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  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... [/B][/SIZE]

    No video output at this moment, as ... to work with as little "noise" as possible (don't want ... behave as a 3-bit video DAC :)
    mcleod_ideafix mcleod_ideafix September 2012 Hardware
  • K-Mouse TurboReceived my K-Mouse Turbo interface this morning amid much excitement, packed the wife off to work and the kids off to nursery then went up to my man…

    ... />
    As for the composite video, this is pretty much a ... composite video signal on the edge connector, and some cause more noise ... comparable to the proper composite video mod within the modulator.
    rwap rwap October 2012 Hardware
  • 48k faultyHi guys! I have a 48k that, currently, presents 2 problems: 1 - Can?t sync to TV correctly. I get a lot of noise and the characters appear to be inc…

    ... to tap off the composite video signal from inside the Spectrum ... chance the modulator is feeding noise back on to it).
    video signal to the TV connector ...
    Zorn Zorn November 2012 Hardware
  • Strange failure modeI just had a 48K machine "fail" in what seemed like an odd way. Problem: Random keypresses (not from any particular part of the key matrix) appearin…

    ... around behind it with a video lead.

    I've ... I did that there's noise on the stereo line out ...
    guesser guesser November 2012 Hardware
  • my first 48kHi I have just got my first 48k and I can't keep it tuned in. And when it is its not very clear. Moving text and switching to black and white. some …

    ... too much digital noise makes it into the video signal. As always ... already suggested, taking a composite video signal rather than going via ...
    Zorn Zorn November 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... image, displayed through the composite video output.
    [img]http://www ... working fine, or there are noise on the address bus or ...
    mcleod_ideafix mcleod_ideafix November 2012 Hardware
  • Ay Real Time Synthetizer SoftwareSpectlemen and Spectladies!It's been a long time that I'd like to ask this.... I ask thee to create a new musical software for our ZX Spectrum machi…

    ... Shift

    Turn on noise on channel:

    Graphic ... = Noise Channel 1
    Edit= Noise on Channel 2 ... /> Noise period:

    True video = decrease noise period
    Inv Video = increase noise period ...
    DaRkHoRaCe DaRkHoRaCe November 2012 Development
  • Dead +3 drive. Help needed.While i am waiting for a TV master to find his demagnetizing loop to demagnetize my disks i decided to fix my third +3 drive today. I changed the b…

    ... your post and watching the video, I thought maybe the head ... you say it makes a noise which might mean it maybe ...
    Your Spec-chum Your Spec-chum December 2012 Hardware
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... except for the video signals /Y, U, V, VIDEO and 0Vvideo. This ... because the interface monitors the video signals in order to synchronise ... avoids the risk of additional noise being induced on them (which ... to use any of these video lines (when used on a ...
    Fruitcake Fruitcake January 2013 Sinclair Miscellaneous
  • The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…

    ... ground for analoge outputs as video and audio from the ground ... of video or audio output jacks. This way you avoid noise and ...
    ingo ingo March 2013 Hardware
  • Improving Composite Output of 48K SpectrumI've been playing around with this Spectrum 48k I got inside a dK'tronics keyboard, because well I've already got two working other ones so why not..…

    ... follower) that handles the composite video. F.i. when the ... /> The synchronisation pulses in composite video are negative, so below '0V ... ....

    Consider the 'video' part of the signal not ... source.
    Some of the noise may reach the LM1889 over ...
    roko roko March 2013 Hardware
  • Improving Composite Output of 48K SpectrumI've been playing around with this Spectrum 48k I got inside a dK'tronics keyboard, because well I've already got two working other ones so why not..…

    ... The synchronisation pulses in composite video are negative, so below ... =roko;690299]Consider the 'video' part of the signal not ... /> Some of the noise may reach the LM1889 ... look at how much noise is coming from the ... map out where all the noise is coming from.
    RobeeeJay RobeeeJay March 2013 Hardware
  • Improving Composite Output of 48K SpectrumI've been playing around with this Spectrum 48k I got inside a dK'tronics keyboard, because well I've already got two working other ones so why not..…

    ... ) puts some particularly noticeable noise lines into the video signal.

    joefish joefish March 2013 Hardware
  • Improving Composite Output of 48K SpectrumI've been playing around with this Spectrum 48k I got inside a dK'tronics keyboard, because well I've already got two working other ones so why not..…

    ... ) puts some particularly noticeable noise lines into the video signal.[/QUOTE]
    RobeeeJay RobeeeJay March 2013 Hardware
  • Project #1 : Speccy 128k+2 with diVide inside...Hi guys, I just have finished my Super Spectrum #1 The idea (I was thinking of that since 2007) was to fit an english grey +2 motherboard in a +2A…

    ... LCD TV (LG), on composite video (AV in).
    Picture is ... audio out pin (lot of noise), and using the computer audio ...
    bugpat bugpat April 2013 Hardware
  • WAV'sOk so i have used tap2wav to get my audio file on my pc , I get 10 of my favourite games in a folder , I then use the mp3 cassette adapter which i pl…

    ... problem , then i saw a video on youtube so i froze ... and final attempt , Signal and noise ratio of power amplifier:> ...
    ricky006 ricky006 April 2013 Hardware
  • Composite video for 48k Capacitor orientationHello, My multisystem TV is acting up and I'm unable to navigate the menu to tune in the RF signal for my speccys. However the A/V input still works.…

    ... .

    If unwanted noise is present and at frequencies ... meant to occur within the video signal generated by the ... have particularly intrusive amounts of noise on the display, so perhaps ... on discovering how the noise gets into the video signal in the ...
    Zorn Zorn April 2013 Hardware
  • Composite video for 48k Capacitor orientationHello, My multisystem TV is acting up and I'm unable to navigate the menu to tune in the RF signal for my speccys. However the A/V input still works.…

    ... switching noise that is introduced into the output circuit for the video ...
    Johan1973 Johan1973 April 2013 Hardware
  • Composite video for 48k Capacitor orientationHello, My multisystem TV is acting up and I'm unable to navigate the menu to tune in the RF signal for my speccys. However the A/V input still works.…

    ... on discovering how the noise gets into the video signal in the ... and ground planes. All the noise from logic switching pours out ...
    guesser guesser April 2013 Hardware
  • Composite video for 48k Capacitor orientationHello, My multisystem TV is acting up and I'm unable to navigate the menu to tune in the RF signal for my speccys. However the A/V input still works.…

    ... the spectrums video output are not used to avoid any noise. They ... series to the video signal does not remove noise but prevents the ... input.

    Reducing noise at the video line by adding capacitors ...
    ingo ingo April 2013 Hardware
  • 16 colours on a Timex Sinclair 2068I'm putting a few videos up on YouTube, the first one shows the colours on the TS2068. [url]https://www.youtube.com/watch?v=1tJ1qIMcTUE[/url] Brigh…

    ... will help with reducing the noise.

    The mod I ... . The main reason for the noise on the display, and the ... with it hopefully all the noise. But if that doesn't ... composite output with an S-video output. One of the phono ... any TV which supports S-video.
    rga24 rga24 May 2013 Hardware
  • The most insane book review(er) ever?I have just spotted [url="http://www.amazon.co.uk/review/R3AULYA4D8CO8B/ref=cm_cr_dp_cmt?ie=UTF8&ASIN=0861611101&channel=detail-glance&nodeID=266239&…

    ... ones buried in lots of noise. The breakthrough was realising that ... out the questions from the noise, answer the ones you can ... 's overall knowledge of Spectrum video playback routines, gain some karma ...
    gasman gasman May 2013 Chit chat
  • Issue 4A repair attemptI think I need some help. I have a nice Issue 4A main board here, which does not give out any video signal. I checked some voltages (the ones that se…

    ... did not notice any clicking noise, when I pressed a key ... ?s more broken than the video only. I could connect Ben ...
    schombi schombi July 2013 Hardware
  • Anyone using an RGB SCART cable with a +2A/+3 and LCD TV?In [URL="http://www.worldofspectrum.org/forums/showthread.php?t=44697"]a recent thread[/URL], I mused: [quote]Can +2As be composite modded? If so, I…

    ... RGB picture and the noise on the composite video pin :mad:
    1024MAK 1024MAK August 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 …

    ... an awful lot of noise on the video signal and perhaps that ... examine the nature of that noise, though it doesn't look ...
    Zorn Zorn September 2013 Hardware
  • Interface 1bisHas anyone on here got a "Interface 1bis": [URL="https://sites.google.com/site/interface1bis/"]https://sites.google.com/site/interface1bis/[/URL] I …

    ... tracks ->
    -> low noise, unequalled low power consumption , unequalled ... WOS ftp server. A .DVO video player was also written, mainly ...
    Dan Antohi Dan Antohi September 2013 Hardware
  • Parts listAre there any list of parts - caps, resitors, transistors etc. - for Spectrum motherboard revisions. Im thinking I may need to replace te electrolyt…

    ... known cause of a poor video picture.

    Flickering fluorescent ... the radio to receive static/noise, turn on the fluorescent lights ...
    1024MAK 1024MAK September 2013 Hardware
  • IntrospectAs previously promised (read: threatened), here's a new albums worth of music I've made: [url]http://www.mediafire.com/download/dwlv7ctca5v4a59/Rik_S…

    ... that's just the loading noise![/QUOTE]

    Haha! Many ... ;727648]Only listened to the video track so far, but it ...
    GreenCard GreenCard October 2013 Chit chat
  • Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…

    ... /> All leds are lit.
    Video through RGB gives some signal ... /> Was there some sort of noise when you shorted out the ...
    DEATH DEATH December 2013 Hardware
  • +2A/+3 composite modHi, Anyone has experience doing a composite output mod for +2A/+3? (yes.. I also have a working RGB) A while ago I did one based on the instruction…

    ... Speccy) causes distortions and adds noise (and the circuit used is ... TV or monitor, the video circuitry has to separate the ... the red, green and blue video signals, and the synchronisation signals ... adds even more noise.

    So a composite video signal is ...
    1024MAK 1024MAK December 2013 Hardware
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Latest Posts

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