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Search Again :: Adv Search 1000 results in 0.017s
<1…14151617181920…34>
  • Issue 4s - Not 'Jailbars' but lines alloverIt's not another 'Jailbars' question!, but I've got this Issue 4S that aside from the 'Jailbars' on the Paper area of the screen which I can live wit…

    ... that is mixing with the video signal.

    There are number ...
    1024MAK 1024MAK September 2014 Hardware
  • Issue 4s - Not 'Jailbars' but lines alloverIt's not another 'Jailbars' question!, but I've got this Issue 4S that aside from the 'Jailbars' on the Paper area of the screen which I can live wit…

    ... bet that the CPU clock signal is interfering with your picture ... sort of periodic signal is being superposed to the video signal.

    signal has a value of 0 ... . This means that the superimposed signal has a frequency of half ...
    mcleod_ideafix mcleod_ideafix September 2014 Hardware
  • New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…

    ... world from messing up the video signal.

    To prevent ... baseband (composite, s-video and RGB video) frequencies, where it is ... the same signal. Don't forget that composite video is called ... (or component) of the video signal must be correct (within the ...
    1024MAK 1024MAK September 2014 Hardware
  • New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…

    ... world from messing up the video signal.

    To prevent ... baseband (composite, s-video and RGB video) frequencies, where it is ... the same signal. Don't forget that composite video is called ... (or component) of the video signal must be correct (within the ...
    Renegade Renegade September 2014 Hardware
  • 48k TV IssuesHi all Quick question, how can i improve my 48k picture? (without composite mods...) currently it looks like this: [IMG]http://s26.postimg.org/oox…

    ... the wire that carries the video (goes from the PCB) into ... the slightly not to specification video signal :-D

    [B][I ...
    1024MAK 1024MAK September 2014 Hardware
  • ZX81 and Analogue TVsI recently bought a really nice ZX81 on ebay in amazing condition, but I'm having issues tuning in an old analogue TV to lock onto the signal. I und…

    ... “back porch” part of the video signal. This causes many colour TV ... “back porch” part of the video signal, and so is the most ...
    1024MAK 1024MAK September 2014 Hardware
  • Giving up on SpectrumsHi all... Bit of a downer post here... I'm really close to giving up on Spectrums.. My 48k has given me nothing but head aches since day one... and …

    Is it possible something's up with the PSU?

    Composite modded Speccies generally put out some kind of video signal unless there's no 5v supply (check output of 7805 reg) or the ULA is removed or seriously toasted :D

    B
    balford balford September 2014 Sinclair Miscellaneous
  • 'Interesting' Issue 2 modSo I've been lurking on this forum for a while and I've got to the point where I want to see if I can repair a speccy.. so I bought me a 'broken' one…

    ... no ULA, there is no video signal information. However, the modulator (if ... still produce the UHF carrier signal. Some TV's may therefore ...
    1024MAK 1024MAK October 2014 Hardware
  • 'Interesting' Issue 2 modSo I've been lurking on this forum for a while and I've got to the point where I want to see if I can repair a speccy.. so I bought me a 'broken' one…

    ... no ULA, there is no video signal information. However, the modulator (if ... still produce the UHF carrier signal. Some TV's may therefore ...
    blueowl0708 blueowl0708 October 2014 Hardware
  • Issue 1 oddityHello to everybody, I have a very first under my hands - a broken Issue 1. Apart from the classic "broken lower RAM" syndrome which will be easily t…

    ... line which gets into the video signal.

    Also bear in ...
    balford balford November 2014 Hardware
  • Detecting flash mode inversionsIs is possible to detect with certainty when flashing characters change from normal to inverted and vice-versa?

    ... is to look at the video signal ;p
    guesser guesser November 2014 Development
  • 128k Toastrack Composite Video output confusion!Hi everyone. Ok, so I have a couple of 48k's that I have performed Wombles fantastic composite mod on. They work great here in Canada on my big scre…

    ... greatly improves the Composite Video signal since you can't ... " in its signal which interfere with the video signal making it worse ... totally useless in a video-only signal you can change that ... can clear the (composite) video signal from the audio garbage but ...
    geosiou geosiou November 2014 Hardware
  • 128k Toastrack Composite Video output confusion!Hi everyone. Ok, so I have a couple of 48k's that I have performed Wombles fantastic composite mod on. They work great here in Canada on my big scre…

    ... not support the spectrum's video signal
    smogit smogit November 2014 Hardware
  • 128k Toastrack Composite Video output confusion!Hi everyone. Ok, so I have a couple of 48k's that I have performed Wombles fantastic composite mod on. They work great here in Canada on my big scre…

    ... greatly improves the Composite Video signal since you can't ... " in its signal which interfere with the video signal making it worse ... totally useless in a video-only signal you can change that ... can clear the (composite) video signal from the audio garbage but ...
    RSwipeCA RSwipeCA December 2014 Hardware
  • 128k Toastrack Composite Video output confusion!Hi everyone. Ok, so I have a couple of 48k's that I have performed Wombles fantastic composite mod on. They work great here in Canada on my big scre…

    ... either on the monitor's video connector (check if it is ... that produces a PAL composite video signal to try on this monitor ...
    1024MAK 1024MAK December 2014 Hardware
  • Which emulators support ULA+Tried ZX Spin 7.0, but its unstable. Tried to drag and drop .scr files onto it, but it comes out all wrong. Don't understand the TAP file that's sp…

    ... cannot decode properly the composite video signal. The camera also messed up ...
    mcleod_ideafix mcleod_ideafix December 2014 Development
  • Speccy Vs Amstrad CPC Vs C64I hope no one minds me posting this here as well as in the announcements section. I'll delete it if there is a problem. It's childish fun but can I …

    ... can't find a youtube video.

    Sample Tracker 2 ... I can't find a video on youtube.

    7 ... /> The method of using the video signal to generate audio was how ...
    Alcoholics Anonymous Alcoholics Anonymous December 2014 Games
  • Speccy Vs Amstrad CPC Vs C64I hope no one minds me posting this here as well as in the announcements section. I'll delete it if there is a problem. It's childish fun but can I …

    ... /> The method of using the video signal to generate audio was how ...
    Pegaz Pegaz December 2014 Games
  • RGB video issue on +2 and +3. Signal high?I have a couple of +3's and a new +2a that arrived today. When I plugged in the +2a using my RGB lead from Retro Computer Shack I was reminded of a n…

    ... the CPC's luminance signal to charge a cap ... with trying to use a video signal yes. I think it' ... It would depend on the signal levels, the capacitance, and ... ohm impedance like the other video signals. We are only ... to display the RGB video signals all the time ...
    guesser guesser January 2015 Hardware
  • ZX81 ULA Swap questionHi Can someone remind me if all three versions of the ZX81 ULA are electrically compatible? I just bought a ZX81 with an older ULA, so it lacks the …

    ... "back porch" part of the video signal.

    As the colour ... the features of the enhanced video signal.

    However... I have ...
    1024MAK 1024MAK January 2015 Hardware
  • ZX Spectrum+ video ? red on green problemThis is my first post on the forum, so let me introduce myself. I am retired for several years. For 30 years I have been a fan of the ZX Spectrum. I …

    ... check the quality of the video signal from the YUV-RGB converter ... the result (better than S-Video):

    [URL=http://www ... a good way of shielding signal wires from interference.

    video, as well as on the ...
    Boleslaw Jamroz Boleslaw Jamroz February 2015 Hardware
  • 3.4 Inch TFT with 48k Spectrum....hmmm?Hey guys, So I have been playing around with the idea of using a small LCD with composite input for a 48k Speccy. I got hold of one of these relat…

    ... a composite TV signal is a composite signal made up of ... picture information (if a colour signal)

    As a ... originally the composite TV signal was the result of demodulating ... to 100uF) allows the composite video signal through.

    However, ...
    1024MAK 1024MAK February 2015 Hardware
  • No display on a 128 toastrackHi All, I just bought a 128k off ebay with the usual, "it worked last time I used it", so I read into this "it does not work". True enough, it does n…

    ... and -12V).
    The composite video section needs a +12V supply ... -SCART leads use the composite video signal for the synchronization signals, if ... your pictures, all the visible video picture is there, but the ...
    1024MAK 1024MAK February 2015 Hardware
  • Video ZX Spectrum+ 48k<span>Good day ... is a bit of time that I try to fix my zx spectrum ... I replaced the ram 4116, all electrolytic capacitors ... but the monitor loo…

    The ULA generates the video picture. The LM1889 (a colour ... a type of component video signal to a composite video signal).

    Your ...
    1024MAK 1024MAK May 2015 Hardware
  • Phillips CM8833-mk11Its been a along time since Iv been on this site. Things in life happens, but I'm back. I have a question please. Just been given a working monitor b…

    ... models don't produce RGB video signals. If the Spectrum has ... possible to feed the composite video signal to some designs/models of ...
    1024MAK 1024MAK May 2015 Hardware
  • 48k issuesThe 48k speccy had several alterations ( issues) and I was wondering, they all seam to work ok so what was the point?<br>

    ... adjustment capacitors near the comp. video encoder IC, removed on later ... found a way to make video signal generation less 'critical' / dependent on ...
    RetroTechie RetroTechie June 2015 Hardware
  • ZX81 Composite Mod<p>I've done a simple composite mod to my Issue 3&nbsp;ZX81 following a basic schematic I found on one of the ZX81 forums. Mod consists of a BC547, 1…

    ... more fussy about the input signal compared to CRT displays :-(
    video signal they're fed.

    video output. Meaning a TV doesn ... that adds this to the video signal. With a newer version ULA ...
    RetroTechie RetroTechie June 2015 Hardware
  • Newbie Hardware QuestionsI just recently aquired my first Spectrum, a +2, and I'm in the process of getting acquainted with it. Being a newbie I had some questions, which …

    ... leads to sharper edges in video picture.
    Beside ... to use the composite signal at all. The best ... to be using the RGB signal. A RGB (50Hz) ... to a noticable delayed video signal that is not synchron ... which does not delay the signal and works very well ...
    ingo ingo July 2015 Hardware
  • another non working issue 3 48kHi all, next! :) I don't have good filings about this speccy :) https://youtu.be/D9qpCR18-kI here is short video what this speccy do. we hav…

    ... /> for not stable video signal i found in video part on mobo two ...
    gorski gorski July 2015 Hardware
  • ZX Spectrum+ adviceHey all, I just got a ZX Spectrum+ from eBay and I'm not sure yet what to do with it. I wanted to first take a peek inside, see what issue board it i…

    ... under power, using JoulesperCoulomb's video again. All voltages look right ... I wanted to test for video signal. Turns out that the original ... doesn't work for composite video (I didn't realize the ...
    lunarul lunarul August 2015 Hardware
<1…14151617181920…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
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