Using the HYPNOTIZE as a general shunt reg PCB - Page 54

acidbrain · 21st July 2011, 07:43 PM

Yes, i did read that in the manual for the BiB shunt. But with more uF the sound from a certain cap ( Obbligato in my case) will also be stronger present in the music, maybe too much. I want to adjust the sound, for me that's even more important than have the best filtering. This adjusting to optimal will take a lot of time.

The surface is varnished, but the layer is very thin. Maybe I can use a wire on a cleaned part of the cap and then use schrinking tube to isolate the cap.
The wires of the cap can also touch the copper tube, so isolating is a good thing here.

Salas · 21st July 2011, 07:47 PM

If you have ears and time for fine tunings its a nice thing, there are always things to try.

acidbrain · 21st July 2011, 08:04 PM

That finetuning would be a lot more difficult to do if I didn't had your shunts Salas !

buzzforb · 28th November 2011, 11:51 PM

What importance do resistor choices play into using this as just a PSU. I know i could read through 2000 pages of various comments, but am short on that kind of time.

Salas · 29th November 2011, 07:09 AM

Beyond using low ppm with proper wattage not to get hot for the voltage ref resistor value you are going to end up with, don't bother.

buzzforb · 29th November 2011, 08:59 AM

Thanks for the quick reply.

buzzforb · 16th December 2011, 01:27 AM

Salas,
You give an explanation on how to figure numbers but is there a link to a description of how the circuit functions. I think I have a general understanding, but would like to know more specifically how it all works. Only shunt regulated article I can find is Jungs differential version.

Salas · 16th December 2011, 01:38 AM

I had written several times in the threads. In general the input section consists of a Mosfet constant current source held open steadily by the leds and a resistor fixes its current. A jfet ccs makes the leds even steadier. That is to insulate the regulator from the rectification in both directions. The voltage reference is made up by the more leds, again Jfet ccsed. That reference the bjt compares to the output and gives correction signal to the shunt output mosfet. The bjt has another ccs for load than just a resistor. Increases its efficiency. What current is extra to consumption and coming from the main Mosfet CCS is shunted to ground keeping the shunt Mosfet low impedance. That's about it.

buzzforb · 16th December 2011, 08:47 AM

Thanks. I am new to BJT's, only using fets up to this point, and wasn't totally sure if this was the control mechanism. I also found DougL's writeup in the wiki. I noticed that in the BiB, you switched to the 117 vs 170, would the performance gain be similar in this setup?

Salas · 16th December 2011, 09:59 AM

No, don't switch in this one.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Simple Super Shunt and Simple Super Shunt w/CCS vs. JSR03/05 (and other series regs)	hollowman	Power Supplies	44	7th October 2009 07:01 AM
General purpose shunt regulator	Lumba Ogir	Solid State	73	12th February 2009 09:00 AM
Shunt volume controll (scaling the shunt resistors)	Freddie	Solid State	7	30th August 2001 09:47 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

21st July 2011, 07:43 PM	#531
acidbrain diyAudio Member Join Date: May 2008	Yes, i did read that in the manual for the BiB shunt. But with more uF the sound from a certain cap ( Obbligato in my case) will also be stronger present in the music, maybe too much. I want to adjust the sound, for me that's even more important than have the best filtering. This adjusting to optimal will take a lot of time. The surface is varnished, but the layer is very thin. Maybe I can use a wire on a cleaned part of the cap and then use schrinking tube to isolate the cap. The wires of the cap can also touch the copper tube, so isolating is a good thing here.

21st July 2011, 07:47 PM	#532
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	If you have ears and time for fine tunings its a nice thing, there are always things to try.

21st July 2011, 08:04 PM	#533
acidbrain diyAudio Member Join Date: May 2008	That finetuning would be a lot more difficult to do if I didn't had your shunts Salas !

28th November 2011, 11:51 PM	#534
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	What importance do resistor choices play into using this as just a PSU. I know i could read through 2000 pages of various comments, but am short on that kind of time.

29th November 2011, 07:09 AM	#535
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Beyond using low ppm with proper wattage not to get hot for the voltage ref resistor value you are going to end up with, don't bother.

29th November 2011, 08:59 AM	#536
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	Thanks for the quick reply.

16th December 2011, 01:27 AM	#537
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	Salas, You give an explanation on how to figure numbers but is there a link to a description of how the circuit functions. I think I have a general understanding, but would like to know more specifically how it all works. Only shunt regulated article I can find is Jungs differential version.

16th December 2011, 01:38 AM	#538
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	I had written several times in the threads. In general the input section consists of a Mosfet constant current source held open steadily by the leds and a resistor fixes its current. A jfet ccs makes the leds even steadier. That is to insulate the regulator from the rectification in both directions. The voltage reference is made up by the more leds, again Jfet ccsed. That reference the bjt compares to the output and gives correction signal to the shunt output mosfet. The bjt has another ccs for load than just a resistor. Increases its efficiency. What current is extra to consumption and coming from the main Mosfet CCS is shunted to ground keeping the shunt Mosfet low impedance. That's about it.

16th December 2011, 08:47 AM	#539
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	Thanks. I am new to BJT's, only using fets up to this point, and wasn't totally sure if this was the control mechanism. I also found DougL's writeup in the wiki. I noticed that in the BiB, you switched to the 117 vs 170, would the performance gain be similar in this setup?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

16th December 2011, 09:59 AM	#540
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	No, don't switch in this one.