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August 24, 2019, 04:49:31 AM

Author Topic: Grounding terminal 21L  (Read 288 times)

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Offline Raymond P.

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Grounding terminal 21L
« on: November 05, 2018, 10:22:50 AM »
Hi,


From checking pass postings, I see that terminal 21 is grounded through the transformer bell. However, I have already painted the bells and don't really want to scrape off any paint (knowing me, I'll probably mess it up). Is it ok to ground terminal 21 by connecting it with a wire to a ground tab, such as the one next to the "C" socket?


Thx.
Raymond P.

Offline Paul Birkeland

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Re: Grounding terminal 21L
« Reply #1 on: November 05, 2018, 10:45:07 AM »
Tightening down the transformer hardware should be enough to provide a ground for you there.  Do not, under any circumstances, start wiring in extra grounds to make these connections. 
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Raymond P.

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Re: Grounding terminal 21L
« Reply #2 on: November 05, 2018, 11:43:23 AM »
Ok. Thanks, PB.
Raymond P.

Offline Doc B.

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Re: Grounding terminal 21L
« Reply #3 on: November 05, 2018, 11:57:24 AM »
This question comes up occasionally across the spectrum of amp and preamp kits. The toothed lockwashers cut through any coating and create continuity 99.9% of the time.
Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline Raymond P.

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Re: Grounding terminal 21L
« Reply #4 on: November 05, 2018, 04:45:17 PM »
I got the transformers mounted along with the 6-lug terminal strips. Sure enough, the end terminals are connected through the bell cover. (In the case of the BeePre, the star lockwashers go underneath the bell, so I think the bolt heads are what cut through the paint when turned.)
Raymond P.