- Who wants 1 million euros? - 6 Updates
- Variac question - 3 Updates
- Serious Tube Amp Questions - 3 Updates
| brix <matlab.user@gmx.com>: Nov 10 10:41AM +0100 I have to take these arbitrations. There is the figure the city and the referee judge of the organization. Who can help me? € 30,000,000 Turin (foot) € 18.000.000 Rome (penis) € 13,500,000 Milan (hand) € 2,800,000 Ravenna (hand) € 2,200,000 Rimini (hand) € 1,500,000 Siena (ax) € 800.000 Bari (foot) € 700,000 Verona (foot) € 650.000 Ferrara (hand) € 340,000 Ancona (foot) € 70.490.000 Total |
| Fox's Mercantile <jdangus@att.net>: Nov 10 06:53AM -0600 On 11/10/18 3:41 AM, brix wrote: > € 650.000 Ferrara (hand) > € 340,000 Ancona (foot) > € 70.490.000 Total Do I get paid for everyone of yours I remove? -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
| Tom Biasi <tombiasi@optonline.net>: Nov 10 09:49AM -0500 On 11/10/2018 7:53 AM, Fox's Mercantile wrote: >> € 340,000 Ancona (foot) >> € 70.490.000 Total > Do I get paid for everyone of yours I remove? I don't think you should take his brain Jeff. |
| brix <matlab.user@gmx.com>: Nov 10 03:57PM +0100 On 10/11/2018 15:49, Tom Biasi wrote: >>> € 70.490.000 Total >> Do I get paid for everyone of yours I remove? > I don't think you should take his brain Jeff. Jeff and Tom, do you help, please? |
| Fox's Mercantile <jdangus@att.net>: Nov 10 09:37AM -0600 On 11/10/18 8:49 AM, Tom Biasi wrote: >>> € 70.490.000 Total >> Do I get paid for everyone of yours I remove? > I don't think you should take his brain Jeff. It wasn't list as available. ;-) -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
| Fox's Mercantile <jdangus@att.net>: Nov 10 09:37AM -0600 On 11/10/18 8:57 AM, brix wrote: >>> Do I get paid for everyone of yours I remove? >> I don't think you should take his brain Jeff. > Jeff and Tom, do you help, please? This has nothing to do with electronic repair. So Nope, no help forthcoming. -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
| three_jeeps <jjhudak@gmail.com>: Nov 09 09:43AM -0800 On Thursday, November 8, 2018 at 7:08:03 PM UTC-5, Phil Allison wrote: > FYI: > The use of an RCD, ELCB or other earth leakage detector ( aka safety switch) on a workbench is a safety essential. > .... Phil I think the point in this thread is that one has to know what they are dealing with before employing an isolation transformer. I read the article. IMO, the article title is an attention getting and his point is that the isolation transformer presents a 'false sense of safety'. The assumption that most ppl will make is that one blindly needs to install an isolation xformer in all applications and it will keep you safe. There are limitations based on the circuits one is dealing with. The assertion to be safe one must "use of an RCD, ELCB or other earth leakage detector" is a general statement but also a bit misleading. RCDs are NOT recommended and ELCBs are essential. This article explains things quite well.. https://www.linkedin.com/pulse/what-difference-between-mcb-mccb-elcb-rccb-elcab-engineers The statement about live chassis 'only in TV of the 90's' is grossly incorrect. My father owned/operated a TV/Radio sales and service shop from early 50 through 2000. I grew up in the shop and serviced TVs and other electronic gear from the 60, 70, and 80s. I can attest that the live chassis was not only in the 90's. I've seen it in the 70s and 80's TVs. I've also seen it in electronic gear in the 2010s - e.g. soldering stations/hot air rework stations from China, as well as three voltage power supplies from China. Point is, one needs to be aware of the realities of the circuitry they are working on and dont blindly apply 'safety measures'...that doesn't mean to ignore them. It means to apply them but know what areas of 'safety' they are meant to protect. |
| tabbypurr@gmail.com: Nov 09 04:57PM -0800 On Friday, 9 November 2018 17:43:53 UTC, three_jeeps wrote: > I think the point in this thread is that one has to know what they are dealing with before employing an isolation transformer. I read the article. IMO, the article title is an attention getting and his point is that the isolation transformer presents a 'false sense of safety'. The assumption that most ppl will make is that one blindly needs to install an isolation xformer in all applications and it will keep you safe. There are limitations based on the circuits one is dealing with. To remain safe when working on live equipment one needs to understand what one is dealing with whatever safety systems are in use. Isos have their limitations of course, so do all safety methods. > The assertion to be safe one must "use of an RCD, ELCB or other earth leakage detector" is a general statement but also a bit misleading. RCDs are NOT recommended and ELCBs are essential. Woah. Voltage operated ELCBs are obsolete, a known hazard and offer no protection whatever against shock when working on a live chassis appliance. They only protect against the earth system becoming live as a result of a high current fault (not via a human) that would otherwise raise the earth system above 50v. That's all they do. They were obsolete in the 1980s. Current operated ELCBs _are_ RCDs. > This article explains things quite well.. > https://www.linkedin.com/pulse/what-difference-between-mcb-mccb-elcb-rccb-elcab-engineers It's yet another article with both correct points and some confusion. > The statement about live chassis 'only in TV of the 90's' is grossly incorrect. > My father owned/operated a TV/Radio sales and service shop from early 50 through 2000. I grew up in the shop and serviced TVs and other electronic gear from the 60, 70, and 80s. I can attest that the live chassis was not only in the 90's. I've seen it in the 70s and 80's TVs. I've also seen it in electronic gear in the 2010s - e.g. soldering stations/hot air rework stations from China, as well as three voltage power supplies from China. Unless I'm mistaken I don't think anyone said live chassis kit only existed from the 90s. I have had live chassis stuff from post-2000, 90s, 80s, 70s, 60s, 50s, 40s, 30s, 20s and one item that might have been from the 10s or 20s. By the time you go that far back 'live chassis' becomes somewhat meaningless in that it was normal to have live bits all hanging out. > Point is, one needs to be aware of the realities of the circuitry they are working on and dont blindly apply 'safety measures'...that doesn't mean to ignore them. It means to apply them but know what areas of 'safety' they are meant to protect. that of course is vital when working on live equipment. Anyone that does so without understanding what they're doing or gets careless is in trouble. In about of 99.2% of those cases a shock awakes them to the need to be sensible. Mortality is somewhere roughly in the region of 1 per 600 shocks. There is NO safety system that can protect people against that. RCDs offer zero protection against shock from transformer derived B+, don't protect against L-N shocks and don't always work on L-E shocks. ELCBs offer no shock protection at all from live working hazards. Isos offer limited protection. Never touching the equipment with both hands offers limited protection. An earth-free workzone offers limited protection, etc etc. Sometimes you just need to know what you're doing or not do it. NT |
| Phil Allison <pallison49@gmail.com>: Nov 09 05:32PM -0800 three_jeeps wrote: > > The use of an RCD, ELCB or other earth leakage detector > ( aka safety switch) on a workbench is a safety essential. > I think the point in this thread is that one has to know what they are dealing with before employing an isolation transformer. ** Which practically counts out the servicing equipment with unknown faults. > I read the article. ** Good for you. IMO, the article title is an attention getting and his point is that the isolation transformer presents a 'false sense of safety'. The assumption that most ppl will make is that one blindly needs to install an isolation xformer in all applications and it will keep you safe. There are limitations based on the circuits one is dealing with. > The assertion to be safe one must "use of an RCD, ELCB or other earth leakage detector" is a general statement but also a bit misleading. RCDs are NOT recommended and ELCBs are essential. ** The use of RCDs is highly recommended in the article *YOU* cited !!!! QUOTE: " RCDs are an extremely effective form of shock protection " ------------------------------------------------------------ > https://www.linkedin.com/pulse/what-difference-between-mcb-mccb-elcb-rccb-elcab-engineers > The statement about live chassis 'only in TV of the 90's' is grossly > incorrect. ** Good - cos no-one here actually said that. Do you have a reading disability ?? Never mind, NG postings are notorious for being confusing & difficult to follow. .... Phil |
| etpm@whidbey.com: Nov 09 11:02AM -0800 On Fri, 2 Nov 2018 04:47:06 -0700 (PDT), "pfjw@aol.com" >Look for a reliable tube amp from a local (US) source such that if you need help/advice/service, it would be available. Bob Latino at VTA is every bit of that. And Dynakit Parts is another. >Peter Wieck >Melrose Park, PA Greetings Peter, I took your suggestion and looked at the links provided. I spoke with my son about what I wanted to do and he mentioned that he sees tube equipment fairly regularly at thrift stores and estate sales and the like. So he is gonna look for some used equipment that can be rebuilt. Looking at YouTube I found several videos about fixing old amps, how replacing certain caps is really important in old equipment. How you don't even power them up before changing out all suspect caps. But since it's all pretty open inside and point to point it looks like something I will have no problems with. Since it seems like most of the small amps will be low wattage devices sensitive speakers will be needed. I think I need speakers rated at 90 dB or better. I have no idea what used speakers to buy if I come across any, but maybe a little research will turn up some specs on some of the older speakers. New speakers are probably what I'll end up with. Tubes are a whole 'nuther thing. It looks like there is a lot to learn about tubes. How specific types work, which can be substituted for which, etc. Which are best in new production because NOS tubes may not be any good. And are often more expensive anyway. Any more advice and suggestions are welcome. Thanks, Eric |
| Ralph Mowery <rmowery28146@earthlink.net>: Nov 09 06:05PM -0500 In article <uelbudlvmofh3698jso3lpabh65q331via@4ax.com>, etpm@whidbey.com says... > for which, etc. Which are best in new production because NOS tubes may > not be any good. And are often more expensive anyway. > Any more advice and suggestions are welcome. Most NOS tubes I have dealt with seem to be fine. I have some tubes that are very old and no problem with them. Many can be bought for a few dollars if you look around. I have a ham amplifier that has the origional tubes in it from aound 1975 or older. They still put out the rated power. |
| tabbypurr@gmail.com: Nov 09 05:06PM -0800 On Friday, 9 November 2018 23:05:29 UTC, Ralph Mowery wrote: > few dollars if you look around. > I have a ham amplifier that has the origional tubes in it from aound > 1975 or older. They still put out the rated power. I have 1930s tubes still in occasional service. If buying old, there are plenty of crap tube amps to choose from. And some good ones. And some major winners. As for power, speakers have gotten less sensitive for good reasons. If you're sure you need a ton of volume, look for (1960s) domestic speakers in big cabinets & try tem out. Don't touch large pre-war ex-cinema stuff, fidelity still had a long way to go. If you buy modern, look for large woofers & cabinets, horns for mid-range. I'd also look for piezo tweeters but not everyone likes them. Those 4 features are as efficient as they get (with reasonable equipment). NT |
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