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| Test Equipment Anonymous (TEA) group therapy thread |
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| bd139:
Some TE content for a change. Checking out these 0.01% resistor pulls while waiting for a yum update run. So far so good! |
| Specmaster:
--- Quote from: Cerebus on July 06, 2022, 10:17:36 am --- --- Quote from: Specmaster on July 06, 2022, 08:44:10 am --- --- Quote from: tggzzz on July 06, 2022, 08:28:25 am --- --- Quote from: bd139 on July 06, 2022, 06:46:00 am ---Yeah there are some recent advances which pretty much make the paper maps a backup option only in the UK. It has got to the point where even on the mountain leader courses it’s secondary navigation only. The OSMaps app is a fine example. You have vector, 25k and 50k layers, full offline support, precise positioning and backtracking. Importantly it’s far more up to date than paper maps, particularly in areas with coastal erosion which change very rapidly. This all fits in a little box that lasts all day, is waterproof and takes photos too and works in the dark without having to shoot your adjusted eyes with a torch. And it syncs with the compass on your wrist to give you absolute bearings for each leg. Of course I have backup nav. I usually carry an eTrex 10 for backtracking and GPX plotting and paper map in bag. ... I’ll take the phone any day! It’s much better. --- End quote --- Yes, but in the UK it isn't illegal to sit in a stationary car and read a paper map. Touch a phone to do that and you've committed an offence which can get your driving licence revoked. Yes, I know it is more nuanced than that. The whole topic is subject for creative misinterpretation by drivers and the police :( Try to choose an alternative route on a satnav, and it is nearly impossible. The best route is what the manufacturer in their "wisdom" decides is the best route. Plenty of scope for arguments with daughter there :) --- End quote --- Even using a satnav unless it is built into the car can land you in trouble, clearly these new laws have been written by an idiot who has zero idea of what they are doing. What harm are you doing if you are stationary (not in a traffic jam, but parked at road side), your not currently driving so no danger to others. I expect the next thing will be banning drivers from talking to passengers FFS. --- End quote --- Wrong, on many points. You can't use a hand-held phone or other device while driving. You can use one when parked at the side of the road. --- Quote ---Exceptions You can use a device held in your hand if: * you need to call 999 or 112 in an emergency and it’s unsafe or impractical to stop * you’re safely parked * you’re making a contactless payment in a vehicle that is not moving, for example at a drive-through restaurant * you’re using the device to park your vehicle remotely Using devices hands-free You can use devices with hands-free access, as long as you do not hold them at any time during usage. Hands-free access means using, for example: * a Bluetooth headset * voice command * a dashboard holder or mat * a windscreen mount * a built-in sat nav The device must not block your view of the road and traffic ahead. --- End quote --- Source: https://www.gov.uk/using-mobile-phones-when-driving-the-law So it's simple. Hold it in your hand while driving and you're nicked, and should be. Pull over safely, to a situation where you don't need to concentrate on or react to other traffic and you're golden. Common sense, not "laws have been written by an idiot who has zero idea of what they are doing.". --- End quote --- I got that info from a link in a news report to the new rules, and it specifically stated that to use any handheld device, phone or satnav, tablet, you must be parked up and not have the ignition on, other words' engine off and in the case of sensible cars, ignition keys removed from the ignition switch. So how does that work in keyless cars when you have to do is press the start button and ignition is on? I remember a few years back that I got pulled over, on an urban clearway mind you, by a police car that had been following me and he suspected me of holding a phone to my ear. Imagine how stupid the officer felt when he saw that I was indeed on the phone, hands free through the car stereo, phone on a dash mount and that I was scratching an itch on my ear at the time :-DD |
| Specmaster:
--- Quote from: Vince on July 06, 2022, 10:02:42 am --- --- Quote from: AVGresponding on July 06, 2022, 08:17:09 am --- --- Quote from: Vince on July 05, 2022, 10:31:12 pm ---TV REPAIR I guess of course the most likely suspect is the MOSFET. So I could just remove it, should be easy, and stick it in my superb, very helpful 5 Euros Chinese component tester... I am so happy I bought this horrible thing, one of the best investments in the lab 8) Stay tuned !!! :-DD --- End quote --- Did you check those MOSFETs yet? --- End quote --- Nope, I only just woke up, the microwave oven just rang the bell to inform that my bowl of hot chocolate is warm. Yes I know it's 12, but hey I can't go to bed so late and wake up at 5AM can I ! ;D Being unemployed has some good sides to it.... I will miss that. :-DD I will have a look at that TV later today. I have other stuff that need my attention first. In the process of fitting plinths in the bedroom. I cut all the bits yesterday, now need to glue them to the wall, then acrylic to hide the gaps and misery, then two coats of paint... I need t have it all finished and presentable by Saturday, in time for a family visit on Sunday. Will work on the TV while the glue will be setting. --- Quote from: AVGresponding --- Interesting to see that the two are from different batches/manufacturers, and also to note that the left-hand one appears to have far less heatsink compound between it and the heatsink. --- End quote --- Well it's chinese crap, I guess we should be happy there is heat sink to begin with, and compound is just luxury ! We got lucky to have some at all here, can't complain ! >:D They are from the same manufacturer though , I guess ? I mean the "KF" prefix designates the manufacturer, it's " KEC ". The 3 digits bottom right is the lot number according to the datasheet, and they there following one another, 837 and 838. I agree that the font used is different though, between the two... could the manufacturer have allowed other manufacturers to use their "KF" prefix ?! Under license maybe, I don't know... maybe you are right and the different font is indicative of that... But having two lot numbers that follow each other, if they were from a different manufacturer, would be really a hell of coincidence... So I would guess they are from the same manufacturer, but they decided to change the font starting with batch 838 ! ;D They are 500V 5A 1.4ohm, with a body diode inside. What I don't understand, had never seen before, it that there is more that just the body diode. Look at the datasheet attached below... the symbol they give shows what looks like a DIAC between the Gate and the Source pins ?! :-// They don't talk about it in the text, strange... If I don't know what that do and how important it is, I might cause damage to teh board if I replace that MOSFET with another one that does not have this DIAC in it... :-BROKE EDIT : somehow, my end at least, the forum shows a picture thumbnail below for the PDF datasheet I attached... strange. But I swear it's not a picture, just click on it and you will get the datasheet not a picture... --- End quote --- I think that maybe you have forgotten the golden rule about when attaching anything, photo etc to a post, always ignore the first presented position and click on the more tab and use the second one, the first has a glitch that does this sort of thing from time to time. |
| med6753:
Continuing from yesterday. After changing Q122 and Q142 Channel 1 of this Type 1A1 required a complete calibration. Everything fell into place easily and there were no issues. On to Channel 2. At the 5mV vertical setting the 100kHZ signal applied as per the manual displayed peaking as shown in the first pix. It took considerable tweaking of trim caps to finally get it looking good as in pix 2. All the gremlins have been excised from this plug-in. Next on the project list is PSU re-cap of a 465B. The caps were supposed to arrive today but UPS dropped the ball and they will arrive tomorrow. |
| bd139:
Oh don't. I'm probably going to have to do that 465B at some point. It's working fine though at the moment bar that popped IC so I'm not going to fix it until it breaks now. BTW good job on the 1A1 |
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