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Search Again :: Adv Search 632 results in 0.001s
<1234567…22>
  • FS: Gould OS300 oscilloscopeHi all, I need some space on my equipment rack for a new "man enough for everything" bench power supply and lamentably my old analogue oscilloscope …

    ... and lamentably my old analogue oscilloscope has to go!

    Winston Winston September 2010 Sales
  • Best tools, oscilloscope for ZX Spectrum repairHi, Since I'm a newbie in this area, I'd like to ask about the most appropriate tools for ZX Spectrum repair. For example I'd like to purchase an a…

    ... to purchase an affordable digital oscilloscope which would be as small ... =STRK:MESINDXX:IT#ht_8579wt_904"]DSO Oscilloscope [/URL]
    Any other tools ...
    ZXMrk ZXMrk October 2010 Hardware
  • Oscilloscope Speccy ProgramHi all, I remember very well in the old days when my Speccy was my single computer (around 1992) that I have had an oscilloscope software. This uses…

    ... ) that I have had an oscilloscope software. This uses as far ...
    maskenlos maskenlos November 2010 Sinclair Miscellaneous
  • Oscilloscope recommendationsOscilloscope, precious, shiny things, me wants it! Me wantsss it! Er, so basically... I want to get a decent enough o'scope which would let me trace…

    Oscilloscope, precious, shiny things, me wants ...
    RobeeeJay RobeeeJay March 2013 Hardware
  • Settings on oscilloscope to see composite video signalHello, Learning a bit more about my new Owon digital 2 chan. oscilloscope. Would like to know what settings I should use to view a composite signal…

    ... new Owon digital 2 chan. oscilloscope.
    Would like to know ...
    thomas3120 thomas3120 December 2013 Hardware
  • ZX Spectrum video waveformsAll work for this post was done on a ZX Spectrum issue 1 board (16k bytes of RAM only). This was what the Spectrum displayed on the TV screen: [i…

    ... oscilloscope to add a negative offset value to get the waveform ... oscilloscope to add a negative offset value to get the waveform ... waveform coloured [color="brown"][b]brown[/b][/color] is the oscilloscope ... /> Channel A: the waveform coloured [color="blue"][b] ...
    1024MAK 1024MAK September 2016 Hardware
  • Composite Video output problemHi everyone, I?ve got a problem that?s really bugging me. I have one Spectrum 48K and one Spectrum +3, both with Composite Video output modification…

    ... access to an oscilloscope, check there's a waveform coming from pin ...
    Phu Phu December 2007 Hardware
  • Composite Video output problemHi everyone, I?ve got a problem that?s really bugging me. I have one Spectrum 48K and one Spectrum +3, both with Composite Video output modification…

    ... access to an oscilloscope, check there's a waveform coming from pin ...
    Johan Johan December 2007 Hardware
  • Analogue BeeperThere's been a discussion on foro.speccy.org about multichannel beeper stuff, and since I had the camera out and the scope set up, I set about demons…

    ... makes the wave on the oscilloscope:

    [code]
    org ... following, and see how the waveform differs. Not only is it ...
    Winston Winston January 2009 Development
  • Electronics Help!I've brought a little universal amplifier from Maplins which is to go into the arcade machine I have, so power its speaker from the computers line ou…

    ... on the end of an oscilloscope probe one day to see ... is (and how complex the waveform is with all sorts of ...
    Winston Winston May 2010 Chit chat
  • Replacing coil with other component?The purpose of the coil transformer, from what I gather in the schematics of the issue 2 spectrum, is to create 5V from about 9-10V. Would it not be …

    ... really need to use an oscilloscope. To start with, I'd ... . On most Spectrums, a sawtooth waveform with a frequency of 8 ...
    Zorn Zorn June 2012 Hardware
  • Issue 4S AnnoyanceRecently ive been going through a few interfaces testing them and I stupidly inserted a "key-less" interface (didnt know at the time but should have …

    ... /> There is normally a sawtooth waveform at TR5's collector (actually ... , I seem to recall the waveform is rather different in the ... look at it with an oscilloscope.
    Zorn Zorn May 2013 Hardware
  • Issue 3 board... How to resurrect?Dear Everyone, Now I have a working 48k Issue 3, a sort of working Speccy+ (still having problems with the keyboard, more of that in another post) a…

    ... do not own a reliable oscilloscope (mine is a very old ... have a decent digital storage oscilloscope, it is more useful to ... a ripple waveform on the supply lines without an oscilloscope by changing ...
    Pierre Pierre May 2013 Hardware
  • +2 Grey NMI problemMy shonky old +2 has always worked very well until recently, ive found that hitting the nmi button on my multiface will either do one of three things…

    ... there a way, without an oscilloscope, to test the M1 line ... show you what the actual waveform is like :smile:

    1024MAK 1024MAK May 2013 Hardware
  • Using downloaded WOS filesI am the new owner of a 48K Spectrum, which loads games from tape without any problems. I am not having great success with games downloaded from the…

    ... pure square wave and the waveform will have sinusoidal characteristics. At ... recorder to Spectrum with an Oscilloscope and found that it responded ... a 6V peak to peak waveform. As the other members already ...
    Pierre Pierre July 2013 Hardware
  • Issue 2 crashes after about 30 minsHi Guys, I have an Issue 2 zx spectrum that seems to get graphic corruption after about half hour of playing, then finally falls over and crashes. …

    ... (equivalent to the peak ac waveform from the transformer).
    If ... ), indeed the signal on a oscilloscope is a sine-wave that ... or a sine-wave type waveform.
    RMS multimeters are more ...
    1024MAK 1024MAK July 2013 Hardware
  • spectrum issue 6a oddityMorning everyone Bought a speccy (rubber key) from ebay in near mint condition - couldn't tune in on analogue particularly well so did the comp mod …

    ... where viewing the video waveform with an oscilloscope would be very useful ... . Having an oscilloscope with some fancy trigger features ...
    Zorn Zorn September 2013 Hardware
  • 128K RGB Display problem.I have just got my hand on a toast rack, but when powered and connected to the telly the picture jumps horizontally at random intervals. Could it be…

    ... due to the mains AC waveform "breaking through" to the Spectrum ... who has some test gear (oscilloscope), they could test the PSU ...
    1024MAK 1024MAK December 2013 Hardware
  • New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…

    ... observe anything useful on an oscilloscope (the waveform looks pretty much identical ...
    Winston Winston January 2014 Hardware
  • PSU Overvoltage?Going through a pile of 48k PSU's today, rewiring and fitting new plugs, testing each one as I go I came across one that outputs 14.85v, usually im g…

    ... measures the integral of the waveform and not the peak values ... much better to use an oscilloscope for measurement when working with ... the level is and the waveform.

    I posted in ...
    Pierre Pierre March 2014 Hardware
  • PSU Overvoltage?Going through a pile of 48k PSU's today, rewiring and fitting new plugs, testing each one as I go I came across one that outputs 14.85v, usually im g…

    ... mains, if viewed on an oscilloscope will look similar to a ... the rectifier diodes. The resulting waveform is now described as having ...
    1024MAK 1024MAK March 2014 Hardware
  • Help with 1-bit sampled soundHi all, I've been sent over this way from the CPC Wiki forums as you guys may be able to help me more specifically with a programming query. Firstly…

    ... .[/QUOTE]

    Whilst an oscilloscope would be very handy at ... card input to see the waveform.
    RobeeeJay RobeeeJay March 2014 Development
  • Burned finger temp on rubber 48k heatsink normal?Ok so i opened it up because a few keys started to act up and i noticed that after burning my hand the heatsink was that hot i could actually smell t…

    ... , as when viewed on an oscilloscope, it is the same as ... positive going part of the waveform). Hence the term "ripple", which ...
    1024MAK 1024MAK August 2014 Hardware
  • Spectrum & ZX81 PSU Strange VoltagesHi all I've just refurbished my ZX spectrum PSU after i accidently broke one of the wires i soldered the joints to the PCB nicely and all seems to b…

    ... unit is actually a mixed waveform. It is DC, but with ... assume you'd need an oscilloscope for that, and aren't ... for AC depending on the waveform? So a sign wave is ...
    RobeeeJay RobeeeJay August 2014 Hardware
  • Problem with ZX Spectrum 128k +2B Tv Output and RGB imageHello, Last week I've been ofered with a ZX Spectrum 128k +2B but I have a problem with the tv out (through RF modulator) .The image is clear on the…

    ... you have access to an oscilloscope (any type will do for ... a kind of a triangular waveform which should not dip below ...
    1024MAK 1024MAK November 2014 Hardware
  • The Spectrum Resuscitation ThreadKicking off this thread as a place where people who are fixing/restoring Spectrums (or indeed any other piece of related hardware) can show off their…

    ... you have a oscilloscope, you can see the output waveform under load ...
    1024MAK 1024MAK February 2015 Hardware
  • Gold Train in PolandWas listening to the radio this morning and the guy was talking about a train that has been found in Poland buried since the end of the war and possi…

    ... such - just a continuously changing waveform on a screen. Even if ... capability (many don't) the waveform wouldn't mean a lot ... hasn't just put an oscilloscope on demo mode and taken ...
    GReW GReW August 2015 Chit chat
  • ZX Spectrum 48k issuesHi all! A couple of days ago I bought my first 48k Speccy off ebay (I already own a beautiful QL expanded with QubIDE interface and 640k ram). It was…

    ... by the ULA with the oscilloscope I saw these "stops" periods ... least from the timing and "waveform shape" point of view). But ...
    Trantor Trantor January 2017 Hardware
  • Making sound using the BEEPER in AssemblyI had a look at the the documentation but it doesn't make sense to me. To make music just the beeper all I have to do is send ones and zeros to one o…

    ... ways to think about a waveform. One is to think about ... on! I used a simple oscilloscope program on my laptop so ...
    ivanb303 ivanb303 July 2018 Assembler
  • +3 - beeper sounds but no AY musicHi guys I am repairing a plus 3 revision 2 board that had no sound at all. Using schematics from https://zxnet.co.uk/spectrum/schematics/ I manage…

    ... R64 (either end) with an oscilloscope. (Wait a few seconds before ... C38 still removed. If a waveform reappears, reinstall C38 and remove ... pad or TR5) with an oscilloscope. If there’s activity, replace ...
    Ast_A_Moore Ast_A_Moore May 2019 Hardware
<1234567…22>

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  • I am currently watching.....
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  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21

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Related Threads

  • FS: Gould OS300 oscilloscopeHi all,<br /> <br /> I need some space on my equipment rack for a new "man enough for everything" bench power supply and lamentably my old analogue o…
  • Best tools, oscilloscope for ZX Spectrum repairHi, <br /> <br /> Since I'm a newbie in this area, I'd like to ask about the most appropriate tools for ZX Spectrum repair. For example I'd like to p…
  • Oscilloscope Speccy ProgramHi all,<br /> <br /> I remember very well in the old days when my Speccy was my single computer (around 1992) that I have had an oscilloscope softwar…
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  • Oscilloscope recommendationsOscilloscope, precious, shiny things, me wants it! Me wantsss it!<br /> <br /> Er, so basically... I want to get a decent enough o'scope which would …
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