[scootsit]

  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?

 

[Jawmare]

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.

 

[drabina]

  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.

 

[Jawmare]

  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.

 

[dustinsterk]

 
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...  

 

[dustinsterk]

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

 

[Greystoke]

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?

 

[Fred_fred2004]

yes pm your details

 

[scootsit]

 


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...  

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.

 

[drabina]

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.

 

[Jawmare]

  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

 

[dustinsterk]

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

 

[wastaner]

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 

 

[Greystoke]

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.

 

[Greystoke]

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.