Simplistic Mosfet HV Shunt Regs - Page 218

Audiofanatic · 17th December 2011, 12:14 PM

SOA means in Holland.

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king4joy · 17th December 2011, 12:30 PM

I now will put my SSHV2 in a plastic case for his safety....:-)

vgeorge · 22nd December 2011, 05:04 PM

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.

merlin el mago · 22nd December 2011, 05:25 PM

Quote:

Originally Posted by vgeorge

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?

vgeorge · 22nd December 2011, 05:52 PM

In fact I rebuild a 26 pre, with new boxes, better layout.

merlin el mago · 22nd December 2011, 06:21 PM

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.

vgeorge · 22nd December 2011, 06:40 PM

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.

merlin el mago · 22nd December 2011, 06:52 PM

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?

vgeorge · 22nd December 2011, 07:18 PM

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.

Salas · 22nd December 2011, 07:25 PM

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?

17th December 2011, 12:14 PM	#2171
Audiofanatic diyAudio Member Join Date: Oct 2002 Location: The Netherlands, Utrecht	SOA in Holland SOA means in Holland. Sexually Transmitted Diseases Audiofanatic __________________ Be nice to animals.

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17th December 2011, 12:30 PM	#2172
king4joy diyAudio Member Join Date: Apr 2011	I now will put my SSHV2 in a plastic case for his safety....:-)

22nd December 2011, 05:52 PM	#2175
vgeorge diyAudio Member Join Date: Mar 2004 Location: poros island	In fact I rebuild a 26 pre, with new boxes, better layout.

22nd December 2011, 06:21 PM	#2176
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	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.

22nd December 2011, 06:52 PM	#2178
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	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?

22nd December 2011, 07:18 PM	#2179
vgeorge diyAudio Member Join Date: Mar 2004 Location: poros island	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.

22nd December 2011, 07:25 PM	#2180
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	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?