Author Topic: Single Transistor Boost PCB Layout  (Read 2169 times)

Joe Hart

Single Transistor Boost PCB Layout
« on: August 04, 2011, 12:31:50 PM »
Can someone please check my layout? I think it's good, but a different set of eyes may see something I missed (and I've never done my own layout before).

Here's the schematic:

And here's my layout:


Thanks!
-Joe Hart

John Lyons

Re: Single Transistor Boost PCB Layout
« Reply #1 on: August 04, 2011, 12:42:55 PM »
Looks good to me.
You don't need the 1M pulldown at the end though
as the .1 output cap will discharge through the 50K
volume pot.
Basic Audio Pedals
www.basicaudio.net/

Steve Mavronis

Re: Single Transistor Boost PCB Layout
« Reply #2 on: August 04, 2011, 12:47:56 PM »
PCB layout wise, if you rotate that transistor counter-clockwise 90 degrees your traces could cleanly route to it more directly, but might not have to depending on its physical placement.
« Last Edit: August 04, 2011, 12:49:33 PM by Steve Mavronis »
Guitar > Neo-Classic 741 Overdrive > Boss NS2 Noise Suppressor > DOD BiFET Boost 410 > VHT Special 6 Ultra Combo Amp Input > Amp Send > MXR Carbon Copy Analog Delay > Boss RC3 Loop Station > Amp Return

Joe Hart

Re: Single Transistor Boost PCB Layout
« Reply #3 on: August 04, 2011, 12:53:11 PM »
Looks good to me.
You don't need the 1M pulldown at the end though
as the .1 output cap will discharge through the 50K
volume pot.

Yay! I did the layout correctly. I will get rid of the 1M at the end. Thanks!
-Joe Hart

Steve Mavronis

Re: Single Transistor Boost PCB Layout
« Reply #4 on: August 04, 2011, 12:56:19 PM »
A dumb question on my part because I don't know and trying to learn - is it normal for the positive side of a cap to be grounded?
Guitar > Neo-Classic 741 Overdrive > Boss NS2 Noise Suppressor > DOD BiFET Boost 410 > VHT Special 6 Ultra Combo Amp Input > Amp Send > MXR Carbon Copy Analog Delay > Boss RC3 Loop Station > Amp Return

Joe Hart

Re: Single Transistor Boost PCB Layout
« Reply #5 on: August 04, 2011, 12:56:58 PM »
PCB layout wise, if you rotate that transistor counter-clockwise 90 degrees your traces could cleanly route to it more directly, but might not have to depending on its physical placement.
Thanks, Steve. The issue is that I want the transistor part number clearly visible. The boost sounds super evil and the number printed on the transistor is "666"! That needs to take precedence!!
-Joe Hart

Joe Hart

Re: Single Transistor Boost PCB Layout
« Reply #6 on: August 04, 2011, 12:58:07 PM »
A dumb question on my part because I don't know and trying to learn - is it normal for the positive side of a cap to be grounded?
The pedal is negative supply, so the positive goes to ground.
-Joe Hart