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Simplistic Mosfet HV Shunt Regs
Simplistic Mosfet HV Shunt Regs
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Old 17th December 2011, 12:14 PM   #2171
Audiofanatic is offline Audiofanatic  Netherlands
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Old 17th December 2011, 12:30 PM   #2172
king4joy is offline king4joy  Hong Kong
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I now will put my SSHV2 in a plastic case for his safety....:-)
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Old 22nd December 2011, 05:04 PM   #2173
vgeorge is offline vgeorge  Greece
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Simplistic Mosfet HV Shunt Regs
Today I decided to finish my second SSHV2 for the pre I am building.
Both shunts on the test bed working nicely, and voltage is very stable.
Just be careful if you use long cables without any decoupling. I managed to get it into oscillation with very long test cables. A cap near the input and everything is fine. Nothing burned this time, but future builders do not take the risk.
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Old 22nd December 2011, 05:25 PM   #2174
merlin el mago is offline merlin el mago
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Quote:
Originally Posted by vgeorge View Post
Today I decided to finish my second SSHV2 for the pre I am building.
Both shunts on the test bed working nicely, and voltage is very stable.
Just be careful if you use long cables without any decoupling. I managed to get it into oscillation with very long test cables. A cap near the input and everything is fine. Nothing burned this time, but future builders do not take the risk.
Just curiosity, wich pre are you building?
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Old 22nd December 2011, 05:52 PM   #2175
vgeorge is offline vgeorge  Greece
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Simplistic Mosfet HV Shunt Regs
In fact I rebuild a 26 pre, with new boxes, better layout.
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Old 22nd December 2011, 06:21 PM   #2176
merlin el mago is offline merlin el mago
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Please when you can post pics in the #26 thread. I'm very interested, still pending to buy the boxes so if I see your #26 I will have an idea. Nick sorry for OT.
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Old 22nd December 2011, 06:40 PM   #2177
vgeorge is offline vgeorge  Greece
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Simplistic Mosfet HV Shunt Regs
Just to get an idea about the boxes.
Wooden chassis - self made - with aluminum top.
As for the rest, nothing new, filament bias with Rod' s boards, SSHV2, AVC volume control. PS box finished, just messing with the layout of the pre now.
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Old 22nd December 2011, 06:52 PM   #2178
merlin el mago is offline merlin el mago
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Thanks for the pics, congratulations looks very good. Where are the mains transformers & B+ chokes, inside the box where is the tube rectifier? I use also the same AVC volume control & output tx, did you bought to Thomas as me?
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Old 22nd December 2011, 07:18 PM   #2179
vgeorge is offline vgeorge  Greece
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Simplistic Mosfet HV Shunt Regs
Power transformer 2x220V, 5R4GY rectifier, choke input ll1673, ll1660PP for output transformer and AVC from Intact audio.
Also got some nice BIG 10ohm 100W Dale resistor for filament bias.
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Old 22nd December 2011, 07:25 PM   #2180
Salas is offline Salas  Greece
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Simplistic Mosfet HV Shunt Regs
Looks good George. Did you decouple the long input leads giving you trouble right at the input connector? And with what C value? 0.1uF?

P.S. Or is it the big one at the crock clips decoupling further down the road?
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