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Test Equipment Anonymous (TEA) group therapy thread

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Specmaster:

--- Quote from: med6753 on July 05, 2022, 11:16:18 pm ---Let's see....am I in the right thread?  :-DD

Anyway, starting looking at this FUBAR'ed Type 1A1 plug-in. On the lower vertical settings (20mV, 10mV, 5mV) ranges there is considerable noise on the channel 1 trace. And the noise is still present when the input is set to GND position.



First suspects are FET's Q122 and Q142. Located on this little pre-amp board. I have spares from a parts Type 1A1. Changed them out and it took care of the excess noise. However, now the DC balance, gain, compensation for channel 1 are completely out the window and I'll have to re-calibrate Channel 1.





Once Channel 1 is re-calibrated then on to Channel 2. On the lower vertical settings the high frequency compensation is peaking and can't be adjusted out.

--- End quote ---
Cool, you're back I see, I thought you'd huffed and puffed and went back to your vacation again  :-DD :-DD

tggzzz:

--- Quote from: mansaxel on July 06, 2022, 05:09:07 am ---
--- Quote from: tggzzz on July 05, 2022, 10:17:44 pm ---
--- Quote from: mansaxel on July 05, 2022, 07:53:24 pm ---
--- Quote from: tggzzz on July 05, 2022, 05:12:52 pm ---The rest, not so much: a major benefit of going out is to inhabit somewhere completely different, not to stay in cyberspace.

--- End quote ---

The trick is to do Augmented Reality -- experience the Real World enhanced with information from Other Places. It makes the Real World a more multifaceted place. And it takes less time to immerse yourself into something when you can apply the aggregate previous knowledge of the world on top of the actual experience.  The most obvious example to me is GPS and electronic maps.

--- End quote ---

That feels close to someone else indicating what I should experience, and to avoiding thinking and planning, and accidentally avoiding serendipity. (One of my favourite concepts and words!)

Do offline research, then experience X for yourself, then do research to find what you missed. And equally, what other people missed.

--- End quote ---

I argue they're essentially the same; what's being done is shortening the feedback cycle.

--- End quote ---

VR tends to present what someone else determines is interesting is to an average person, and too often that means profitable for them.

Offline research allows you to pull together multiple disparate sources of information that are relevant to your peculiar (even strange!) interests.


--- Quote ---For the furthering of knowledge, there's nothing like aggregating and criticising said knowledge and disseminating it (both before and after critique; what's in the cupboard can't be discussed, so dissemination is essential to critique). This, the Internet and the applications built on the changing circumstances that data flows are available and cheaply so, has made faster. 

--- End quote ---

Agreed, but that isn't VR.


--- Quote ---What I do when I travel is to make heavy use of online resources to plan in advance.  Then, I have stored information easily carried (one of my favourite tools is a GPS app for Android that is completely offline-capable; it uses OpenStreetMap data that can be freely downloaded) that is the guide book of what I have decided to do. As we travel, we verify and enhance the online resources we use -- the hotels all get reviews that add to data and so on.

--- End quote ---

I often use Openstreetmap, and have contributed corrections to it that Google continues to screw up. Prime example near me is finally recognising that an 80 year old road exists, but putting it in the wrong place (residents now put house numbers on their back gates!) and giving identifies some house with two different unique <cough> postcodes!

But Openstreetmap (and all the others) doesn't allow you to browse to find non-commercial interesting things that you didn't realise you might find - i.e. serendipity. As one example, see the difference between an Openstreetmap map and a "paper" map...






--- Quote ---But, having the tools available at low cost (thanks to the EU and their telco-whipping policies) makes it possible to do a more fluid information processing. What I described above is "easy" to do on paper too. I've done it, several times.  But, I'd rather not, again.

Two examples;

* Day before yesterday, we were zig-zagging around the northern peak of Luxembourg to do three earlier planned things, get from Dortmund to Sedan, shop and fill up diesel in Luxembourg (very cheap!) and pass Bastogne to see the Battle of the Bulge museum.  I went through this region with my parents a very snowy Easter in the early 80s and we were amazed at the amount of war memorials; there's one in every village, and not the usual "Aux Morts" we see in France, but a Sherman tank or similar. I had been talking about that with my own family, and on a whim decided to try finding one. Sure, 8 km away from where we were, there was a PaK 43 in a park, with a stone talking about the US 6th armoured division.  This took 5 minutes to find online, and enhanced the day.
* Yesterday as we were done with visiting the Main de Massiges outdoor trench museum, youngest son was hungry and specifically wanted pizza. Online, we located a pizzeria in a nearby town, got the directions and drove there. The pizza was excellent! This saved enormous amounts of time, and made for a better experience.
--- End quote ---

Online searching is usually better than offline searching. But browsing enables you to spot things you weren't expecting.

But, to me, neither of those is "true VR". Yes, I expect we could have long discussions about what "true VR" might mean, and wouldn't agree a definition but would agree on relative characteristics.

AVGresponding:

--- Quote from: bd139 on July 05, 2022, 06:37:44 pm ---
--- Quote from: Specmaster on July 05, 2022, 05:56:09 pm ---
--- Quote from: AVGresponding on July 05, 2022, 04:24:24 pm ---<Snip>

Lloyds have been very good for me for the last twenty-odd years, with good customer service in UK call centres. Though personally I would try to pick a bank with a branch as local to you as possible (such things do still exist, though sometimes I think they are only accessible from platform 12 3/4).



EDIT: Also their data centre is just down the road from me, so if they screw up I can knock on the door with a frowny face on...

--- End quote ---
Equally I can say the same about the Cooperative bank, local branches and an excellent banking app and 24hr telephone service.

--- End quote ---

Having contracted for Cooperative bank I would rather keep my money in BTC. The whole company is held together with sticky tape and string. That's all I'm going to say on the matter.

Oh and don't get me started on their funeral care who took £150 of donated flowers to the wrong bloody funeral, were late and an absolute shit show to deal with offering no compensation or even an apology from their branch or the call centre.

--- End quote ---

I still fume quietly when I'm reminded of this horrific example of corporate incompetence. As a Co-Op member, I was utterly disgusted when they chose to sell their profit-making farms in order to prop up their loss-making bank.

tggzzz:

--- Quote from: mansaxel on July 06, 2022, 05:33:53 am ---
--- Quote from: tggzzz on July 06, 2022, 12:30:09 am ---
OSmaps show interesting features that you didn't know existed.
VR stuff tends to have advertising features that you don't care exist. Plus black propaganda, fake news, and people/organisations flashing "look at me".

No contest really.

--- End quote ---

I very specifically wrote Augmented Reality, not "VR".  That is a thing, actually.

You don't have to be on the Holo-Deck to use the Tricorder.

--- End quote ---

Indeed, but there is a lot of grey overlap!

AVGresponding:

--- 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? 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.

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