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Simplistic Mosfet HV Shunt Regs
Simplistic Mosfet HV Shunt Regs
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Old 28th December 2011, 02:07 PM   #2241
merlin el mago is offline merlin el mago
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LED's also burned
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Old 28th December 2011, 02:14 PM   #2242
Salas is online now Salas  Greece
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Simplistic Mosfet HV Shunt Regs
Debug, make P2P, whatever.
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Old 28th December 2011, 02:21 PM   #2243
merlin el mago is offline merlin el mago
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I changed the IRF9610, the 220R gate resistors and all LED's but now LED's don't lid

The pcb isn't mine....
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Old 28th December 2011, 05:18 PM   #2244
vgeorge is offline vgeorge  Greece
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Simplistic Mosfet HV Shunt Regs
Today I did some testing on the SSHV2.
Nothing I can see on my 20Mhz scope.
It is not with a dummy load, but feeding a ll1660 transformer.
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Old 28th December 2011, 07:38 PM   #2245
dodo is offline dodo  Poland
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what kind of CLC or CRC combination you have before regulator entry?
what was the distance between regulator and load?
if the distance is more then 10 cm will you get the same results applying 4-10uF MKP cap just near the load ?
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Old 28th December 2011, 07:53 PM   #2246
vgeorge is offline vgeorge  Greece
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Simplistic Mosfet HV Shunt Regs
CLC on the ps box and RC close to the reg. Load max 15cm from the reg.
You shouldn 't have a cap after the regulator. Don' t forget that SSHV2 has remote sensing.
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Old 29th December 2011, 07:55 AM   #2247
regal is offline regal  United States
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Impressive scope shots, I'm upgrading the OPT's on my SSHV1 headamp to parafeed and might has well upgrade to SSHV2 at the same time, where are folks finding the Jfet (USA) ?
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Old 29th December 2011, 02:28 PM   #2248
merlin el mago is offline merlin el mago
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Quote:
Originally Posted by Salas View Post
Debug, make P2P, whatever.
Is dead the mosfet if is not voltage between G & S of IRF9610?
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Old 29th December 2011, 02:49 PM   #2249
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Simplistic Mosfet HV Shunt Regs
Yes. But if you don't give total account of what happens, where you connect, voltages, currents, what is on the build, pictures, nobody can give you a correct idea of how to debug that PCB.
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Old 29th December 2011, 03:48 PM   #2250
merlin el mago is offline merlin el mago
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Yes you have reason, at this point I don't trust in quanghao SSHV pcbs due to the fact is the second that have issues, I will make a new P2P, BTW do you know when will be released the GB for your SSHV2?

Last edited by merlin el mago; 29th December 2011 at 03:55 PM.
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