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Search Again :: Adv Search 184 results in 0.000s
<1234567>
  • 12V ripple with lower ram installedI repaired a speccy this week. Before doing anything I replaced all caps and measured the transistors in the power section. When doing this I found t…

    ... there is a light blur (ripple) to it that wasn't ... inserting the last few the ripple starts to occur. I tried ...
    patzik patzik April 2016 Hardware
  • Just got a Spectrum +2BThis is the first Spectrum I've ever used or owned. I got it without a video cable or power supply. I wired up a proper video cable, and I altered an…

    ... have to build a simple "ripple filter" circuit to solve this ... machine by not using this ripple filter in the meantime?
    papa_november papa_november February 2007 Hardware
  • grrr The Capacitor PlagueI'm getting fed up of The Capacitor Plague. If you don't know what this is, I'll tell you the result. Your computer stops working. Sometimes, it won'…

    ... smooth, but has lots of ripple. It causes the chips on ...
    Winston Winston January 2009 Chit chat
  • 48K misplaced coloursHello to everybody! Slowly recapping a otherwise working Issue 6A 48K. All new caps aroud LM1889, 7805 and DC-DC converter, which improved ripple an…

    ... DC-DC converter, which improved ripple and noise quite a bit ...
    Falco-F8L Falco-F8L September 2014 Hardware
  • Issue 3B woesHello there, I currently have a Issue 3B for repairs around, it used to have broken upper and lower RAM, which I replaced with 41256-120 DRAMs (hac…

    ... .1V & 12V with no ripple (didn't measure the -5V ...
    Shockwav3 Shockwav3 November 2015 Hardware
  • Composite video ghost image on ZX Spectrum 128K +2Hi, I have a ghost image on the composite video out on my ZX Spectrum 128K +2 and have run out of ideas of what could be wrong. Does anybody have a…

    ... 12V input with no obvious ripple.
    - diodes D1 to D11 ...
    pdj102 pdj102 September 2016 Hardware
  • ZX Spectrum Issue 4S composite video fuzzy (horizontal blur)Dear people of WoS, Thank you very much for taking the time to read. I have an Issue 4S I recently acquired and planned to fix up as a gift for a…

    ... %
    Measured regulator 5v for ripple
    Piggy backed with new ...
    handsfelloff handsfelloff January 2018 Hardware
  • Fixing a poorly Issue 3 - Odd faults.Here's one for you Spectrum fixers, I warn you it's a long one. I've spent a couple hours this evening doing several repairs on a rubber keyed Speccy…

    ... theres something still causing dc ripple still somewhere.

    At ...
    Your Spec-chum Your Spec-chum July 2018 Hardware
  • Power supply voltage regulator circuitRelating to [url="https://www.worldofspectrum.org/forums/discussion/56142/"]this topic[/url] I have managed to acquire this little accessory, which I…

    ... could be doing anything else (ripple suppressor perhaps?)

    I ...
    Renegade Renegade June 2019 Hardware
  • spectrum48k power supply?Hello, I live in the U.S. and I need to get a power adapter for the spectrum 48k comparable to the original. I needed to know all the specifications…

    ... no frecuency appears (except the ripple) if you talk about the ...
    Anonymous Anonymous December 2001 Sinclair Miscellaneous
  • Will Spectrum run @ 60Hz?Sorry to overlap w/ my other recent post, but want to know, if I grab a Spectrum and use it in America with a voltage converter or a different power …

    ... times larger due to reduced ripple. So instead of average 9V ... figure offhand). So these minor ripple, mains voltage variation things matter ...
    Alcoholics Anonymous Alcoholics Anonymous November 2004 Sinclair Miscellaneous
  • ADCI'm a little confused about how the Z80 manages the ADC instruction. I'm assuming two ADD instructions are performed (am I wrong?!) I can think of 3 …

    ... this way is called a ripple-carry adder; it's slow ...
    Alcoholics Anonymous Alcoholics Anonymous February 2005 Development
  • What's on your desktop?I have the ZX Spectrum +128K booptscreen on mine.

    Just one of the Windows XP defaults. At the moment I have Ripple, sometimes I go for Crystal. Boring perhaps, but I don't like having photos as my desktop wallpaper. I think it looks too messy.
    MattLamb MattLamb May 2005 Chit chat
  • Spectrum +3 Powered off a PC???Hiya Quick question. Is it possible to power a +3 from a PC power supply? as in, make or buy an adaptor? or some other method. Want to mount a +3 …

    ... deal with the power ripple issues. The ripple problem was easy to ...
    dasteph dasteph September 2005 Sinclair Miscellaneous
  • Games with rippling water effectI have seen this effect of animated water in one or two games and want to try something similiar but can't remember which games. Can anyone suggest s…

    Just watched Losing Victoria. The ripple effect is really impressive. Well done Gasman. :)

    Is it a true story I wonder? :)

    Necros.

    T-23
    Ian Hamilton Ian Hamilton April 2006 Games
  • Games with rippling water effectI have seen this effect of animated water in one or two games and want to try something similiar but can't remember which games. Can anyone suggest s…

    ... ]Just watched Losing Victoria. The ripple effect is really impressive. Well ...
    gasman gasman April 2006 Games
  • Google VideoHaving upgraded my linux boxes, I can now use Google Video. Any Spectrum-related stuff I shouldn't miss? (I've already searched for "sinclair" and "…

    ... take a few days to ripple into the search engine.
    NickH NickH June 2006 Chit chat
  • Noisy 2A displaymy 2A gives a fairly good display until it has to generate sound or other cpu work, which interferes with the signal, giving some "cloudy" effects …

    ... BC237 transistor. It's a ripple filter, when the power drops ...
    dasteph dasteph July 2006 Hardware
  • Noisy 2A displaymy 2A gives a fairly good display until it has to generate sound or other cpu work, which interferes with the signal, giving some "cloudy" effects …

    ... said that you had no ripple etc on the supply, but ...
    DEATH DEATH July 2006 Hardware
  • Noisy 2A displaymy 2A gives a fairly good display until it has to generate sound or other cpu work, which interferes with the signal, giving some "cloudy" effects …

    Yes thats right. Basicaly it?s the same setup as the last Cap mod, only in the version shown at the web page I?ve move the ripple fillter to the power supply rather than mounting it inside the Spectrum.
    dasteph dasteph July 2006 Hardware
  • replacement +3 psuok, who would be kind enough to help an idiot build a replacement PSU for the +3 / +2a , from a PC power supply? Guesser has already helped out a gr…

    ... these problems I used capacitor ripple filters on both the 5v ... Spectrum with also employs the ripple filters, I didn’t muck ...
    dasteph dasteph September 2006 Hardware
  • replacement +3 psuok, who would be kind enough to help an idiot build a replacement PSU for the +3 / +2a , from a PC power supply? Guesser has already helped out a gr…

    ... 've never considered using a ripple filter on a PC supply ... /> I wouldn't have thought ripple would be a problem, especially ...
    DEATH DEATH September 2006 Hardware
  • replacement +3 psuok, who would be kind enough to help an idiot build a replacement PSU for the +3 / +2a , from a PC power supply? Guesser has already helped out a gr…

    ... ]I wouldn't have thought ripple would be a problem, especially ... idea for the filter. The ripple problem only became apparent because ...
    dasteph dasteph September 2006 Hardware
  • Byter and U.F.O. by Protek?Who says these are available for the Speccy? I've often wondered where this info comes from - any info I've seen shows these as available for the ZX-…

    ... , again without much of a ripple... I'm gonna be a ...
    Gilby Gilby October 2006 MIA/STP/SDP
  • voice sampling with ADCs and DACsHi sorry it's off topic, but I wonder if anyone can help with an electronics problem. I'm trying to build a project for A-level electronics, using an…

    ... input power source clean and ripple free? (A small lead acid ... and free of mains frequency ripple)

    Are you sure ...
    Winston Winston November 2006 Hardware
  • problem with sinclair zx 48 issue 6aHi all, I have the following problem when I turn on my sinclair without rom inserted. [url]http://217.79.64.145/sinclair/5.jpg[/url] when I turn o…

    ... you won't see any ripple the supplies might have (again ... is needed to see if ripple is a problem).

    Marcelo Marcelo January 2007 Hardware
  • Just got a Spectrum +2BThis is the first Spectrum I've ever used or owned. I got it without a video cable or power supply. I wired up a proper video cable, and I altered an…

    Nice one.

    The ripple filter will fix the scrambled ... an ATX supply, but the ripple filter is identical for use ... [/URL] for details on the ripple filter I made for a ...
    dasteph dasteph February 2007 Hardware
  • Just got a Spectrum +2BThis is the first Spectrum I've ever used or owned. I got it without a video cable or power supply. I wired up a proper video cable, and I altered an…

    ... AT supply would need a ripple filter - I kind of assumed ... supply...

    But a ripple filter is often merely a ... the low parts of the ripple from the rectifier (AC, from ...
    Winston Winston February 2007 Hardware
  • Just got a Spectrum +2BThis is the first Spectrum I've ever used or owned. I got it without a video cable or power supply. I wired up a proper video cable, and I altered an…

    ... trouble. In this case a ripple filter is the easiest option ...
    dasteph dasteph February 2007 Hardware
  • TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…

    ... a scope, try checking for ripple in the power lines. That ...
    Marcelo Marcelo March 2007 Hardware
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