Hi everyone:
I've received so much help from you all on my Chipamp project, that I thought I'd make an (albeit small) contribution back. Here is a pic. of the Chipamp.com PSU with part numbers on top, as well as the LED power light indicator circuit and parts.
Hope this helps someone.
I've received so much help from you all on my Chipamp project, that I thought I'd make an (albeit small) contribution back. Here is a pic. of the Chipamp.com PSU with part numbers on top, as well as the LED power light indicator circuit and parts.
Hope this helps someone.
Attachments
I think both the schematic and the PCB are correct. If you measure the DC at the outputs you’ll find the +/- orientation is exactly the same even though the outputs are marked (from left-to-right) as V+/PG+ then PG-/V- If you reverse the polarity of your probes you’ll measure the direct opposite polarity from the V/PG outputs on their respective sides. https://www.electronics-tutorials.ws/diode/diode_6.html
Will likely work better if the snubber components are connected closer (directly) to the rectifier diodes (source of hf shot noise) and not at the opposite end of the board, inches away from them and the added inductance of the filter capacitors as well.
Pretty nice to have a board with everything on it though, much cleaner looking than some of my setups!
Pretty nice to have a board with everything on it though, much cleaner looking than some of my setups!
Tom Christiansen (Neurochrome Audio) has just posted a very interesting article - Rectification and Snubbers, well worth a read.
Power Supply Design: Rectification & Snubbers.
Power Supply Design: Rectification & Snubbers.
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Not only do I claim that the addition of snubbers will not make any difference to the output of an audio amplifier, I validate that claim with measurements.
Adding a snubber might make a difference on whether your amplifier can pass the regulatory requirements for EMI, but that's another story.
Tom
Adding a snubber might make a difference on whether your amplifier can pass the regulatory requirements for EMI, but that's another story.
Tom
Not only do I claim that the addition of snubbers will not make any difference to the output of an audio amplifier, I validate that claim with measurements.
Adding a snubber might make a difference on whether your amplifier can pass the regulatory requirements for EMI, but that's another story.
Tom
Hello Tom,
Where is this post?
[edit, nevermind, I found it Taming the LM3886 Chip Amplifier: Rectification and Snubbers – Neurochrome ]
Thank you,
David.
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