Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
tggzzz:
--- Quote from: Cerebus on July 04, 2022, 11:49:09 pm ---
--- Quote from: xrunner on July 04, 2022, 11:08:11 pm ---
--- Quote from: Cerebus on July 04, 2022, 11:05:45 pm ---
Nothing like it. The previous model, the iPhone 6s (first sold sept 2015, end of sale sept 2018), runs the current version of iOS and is still getting updates.
--- End quote ---
Yep 6s here working like a champ and does everything I need. But will upgrade eventually.
--- End quote ---
My current phone is the original iPhone SE (which is basically a 6s in a 5 sized case). I got it specifically because it was the physically largest iPhone I could tolerate and as a Mac user of many years it was time that I gave in and just accepted that if I wanted a phone and computer that would work together (after many failures with Android working with any computer) I had to get an iPhone.
I'm upgrading when I'm forced to and not a minute sooner, unless by some miracle Apple realise that there are people who want a phone that fits a pocket comfortably and are content to leave it there 99% of the time.
--- End quote ---
I require that my phone fits in my pockets since that's the only place which I can use to ensure that I don't put it down and forget to pick it up.
I require the pockets are in my trousers since that the only pockets where things won't fall out and it is the only thing I won't change during the day.
That requires that the phone be a clamshell, firstly to fit comfortably, and secondly so the screen isn't rapidly scratched/broken.
I might well use a modern equivalent of an integrated HP OmniGo 700, but nobody makes anything remotely similar.
Hence, no minaturised "One Per Desks" for me.
tggzzz:
--- Quote from: Specmaster on July 05, 2022, 09:17:41 am ---
--- Quote from: mnementh on July 05, 2022, 02:37:45 am ---
--- Quote from: Zucca on July 05, 2022, 12:27:29 am ---
--- Quote from: tggzzz on July 02, 2022, 09:22:44 am ---In the UK gas is much cheaper than electricity, and is commonly used for central heating, water heating, and cooking.
--- End quote ---
I have two problems with gas.
1)
Look at the efficiency of my gas water heater:
I can't sleep at night when I thing that 38% of my DHW gas (bill) is going to heat up the sky/stars.
2)
BTW: I adore climate town YT channel.
That's why I am switching to a Rheem Pro Terra
--- End quote ---
Except that generating and delivering an equivalent amount of heat as electricity is an order of magnitude less efficient than burning the natural gas directly to heat your food or water. No matter what mumbo-jumbo they're spouting, you still need to expend a certain amount of kilocalories to heat a galllon of water or to cook a dozen eggs.
You want to really save energy and minimize your CF, get a more efficient washer and dryer and keep the gas heater and stove. Get a more efficient gas water heater; current models extract so much of the heat they vent through 2inch PVC.
mnem
:=\
--- End quote ---
Also of course, the heat lost in the process of cooking, is not really lost in the winter as it contributes to the warming of your house? Its only in the summer months that the heat loss is really adding to global warming without adding anything useful in return :-//
--- End quote ---
Precisely.
Electricity generation (in a thermal plant) is only 28% efficient. The rest of the energy is usually wasted in the power station.
Heating food with gas deposits the "excess" energy in your house. In a cool country that isn't wasted. In a hot first world country you will probably use extra energy in air conditioning to remove that heat.
tggzzz:
--- Quote from: Vince on July 04, 2022, 11:52:47 pm ---So wow... can't believe it, this 2525 is a RACE CAR !!!! 120V/µs 20MHz ?!! :wtf:
--- End quote ---
And then you look at the slew rates of earlier current feedback opamps :) Or modern opamps that have to be capable of driving modern ADCs/DACs :)
m k:
Back to the PAL.
I measured 54622D visible screen area from online picture and got exactly 5:4.
Is that correct?
Pictured knobs were round.
Vertical resolution was also sort of HD compared to 54600B but picture was JPG and not huge.
@mnem, did you measure your machine's H-sync, what was it's frequency?
From online pictures I'd guess that resolution is double and double compared to old model.
True double from that old schematics would be 24720Hz * 2, pretty much.
Back to the monitor.
Single color CRT doesn't need any rasters, if not for picture enhancement purposes.
Some older 546xx model online pictures have clearly straight edged pixels but some other ones are far from it.
So no raster.
Many kinds of CRT glow properties were also available.
So even if video monitor can be tuned to accept 546xx signal maybe its CRT internals are not suitable.
Resolution per se is not a problem.
Computer world had MDA and HGC but both are still under 20kHz horizontally.
MCGA was also available once, it is vertically like CGA/VGA.
The main issue with video monitor is interlace and its process.
There deflection goes from top to bottom twice and second round must be informed somehow.
If that then is controlled by a chip it may not like that half picture just continue continuing.
Vertical size is not usually a problem, usually it can be trimmed out of proportion.
With high resolution monitor its resolution can be an issue though.
There vertical pixel count is meant to be high and less of it can make a sparse picture.
There it can also go so that one line is missing but third is not, that is also what can be expected when resolution of signal and resolution of LCD are not buddies.
E,
H -> V
Vince:
--- Quote from: McBryce on July 05, 2022, 08:13:12 am ---Why are you trying to do this on a phone at all?? I'm sure you have a PC with a speaker, microphone and internet connection. Click the link on a PC and you don't need the phone to be involved at all. For free, without having to register or give credit card details.
McBryce.
--- End quote ---
No there are no mic or camera on my computer, otherwise I would as you say just use that, rather than trying to get it working on a bloody smartphone ! ;)
It's a desktop computer not a modern laptop which have mic and camera as standard since these days laptops are basically closer to a glorified smartphone than an actual computer.
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