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Starving Student PCB's - Page 12

post #166 of 225
Quote:
Originally Posted by dustinsterk View Post
 

Has anyone every completely got rid of the hum when you touch the volume POT?  It is so minor but annoys the hell out of me.  I have tried to ground it directly, but without any luck.

 

I was thinking of insulating the pot from the stainless volume knob...not sure if that will completely fix the problem, but worth a shot.

 

Thanks in advance.

 

--Dustin


Is there a grounding screw on your pot? The Alps pots in the plastic cases have a grounding screw. Else, ground the case. Is it in a metal case?

post #167 of 225

So just for your information, nichicon caps on the original bom are too large for this pcb. Don't make the same mistake as i did.


Edited by Jawmare - 2/10/14 at 5:13am
post #168 of 225
Quote:
Originally Posted by Jawmare View Post
 

So just for your information, nichicon caps on the original bom are too large for this pcb. Don't make the same mistake as i did.

Little more info? What original BOM? The one from the original SS thread or the one posted here in this thread?

 

I am about to order all parts can still make substitutes.

 

Thanks.

post #169 of 225
Quote:
Originally Posted by drabina View Post
 

Little more info? What original BOM? The one from the original SS thread or the one posted here in this thread?

 

I am about to order all parts can still make substitutes.

 

Thanks.


Use the part list posted in this thread.

post #170 of 225
Quote:
Originally Posted by scootsit View Post
 


Is there a grounding screw on your pot? The Alps pots in the plastic cases have a grounding screw. Else, ground the case. Is it in a metal case?

There is not a grounding screw but the POT is metal so I tried to ground the entire thing.  The case is also metal so I did ground it as well.  The noise is much quieter but not dead quiet.  It is more of an annoyance than anything...  :)

post #171 of 225

You can find my BOM here....I have made two amps from these exact parts and the fit is perfect.

 

https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=def7402dc6

post #172 of 225

I've got the bits and parts for the Jonokuchi project on the way, but I'd be interested to try out this build as well.  Can I order a couple of PCBs?

post #173 of 225
Thread Starter 

yes pm your details

post #174 of 225
Quote:
Originally Posted by dustinsterk View Post

Quote:
Originally Posted by scootsit View Post

 


Is there a grounding screw on your pot? The Alps pots in the plastic cases have a grounding screw. Else, ground the case. Is it in a metal case?
There is not a grounding screw but the POT is metal so I tried to ground the entire thing.  The case is also metal so I did ground it as well.  The noise is much quieter but not dead quiet.  It is more of an annoyance than anything...  smily_headphones1.gif

In my experience, sometimes that just happens. It may be that the pot case isn't super conductive, and grounding isn't going to work.
post #175 of 225

Anybody have Mouser part #s for the terminal blocks that would fit this PCB? I would prefer terminal blocks with a screw vs. the ones pictured on the first post.

 

Thanks.

post #176 of 225
Quote:
Originally Posted by drabina View Post
 

Anybody have Mouser part #s for the terminal blocks that would fit this PCB? I would prefer terminal blocks with a screw vs. the ones pictured on the first post.

 

Thanks.

571-282834-2

571-282834-3

post #177 of 225

Scootsit....thanks for your input!  I guess a little hum when I touch the knob is no big deal.  :)

post #178 of 225

I think you can order this PCB assembly from China,the price is reasonable and the quality is well too.www.wonderfulpcb.com and www.pcbcart.com are often I am ordered.hope can help you 

post #179 of 225

Got my PCB on Monday, thanks!  Quite a bit smaller than I expected, still thinking of case options but it should fit just about any small case.

post #180 of 225

A quick question for people who used non-metallic cases.  I'm looking to make a case from wood, with metal plates for the top and bottom.  Do I need to make sure all the metal bits are grounded to each other?  I've seen several references to grounding issues, and since the default project case is metal I wasn't sure what was required.

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