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<1…12131415161718…34>
  • Microdrive repair - GREAT NEWS!Microdrive repair facts: We know (almost) pure alcohol and cotton swabs are needed a lot to clean the Microdrive head. We know cartridges degrade, so…

    ... parts, so I did the electrolytic caps at the voltage regulator ... .JPG[/IMG]

    Old capacitors:
    [IMG]http://benophetinternet.nl ... .JPG[/IMG]

    New capacitors:
    [IMG]http://benophetinternet.nl ...
    bverstee bverstee September 2014 Hardware
  • Spectrum+2 Tape Deck Buzz<p>I've been messing&nbsp;with a Iss3 0500&nbsp;Spectrum +2. So far I've&nbsp;replaced the electrolytic&nbsp;capacitors, flipped the transistors, add…

    ... far I've replaced the electrolytic capacitors, flipped the transistors, added a ...
    retrogamemart retrogamemart June 2015 Hardware
  • Speccy 128k Toastrack capacitorsDoes anyone have a list of all the electrolytic capacitor values in a speccy 128k toastrack they could post...I've looked around and see plenty for …

    ... a list of all the electrolytic capacitor values in a speccy ...
    beanz beanz September 2016 Hardware
  • Harlequin Rev G - Decoupling Capacitors?Guys - I started assembling my Rev G Harlequin board over the weekend. Right after I picked it up and started loading parts, it struck me that there…

    ... just not that many decoupling capacitors on this board and the ...
    msansom msansom March 2017 Hardware
  • Improving RF-modulator outputMy old 48k is working perfectly, except for the RF-modulator output giving unclear colors, moire type effects - generally being a bit bad and driftin…

    Yeah the capacitors do tend to dry up, ... the various supply rails. New electrolytic caps should clear it up ...
    absorbentgnome absorbentgnome August 2005 Sinclair Miscellaneous
  • 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 …

    ... need to install some filtering Capacitors,before the power enters the ... need 2 2200uf / 16 vdc Electrolytic Caps, to filter the +12 ...
    dasteph dasteph September 2005 Sinclair Miscellaneous
  • Interface 1 electrolytic capacitorsInterface 1 has three 47&#956;F electrolytic capacitors. Is it necesary to replace them with fresh ones? I always do this with old speccys but is it…

    ... is imperative to change all electrolytic caps, specialy in speccys ... ... :smile: Surelly the capacitors you change in the Speccy ... with all those original Elect capacitors and it still works ... you are happy in changing capacitors... change, change ! ;)
    ...
    Gods Gods June 2007 Hardware
  • Voltage SchmoltageOk then. Don't flame for wanting to use a C64 tape deck for this - it was the only one I have to hand which may be cannibalised for the purpose. So …

    ... the circuit? Or do those electrolytic caps have quite a resistance ... is saying, kinda, is that capacitors don't actually conduct Direct ... through. In this case, the capacitors are going to be used ...
    DEATH DEATH July 2007 Chit chat
  • speccy 128 problemsHi everyone, first post on here, so first better say hello..hello :) Anyhow I just recently got back into gaming so a Speccy seemed just the thing t…

    ... a sure sign of the capacitors being on their way out ... for years.

    An electrolytic capacitor is made by having ...
    DEATH DEATH November 2007 Hardware
  • Of soldering and whatnot.So. It looks like if I'm going to have any sort of active retrogaming habit in the future, I need to learn a bit more about the nuts and bolts. Emula…

    ... megohms.
    - A selection of capacitors, electrolytic and ceramic. You can get ...
    Winston Winston February 2008 Hardware
  • 48K specs boots, but THEN blinking blocks!Of all ZX problems I have seen, the 'blinking blocks' is the most common... Today I picked up a 48K, it boots and THEN it locks filling the screen wi…

    ... problem - weak power supply, bad capacitors (causing excess ripple on the ... ripple is seen replace the electrolytic caps. Then start looking at ...
    Winston Winston May 2008 Hardware
  • Sinclair PC 200 - RF questionIs there any compatibility regarding the RF output of the sinclair pc 200? This week i got my 2nd unit and in both of them, when connected through R…

    ... not agree that these 2 capacitors will change the behaviour. They ... , for exmaple a 22µF electrolytic capacitor) to avoid signal limitting ...
    ingo ingo September 2008 Hardware
  • +2 grey PSU capacitor changeHi I opened up a +2 grey power supply (2.1A max output) unit in order to replace the aged electrolytic capacitor inside, just like I always do with …

    ... ripple, not filter spikes (an electrolytic cap isn't really all ... =3396938[/url]

    Two capacitors in parallel should be considered ...
    Winston Winston November 2008 Hardware
  • issue 2 board c34 getting hotHi All, Can anyone help with c34 getting hot very quickly? I`ve got an issue 2 board, there is no `buzz` from coil. yet the spectrum initalises to co…

    Capacitors should never get hot. But electrolytic ones do if they are put in with the wrong polarity. (Tantalum ones by contrast tend to explode).
    Winston Winston March 2009 Hardware
  • Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky

    ... in schematic), except output filter capacitors.

    When replacing DRAMs ... of the (22 nF) decoupling capacitors that go with them (C1 ... any decoupling capacitors: better replace 22nF with ~100nF ceramic, and electrolytic with ...
    RetroTechie RetroTechie April 2010 Hardware
  • Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …

    ... /> connecting a 4.7 uF electrolytic (perferably radial type) with
    Cignale Cignale July 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
  • Computer junkThought i start thread about this,after reading through the capacitor's thread it is true that components will exhaust themselves overtime,so for tho…

    ... a waste of capacitors

    taking an electrolytic cap above it ...
    guesser guesser October 2010 Chit chat
  • Powering up a Speccy after long-term storage.Staying at my folks for Christmas. Feels good to be back in God's country again, even if it is -12C outside at the moment. :-o Anyway, I was plannin…

    ... of inactivity, there could be electrolytic caps damaged. If caps at ... the computer and replace all electrolytic caps before applying power source ... at least the larger filter capacitors that go on the supply ...
    mcleod_ideafix mcleod_ideafix December 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…

    ... that case most probably the electrolytic decoupling capacitors around the video chip ... tell me exactly where these capacitors are on the board and ...
    joefish joefish January 2011 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…

    ... with the capacitors and diodes around it. Also the electrolytic capacitor alongside ... taking one of the smaller capacitors off another board and touching ...
    joefish joefish February 2011 Hardware
  • Fuzzy Screen On 48k Spectrum.Hi there. I bought a Spectrum off eBay last week (another for my collection lol), and it suffers with a fuzzy screen e.g. it looks like interference …

    ... anyone tried tantalum capacitors as replacements for the electrolytic caps? Are they ...
    JACK98 JACK98 February 2011 Hardware
  • 48K Issue 3, noisy display.Has anyone here experienced and been able to resolve a problem that looks like this: [URL="http://drizzle.zigg.net/ZX/ZX106-display.jpg"]Photogra…

    Replace the two capacitors on the far left of ... board (but prefferably replace all electrolytic caps).
    If that doesn ...
    gtsamour gtsamour February 2012 Hardware
  • 48K Issue 3, noisy display.Has anyone here experienced and been able to resolve a problem that looks like this: [URL="http://drizzle.zigg.net/ZX/ZX106-display.jpg"]Photogra…

    ... feeds LM1186. Check the new capacitors?[/QUOTE]
    It kept me ... removed one (or maybe both), electrolytic capacitor from the powerbrick.
    roko roko February 2012 Hardware
  • 48k PSU UpgradeCan anyone give the definitive word on a PSU upgrade (rather than just a replacement) for 48k machines? I'm thinking of adding at least an IDE inter…

    ... /> Would you use any decoupling capacitors in your design Johan? and ... 7805 reg with two 100uf electrolytic caps to enable it to ...
    napoleonblownaparte napoleonblownaparte May 2012 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... that there are 5 electolytic capacitors. But in the pcb there ... guess C9 or C8. These capacitors are not crucial in the ... the clock signal circuit is electrolytic.
    Anyway, putting a electrolitc ...
    Severino Severino February 2013 Hardware
  • The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…

    ... errors.

    About the capacitors on the disciple It seems ... this one has only one electrolytic, the one below the floppy ... , the other ones are "tantalum" capacitors, no polarity. Once I know ...
    Severino Severino March 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.…

    ... to the TV.
    Any electrolytic capacitor in series to the ... .7 (1) V. Therefore a (electrolytic) capacitor in series is not ... the video line by adding capacitors to ground normally also limits ... one can add (or change) capacitors between 5V and ground at ...
    ingo ingo April 2013 Hardware
  • issue 1 wire broken offHi there have just purchased a issue 1 zx spectrum 48k but there is a wire off on the underside of the board. It is from the ula one goes to the keyb…

    ... is normally the LM1889 or capacitors if you are unable to ... . Start by replacing all the electrolytic caps on the board.
    Pierre Pierre April 2013 Hardware
  • ZX Spectrum 48k Issue 2 Faulty Ram?Hi, I have a faulty ZX Spectrum Issue 2 motherboard. Looks in very tidy condition. Though I'm getting random columns of blocks and flashing cursors…

    ... of a beginner but these electrolytic caps, is there better replacement ... fairly recent threads where replacement capacitors were discussed in detail, including ...
    Zorn Zorn June 2013 Hardware
<1…12131415161718…34>

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  • Interface 1 electrolytic capacitorsInterface 1 has three 47μF electrolytic capacitors. Is it necesary to replace them with fresh ones?<br /> <br /> I always do this with old speccys bu…
  • Which capacitors are electrolytic?Hi! I'm refurbishing my 48k issue 6a, and as recommended by many (and not recommended by some) I'm going to replace the electrolytic capacitors. Mind…
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