PCB set myfi 2 PCB set FelixG 4 PCB set ichiban 2 PCB set padamiecki 2 PCB set gogu 2 PCB set joshvi 2 PCB set philippeleite 2 PCB set mefistofelez 4 PCB set Thanks a lot guys. Last edited by Lazy Cat; 8th March 2013 at 08:14 AM. 
8th March 2013, 08:13 AM  #617 
diyAudio Member
Join Date: Jan 2004
Location: MD

Thanks for including the semi's they seem difficult to obtain.

8th March 2013, 08:22 AM  #618 
diyAudio Member
Join Date: Apr 2012

Hi LC,
count me in for 6 PCB set 
8th March 2013, 09:00 AM  #619 
diyAudio Member
Join Date: Jul 2007

Count me in for a stereo pair.
Best regards. 
8th March 2013, 09:24 AM  #620 
diyAudio Member
Join Date: Oct 2010
Location: Burlington, NC

Regards, Andrej
Joachim Gerhard 2 PCB set AKN 2 PCB set Idefixes 4 PCB set kimon 2 PCB set brianco 2 PCB set Dane 2 PCB set MKHunt 2 PCB set Cambe 2 PCB set Supernet 2 PCB set boyet0173 2 PCB set tom42107 2 PCB set presbel 2 PCB set meltman 2 PCB set gannaji 2 PCB set dodo 2 PCB set coolet 2 PCB set jj506 2 PCB set vgeorge 2 PCB set touchdown 2 PCB set wponline 2 PCB set Luke 2 PCB set cvtaudio 10 PCB set Renio 2 PCB set maillard 2 PCB set PauloPT 2 PCB set hcbonfim 2 PCB set gusto142 2 PCB set PinkPink 2 PCB set dine1967 2 PCB set bressix 2 PCB set nico2k3 2 PCB set routhun 2 PCB set CaféNoir 2 PCB set ColinAlex 8 PCB set Murdoc 2 PCB set regal 2 PCB set AUSTINP 2 PCB set kroyin 2 PCB set fredlock 2 PCB set mikvous 2 PCB set myfi 2 PCB set FelixG 4 PCB set ichiban 2 PCB set padamiecki 2 PCB set gogu 2 PCB set joshvi 2 PCB set philippeleite 2 PCB set mefistofelez 4 PCB set buzzforb 2 PCB set
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