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Old 13th May 2013, 02:08 AM   #3941
Salas is online now Salas  Greece
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Quote:
Originally Posted by JBLman View Post
What part? To place the Zobel cap right or not to exceed the top Mosfet's spec? Both should be watched. Crt could had marked it better I am not sure, but here is an "X-RAY" of the C1 area.
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Old 13th May 2013, 04:51 PM   #3942
JBLman is offline JBLman  United States
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Ok thanks!
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Old 13th May 2013, 08:35 PM   #3943
mogliaa is offline mogliaa  United Kingdom
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Quote:
Originally Posted by Salas View Post
What part? To place the Zobel cap right or not to exceed the top Mosfet's spec? Both should be watched. Crt could had marked it better I am not sure, but here is an "X-RAY" of the C1 area.
I failed both! it wasn't clear to me the PCB marking, but not blaming anyone as it seems I was the only one who did this
Ale
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Old 13th May 2013, 11:56 PM   #3944
JBLman is offline JBLman  United States
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Yea, I don't know it only puts out 58vdc and can't adjust it.

Last edited by JBLman; 14th May 2013 at 12:00 AM.
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Old 14th May 2013, 12:27 AM   #3945
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Originally Posted by mogliaa View Post
I failed both! it wasn't clear to me the PCB marking, but not blaming anyone as it seems I was the only one who did this
Ale
I will ask Crt to mark it more intuitively for the future when I will catch up with him and he has some time. Interestingly nobody reported so for missing the C1 placing, but its mainly because they use longer capacitors is my guess. Thanks for the feedback, very nice website you got BTW.
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Old 14th May 2013, 12:40 AM   #3946
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Originally Posted by JBLman View Post
Yea, I don't know it only puts out 58vdc and can't adjust it.
All semis show proper VGS, VBE, warm up, etc.?
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Old 15th May 2013, 06:48 AM   #3947
mogliaa is offline mogliaa  United Kingdom
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Quote:
Originally Posted by Salas View Post
I will ask Crt to mark it more intuitively for the future when I will catch up with him and he has some time. Interestingly nobody reported so for missing the C1 placing, but its mainly because they use longer capacitors is my guess. Thanks for the feedback, very nice website you got BTW.
Thanks for the feedback. My intuition led me to place it centred given the multiple holes.
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Ale
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Old 21st May 2013, 07:43 PM   #3948
lucek12 is offline lucek12  Poland
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Hi Salas,
I would like to buy the pcb or the whole kit- pcb+parts. Would it be possible?
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Old 30th June 2013, 12:29 AM   #3949
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Default SSHV2 temp drift

I recently purchased and assembled a kit from Tea-Bag. Is there any likely suspects when the sshv2 is slowly decreasing in voltage as it warms up? My heatsink is more than adequate, and I have another sshv2 that has been stable in operation for over 6mos. It seems to be temp dependent, since I can blow around the board and get the voltage to drop or stop dropping for a moment. I may have zapped a device on assembly?

Also, after it has been dropped in voltage a lot (say 5 or 10 minutes), it will begin to swing more wildly. I can compensate for the drop by turning the voltage adjustment trimmer.
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Old 30th June 2013, 12:33 AM   #3950
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Its normal to drift with temp due to the semis tempco in the Vref but not wildly. 2-3V. Leave it warm up for 15mins and then set for Vo. If it continues drifting in the tens of Volt then something's not right.
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