Grounding on a wooden chassis

sweet & juicy SE amp for 1626 Darlings and the 6L6 family

Grounding on a wooden chassis

Postby Ludwig » Mon Jun 15, 2015 7:35 am

I recently purchased a wooden chassis with two metal plates for my Clem build.

The top plate (on which the tubes and the transformers sit) is metal, along with the rear plate (on which the speaker binding posts and input RCA jacks sit). Everything else is wood.

Is it best to have the star grounding point on the rear metal panel, or on the top plate?
Ludwig
 
Posts: 37
Joined: Tue Jan 27, 2015 8:01 pm

Re: Grounding on a wooden chassis

Postby EWBrown » Mon Jun 15, 2015 9:05 am

The star ground should be on the top plate, just ground the rear plate to the "star" point on the top plate.

HTH

/ed B
Real Radios Glow in the Dark
User avatar
EWBrown
Insulator & Iron Magnate
 
Posts: 6363
Joined: Wed Mar 19, 2003 6:03 am
Location: Now located in Clay County, NC !

Re: Grounding on a wooden chassis

Postby Ludwig » Tue Jun 16, 2015 3:07 pm

Ok thanks.

And re the IEC socket earth pin? I've read that it is best to ground it as close as possible to the IEC socket. This would mean grounding it on the rear plate. Is it best to then drill another hole in the rear plate, put a bolt and then connect it to the top plate with a wire link? I do notice that some people connect the earth (house) ground pin to the circuit ground by some kind of sequence of diodes &/or capacitors, why is this done?
Ludwig
 
Posts: 37
Joined: Tue Jan 27, 2015 8:01 pm

Re: Grounding on a wooden chassis

Postby Shannon Parks » Wed Jun 17, 2015 6:54 am

Have the safety ground lug on the top plate. You want any transformer leakage currents with a low return path. Ed's advice is spot on.

Shannon
User avatar
Shannon Parks
Site Admin
 
Posts: 3759
Joined: Tue Mar 18, 2003 5:40 pm
Location: Poulsbo, Washington

Re: Grounding on a wooden chassis

Postby EWBrown » Wed Jun 17, 2015 8:14 am

I normally use one of the power transformer mounting screws as the star grounding and safety ground common point. Saves drilling one extra hole.

/ed B
Real Radios Glow in the Dark
User avatar
EWBrown
Insulator & Iron Magnate
 
Posts: 6363
Joined: Wed Mar 19, 2003 6:03 am
Location: Now located in Clay County, NC !


Return to clementine

Who is online

Users browsing this forum: No registered users and 1 guest