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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: My point was apparently missed posted by Ron Oehlert on April 27, 2007 at 09:28:52:
and I am seeing some serious misinformation in some other posts.As I see it your main point is that the signal circuit could be entirely floating. Given that the (hot) signal is from the plate of a tube (usually) and that plate voltage is rectified AC with the filter cap's negative side going to normal electrical ground it seems to me signal is already (AC) referenced to ground. Given that the return path for the signal is the tube's cathode and said cathode is referenced to the same ground the filter caps are, which is normal electrical ground, you are still involving electrical ground. Even if you don't have a 3-wire cord the neutral wire is referenced to normal electrical ground and at the least there is a cap between neutral and chassis if the neutral isn't simply bonded to the chassis.
About the only way you are truly getting away from normal electrical ground is if you transformer couple. Even balanced IO's involve electrical ground.
BTW, irregardless isn't a word. American electrical code requires the chassis to ground bonding be done with a minimum of a #8 screw and never soldered. And a separately derived ground via running to a water pipe is highly illegal and potentially very dangerous. Okay, I have had my rant for the day and nothing personal gents :)
Russ
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Follow Ups
- I guess I am missing your point too - Russ57 09:54:24 04/27/07 (8)
- Re: I guess I am missing your point too - Dave Cigna 17:03:43 04/27/07 (0)
- Re: I guess I am missing your point too - Ron Oehlert 12:51:24 04/27/07 (3)
- In what way is electrical ground different than earth ground? - Russ57 13:36:08 04/27/07 (2)
- Re: In what way is electrical ground different than earth ground? - Ron Oehlert 15:15:01 04/27/07 (1)
- DC amps still need AC grounding. - cheap-Jack 09:28:06 04/28/07 (0)
- Re: I guess I am missing your point too - danlaudionut 10:57:46 04/27/07 (2)
- I don't make the codes - Russ57 12:03:46 04/27/07 (1)
- Re: I don't make the codes - danlaudionut 15:21:22 04/27/07 (0)
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