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| Test Equipment Anonymous (TEA) group therapy thread |
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| mnementh:
--- Quote from: Zenith on July 17, 2022, 05:20:11 pm --- --- Quote from: mnementh on July 17, 2022, 04:52:21 pm ---Having done the flea market trade myself, I know from experience that most flea markets who are serious about the trade (like they are in Flori-duh, for example) have such rules in place. Enforcement... ehhh... that seems to depend on the specific venue and how well or poorly they're doing ATM. ;) --- End quote --- It's a different scene. At radio rallies in the UK there are a few people trading in new items, or components. A few give the impression of dealing in used gear, but not as a major source of their income. A lot of it is people having clear outs and happy to make a few quid, or silent key sales. It's far less "structured". --- End quote --- Yeah, I know the scene, at least as it plays out over here. One of the flea markets I did regular trade at hosted a couple small HAM swap meets a few times a season. My first IRL experience with the "ratchet-jawin' hoboes" phenomenon we make fun of in here. :-DD Also the source of a few TE scores which, for good or evil, helped get me started down this road. ??? I used to do both; buy and sell. I'd arrive with the produce vendors and set up all but my most theivable bits of consumer electronics, then go make the rounds as the yard-sale people started filtering in and shop for stock. Then I'd go back to my stall and sell while triaging the day's acquisitions. Hard work, but on the whole it were a helluva lot of fun. ;) mnem :blah: |
| AVGresponding:
--- Quote from: Zenith on July 17, 2022, 05:46:13 pm --- --- Quote from: Cerebus on July 17, 2022, 05:32:26 pm --- Wrong in almost every important respect. It is unlawful for someone to park on your driveway(tort), it is not unlawful to have said vehicle moved on private property, but becomes illegal the moment on is on public property unless one is properly licensed to do so or is a bailiff acting under court order, or anyone acting under the directions of a police constable or traffic warden (RTA), ............... --- End quote --- There's the law and what you can in theory do, such as suing someone for damages for parking on your driveway, and there's the practicality of doing this in a timely way and gaining just redress. There was a case a few years back of someone who parked a car on a private driveway, in some port, I think it was Dover. They had permission to park on the driveway at an address in the street, to avoid the ferry port parking charges. The problem was they parked at the wrong address, causing the householder immense problems, as parking was tight in the street. I'm not quite sure what happened, but it didn't seem a simple matter of calling the police and having them remove the car. --- End quote --- I think if it's on private land it becomes a civil law matter rather than criminal law, so the police wouldn't be interested. Not that they are interested in anything these days, unless it's in their targets. Or if you're lucky and live somewhere relatively quiet like I do, they might come out on a trivial matter out of sheer boredom. |
| Zenith:
--- Quote from: bd139 on July 17, 2022, 05:44:14 pm --- Main tools used were a microfibre cloth and some kitchen spray :-DD --- End quote --- Change your avatar to Mr Sheen. |
| grizewald:
Datron 1071, penultimate installment Once I was able to see and probe the PSU circuitry, some worn out electrolytics were swiftly identified, along with a diode bridge which had suffered badly from the excess current it had been asked to provide. There were also a bunch of tants which were replaced without testing as some were grossly under-dimensioned for the voltages they were dealing with - a 47µF 6.3V tantalum capacitor on the main 5V rail being a prime example. The 350V 10µF capacitor in the centre of the picture had no measurable capacitance at all if I remember correctly! My eye was also drawn to the horrors of the main 5V rail's LM309K voltage regulator. Quite a few 10xx series meters suffer from this problem. It would seem that Datron used an acid flux when they were soldering the wires to the TO-3 packaged regulator and fitting it to the heatsink. The acid was not washed off and once the rubber insulation tubes were added over the wires, the acid could sit undisturbed to do its evil work. This not only caused the rubber to appear mouldy as it does here, it also slowly ate through the regulator's leads and even migrated along the package's leads to the internals of the regulator. As you can see, it has even started eating into the anodised aluminium where it seems to have flowed from the rubber tubing onto the heatsink. Removing the heatsink to replace the regulator and wiring is made even more entertaining by the fact that there's also a transistor on the heatsink below the regulator which is soldered directly to the PCB. The transistor is bolted to the heatsink with a nylon screw and nut. As you can imagine, after some 45 years of baking on the heatsink, the nylon was good and crunchy! As was the hardware on the heatsink right next to it. In the end, I ended up replacing the majority of the PSU components. It may not have been strictly necessary for some of them, but the end result was ripple free and accurate rails and a warm, pleasant feeling from knowing that I will never have to take this part of the Datron apart ever again! Next up, the final installment and a classic factory induced problem... |
| mnementh:
--- Quote from: Vince on July 17, 2022, 05:29:51 pm --- --- Quote from: mnementh on July 17, 2022, 05:00:17 pm ---...You have entirely too much "free" time on your hands. I think you should drag out one or two of your scopes and revisit them... maybe post some hollow-state pr0n in the thread. ;) mnem :popcorn: --- End quote --- I will get back to my regular boat anchor activities as soon as schedule permits. Maybe in 3 months. For now, need to finish sorting and organizing my components and misc H/W, almost done. Then I need to resume work on my Rochar Nixie DVM because it's in a millions bits all over the bench so I need to finish it, assuming I am competent enough to actually managed that, while it's still fresh in my mind, and before I lose parts and/or forget how to put them back together... But if I can get those first few things I listed, done this year, that would be cool. --- End quote --- Ahhh, I had forgotten that you did in fact already have a smallish on your bench. So what specifically is the holdup on that; I know funds are short? I've faced that dilemma myself... though I'll admit, the need to use my bench usually results in me eventually* figuring out a method to put said project "away in a banker box" to protect it from my own clumsy self. I've learned the hard way that at least with me, every day a project spends dismantled on my bench increases (seemingly exponentially) the likelihood of me dropping something on it and breaking it beyond salvation, or losing a handful of mission-critical screws or components while I'm occupied with something else. I've gotten in the habit of taking copious pics on my phone so they're handy when I want to resume; also of leaving myself lots of notes because I am a very forgetful dwagon. :-[ mnem *I refuse to admit just how eventually that sometimes is... |
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