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Old 22nd August 2008, 04:40 AM   #1
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Default my first oscilloscope

finally i got my oscilloscope. it is 20mhz. i think it should be ok for amp checking. i bought quite new in condition but used in electronics industries for four years. its looks working very good.
looks new too...

i attached the picture.

model is MATRIX MOS-620. i don't have any user manual. i also have to make two probes. how to make probe?

i am trying to post picture but can't upload.
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Old 22nd August 2008, 04:57 AM   #2
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picture Click the image to open in full size.
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Old 22nd August 2008, 04:58 AM   #3
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buy at least one regular probe with 1x/10x switch
they are much more conveniant and safe to use than DIYed stuff.
regards
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Old 22nd August 2008, 10:49 AM   #4
Mooly is offline Mooly  United Kingdom
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At last Thats good Michael. Now you really need a signal generator to go with it.
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Old 22nd August 2008, 11:17 AM   #5
lineup is offline lineup  Sweden
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Default Re: my first oscilloscope

Quote:
Originally posted by space2000
finally i got my oscilloscope. it is 20mhz. i think it should be ok for amp checking. i bought quite new in condition but used in electronics industries for four years. its looks working very good.
looks new too...

i attached the picture.

model is MATRIX MOS-620.
thanks space2000
your scope will do better than mine
if it is okay & not defect

Here are some older models
there are many out there
See pictures of different scopes here
http://www.thevalvepage.com/testeq/scope.htm

This is my own.
got it for free
by a kind person in my town
he had it put away in some attic

now i can use it for my audio amplifiers
it is all tubes/valves oscilloscope
the preamplification is done by a number of low noise EF86 penthodes (not triodes)


D43R - Made in London, England ... now in Sweden
Click the image to open in full size.
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Old 22nd August 2008, 12:05 PM   #6
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hi mooly,

hmmmmmm now can do......lots...

it is full functioning well as they said to me. now i have seen btr to perchase a probe. the scope is 20mhz should be enough for checking amp right?

i need a signal generator circuit. which signal frq will be enough for testing amp?

i can make signal generator by using timer ic or if i can get timing delay for hrtz then i can write software for microchip to produce the freq as i need. i have to get freq data with timing delay first.

may be you can show me any signal generator circuit.

lineup, your scope is really nice. you r so lucky to get it free. those are good scope. how many mhz speed?


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Old 22nd August 2008, 12:20 PM   #7
lineup is offline lineup  Sweden
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not know really thespeed
but i can do anything with high precision <= 2 MHz (2000000 Hz)


*** audio band is less than 20 - 20000 Hertz
at least for my ears.

* but i can not speak for those that can hear much more.
Like 200 kHz or even 2 MHz.

Those people are not many .. not on this planet, I can say.
and this is not one LIE .. it is one REAL TRUTH

Those stupid high frequency phreaks - they do know nothing of good real audio.

Lineup
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Old 22nd August 2008, 04:31 PM   #8
Mooly is offline Mooly  United Kingdom
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I would try and get a function generator -- sine/square/triangle etc usually with other features as well. If you just want a source of low distortion sine waves to begin with use a test CD.
A good function generator will cover from well below 1 Hz to at least 1 MHz, and some go much higher.
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Old 22nd August 2008, 11:23 PM   #9
Pingrs is offline Pingrs  United Kingdom
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"not know really the speed"

My old Telequipment Type 43 maintenance manual quotes:

"DC-15Mc/s at100mv/cm"
"DC-1Mc/s at 10mv/cm"

Brian.
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Old 23rd August 2008, 05:01 AM   #10
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Quote:
Those stupid high frequency phreaks - they do know nothing of good real audio

We stupid HF freaks design amplifiers not oscillators!!!

2 MHZ is very good to see your amp go into oscillation,high
freq. ringing w/ sqaure wave, etc. I use cheap PC scope w/
1MHZ and can see cap. load w/ square ringing at 100's of KHZ.
The more bandwidth the better.

As far as function generators,PC software based ones are
very good and getting better (True RTA) as long as your sound card is up to it. (192khz sample) There are many kits and
schematics that would provide very good if not superior
performance if you lust for true hardware.http://www.maplin.co.uk/Module.aspx?...NTION&doy=23m8
(velleman kit)
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