[sdiy] Avoiding Ground Loops on Panels

[Steve Allen]

Great articles Tim, thanks for all the heavy duty surfin'.
 Thanks for all the motivatin'  questions Scott.
 Now it's off to start rewiring everything in the house
 Steve

Tim Johnson <ifixaudio at hotmail.com> wrote:
Wow, that took some surfin' but here ya go Scott.

My quest for insulated jack bushings for you took me to the following snip 
from the Aiken amps site for members seeking insulated 1/4" style at:

http://www.aikenamps.com/StarGround.html

>>How are the input jacks isolated?
>There are some good isolated jacks available from Cliff and Rean that most 
>companies use. Stay >away from the plastic-nosed units and get the better 
>chrome ferrule jacks. These are now being >supplied by Neutrik, who 
>purchased Rean. They aren't as good a quality as Switchcraft jacks, but 
> >they are isolated. You can use shoulder washers to isolate the 
>Switchcraft type jacks, if you can >find one that will fit the hole. 
>Newark Electronics carries them, but they are not listed in the >catalog. 
>The part numbers are: 94F8935 (Switchcraft S1028) @ $0.13 ea. and 94F8936 
>(S1029) >@ $0.28 ea. These mount in a 7/16" hole - not a 1/2" like the old 
>ones.

Which in turn sent me to the Switchcraft site below with associated 
schematic link that states the part you need is an S1564 (Newark part 
#27B9044) and an S2207.

http://www.switchcraft.com/products/jack-112.html

And the hardware list, with drawings link.

http://www.switchcraft.com/products/jack-147.html

Your welcome, hope this helps and
Happy Holidays

Jim(whew)

>From: "Scott Stites" 
>To: synth-diy at dropmix.xs4all.nl
>Subject: [sdiy] Avoiding Ground Loops on Panels
>Date: Tue, 23 Dec 2003 10:03:53 -0800 (PST)
>
>Hi List,
>
>I've been building panels for my synth using un-anodized aluminum stock. I 
>plan
>to put the legends onto the panels much in the same way that Ray Wilson did 
>with
>his mini-synth, IE laminating paper labels onto them as shown here:
>
>http://www.musicfromouterspace.com/analogsynth/SOUNDLABMINISYNTH/soundlab.html
>
>The connectors I'm using, 3.5 mm, will still ground to the back of the 
>panel,
>which to me means that I'm just asking for ground loops. I thought about 
>DIY
>anodizing, but stopped reading pretty soon into it when it mentioned the 
>vat of
>sulphuric acid that I'd need.
>
>So - how does one fully isolate the ground on the connectors from the panel 
>in
>this case? I recall someone mentioning that they used nylon washers. 
>Where
>could I find these washers? Is there some sticky mylar tape I can get? 
>Will a
>clear coat of laminate isolate the whole panel? Am I asking too many 
>questions?
>
>Any advice most appreciated,
>Cheers,
>Scott



>From: "Scott Stites" 
>To: synth-diy at dropmix.xs4all.nl
>Subject: [sdiy] Avoiding Ground Loops on Panels
>Date: Tue, 23 Dec 2003 10:03:53 -0800 (PST)
>
>Hi List,
>
>I've been building panels for my synth using un-anodized aluminum stock. I 
>plan
>to put the legends onto the panels much in the same way that Ray Wilson did 
>with
>his mini-synth, IE laminating paper labels onto them as shown here:
>
>http://www.musicfromouterspace.com/analogsynth/SOUNDLABMINISYNTH/soundlab.html
>
>The connectors I'm using, 3.5 mm, will still ground to the back of the 
>panel,
>which to me means that I'm just asking for ground loops. I thought about 
>DIY
>anodizing, but stopped reading pretty soon into it when it mentioned the 
>vat of
>sulphuric acid that I'd need.
>
>So - how does one fully isolate the ground on the connectors from the panel 
>in
>this case? I recall someone mentioning that they used nylon washers. 
>Where
>could I find these washers? Is there some sticky mylar tape I can get? 
>Will a
>clear coat of laminate isolate the whole panel? Am I asking too many 
>questions?
>
>Any advice most appreciated,
>Cheers,
>Scott
>
>________________________________________________
>PeoplePC: It's for people. And it's just smart.
>http://www.peoplepc.com

_________________________________________________________________
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