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Old 29th June 2009, 10:20 AM   #1
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Join Date: Jul 2007
Default 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.
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Old 29th June 2009, 02:56 PM   #2
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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.

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Old 29th June 2009, 03:17 PM   #3
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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?
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