Scalable PSU/regulator GB - Page 51

BobEllis · 27th November 2006, 04:43 PM

Other than removing the short circuit protection, it seems like it should be fine.

JensRasmussen · 27th November 2006, 04:43 PM

Andy,

A diode solves the problem with startup, but I could not fit it on the board when I designed it....

Maybe I should try again, and get rid of the optional ref part (The standard zener)

\Jens

AndyB · 27th November 2006, 11:41 PM

Quote:

Originally posted by BobEllis
Other than removing the short circuit protection, it seems like it should be fine.

I can live with that

Andy

dick van nierop · 2nd January 2007, 09:12 AM

I had some problems with the negative board as a result of my own doing. I now have to replace the transistors but cannot find the exact BC- and MJE-types over here.
Can they be replaced by others and if so should I replace the transistors on the +board too?

BobEllis · 2nd January 2007, 11:10 AM

I suppose you could try any small signal transistor of the appropriate polarity, or you could wait or the BCs I am about to mail to arrive.

To the same address as before?

dick van nierop · 2nd January 2007, 08:45 PM

Hi Bob

As always you are being most helpful.
May I wish you the best in 2007 and a happy diy year.

Are you ordering BC556C and 546C?
I can get plenty of the B-variant over here but they have a different gainfactor. Don't know what that would do to the performance.
Are you by any chance also ordering the MJE's? Can't get those either.

I'll also ask KRO where he gets his.

BobEllis · 2nd January 2007, 08:53 PM

I'm not ordering, I still have a few thousand BC546C and 556C from PSU round 1. I'm not planning to order any MJEs anytime soon - I have enough for now, but unfrtunately just a few extra. I always seem to smoke a couple along the way.

dick van nierop · 2nd January 2007, 09:37 PM

Thanks for answering, Bob.
I'll soon let you know if I would like you to send me some BC's.

dfdye · 2nd January 2007, 10:02 PM

Quote:

Originally posted by BobEllis
I'm not ordering, I still have a few thousand BC546C and 556C from PSU round 1.

LOL

Well, I did my part to help and get rid of some!

You originally ordered 10K, right?

BobEllis · 2nd January 2007, 11:47 PM

Yep, 10K of each. Sort of disappointing that they took up so little space.

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
Zener regulator with "integrated" pre-regulator	00940	Power Supplies	17	22nd July 2008 06:11 PM
Lithos regulator - A new super regulator?	peranders	Parts	7	8th May 2008 03:01 PM
Scalable Power Supply GB	BobEllis	Solid State	0	3rd April 2006 06:11 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

27th November 2006, 04:43 PM	#501
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	Other than removing the short circuit protection, it seems like it should be fine.

27th November 2006, 04:43 PM	#502
JensRasmussen diyAudio Member Join Date: Jul 2002 Location: Denmark - Jutland	Andy, A diode solves the problem with startup, but I could not fit it on the board when I designed it.... Maybe I should try again, and get rid of the optional ref part (The standard zener) \Jens

2nd January 2007, 09:12 AM	#504
dick van nierop diyAudio Member Join Date: Sep 2002 Location: Berg en terblijt	I had some problems with the negative board as a result of my own doing. I now have to replace the transistors but cannot find the exact BC- and MJE-types over here. Can they be replaced by others and if so should I replace the transistors on the +board too?

2nd January 2007, 11:10 AM	#505
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	I suppose you could try any small signal transistor of the appropriate polarity, or you could wait or the BCs I am about to mail to arrive. To the same address as before?

2nd January 2007, 08:45 PM	#506
dick van nierop diyAudio Member Join Date: Sep 2002 Location: Berg en terblijt	Hi Bob As always you are being most helpful. May I wish you the best in 2007 and a happy diy year. Are you ordering BC556C and 546C? I can get plenty of the B-variant over here but they have a different gainfactor. Don't know what that would do to the performance. Are you by any chance also ordering the MJE's? Can't get those either. I'll also ask KRO where he gets his.

2nd January 2007, 08:53 PM	#507
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	I'm not ordering, I still have a few thousand BC546C and 556C from PSU round 1. I'm not planning to order any MJEs anytime soon - I have enough for now, but unfrtunately just a few extra. I always seem to smoke a couple along the way.

2nd January 2007, 09:37 PM	#508
dick van nierop diyAudio Member Join Date: Sep 2002 Location: Berg en terblijt	Thanks for answering, Bob. I'll soon let you know if I would like you to send me some BC's.

2nd January 2007, 11:47 PM	#510
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	Yep, 10K of each. Sort of disappointing that they took up so little space.

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