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Showing content with the highest reputation on 01/21/2022 in all areas

  1. Very little risk at all. You are expert in your field and know how the system functions. Lack of knowledge is dangerous.
    2 points
  2. Okay so I can't walk away for good... QUESTION: Am I at risk for working on electronic equipment? I am required to open up high voltage appliances, and in many cases, test them before I know what is wrong with them. Does this impose significant risk to my life?
    2 points
  3. My point was that depending on how the IEC is orientated, it could change how a person wired up the live and neutral. ie, if you said "pin closest to the fuse is live" and you did 99 that way and then some flunky installed the IEC upside down you may wire the neutral to the fuse without thinking. I did a quick search for pics on the web and they all look to have the earth pin at the bottom so my observation is probably crackpot anyway. I agree that if there is no earth connection, one would probably source two pin connectors for factory product. Lunchtime!
    1 point
  4. Thanks for posting that link. I have read Amir's reviews for some other audio gear and they have been reliably accurate for the reviews I have read. One thing that I have concluded from the methods Amir uses (and the results of the tests) is that there is a lot of discussion about how much difference there is between the results of the tests. There is very little mention that the audible difference is negligible (or nil for many people) between a SINAD (at 5 watts 4 ohms) of 113 (best of all gear tested) and SINAD of 78 which the site calls "FAIR." While accurate, this difference should not have much relevance when an audio enthusiast is comparing gear and making a purchasing decision. The test result is as misleading as the specs claimed by many manufacturers trying to make sales to people who have little or no opportunity to hear the gear and make a relevant comparison. Getting relevant data on audio gear is nearly as difficult as knowing who was responsible for killing JFK. This Carver site is a notable exception and the administrators and contributors here have my gratitude.
    1 point
  5. No doubt this type of boilerplate was just copy pasta from another owner's manual. It's very common to find errors in owner's manuals. After a few too many complaints I was rewarded with the final proofread of all the manuals at a company I worked for. As long as the amplifier doesn't fall in the bathtub (without a GFCI) I'm sure they are fine. The last time I checked there still hadn't been a safety notice/recall on the pinto or mustang fuel tank debacle. I'll be damned if I ever trust that company. Lucky dear old dad wasn't taken out by that thick film ignition module in his T-Bird.
    1 point
  6. Something else that they brought up at ASR was the fact that the Neutral side was fused rather than the live side. Interestingly, I noticed this; This is the reviewed unit from the ASR website. Notice that the earth pin in the picture is at the bottom. If you go to the Bob Carver website and look at the picture of the Crimson 275 back panel, you will see that the IEC orientation is opposite, with the earth pin at the top! https://www.bobcarvercorp.com/copy-of-crimson-raven This orientation may affect how the wires are soldered to the fuse and switch. One would have to open up the units to confirm how it is soldered. Maybe some units have the live fused and some may have the neutral fused. EDIT: the unit on the bob carver website is probably actually a picture drawing and not an actual unit so maybe some folks who actually have a unit could say which way the IEC is installed.
    1 point
  7. This may seem off topic but it points directly at safety issues. I'll get right to it>> In so many cases, I can think safety actually being the fault to begin with. Working outside, 'they' wanted us to wear safety goggles. You know, the ones that steamed up immediately, no matter the outside temp? Then there were the 3 layers of gloves for high voltage work. 1) cotton 2) rubber gloves over that 3) leather gloves over that! Go ahead, try to use your hands in a meaningful way to work now. The old high voltage testers. The gunsight method was preferred so that you might see the test light pop just as you touched the work being tested. ALL of these were inherently dangerous! BUT they satisfied the experts. That 3rd wire may or may NOT be needed for the application. >>>>>>>>>>>>>> "Ground is ground the world around" One of the biggest lies told to us.
    1 point
  8. And if the Crimson 275 had been built with a TWO prong IEC, would they still be complaining that it doesn't have a chassis ground?
    1 point
  9. The issue is there's a 3 prong receptacle on the amplifier and it specifically states in the owner's manual not to use a cheater plug, make sure to plug it into a 3 prong outlet for safety reasons. A kit amp for enthusiasts is one thing, a production model is a different animal. That's what the ruckus is about.
    1 point
  10. I agree with your EG thought process but unfortunately UL, CE and others disagree - and I bet the legal review of any issues would fall back to looking at those agency listings, electrical codes, etc. I'm not arguing for their thought process - I'm more interested in what Bob Carver Corporation is going to do, if anything, about the situation. I saw a note that said Bob agreed to pay shipping both ways to have anyone's amp re-wired to utilize a chassis ground at no charge but there isn't any mention of this on the Crimson 275 web page.
    1 point
  11. Okay fine. Then if the chassis is grounded and you touch a faulty power cord and get exposed to the hot with one hand, and you're grounded with the other hand, you could get fucked. EG is not automatic safety. In many ways it is far more dangerous.
    1 point
  12. Bob made a comment that I thought summed the situation well. ” I have built conventional designs of amplifiers, that test great by conventional test standards, and have avoided controversy with those, but to be honest, those designs are kind of boring.” Bob Carver.
    1 point
  13. Yeah, those idiots obviously don't understand grounding and why and where it is applied. I shake my head at stuff like that - have they looked at the two prong power cords on 99% of consumer electronics sold in the US? Unreal... EDIT - After making more time to read the thread they are also bringing up the true "safety" grounding aspect. As in if there is a wire break, a switch failure, etc. how the lack of insulation inside or the lack of a chassis ground can create a dangerous situation for the end user. From a CE or UL perspective this can be a liability issue. I am curious to see how it is addressed, if it is at all.
    1 point
  14. There's no rhyme or reason as to how they mount those outlets: prong on bottom, prong on top, I've got at least two pieces that have them sideways. If you're only going to use two prongs quit being so cheap and stick on a two prong connector or just hard wire it in there and then you can complain about no detachable power cord. Frank Van Alstine was funny, he said he finally put in a detachable power cord socket so you can buy your own fancy one and it can fall right out!
    0 points
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