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From: Jan Panteltje <alien@comet.invalid>
Newsgroups: sci.electronics.design,sci.electronics.repair
Subject: Re: Favourite Test Equipment
Date: Mon, 01 Apr 2024 11:36:48 GMT
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On a sunny day (Mon, 01 Apr 2024 09:39:59 +0100) it happened Cursitor Doom
<cd@notformail.com> wrote in <j6sk0j5cpqb46pt9tg6uvji35a2bstb9o8@4ax.com>:

>On Mon, 01 Apr 2024 07:01:34 GMT, Jan Panteltje <alien@comet.invalid>
>wrote:
>
>>On a sunny day (Sun, 31 Mar 2024 18:41:18 +0100) it happened Cursitor Doom
>><cd@notformail.com> wrote in <9k7j0jlnbhs8qfg5m17pium0835meean83@4ax.com>:
>>
>>>Hi all,
>>>
>>>I'm starting to get a bit fed up with having my test equipment blow up
>>>just when it's needed. This is the drawback with vintage gear; if it's
>>>not used frequently then it can go *bang* the next time you switch it
>>>on. It makes for good practice in repairing stuff, but wastes a lot of
>>>time which could be better spent doing other things.
>>>I think it's time I modernised my test gear. I was just wondering if
>>>anyone has any recommendations they can share. Is there a particular
>>>piece of test equipment you couldn't live without? Something you're
>>>particularly impressed with? I'd be interested to know so I can
>>>perhaps acquire said item and thereby reduce the number of explosions
>>>I experience.
>>>
>>>Thanks,
>>>
>>>CD.
>>
>>My 10 MHz Trio dual trace analog scope is from 1979 or there about, I blew up a channal once myself in the first week
>>when I accidently touched a booster diode in a TV I was repairing with it, fixed it locating the problem with the other
>>channel.
>>Later I cracked the graticule when a soldering station fell on it from the table (scope stands on the ground)
>>Made a new graticule.
>>So, and still working perfectly, OK for all things I build with micros.
>>For RF to about 1.6 GHz I use RTL_SDR USB sticks and the spectrum analyzer I wrote.
>>and for AC DC measurements I have some made in China digital meters and an analog one.
>>also a Voltcraft clamp-on meter for current when you do not - or cannot interrupt things with the meter impedance.
>>Also have a Voltcraft soldering station.
>>Blew up one of my digital meters a while back (volts on the resistance scale) but fixed it again (replaced resistor).
>>Many other test equipment I designed and build, like amplifiers LF and RF, SWR meter, radiation meters, gamma spectrometer,
>>GHz stuff for satelite, transmitters low and very high power, what not,
>>a frequency converter to use the RTL-SDR sticks and so the spectrum analyzer on higher and lower frequencies.
>>Have a SARK100 SWR analyzer too.
>>Things last forever here...
>>Scope used on a regular basis..
>>RTL-SDR stick 24/7.
>>Digital meters used every day.
>>Use my self designed lab power supply every day..
>>What more do you need?
>>Learn to use the stuff, understand what's important, and that is it
>>When I started in electronics as a kid I did not even _have_ a meter, still stuff worked.
>>Build my own scope at some point back then when I somehow got the parts
>>Not much pocket mony as a kid.
>>UNDERSTAND your systems, what electrons do.
>>Showing of with boat anchors may impress people, especially the clueless...
>>But it does not help you one bit.
>>Anything with an accuracy better than 1 percent in most cases is just like apes screaming load trying to impress other apes.
>>
>
>I don't think any of us here truly understand what electrons do, Jan!
>Boat anchors don't impress anyone nowadays; they're more likely to
>make one look like some sort of oddball mad scientist who couldn't get
>laid. ;-)
>I'm guessing you don't have a TV. Would I be right?

I learned the basics of how electrons behave and move as a small kid from this book:
 https://www.boekenwebsite.nl/techniek/zowerkt-de-radio
 'That is how radio works'
He also wrote
 that is how TV works
and
 That is how the transistor works.
I remember walking the streets of Amsterdam looking for usable parts for my own TV in primary school
Tried to make an OLED TV too. 

In high-school were I build an tube amplifier for the school band
I got an old tube CRT from a TV shop.
Made an HV generator using a car ignition coil on the output of an old EL84 audio amp,
made that amp oscillate by feeding back some output to the input.
The output of the ignition coil rectified by an old TV HV diode
Horizontal deflection coils on same amp
Vertical defection  coils on an other audio amp.
That was my first scope.
Not very high frequency..
Had a transistor FM transmitter of my own design working too,
we had a radio program!
As to understand electrons START THERE
That is what it is all about.
That is how I started as a kid, books from Van Aisberg
Later when studying electronics I got some old tube TV, and gradually replaced each part with transistors
rewound horizontal output transformer, build a new tuner.
By that time Elector magazine published the 'teletor'
 https://archive.org/details/elektuur-36-1965-11_20200524
  used some ideas from that and had my first transistor TV, mine was MUCH bigger had a real CRT.
In 1968 designed my own TV vidicon camara, left my current design job and started in broadcasting, hired on the spot,
6 month payed training in the school banks all about broadcasting all about television
Many years nothing but film, TV and audio, video recording, satellite, slow motion, video editing, running a TV studio, what not
So, you could f*cking learn a bit
Yes I have a nice Samsung TV and a portable one too.
I can build one from scrap in no time, but the digital decoders these days need a chip
but I can code that too.
 https://panteltje.nl/panteltje/newsflex/download.html
  https://panteltje.nl/panteltje/raspberry_pi_dvb-s_transmitter/

I like to open source things, worked in all sort of science fields electronics is used for,
from medical to space to army to navy to broadcasting, been there done it
Electrons try to understand, math is just about quantities and breaks down anyways as mamaticians will do a divide by zero
and claim a new reality.
EInsteinianism is brain dead.
hehe

PS I had a TV repair shop in Amsterdam for many years (see it is also going to ..repair)

..