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Title: 5E3 chassis grounding question Post by: grod915 on April 15, 2009, 09:52:03 PM Hi all,
I'm presently working on my first build, a 5E3 using a Ceriatone head chassis. These chassis are powder coated. Do I need to remove the coating for anything other than my ground points? (I’m using one ground at the transformer and a buss grounded at the second filter cap for everything else) Specifically, do I need to remove the coating for the pots, switches, input/output jacks etc.? The amp is nearing completion and I'm getting worried that I've made a mistake not removing the powder coating, especially at the pots. Thanks for any help. Gerry Here's a bunch of pics : http://s90.photobucket.com/albums/k272/grod915/5E3%20Project%20Pics/?albumview=slideshow Title: Re: 5E3 chassis grounding question Post by: cmoore on April 16, 2009, 12:48:53 AM Hey Gerry -
Just want to make sure I understand you correctly. Are you using some kind of star ground/ground buss that ties EVERYTHING to ground at either the PT or the filter cap? If that is true then you are fine the way you are. IMO it is best to not have any redundant ground. I think it works out good for you that the chassis IS painted. As you say, just scrape off the paint at your two ground points and you are done. If, of course, you were planning to ground the pots and jacks via the chassis, then you have a problem. But something tells me you have it all figured out to perfection. :) Title: Re: 5E3 chassis grounding question Post by: grod915 on April 16, 2009, 06:12:28 AM As you say, just scrape off the paint at your two ground points and you are done. Awsome. This is what i've done. The speaker output jacks, mains ground, power transformer grounds and first filter cap/power tube cathode resister & cap are all grounded at the corner of the power transformer. The volume/ tone control grounds I fed back to the input jacks and have just one ground off of the input jack attached to the first point on my ground buss. All circuit board grounds are attached further along the buss and the buss is terminated/attached to the chassis at the second filter cap. Thanks for the help, I feel much more confident about this now!Gerry |