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

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21st November 2009, 12:38 AM	#471
merlin2069er Account disabled at member's request 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 Account disabled at member's request 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 Account disabled at member's request 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 Account disabled at member's request 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.