Building a symmetrical psu B1 buffer - Page 48

merlin2069er · 21st November 2009, 12:38 AM

Yes , bc517 was on v4.2 bom, and I've got it on my board.

Salas · 21st November 2009, 12:39 AM

Highly unlike to have any relay buzz then. Just keep your 150n until you test.

merlin2069er · 21st November 2009, 12:43 AM

Sorry, I just fixed it.

Should I use the 100uf near the bc517 (I do have a few spares).

Salas · 21st November 2009, 12:47 AM

The 100 microfarad between the 2 BC transistors and the 47K resistor is absolutely essential for the time delay to work. Quality=irrelevant.

Salas · 21st November 2009, 12:49 AM

Quote:

Originally Posted by merlin2069er

Sorry, I just fixed it.

Thumbnail though.

merlin2069er · 21st November 2009, 12:56 AM

Argh!!! Can't edit my post.

Ok, here's a link to my dcb1 buffer album...

Picasa Web Albums - Joe - DCB1

Salas · 21st November 2009, 12:59 AM

Nice progress, nothing untoward. The 100uF in the delay bay is missing. Is your solder ROHS?

merlin2069er · 21st November 2009, 01:02 AM

I sure hope so, I forget where I bought it. Maybe partsconnexion.

I know the 100uf is missing there. I thought the 150nf was supposed to go beside the dc517.

I'll put the 100uf in there then.

Salas · 21st November 2009, 01:04 AM

I was hoping not so.

So it could help with flow.

Phil Townsend · 21st November 2009, 04:52 AM

Mouser does not seem to have any 2SK170... at leastnot for 8 weeks!!!

Anybody out there have some Jfet's they wanna let go of???
Or a link will do just fine

Thanks

21st November 2009, 04:52 AM	#480
Phil Townsend diyAudio Member Join Date: Jun 2004 Location: Santa Fe, New Mexico	Where have all the Jfet;s gone long time passing Mouser does not seem to have any 2SK170... at leastnot for 8 weeks!!! Anybody out there have some Jfet's they wanna let go of??? Or a link will do just fine Thanks __________________ Phil Santa Fe

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
New-building of my B1 buffer	Babowana	Pass Labs	328	20th February 2010 02:14 AM

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 November 2009, 12:38 AM	#471
merlin2069er diyAudio Member Join Date: Sep 2008 Location: Toronto Blog Entries: 1	Yes , bc517 was on v4.2 bom, and I've got it on my board.

21st November 2009, 12:39 AM	#472
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Highly unlike to have any relay buzz then. Just keep your 150n until you test.

21st November 2009, 12:43 AM	#473
merlin2069er diyAudio Member Join Date: Sep 2008 Location: Toronto Blog Entries: 1	Sorry, I just fixed it. Should I use the 100uf near the bc517 (I do have a few spares).

21st November 2009, 12:47 AM	#474
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	The 100 microfarad between the 2 BC transistors and the 47K resistor is absolutely essential for the time delay to work. Quality=irrelevant.

21st November 2009, 12:56 AM	#476
merlin2069er diyAudio Member Join Date: Sep 2008 Location: Toronto Blog Entries: 1	Argh!!! Can't edit my post. Ok, here's a link to my dcb1 buffer album... Picasa Web Albums - Joe - DCB1

21st November 2009, 12:59 AM	#477
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Nice progress, nothing untoward. The 100uF in the delay bay is missing. Is your solder ROHS?

21st November 2009, 01:02 AM	#478
merlin2069er diyAudio Member Join Date: Sep 2008 Location: Toronto Blog Entries: 1	I sure hope so, I forget where I bought it. Maybe partsconnexion. I know the 100uf is missing there. I thought the 150nf was supposed to go beside the dc517. I'll put the 100uf in there then.

21st November 2009, 01:04 AM	#479
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	I was hoping not so. So it could help with flow.