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Test Equipment Anonymous (TEA) group therapy thread
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Vince:

--- Quote from: bd139 on July 04, 2022, 08:30:35 pm ---Your funeral  :-//

I ran shitboxes for years - one broke down on the way to a job interview. I didn't get the job.

--- End quote ---

Nope. Have run old '90's cars for 24 years now. At the same I have been watching every body else with their fancy modern cars, crying. I am the one laughing.

If it made sense to get a more modern one, I would run and get one tomorrow. But precisely because I have to count money, I have to stick to older cars (I much prefer them anyway, so win-win), and of course not buy ruins, and then maintain them myself to save on labour. But that goes for a modern car as well, it's just common sense.

Even the garage I sometimes rent  a lift at for some work, has endless stories about modern cars. He drools over my 5 pot Safrane. Even my local Renault garage in my village told me fuck keep your Safrane don't get modern junk it's a never ending expensive stream of problems. Saying "They don't make cars like this anymore.... keep you Safrane".

Well Sir thank you, that was my intention indeed.  :popcorn:

Same story when I take it to the MOT guy. He is on the front line to see old kinds of cars new and old.

m k:

--- Quote from: Robert763 on July 04, 2022, 08:39:51 pm ---
--- Quote from: m k on July 04, 2022, 08:04:23 pm ---
--- Quote from: Robert763 on July 04, 2022, 05:11:35 pm ---
--- Quote from: m k on July 04, 2022, 10:45:12 am ---<SNIP>
 

--- End quote ---

Yes, CRTs are definitely interchangeable.

So monitor hack, shouldn't be overly difficult.

Old Hitachi/Matsushita schematics is too old and something seems to be missing but those two neck boards are very same.
Older neck board uses 74S03 as parallel inverters powering contrast trimmer directly and newer one seems to be different only from there.
Oldest has no neck board but contrast pot connection is pretty exactly same as 74S03 version of neck board.

Are all those 54620-series machines already closed.
More revealing solder side picture of neck board would be nice.

Completely forgot 54645A/D, its resolution was clear.
313 V x 512 H (pixels)

That's clearly PAL, but proportional and lowres.
Is there visible space between H-lines?
Back in the day CGA was clearly using only every other line of available physical pixels.
From pictures online there could be something missing but it is not much, dimming can reveal something but it doesn't change anything.
Full hires for PAL is 31250Hz H-sync, 31500Hz for NTSC.
Old Hitachi/Matsushita schematics has 24270Hz as H-sync and 60Hz as V-sync so 404 lines possible.

PAL and NTSC were also defined as 720 pixels wide, but no idea how much was physically available, not much more I guess.
One thing I remember though, very small pictures were exceptionally sharp.
So more than 500 was a norm already back then but no idea what was the major barrier, screen material or cathode ray energy.
FET in newer neck board indicates that rising time had a role.

From online pictures I'd say that 54600B grid is 100x60 pixels, vertical center line is around 128.
Vertical 256 must be a grid area, horizontal 500 seems to be all.
54622D pictures were pretty bad but horizontal pixel count seems to be more than those 54600Bs.

How this all then should be converted to VGA or SVGA.
Anti-aliasing is difficult when contrast is high and lines narrow.

One other thing, PAL pixel is not round, for that it needs a 5:4 screen, but that is for 576 visible scanlines.
Very nice, and clear.
What is the shape of the screen here?
Online pictures are pretty hopeless.

--- End quote ---

PAL and NTSC don't have pixels, only lines. Horizontal resolution is only limited by bandwidth.

--- End quote ---

What is your point?

--- End quote ---

You can't discuss PAL or NTSC in terms of pixels, they are analog standards not digital. I know where you are coming from, there ARE difgital standards that are basically equivilent to PAL and NTSC and can be displayed on analog monitors but they are not PAL or NTSC (ignoring the fact that PAL ant NTSC are in fact colour / color encoding standards)
[/quote]

Ok.

But this whole forum is more or less following updated standards, why not PAL and NTSC?
Pixels came to video signal when broadcasting company got their first digitizers.
TVs had also color rasters and if input was only RF it was quite close to video with pixels.
Finally pixels came to video with DVD, their visibility is another thing.
mnementh:
Having done both the "getting your maximum value out of the beginning of a car's life" and the "getting your maximum value out of the end of a car's life" thing, I know pretty much exactly how to do both, down to the penny.

Doing the latter only makes sense when you are young and dumb and fulla cum, and you can afford to have your car break down frequently, as in more often than every few years. When you get older, time and money wasted obviate the need to get a new or very low-miles current model car as your primary ride. Old faithfuls like our Saturn are okay as a second vehicle, or to keep around so you can pass it down to the kids.

But as a primary vehicle? Even at 35MPG, money pissed away and misery looking for a place to happen every time you turn the key.

mnem
*rode hard and put away wet one time too many*
Vince:
I don't know. YMMV. I can only speak for the old cars I bought here, I can't speak for your old cars.  :-//

If they were shit and full of trouble then yes, flog them. I don't have problems with mine and they are cheap and easy to maintain myself, so I keep them. Simple  :-//
My first car I didn't know much about cars, so I got burned, but then you learn and the next you chose more wisely, that's all  :-//

If you can't tell a lemon, from a decent old car, yeah best to stick to a modern car and pray, if they can afford it.

It's like buying anything used really.

If you know squat about scopes,; you buy a shit box for 250 Euros, or buy a nice one for 50.. only difference is how much you know about scopes. Just don't buy the junk  :-//

As for costs again, makes me laugh. It's like saying my TDS 694C is junk. Well OK but it works and if you want the same B/W and sampling rate from Tek today, it's 50 or 100K maybe, I guess.I paid 250 euros for mine. So yeah, the other day I noticed a couple keys near the CRT don't work anymore, but yes, you can bet your ass I find it worth going through the trouble of fixing those keys, no matter how old and junky this scope might seem to most people. It doesn't have an LCD screen ? Yeah, so what ?!

And as far as I can tell, your old Saturn fits the old junk category, so how comes being so wise, you haven't splashed 50K to buy a new car ?
mansaxel:

--- Quote from: bd139 on July 04, 2022, 05:12:09 pm ---
As for stuff working on iPhones only, that’s a fairly new thing. Android has some architectural flaws which make it utterly unsuitable for carrying out business with any privacy requirements. Organisations are starting to see it as a risk. The one I work for has a complete ban on Android globally.

--- End quote ---

Swedish Defence forces issues only iPhones. Period. They gave out Microsoft phones as long as there were any, and I had one, but now it's only iPhone.  And I trust the people who make those decisions; they're no-bullshit open-eyes realists with a sense for proportions. Not afraid to make uncomfortable choices.
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