Simplistic Mosfet HV Shunt Regs - Page 218 - diyAudio
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Old 17th December 2011, 12:14 PM   #2171
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Old 17th December 2011, 12:30 PM   #2172
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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
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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
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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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In fact I rebuild a 26 pre, with new boxes, better layout.
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Old 22nd December 2011, 06:21 PM   #2176
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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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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
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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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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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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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