Stasis Voltage section

BrianEno · 29th June 2009, 10:20 AM

Have malfunctioning SA/1
For the Outputcurrentsection I use The MJ15023 and MJ15025.
Is there any need to use an type for the 4 transistors that make up the Voltage section in a SA\1 of the Stasis tandem? saw somewhere a reference to MJ15003/04.
Or can I just put in the same but of the opposite type? (NPN on a PNP row of currentdumping transistors and vice versa)
Problems with biasdrift could be one of the A42/92 TO92s or the MPSU10/60 drivers my technician though suspects the Stasis Voltage section.

Nelson Pass · 29th June 2009, 02:56 PM

I can't imagine how you would sub an opposite polarity in, so I don't
think I would recommend that.

The 15003/4 will work but they are pretty slow compared to the
15023/5 types.

BrianEno · 29th June 2009, 03:17 PM

What I ment, but probably not stated correctly, is that for the Stasis Voltage section I could use the same type of TO3 MJ15023/25 series but a NPN doping (or what ever one should call that) in front of a PNP row of currentdumping outputtransistors and vice versa.
I reckon there are 4 Stasis voltage transistors in a SA/1 and 36 Current dumping transistors and you can use the same type of device for them?
Is there a need to Beta match the Stasis voltage section of transistors like in the Stasis 1,2 and 3 Series?

29th June 2009, 10:20 AM	#1
BrianEno diyAudio Member Join Date: Jul 2007	Stasis Voltage section Have malfunctioning SA/1 For the Outputcurrentsection I use The MJ15023 and MJ15025. Is there any need to use an type for the 4 transistors that make up the Voltage section in a SA\1 of the Stasis tandem? saw somewhere a reference to MJ15003/04. Or can I just put in the same but of the opposite type? (NPN on a PNP row of currentdumping transistors and vice versa) Problems with biasdrift could be one of the A42/92 TO92s or the MPSU10/60 drivers my technician though suspects the Stasis Voltage section.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
400A or Stasis 3?	Mywing	Pass Labs	6	4th November 2007 06:53 PM
Stasis 1 pics	Nelson Pass	Pass Labs	16	7th April 2007 08:18 PM
STASIS 2 problem	WolfgangL	Pass Labs	27	27th September 2005 03:28 AM
Stasis Amp	lumanauw	Pass Labs	9	24th April 2005 08:44 AM
stasis 2 and 3 schematics	Nelson Pass	Pass Labs	39	3rd February 2004 05:53 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

29th June 2009, 02:56 PM	#2
Nelson Pass The one and only Join Date: Mar 2001	I can't imagine how you would sub an opposite polarity in, so I don't think I would recommend that. The 15003/4 will work but they are pretty slow compared to the 15023/5 types.

29th June 2009, 03:17 PM	#3
BrianEno diyAudio Member Join Date: Jul 2007	What I ment, but probably not stated correctly, is that for the Stasis Voltage section I could use the same type of TO3 MJ15023/25 series but a NPN doping (or what ever one should call that) in front of a PNP row of currentdumping outputtransistors and vice versa. I reckon there are 4 Stasis voltage transistors in a SA/1 and 36 Current dumping transistors and you can use the same type of device for them? Is there a need to Beta match the Stasis voltage section of transistors like in the Stasis 1,2 and 3 Series?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)