Simplistic Mosfet HV Shunt Regs - Page 95 - diyAudio
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Old 22nd January 2010, 09:49 PM   #941
Salas is offline Salas  Greece
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Quote:
Originally Posted by Joshua_G View Post
Thanks, Salas.
Concerning the circuit on post #907, 8mA (Q4) on 200kohm (R4, R10) will drop 1,600V, so one of the two values is wrong.
No, 8ma its the free IDSS rating with a 9V battery test. The trimmer between g,s takes it down and gives us the Vout setting choice. It can even be a higher value trimmer. An 8mA IDSS 2SK170BL gives about 2mA with around 100R between g,s for instance at this circuit's VDS, under the BJT margin that is snugged in, and protected.
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Old 22nd January 2010, 10:05 PM   #942
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Okay, got it.
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Old 23rd January 2010, 01:38 AM   #943
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Default Here are all my practice

Here are all my practice “Simpler Simplistic'', please see,
Thanks a lot Salas!!!
Quanghao
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Old 24th January 2010, 07:46 AM   #944
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Originally Posted by quanghao View Post
Here are all my practice “Simpler Simplistic'', please see,
Thanks a lot Salas!!!
Quanghao
And the Board finis !,But it is wrong! you can see please!
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Old 25th January 2010, 08:29 PM   #945
Salas is offline Salas  Greece
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Hmm, not much work to get it right at least.
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Old 25th January 2010, 09:04 PM   #946
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Hi, Quanghao, forgive my ignorance, but what is this donut shaped thing on the board, at the heatsink opposite side?
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Old 25th January 2010, 09:10 PM   #947
massimo is offline massimo  Italy
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Hi, Quanghao, forgive my ignorance, but what is this donut shaped thing on the board, at the heatsink opposite side?
That small choke should be in the Heater PS section of the pcb, not in the Salas' shunt.
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Old 25th January 2010, 09:10 PM   #948
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Quote:
Originally Posted by Mosquito View Post
Hi, Quanghao, forgive my ignorance, but what is this donut shaped thing on the board, at the heatsink opposite side?
Coil.
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Old 25th January 2010, 09:36 PM   #949
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It isn't in the parts list, nor in the schematic..
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Old 25th January 2010, 09:39 PM   #950
massimo is offline massimo  Italy
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It isn't in the parts list, nor in the schematic..
Read what I wrote: not in the Salas's shunt circuit
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