- Cheap and cheerful bench power supply - 6 Updates
- Network cable - 4 Updates
- Icepower 50ASX2 - 3 Updates
| Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au>: Jun 15 05:56AM +1000 On 14/06/2015 9:43 PM, Phil Allison wrote: > plus a couple of 1.5V cells. > Gives you a dual tracking supply of 0 to +60V and -60V with single knob control and heaps of current available. > Hint: you switch the amp to "bridge" first. **Nice idea, except I require variable current limiting as well. I wanted to avoid a DIY exercise. In any case, I've pretty much decided that a 30-0-30 @ 5A supply will do for the present time. 200 Bucks from Rockby. -- Trevor Wilson www.rageaudio.com.au --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
| "Gareth Magennis" <sound.service@btconnect.com>: Jun 14 10:32PM +0100 "Phil Allison" wrote in message news:bd937183-cf4f-42fc-974b-49b756ed65a9@googlegroups.com... Trevor Wilson wrote: > 0-5 Amps > Linear rather than SMPS > 230/240VAC ** All you need is one of these: http://product-images.highwire.com/5569873/7432-6.jpg plus a couple of 1.5V cells. Gives you a dual tracking supply of 0 to +60V and -60V with single knob control and heaps of current available. Hint: you switch the amp to "bridge" first. I had a very painful learning experience with one of these amps, in my very early days of repairing stuff. I'd repaired it, tested fine on the bench. Then reassembled it, stupidly without re-testing it. Turns out I'd used a screw somewhere near the mains switch that was slightly too long. Caused a short, caused both outputs to become DC. Gave it back to the customer, he connected it to a pair of these: http://spurwinkproductions.com/Edit%20A%20pictures/813C_1.jpg Fried all 4 cones. Since then, nothing ever leaves my workshop without a final test, fully assembled, ready to go. Gareth. |
| Phil Allison <pallison49@gmail.com>: Jun 14 08:03PM -0700 Gareth Magennis wrote: > Since then, nothing ever leaves my workshop without a final test, fully > assembled, ready to go. ** Had a customer once who decided it was perfectly OK to bring just the chassis from his combo amp in for service, with the valves removed and packed separately. He wanted it back that way too. He was not a customer for long. Final testing is when you often find new, unreported faults and any errors made during servicing. ... Phil |
| Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au>: Jun 15 01:14PM +1000 On 15/06/2015 1:03 PM, Phil Allison wrote: > ** Had a customer once who decided it was perfectly OK to bring just the chassis from his combo amp in for service, with the valves removed and packed separately. He wanted it back that way too. > He was not a customer for long. > Final testing is when you often find new, unreported faults and any errors made during servicing. **Indeed. It is crucial to any decent service job. For any decent product which hits my bench, it is subject to significant under-load testing, to reasonable operating temps, plus basic performance tests to verify operation. For some amps, that can mean several hours of testing. Particularly those with several tens of kg of heat sinking. Even the cheapest, crappiest amp that lands on my bench is tested for basic performance before leaving. Anything less can be a costly mistake. Nothing worse than a customer who brings in a box full of parts, asking for me to fix it. -- Trevor Wilson www.rageaudio.com.au --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
| gregz <zekor@comcast.net>: Jun 15 04:33AM > Hint: you switch the amp to "bridge" first. > ... Phil Got to remember that.. Greg |
| Phil Allison <pallison49@gmail.com>: Jun 14 11:22PM -0700 GS wrote: > > Hint: you switch the amp to "bridge" first. > Got to remember that.. ** You could use the same idea with most dual channel power amps, long as you restore full gain at DC by removing input and feedback loop electros. ... Phil |
| "dusty " <dusty®.net>: Jun 14 07:39PM -0500 How close to power lines in the attic can network cable be without causing interference. -- |
| M Philbrook <jamie_ka1lpa@charter.net>: Jun 14 09:15PM -0400 In article <B7qdnV4VKItXg-PInZ2dnUU7-XmdnZ2d@giganews.com>, "dusty " says... > How close to power lines in the attic can network cable be without causing interference. You need to worry more about lightning strikes.. Keep the wire far enough away so that if your power likes do get hit, the strike can not make it over to your network cables. That's not to say that your devices connected to the grid won't get hit so what ever :) At least 6 inches or more I would say for that, as for basic line noise, you can get close to the wores. Network cables are twisted pairs so they are design to reduce external noise to a degree. Jamie |
| whit3rd <whit3rd@gmail.com>: Jun 14 07:24PM -0700 On Sunday, June 14, 2015 at 5:39:41 PM UTC-7, dusty wrote: > How close to power lines in the attic can network cable be without causing interference. Fire safety usually dictates circa 1 foot separation (that's because of lightning, not for normal operation). They work fine if you bundle AC and data wiring all together with a velcro strap under your desk, of course, but wires in the attic might be regarded as 'installed' in the building, and that's the recommended separation of low-voltage and power wiring runs, if there's no conduit. |
| Jeff Liebermann <jeffl@cruzio.com>: Jun 14 09:38PM -0700 On Sun, 14 Jun 2015 19:39:36 -0500, "dusty " <dustyŽ.net> wrote: >How close to power lines in the attic can network cable be without causing interference. I vaguely recall that NEC requires 2" separation between signal and power cables for safety. I'm not sure of the 2" and am too lazy to look it up. If you're worried about coupling between the 60Hz power lines and the CAT5e network cable, everything depends on the distance that they run in parallel. If it's fairly short, or the cables simply cross, there's no cross coupling. However, if you're running something like 50ft next to each other, expect problems. In theory, ethernet is immune to low frequency (60 Hz) interference. In reality, the power lines contain substantial amounts of higher frequency noise and junk that MIGHT couple to the ethernet cable. The common mode rejection of the twisted ethernet wires dramatically reduces coupling, but if sufficiently strong, you may have problems. For example, if you're wiring a factory full of sewing machine motors, you should certainly keep the network cables away from the power lines as the variable frequencies, high power levels, and high noise levels from these motors can cause problems. You really should ask this question in one of the wiring newsgroups, such as comp.dcom.cabling. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
| amdx <nojunk@knology.net>: Jun 14 11:56AM -0500 > Aha, I rememeber, you're the guy with 37 freezers and the wires melting. I have 12 freezers, and I had wires to an outlet overheat, the wiring was a pass thru the outlet to other oulets that I had two freezers on. It was obvious the connections made to that box (after 25 years) had increased resistance. > Now, how do you get into this shrimp gig ? My wife started selling for about 3 hours in the afternoon after her regular job. Then I started selling in the morning before my job. After a couple of years she said, " why don't you quit your job and do this full time", I responded, I'll quit my job if you quit your job. We both did, and have been selling shrimp for 15 years. It has worked out very well for us, but I'm tired of 10+ hour days, 362 day years, no vacations. I do get days off but with two of us running the business, there is always something to do. Also, how did that oil spill affect you? It had a psychological effect on the tourist trade, which caused a drop in my business. Were you the de facto source for petroleum free shrimp back then? We didn't have any effect from oil this far East (P.C.FL.) Some people weren't convinced though. they told us the price was going to triple and all this shit. Prices did rise, but they didn't even double. Something that prices just now seem to be recovering from is Early Mortality Syndrome (EMS) it is a disease of farm raised shrimp. Even though I don't sell any farm raised shrimp, they are a large part of the overall market. The shrimp in ponds were dying, this caused low production, prices rose, I was paying 25% to 40% more for my wild caught shrimp. Prices are falling back down now. Here's a little bit about the EMS cause. > https://www.shrimpnews.com/FreeReportsFolder/NewsReportsFolder/USAarizonaLightnerFindsCauseOfEMS.html Mikek |
| jurb6006@gmail.com: Jun 14 04:24PM -0700 You must hae missed the hype from the liberqls and Earthies. We were all supposed to get cancer from eating shrmp. I like shrimp, breded ofr floured and deepfried. And I don't use that red sauce, I use tartar sauce, but then it is my s[eciale recipe, not what people thing it is.' More recently I have had it fried in butter and then tossed in with pasta and some other shit. I want to expound on that in my own direction. I envision something like a thinner version of alfredo sauce, but with the flavor. And of course the shrimp go in as, get tossed in and then it is time to eat NOW. We hae ben looking for some "pasta shit" to make with things. Like if you make pork chops, what to have with it ? We are tired of potatoes, and now also tired of those pasta shit in the store. Knorr. Not that they're bad or good, they are neither. We are just fucking sick of them. So if I boil some skinny noodles, and make a roux in a frypan and add some cheese and some other shit, I can make much better than those bags or boxes of pasta shit it the store. If I took that shrimp when it is jusr thawing, and fried it HARD in bacon grease, just enough so it is done, and then dump it into this pasta dish, I might be on to someting. ?I usd to sorta likw Gordon Ramsay, but now I have seen some of his other shit. Cool that he bitches about uncooked food, bugs and all that sit. But I finally just went Google "gordon ramsay recipe" and the video it showed, fact is I doubt I would have eaten any of it. Not sure. Wierd shit. |
| amdx <nojunk@knology.net>: Jun 14 07:53PM -0500 > I like shrimp, breded ofr floured and deepfried. And I don't use that red sauce, I use tartar sauce, but then it is my s[eciale recipe, not what people thing it is.' > More recently I have had it fried in butter and then tossed in with pasta and some other shit. I want to expound on that in my own direction. I envision something like a thinner version of alfredo sauce, but with the flavor. And of course the shrimp go in as, get tossed in and then it is time to eat NOW. > We hae ben looking for some "pasta shit" to make with things. Like if you make pork chops, what to have with it ? Well it just so happens, I just finished one of my favorite meals. Grilled marinated pork chops, broken rice, and over easy eggs. Rice goes on the plate, ground hot peppers are put on the rice along with diced green onions cooked in a little olive oil. The pork chops are cut into cubes and sprinkled on the rice. Then the special sauce, made with fish sauce, lemon juice, water and sugar. here's first recipe I googled, I'm sure there are others. > http://www.hungryhuy.com/vietnamese-dipping-fish-sauce-recipe-nuoc-cham-nuoc-mam-cham/ The sauce is drizzled on the rice, then the eggs are put on top. When you break the yoke into the rice with fish sauce, it is oh so good! I don't no what she marinates the pork chops in, I suspect some hoisin sauce, oyster sauce, garlic and... We grow Thai hot peppers, she grinds them with a little vinegar and stores it in peanut butter jars. Used daily. :-) Mikek |
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