clister01
Well-known member
Hey Everyone,
Thanks for reading. I've got my green pre almost all done. Soldered all the channels, switches, LEDs, XLR connections now it just comes to wiring up the PSU and grounding stuff. If you've got a minute I could use a little clarification on some of the issues I'm having.
1) Grouding issues. Now I think I have a very basic understanding of why things need to be grounded (been reading through the METAs) but I've got a few small questions. Peter was saying in some past posts how he grounds pin 1 I think it is on the XLR connectors. Now my question is pin 1 on the XLR outputs is not connected to anything so I'm thinking I just wire up pin 1 on those and ground it to the chassis. But pin 1 on the input XLRs gets connected to the PCB. So how do I go about grounding that? Or does the PCB take care of it somehow? Is there a connection from the PCB to the chassis ground that I'm not seeing?
2) The power switch. Where/how do people wire this up? I picked up a switch with an LED built in to it from digikey (part number CKN2064-ND). I'm guessing that it's wired between the PSU PCB and the channel PCB but the number of connectors on the switch don't correspond to the number of wires coming into it. I've got 4 connections coming from the terminal blocks on the PSU. +48V, -15V, +15V, Ground. So what goes right to the PCB and what goes to the switch then to the PCBs? I've included some pics at the bottom of this post if anyone can point anything out I've missed.
3) When wiring the toroid to the PCB (I'm using digikey te62043-nd) i've wired the brown and red wires together and then wired them to the ground input on the PCB. Sounds right?
4) Is there anything else besides (I'm assuming) grounding the XLRs to chassis ground that I should be grounding to the chassis? Any connection from the PCB? From the PSU? Thanks so much..
Just getting ready to plug everything in and have it blow up so wooo! Thanks for any help! Peace
switch - http://www.CameronLister.com/pics/DSC00713.JPG
toroid/PSU - http://www.CameronLister.com/pics/DSC00707.JPG
PCB - http://www.CameronLister.com/pics/DSC00715.JPG
XLR/PCB - http://www.CameronLister.com/pics/DSC00714.JPG
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Thanks for reading. I've got my green pre almost all done. Soldered all the channels, switches, LEDs, XLR connections now it just comes to wiring up the PSU and grounding stuff. If you've got a minute I could use a little clarification on some of the issues I'm having.
1) Grouding issues. Now I think I have a very basic understanding of why things need to be grounded (been reading through the METAs) but I've got a few small questions. Peter was saying in some past posts how he grounds pin 1 I think it is on the XLR connectors. Now my question is pin 1 on the XLR outputs is not connected to anything so I'm thinking I just wire up pin 1 on those and ground it to the chassis. But pin 1 on the input XLRs gets connected to the PCB. So how do I go about grounding that? Or does the PCB take care of it somehow? Is there a connection from the PCB to the chassis ground that I'm not seeing?
2) The power switch. Where/how do people wire this up? I picked up a switch with an LED built in to it from digikey (part number CKN2064-ND). I'm guessing that it's wired between the PSU PCB and the channel PCB but the number of connectors on the switch don't correspond to the number of wires coming into it. I've got 4 connections coming from the terminal blocks on the PSU. +48V, -15V, +15V, Ground. So what goes right to the PCB and what goes to the switch then to the PCBs? I've included some pics at the bottom of this post if anyone can point anything out I've missed.
3) When wiring the toroid to the PCB (I'm using digikey te62043-nd) i've wired the brown and red wires together and then wired them to the ground input on the PCB. Sounds right?
4) Is there anything else besides (I'm assuming) grounding the XLRs to chassis ground that I should be grounding to the chassis? Any connection from the PCB? From the PSU? Thanks so much..
Just getting ready to plug everything in and have it blow up so wooo! Thanks for any help! Peace
switch - http://www.CameronLister.com/pics/DSC00713.JPG
toroid/PSU - http://www.CameronLister.com/pics/DSC00707.JPG
PCB - http://www.CameronLister.com/pics/DSC00715.JPG
XLR/PCB - http://www.CameronLister.com/pics/DSC00714.JPG
[/img]