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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 18th September 2019, 03:49 PM   #1
dwinstonwood is offline dwinstonwood
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Join Date: Oct 2015
Default Do I finally understand SSE grounding? I hope!

After spending a few evenings (several hours) searching this forum, and using Google, I think I might finally have a basic handle on grounding the SSE I'm building...

My chassis is an aluminum box.

My amp will not be wired for CFB or UL, just the basic configuration.

My RCA jacks, speaker terminals, and volume pot will ALL be isolated from the chassis.

My star ground is a bolt attached to the aluminum chassis.

OK, as I now understand it (fingers crossed):

The RCA inputs and my Alps blue volume pot are "in effect" part of the PCB unit as a whole. Therefore, ONE single wire from ONE single RCA ground lug (not both) is the ONLY wire I need to attach to my star ground.

Because I am not using CFB, my speaker terminals are NOT part of this "PCB Unit." Therefore, BOTH speaker terminals each need a ground wire running to the star ground.

Everything else: all three transformers, the choke, and the motor-run cap housing also need to be connected to the star ground, or the chassis.

The star ground is connected to the power module ground.

Please let me know if I have something wrong, or missed something.
Thanks! David
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Old 18th September 2019, 07:21 PM   #2
PDL is offline PDL  United States
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Location: Minneapolis
Quote:
Originally Posted by dwinstonwood View Post

Because I am not using CFB, my speaker terminals are NOT part of this "PCB Unit." Therefore, BOTH speaker terminals each need a ground wire running to the star ground.
Just to clarify, you are only going to ground ONE speaker terminal from EACH of the output transformers (two grounds total), not BOTH speaker terminals from each of the output transformers (four grounds total)?
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Old 18th September 2019, 08:30 PM   #3
dwinstonwood is offline dwinstonwood
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Thanks PDL, yes, that is what I meant to say: two wires total from the speaker terminals (one from each black terminal).
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Old 19th September 2019, 01:26 PM   #4
dwinstonwood is offline dwinstonwood
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Join Date: Oct 2015
I'm looking at this hook-up wire to purchase:

22 awg, PVC, solid copper, 600v, 105c

JMS9313-01G: Jameco Valuepro : 22AWG 6-Color Tinned-Copper Wire Assortment : Wire & Cable

Is this ok?
Thanks
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