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In Reply to: RE: Another DIY project (AC Filter) posted by pixelphoto on September 02, 2015 at 19:31:50
Did some searching here and found the OP referenced post in which Al Sekela suggests Cat 5 wire in an R-C parallel filter. Yes, he did say that but that was for a SPEAKER R-C array, NOT for AC use! So voltage rating was not an issue at all.
Folks, please do not confuse the two types of filters. They sound alike in terms of being a parallel filtering scheme, but they are not at all alike in terms of safety issues, placement, etc.!!!!
Follow Ups:
bartc:
"Did some searching here and found the OP referenced post in which Al Sekela suggests Cat 5 wire in an R-C parallel filter. Yes, he did say that but that was for a SPEAKER R-C array, NOT for AC use! So voltage rating was not an issue at all.Folks, please do not confuse the two types of filters. They sound alike in terms of being a parallel filtering scheme, but they are not at all alike in terms of safety issues, placement, etc.!!!!"
The above mentioned wire has been replaced with a proper high quality hookup wire.
Sorry bartc my STUPID.
pixelphoto (Marvin)
Edits: 09/10/15
An easy to understand mistake, but glad you got it fixed for safety.
Al's big worry about posting any of this was that someone might inadvertently do something that would end in tragedy - at least with any of his AC tweaks.
You should enjoy this baby and more the merrier around the house.
BTW, my original model for safety was housed in a PVC pipe fitting filled with quartz sand and capped. Didn't want to chance anything with AC. So far I've never had a problem with any of these devices, but I'm sure UL would positively faint if they looked at most of Tweakers twiddling!
I house mine for a good reason: I don't want the house cleaner or my wife or especially my dog to grab anything with exposed wiring.
Enough said. Now enjoy yourself.
No worries, pixelphoto. It's the kind of mistake that many folks can easily do when interpreting online information.
Discussing the dangers of AC delivery emphasizes the issue when discussed in a public forum like Audio Asylum.
Cheers, Duster
I wonder if you could get a high quality triple insulated magnet wire situated into a workable configuration. I can only imagine how fun it would be to try and get this idea past the UL inspector....they don't appreciate solid core chassis wiring as I recall but maybe you could use a large enough gauge so it is rigid and self supporting so it is hoverred in the middle of the air void inside the chassis. UL probably wouldn't appreciate the thought of there being any chafing of the wire by anything if there were vibrations. Though, from a signal integrity perspective situating it far from anything other than perfect air dielectric as possible would be best.
Ugly, the wire I replaced the cat5 teflon wire with is Neotech hookup wire, up-occ copper solid core 18ga, 105ºC, 600v. I'll also follow the suggestion made by madisonears (thank you) and add a second run per each leg. Also there is plenty of clearance around the wire connections which are also covered with clear silicone which is also low volatile and high heat resistant. And I'm not using it to embed any part of the filter. Once cured there is no danger of fumes. And it's not plugged into a 20A circuit nor will it be. As for vibrations shaking anything loose and causing a catastrophic disaster, I don't believe it would happen; everything is solidly placed.
I wonder if anyone who built the very same AC filter years before me has had such a disaster?
Thanks for the advise and your concerns ugly.
pixelphoto (Marvin)
Sounds like a solid plan. Doubled up 18gauge, with the 600V rating will be sufficient without question.
I must admit, throughout my whole adult life, barely a week goes by without attending the funeral of a loved on who was fried by a small household appliance.
WTF. 18awg wire will take 83 amps for 10 seconds or 250amps for 1 sec. Enough to trip your breaker, no?
Your big plan is to run to the breaker box when faults start occurring?? You're one of those guys, eh? I suppose you have a fire extinguisher and a defibrillator on hand too. lol Good luck with that.
So my advice was on target except for believing that perhaps Al said something that he didn't actually say.
I don't get paid enough to go through this kind of grief.
OK < so how about we double your salary here, Duster?
And holiday pay plus overtime.
~D
Wherever you go there you are.
nt
Thanks guys, and I am enjoying it!
Happy ears to ya,
pixelphoto (Marvin)
Excellent...
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