The simplistic Salas low voltage shunt regulator - Page 562 - diyAudio
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Old 11th December 2012, 05:40 PM   #5611
Salas is offline Salas  Greece
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9130 as output and 9610 as CCS, they will do OK.
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Old 11th December 2012, 06:16 PM   #5612
Mikola is offline Mikola  Russian Federation
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Thanks a lot
Oops, I was wrong, I've got 9640's, not 9610. They seem to be equal to IRFP9240.

Last edited by Mikola; 11th December 2012 at 06:20 PM.
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Old 11th December 2012, 06:51 PM   #5613
Salas is offline Salas  Greece
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They can worsen or upset some circuits here with their higher Ciss if not tested as non oscillating substitutions. Proceed but check stability. They will be slower as CCS than 9610 that is for sure. Treble might be better subjectively with 9610.
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Old 11th December 2012, 06:56 PM   #5614
Mikola is offline Mikola  Russian Federation
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Thanks, I'll give them a try.
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Old 13th December 2012, 10:03 PM   #5615
RollE2k is offline RollE2k  Sweden
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Salas: Is it possible to change the 2SK117GR's & BC550C for something else, and it would be possible to use this circuit up to 90v output? The other transistors seem to take the voltage as far as i can see. Or would there be any other trouble?

Last edited by RollE2k; 13th December 2012 at 10:08 PM.
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Old 14th December 2012, 12:00 AM   #5616
Salas is offline Salas  Greece
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There will be thermal trouble. If using slower bigger semis to sustain that, there will be performance loss. For that voltage region, check my SSHV circuits that can go lower than 100-150V with smaller ref resistors or an elevated voltage Reflektor I had shown enough pages back with FBET transistors.
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Old 14th December 2012, 05:55 AM   #5617
RollE2k is offline RollE2k  Sweden
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But i will only run approx 40mA + maybe 50mA shunt. That shouldn't give any thermal problems.. why i would like to run this regulator instead is because it takes less space, and i will run ECC88 at low voltage. ~34VAC w. voltage doubler.
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Old 14th December 2012, 01:36 PM   #5618
Salas is offline Salas  Greece
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The small internal semis would have thermal challenges with the voltage you have in mind, their bias does not change with the CCS setting.
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Old 14th December 2012, 01:46 PM   #5619
Salas is offline Salas  Greece
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Try this one. The Sanyo FBET technology BJT semis are cheap and available from Fairchild as KSC, KSA types.
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Old 17th December 2012, 08:39 AM   #5620
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hi,

a quick question regarding v1.0 5VDC, I got 115mv pik to pik oscillations, is that fine?
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