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<1…15161718192021…34>
  • +3 sound cureHi all, As most of us know the Spectrum+3A has this sound problem, distortion. The +3B had this problem fixed. I done some looking at the circuitry l…

    ... 3 modded for composite video output, I discovered ... carrier onto the video signal before entering ... interferrence between audio and video signal inside the TEA2000 ... to improove the composite video signal. High frequencies ... 16?H and a capacitor of 100pF from ...
    ingo ingo October 2009 Hardware
  • Tuning issue 48KHi. I have just bought a 48K rubber key version and am having trouble tuning it in. I have tried two newish CRT televisions but get the same picture.…

    ... modulator input and ground, a capacitor as mentioned in the proper ... ' connector: Insert a 10 pF capacitor in the RF signal directly ... direct to this connector. Then Video as well as RF can ...
    roko roko October 2009 Hardware
  • Tuning issue 48KHi. I have just bought a 48K rubber key version and am having trouble tuning it in. I have tried two newish CRT televisions but get the same picture.…

    ... ' connector: Insert a 10 pF capacitor in the RF signal directly ... direct to this connector. Then Video as well as RF can ...
    crazylarry crazylarry October 2009 Hardware
  • zx81 repairare they easy or very tricky to fix, just curious? getting one , that displays but no cursor.. so hopefully I can get parts to fix it. I started off…

    ... you can't get a replacement for easily. The only place ... TV (UHF modulator) into composite video output.

    Ofcourse you ...
    RetroTechie RetroTechie November 2009 Hardware
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... used in conjunction with the video mode that I propose. Is ... existing already in the ULA+ video mode, is sufficiently good that ... ) to work as a hardware replacement for the original ULA, b ... you create a brand new video mode that is unrelated to ...
    chev chev December 2009 Emulators
  • Faked MP3/memory sticks etcI recently bought an MP3 player on Ebay from jolly old China. I suspected it would be fake as it was advertised as a 16gb MP3/MP4 player and cost me …

    [QUOTE=Zoffy;424604]Get yourself a Sansa Clip[/QUOTE]

    Already got one.

    Nice but mine is only 2gb and they doesn't have the video option.

    Still waiting on my replacement '16gb' china one....
    beanz beanz February 2010 Chit chat
  • Is there any video input on expansion bus?Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that…

    ... for ULA read operations during video generating and create VGA output ... this is basically my ULA replacement with outboard memory for the ... ;-) )

    I assume this replacement is 100% compatible with the ...
    csmith csmith March 2010 Hardware
  • Image to ZX Spec 1.1 Now Freely Available!Image to ZX Spec 1.1 Now Freely Available! [IMG]http://mirror.viperfang.net/silentdevelopments/images/ent-preview1.1.zx.png[/IMG][IMG]http://mirror.…

    ... absolute rubbish and it's replacement JMC isn't due until ... , in short cross platform avi video codec support is very very ... related note the tap file video quality I attached earlier converts ...
    brownb2 brownb2 March 2010 Announcements
  • Crappy video in +2B/+3Maybe it's not a failure in my ZX Spectrum, but I need some advice... I've got some spectrums (a ZX Spectrum +, two spanish ZX Spectrum +2B and a mo…

    ... of 12V
    - Add a capacitor of at least 22uF in ... lowering to +5v, but the capacitor will wait another week (shops ... conjunto y la salida de video est? bien referenciada)?
    Zup Zup March 2010 Hardware
  • Crappy video in +2B/+3Maybe it's not a failure in my ZX Spectrum, but I need some advice... I've got some spectrums (a ZX Spectrum +, two spanish ZX Spectrum +2B and a mo…

    ... removing anything.

    The capacitor will remove the DC component ... USB capture device has a capacitor at its input so it ... video signal has.

    So, if you cannot use a capacitor ... I was poking its composite video output)

    ---
    ...
    mcleod_ideafix mcleod_ideafix March 2010 Hardware
  • Image to ZX Spec 1.1 Now Freely Available!Image to ZX Spec 1.1 Now Freely Available! [IMG]http://mirror.viperfang.net/silentdevelopments/images/ent-preview1.1.zx.png[/IMG][IMG]http://mirror.…

    ... absolute rubbish and it's replacement JMC isn't due until ... , in short cross platform avi video codec support is very very ... related note the tap file video quality I attached earlier converts ...
    LCD LCD March 2010 Announcements
  • Crappy video in +2B/+3Maybe it's not a failure in my ZX Spectrum, but I need some advice... I've got some spectrums (a ZX Spectrum +, two spanish ZX Spectrum +2B and a mo…

    ... with a 22uF capacitor: black screen (NOT blue, so video output generating ... some signal).
    - Lower voltage with capacitor: still ... ), but still same quality. With capacitor, I get a "blue screen ...
    Zup Zup March 2010 Hardware
  • replacing damaged zx-spectrum board with an altera-based cloneAfter knowing and trying altera-based hardware clones like C-One, 1ChipMSX, those so popular famiclones (NOAC) - it seems there are some similar abou…

    ... broken, they'd need a replacement keyboard foil, and possibly ... /> You have similar issues wih video (RGB/VGA vs. #YUV / ... comp.video), storage (MMC/SD cards vs ... t be the problem, replacement keyboard foils exist, replacement faceplates exist, so ...
    RetroTechie RetroTechie March 2010 Hardware
  • Scart/Composite output for 48K SpectrumHas anybody been able to achieve a Scart or Composite out put for a 48K Spectrum? If not, this is a badly needed modification. Modern TVs are not cut…

    ... 2008/11/zx-spectrum-composite-video-mod.html"]http://womblesretrorepairshack. ... /2008/11/zx-spectrum-composite-video-mod.html[/URL]
    ... Swedish fix that uses a capacitor instead:

    [URL=" ... question is, what does the capacitor do for us, and ...
    joefish joefish April 2010 Hardware
  • Scart/Composite output for 48K SpectrumHas anybody been able to achieve a Scart or Composite out put for a 48K Spectrum? If not, this is a badly needed modification. Modern TVs are not cut…

    ... Swedish fix that uses a capacitor instead:

    [URL="http ... .[/QUOTE]I build the S-Video from this side. Very good ...
    -Micky -Micky April 2010 Hardware
  • Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky

    ... might like a plug-in replacement for the Speccy's lower ... versions yet (or touched the video circuitry, apart from disabling the ...
    RetroTechie RetroTechie April 2010 Hardware
  • Spectrum 2+ R/F Box issues.Hi people, Not done alot here but looks as-if I may need some assistance with my +2 I recently bought. I was testing the machine out and all was ok…

    ... my 48K to give Composite Video straight out of its UHF ... even had to get a replacement portable TV so that I ...
    Alien 8 Alien 8 April 2010 Hardware
  • Spectrum 2+ R/F Box issues.Hi people, Not done alot here but looks as-if I may need some assistance with my +2 I recently bought. I was testing the machine out and all was ok…

    ... my 48K to give Composite Video straight out of its UHF ... even had to get a replacement portable TV so that I ... R/F output with a video (yellow) phono port with my ...
    tokyoracer tokyoracer April 2010 Hardware
  • +3 ProblemsI have been having a few problems with my +3 and I am wondering if anyone can help or give me some advice: 1. I have 2 blank disks which I have save…

    ... cut out the capacitor that mixes audio and video (so you'll ... get clear video without audio ... ); or you could build a composite video output ...
    Zup Zup May 2010 Hardware
  • I'm thinking of buying a laptop...I've never had a lap top before and I've been toying with the idea of buying one for a while now. I don't fancy a second hand one (they are very easy…

    ... found a HowTo video on YouTube about keyboard replacement. So bought a ...
    Geoff Geoff May 2010 Chit chat
  • damaged spectrum+ (blinking squares)Hi, Sorry for my poor english, but I couldn't find on family forums any remedy for my hardware problem with my first speccy in my life :) I've bought…

    ... voltage conversion circuitry that serves video + lower 16K RAM chips (4116 ... on this forum which lists replacement types for the transistors). And ... to insert a quick, temporary replacement for that lower 16K in ...
    RetroTechie RetroTechie May 2010 Hardware
  • Challenging the orthodoxy - Composite modWell, what's brought this on is two things: firstly I composite-modded an Issue 4S board this weekend in preparation for the Vintage Computing Festiv…

    ... They brushed up the video stage needed for the ZX81 ... -out of the existing video signal is low enough ... mtrs. (When we consider video as a 10 MHz ... 390 Ohm) via a large capacitor, then such load (loudspeaker?) ...
    The '75 Ohm video' is no real load concerning ...
    roko roko June 2010 Hardware
  • Challenging the orthodoxy - Composite modWell, what's brought this on is two things: firstly I composite-modded an Issue 4S board this weekend in preparation for the Vintage Computing Festiv…

    ... 'Elektuur'. They brushed up the video stage needed for the ZX81 ... a b&w composite video signal directly out of an ... component, so I added a capacitor to above circuit. I found ... good without a series capacitor. Adding/removing that capacitor is so easy ...
    RetroTechie RetroTechie June 2010 Hardware
  • How to make a comp video cable for +2 greySorry to bog, maybe the clue is just laiden on another thread but.... I have just obtained a 128 +2 grey, fully working BUT the aerial signal is bad…

    ... , pin 2 ground) BUT the video is horrible..... Vertical yellow or ... ? My clumsiness, some capacitor expired, or the infamous video transistor mounted twisted ...
    Cignale Cignale June 2010 Hardware
  • How to make a comp video cable for +2 greySorry to bog, maybe the clue is just laiden on another thread but.... I have just obtained a 128 +2 grey, fully working BUT the aerial signal is bad…

    ... to worry about to the "video transistors backward mounted on +2 ... capacitor (C31 = 20pF) that adds the audio carrier to the TEA2000 video ...
    ingo ingo June 2010 Hardware
  • How to fix dc voltage on a 48+ psuAfter dinner, after a womble video out mod on a "new" purchased 48+ , just in the remaining time I tested the voltage of its psu and, surprise surpr…

    ... ]After dinner, after a womble video out mod on a "new ... were 4 diodes and a capacitor... No reostate (I hope this ...
    guesser guesser June 2010 Hardware
  • Picture interference on red areas.I recently got a 48K Speccy off eBay, did a composite mode and it seemed to work OK, but then my TV had to go off for repair so I didn't use it for a…

    Could have to do with aging, in that case most probably the electrolytic decoupling capacitors around the video chip are suspects. As fast experiment you can safely try a known good capacitor in parallel with existing ones.
    roko roko July 2010 Hardware
  • Who can repair a 48K Spectrum?My Spectrum is broken, please see: [url]http://www.worldofspectrum.org/forums/showthread.php?t=29351&highlight=7805+heat+sink&page=2[/url] Does anyb…

    ... Spectrum + with composite video conversion as a replacement, but at some point ...
    Alien 8 Alien 8 August 2010 Hardware
  • BITWISE operators...Hi Folks, Another question - is there a way (fast) to do bitwise operations in Sinclair BASIC? Many thanks Paddy

    ... QL with an open source replacement ROM. Not sure what the ... ROM that uses the shadow video RAM to give you about ...
    chev chev August 2010 Sinclair Basic
  • SpecOS progressOk, As you can all see, I'm back - and I've been working away on SpecOS for a while now. There's a few videos, which you can see on my blog: [url]h…

    ... this is to be a replacement OS (eventually) then will access ... to interface with fixed disks, video cards and not much else ...
    Dunny Dunny August 2010 Sinclair Miscellaneous
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Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
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    John Elliott on April 21
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    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
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capacitor 1.5K 2.2K
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