I was planning on using LM317/337 simply because I have some on hand. They've been said to be better than 78xx/79xx regulators, but I doubt they are *very* much better.
That said, there is a fair amount of room on the PCB if someone wanted to improvise a small discrete daughter board or some such thing 🙂
Here's a deadbug build of Joe Curcio's LM4562-based preamp from National's app note 1651 that I made last year. I designed a circuit board and redid it a few months ago. Building deadbug style and designing a PCB were both new experiences for me.
- Eric
Attachments
make your "own" shunt reg :
-The simplistic Salas low voltage shunt regulator
- Using the HYPNOTIZE as a general shunt reg PCB
-The simplistic Salas low voltage shunt regulator
- Using the HYPNOTIZE as a general shunt reg PCB
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I collected my boards today. What a class act!!
They are BIG! Easy to read, nicely spread out... and they just have a classy feel about them.
Thank you everyone at Pass labs! Can't wait for the article.
They are BIG! Easy to read, nicely spread out... and they just have a classy feel about them.
Thank you everyone at Pass labs! Can't wait for the article.
I'm at Sea Ranch editing the article for Wayne. It's taking a
long time because a lot of the captured graphics have to be
hand-jobbed to be clearly legible. It's almost done...
😎
long time because a lot of the captured graphics have to be
hand-jobbed to be clearly legible. It's almost done...
😎
Take your time...editing.
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There's a TP & note in the silk to set P1 for 0 volts. So that's taken care of. Just need to figure out how to calc Cx & Rx. (I'm still confused by Cx. I need to brush up big time on my circuit analysis.)
But it's so much easier to wait for Wayne and Mr. N.P. 🙂
(uh... not holding my breath, but I'm sure it'll be done in due time)
Thanks!
-Chris
RX can just be a jumper wire or 10 - 100 Ohms. RX and CX are for future experimentation. Such as making EQ passive/active. Leave CX open for now.
I have a silly question that I hope no one minds me asking.
Is anyone going to be going from their TT -> Pearl 2 -> to B1 Buffer -> amp? Or do I just not understand the purpose of the B1 Buffer? Thanks.
James
Is anyone going to be going from their TT -> Pearl 2 -> to B1 Buffer -> amp? Or do I just not understand the purpose of the B1 Buffer? Thanks.
James
That's my plan! And, my boards landed today. Many thanks to the Pass team, and of course, diyaudio!
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Thanks for the response. I may have to look a bit more on that B1. I would love it if there was a place to by the housing and components at one shot (or at least a complete list). There probably is but I have not looked around as of yet.
James
James
Cntact member Westend. If he still has some of the extrusion left, he makes a dandy box. Mine was very reasonable.
Russellc
Perhaps the output impedance of the Pearl 2 is sufficiently low for a buffer to be unnecessary. Anyone know?
Well I was lucky enough to find a link in the B1 section that took me over to a page on Audio Circle that has a BOM for it. I will slowly start to purchase everything for the B1 and Pearl 2. Since this is my first endeavor into this type of work I want to take it slow and not overwhelm myself. Heck, reading half of what you guys write makes me want to go back into my little hole.
James
James