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Simplistic Mosfet HV Shunt Regs
Simplistic Mosfet HV Shunt Regs
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Old 22nd September 2018, 11:10 PM   #5911
merlin el mago is offline merlin el mago
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What's the max difference Vin vs Vout SSHV2 can handle?
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Old 23rd September 2018, 03:37 AM   #5912
Salas is offline Salas  Greece
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Simplistic Mosfet HV Shunt Regs
As much max VDS and max dissipation the D-MOS on your sink can
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Old 23rd September 2018, 10:59 AM   #5913
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OK I will keep the 20V of difference.
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Old 23rd September 2018, 06:34 PM   #5914
merlin el mago is offline merlin el mago
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Q5, Q6 & D3 gone.
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Old 26th September 2018, 02:31 PM   #5915
merlin el mago is offline merlin el mago
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Issue fixed, thanks Salas.
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Old 26th September 2018, 08:38 PM   #5916
Salas is offline Salas  Greece
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Simplistic Mosfet HV Shunt Regs
You also solved the AC readings issue after repairing the damage by the accidental short?
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Old 26th September 2018, 09:11 PM   #5917
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Yes Salas.
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Old 23rd October 2018, 07:07 PM   #5918
widi is offline widi  Spain
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Default sshv 2

Hello, Mr. Salas,
Some time ago I built my stage phono which I am very happy, but I have a buzz (photo of the oscilloscope at the end of the phono stage) around 75hz I use the sshv2, which works well for me or that, I adjust both tension and the current, the operating voltage is dl phono stage is 255 volts and the current is adjusted to 35ma. Attached photos of the phomo stage and psu.
Could it be a malfunction of sshv2 that produces such noise?
Attached Images
File Type: jpg 20180327_201854.jpg (129.8 KB, 91 views)
File Type: jpg 20180615_122359.jpg (120.2 KB, 91 views)
File Type: jpg 20181021_135904.jpg (71.1 KB, 89 views)
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Old 23rd October 2018, 07:32 PM   #5919
Salas is offline Salas  Greece
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Simplistic Mosfet HV Shunt Regs
Hello

Was it there before or it recently appeared? Can you also find it when probing the rail? Use AC scope coupling, 1:10 probe setting and short wire ground probe tip accessory for that. It can be intereference or ground loop. Although 75Hz is a weird frequency to be hum loop.
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Old 23rd October 2018, 07:57 PM   #5920
widi is offline widi  Spain
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Default sshv 2

Quote:
Originally Posted by Salas View Post
Hello

Was it there before or it recently appeared? Can you also find it when probing the rail? Use AC scope coupling, 1:10 probe setting and short wire ground probe tip accessory for that. It can be intereference or ground loop. Although 75Hz is a weird frequency to be hum loop.
Thanks for answering, the noise was already in the first moment that I started the phono stage.
When reviewing the ssvh 2 output with the oscilloscope I can not see anything alarmingly, attached screenshots
Attached Images
File Type: jpg configuration CA.jpg (71.4 KB, 76 views)
File Type: jpg configuration CA II.jpg (70.1 KB, 72 views)
File Type: jpg 20181023_204325.jpg (86.3 KB, 24 views)
File Type: jpg 20181023_204624.jpg (67.7 KB, 23 views)
File Type: jpg 20181023_204647.jpg (63.7 KB, 18 views)
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