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  • 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…

    ... .
    - Tested with a 22uF capacitor: black screen (NOT blue, so ... signal).
    - Lower voltage with capacitor: still black screen.
    - I ... ), but still same quality. With capacitor, I get a "blue screen ...
    Zup Zup March 2010 Hardware
  • Do not open, no idiot servicable parts inside.Hi im very sad abd in need of some help thanks. Ok heres the deal i bought a second hand pc, it worked brill the only problems were the psu didnt fi…

    ... debatable, but any high voltage capacitor should be treated as a ... terminals just in case. One capacitor looks like another. You never ...
    Winston Winston March 2010 Chit chat
  • Do not open, no idiot servicable parts inside.Hi im very sad abd in need of some help thanks. Ok heres the deal i bought a second hand pc, it worked brill the only problems were the psu didnt fi…

    ... . I think that was a capacitor discharging in a different way ...
    Hairy Hairy March 2010 Chit chat
  • Broken or upgraded ZX Spectrum 48kHello First i want to say hello to everybody. I have a new ZX Spectrum 48k in my collection. Seller said that it is broken (no picture). I have this…

    ... , like a defect chip or capacitor. (After exchanging 7805 of course ...
    roko roko April 2010 Hardware
  • New game out now: Final Fantasy ZXEver since I played the games on the SNES, I thought that it should be possible to make a strapped-down version for the Speccy. Just minus any super …

    ... electricity needed for the flux capacitor :(
    dm_boozefreek dm_boozefreek April 2010 Games
  • 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 ... question is, what does the capacitor do for us, and is ...
    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 ...
    -Micky -Micky 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…

    ... question is, what does the capacitor do for us, and is ... Maplin?[/QUOTE]
    A. the capacitor will only allow the 'signal ... .S. you could insert the capacitor without removing 'TV' from the ...
    roko roko April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... it works , also look the ceramic capacitors near crystal. And at ...
    Gods Gods April 2010 Hardware
  • Strangely, I just can't STOPOK, I bought an RWAP keyboard matrix and put it in my Spectrum+ last night (ta), I did the Swedish composite mod with a capacitor, I fixed the missin…

    ... as (part of) a capacitor. Now the first current that ... just fill up (load) the capacitor. This means that some time ... understand that loading a large capacitor (+ keyboard foil) takes longer ... current to flow into the capacitor, resulting in a faster loading ...
    roko roko April 2010 Sinclair Miscellaneous
  • Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky

    ... : better replace 22nF with ~100nF ceramic, and electrolytic with new ones ...
    RetroTechie RetroTechie April 2010 Hardware
  • TRD/SCL importer for MB02+ and PROFI INTERFACEHi all MB02+ users, I know this time noone of you will be able to use my new program, because with MB02+ you will also need Velesoft's PROFI INTERFA…

    ... 128KB memory chips and 1 capacitor.

    Further info about ...
    Hood Hood April 2010 Development
  • My 1st CPLD project using the Xilinx XC9536Title says it all - for those of you who are considering the use of a CPLD or FPGA (programmable logic) in your electronics ventures, I've documented…

    ... minimize supply pins -> decoupling capacitor(s) distance, and choose good ...
    RetroTechie RetroTechie April 2010 Hardware
  • Quiet ZX Spectrum Issue 3We have a ZX Spectrum issue 3 where the volume is very low. The TR7 has been replaced, but to no effect. The speaker looks ok, but apart from swapp…

    If the speaker is definately ok, it surely must be the ULA. I'd be surprised if C35 is proven to be leaky if it's a ceramic disc, I don't think I've ever come across a leaky one. They are easily damaged though.
    alien8r33d alien8r33d May 2010 Hardware
  • 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…

    ... a nice big 30V electrolytic capacitor between -V and +V, that ...
    bleugh bleugh May 2010 Chit chat
  • 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…

    ... . Do you have a decoupling capacitor on the input to the ...
    Spex Spex May 2010 Chit chat
  • 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…

    ... . Do you have a decoupling capacitor on the input to the ... [/QUOTE]

    No decoupling capacitor.

    I've tried ...
    Scottie_uk Scottie_uk May 2010 Chit chat
  • 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…

    ... DC blocking cap, i.e. capacitor coupling. Get a highish value ...
    alien8r33d alien8r33d May 2010 Chit chat
  • +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…

    ... ; you could cut out the capacitor that mixes audio and video ...
    Zup Zup May 2010 Hardware
  • Help, How to RGB to VGA Connector on +2A ?Hi, How would I go about converting the RGB output connector from ZX Spectrum +2/A to VGA type of connector. I found this device [url]http://www.am…

    ... ) are the sign for a capacitor of 1 nF they are ...
    ingo ingo 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…

    ... 's) and an in-line capacitor (swedish version I think). I ...
    joefish joefish 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…

    ... (390 Ohm) via a large capacitor, then such load (loudspeaker?) could ... show. The use of the capacitor would prevent disturbing the DC ... would advice a good (large) capacitor in series.
    My opinion ...
    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…

    ... 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
  • 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…

    ... /> In that case, surely a capacitor in series with the output ...
    Winston Winston 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…

    ... ]In that case, surely a capacitor in series with the output ...
    ingo ingo June 2010 Hardware
  • Some ROM/EPROM questions...I've got a ZX Spectrum +, a +2A and +3 computers, and I've been using +3e project ROMS for a while in my +3. I was thinking about using an EEPROM or…

    ... chosen values). Add a small capacitor to that, and you should ...
    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…

    ... the culprit ? My clumsiness, some capacitor expired, or the infamous video ...
    Cignale Cignale June 2010 Hardware
  • So you need to double (or triple, or quadruple) the clock speed...No particular reason for posting this, other than I was looking at an eZ80 evaluation board that does this, and that jogged my memory of a project I'…

    Reverse the polarity on the flux capacitor and get it up to 88mph ;)
    merman merman 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…

    ... results) you should remove that capacitor (C31 = 20pF) that adds the ...
    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…

    ... were 4 diodes and a capacitor... No reostate (I hope this ...
    guesser guesser June 2010 Hardware
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Latest Posts

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    John Elliott on April 21
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    rich_chandler on April 21
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    mel the bell on April 21
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