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Simplistic Mosfet HV Shunt Regs
Simplistic Mosfet HV Shunt Regs
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Old 2nd January 2012, 03:56 PM   #2431
merlin el mago is offline merlin el mago
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R4 240K
Vin 274V
Vout 119V max
V across R1 0.527-0.530 still few current 12mA
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Old 2nd January 2012, 03:57 PM   #2432
iko is offline iko  Canada
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Simplistic Mosfet HV Shunt Regs
What's the voltage across R4? Do you have a resistor load attached? If so, what value?

While you're at it, check the voltage across R9 and R5. Q2 might be out to pasture.
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Old 2nd January 2012, 04:41 PM   #2433
merlin el mago is offline merlin el mago
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voltage across R4 284V
Puresound MM if you want I can remove & connect a dummy load of 15K
voltage across R9 0V
voltage across R5 0V
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Old 2nd January 2012, 04:43 PM   #2434
Salas is offline Salas  Greece
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Simplistic Mosfet HV Shunt Regs
Quote:
Originally Posted by rclourenco View Post
Hi!
Is their any negative rail version of the SSHV2?
Thanks and regards,
No. You should float two positives from double secondaries and bridges.
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Old 2nd January 2012, 04:45 PM   #2435
Salas is offline Salas  Greece
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Simplistic Mosfet HV Shunt Regs
Quote:
Originally Posted by merlin el mago View Post
Voltage across R1 47R between 0.594V and 0.596 = 12mA 119Vout max.
Did you try with the old Tx yet?
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Old 2nd January 2012, 04:49 PM   #2436
merlin el mago is offline merlin el mago
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Quote:
Originally Posted by Salas View Post
Did you try with the old Tx yet?
No, do you want that I try? now R4 240K I left or I come back to 120K?
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Old 2nd January 2012, 04:53 PM   #2437
Salas is offline Salas  Greece
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Simplistic Mosfet HV Shunt Regs
Yes. 12mA is too low for 3 leds and 56R. Something smells funny. You had shown 260V on 15k dummy with the old Tx.
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Old 2nd January 2012, 04:54 PM   #2438
rclourenco is offline rclourenco  Portugal
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Quote:
Originally Posted by Salas View Post
No. You should float two positives from double secondaries and bridges.
Many thanks for your kindness.
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Old 2nd January 2012, 04:57 PM   #2439
merlin el mago is offline merlin el mago
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Quote:
Originally Posted by Salas View Post
Yes. 12mA is too low for 3 leds and 56R. Something smells funny. You had shown 260V on 15k dummy with the old Tx.
I left 240K for R4 or I change for 120K?
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Old 2nd January 2012, 04:58 PM   #2440
Salas is offline Salas  Greece
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Simplistic Mosfet HV Shunt Regs
Indifferent, you will have range with 240k anyway. Just take it easy on the trimmer.
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