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  • +2B/+3 flash boardsAfter a recent surge in demand there are now only three of these boards left* from the batch I had made. Once they're gone they're gone unless I can …

    Just to say I got it hooked up and working today, thanks guesser

    Just wondering what other mods to make on the +3 I just bought... added a resistor to R44 to make the RGB SCART work on my telly so far...
    smogit smogit November 2011 Sales
  • Datel plusD set up, with drive, discs, instructions etcPreviously one of the crown jewels of my collection, imminent baby means I need the money more! If you're looking at this you likely know what it i…

    when i got my datel plus d kit the only thing that was missing was the fixer board lol
    even if it dont work its not like i couldnt fix it as its only a resistor and a few line changes
    djgarf djgarf November 2011 Sales
  • ZX81 Dark screen, could it be the ULA?Trying to get a ZX81 going for a mate of mine, already replaced the membrane (Cheers Rich!) but now its the old "very dark screen" problem, probably …

    ... to PAL by disconnecting a resistor on one of the ULAs ...
    gtsamour gtsamour November 2011 Chit chat
  • Spectrum +3 and Commodore 1084S-D1Hi everybody, I know, we already talked about this here, but I still have the problem and cannot find the solution. I just bought a video cable from…

    ... one PSU and remove a resistor from the CSYNC line.
    RobeeeJay RobeeeJay December 2011 Hardware
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... Issue 2 has had the resistor value change and additional capacitor ...
    Zorn Zorn December 2011 Hardware
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... 's select signal comes from! (resistor or gate)
    RetroTechie RetroTechie December 2011 Hardware
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... in parallel with the input resistor. I suspect adding lowish value ... resistor before the input may help.< ...
    Zorn Zorn December 2011 Hardware
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... accessing the lower 16K. The resistor decoupled the z80 from /RAS ... , but seemingly enough! Thus the resistor was removed.
    csmith csmith December 2011 Hardware
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... modified the power supply circuit (resistor change and addition of a ...
    Zorn Zorn December 2011 Hardware
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... the RAS, unless the coupling resistor was too small. Also with ...
    csmith csmith December 2011 Hardware
  • Spectrum +3, Issue 2...I have just had plonked on my desk a nice issue 2 Spectrum +3. I'm not sure if its 100% working yet, as I have not plumbed it into a telly. So, assu…

    There was a "one resistor" fix I've seen floating ... just adds the 220 ohm resistor between the emitter of TR5 ...
    guesser guesser December 2011 Hardware
  • Spectrum +3, Issue 2...I have just had plonked on my desk a nice issue 2 Spectrum +3. I'm not sure if its 100% working yet, as I have not plumbed it into a telly. So, assu…

    ... ;587562]There was a "one resistor" fix I've seen floating ... just adds the 220 ohm resistor between the emitter of TR5 ...
    Chinners Chinners December 2011 Hardware
  • faultyi have a zx48 that will not tune in it allways seems to be just out of tune what could cause this fault also half of the keyboard doesnot work there …

    ... should be a 56 ohm resistor as far as I can ...
    guesser guesser December 2011 Hardware
  • 128 Heatsink Machine UpgradesThe title says it all - anything I can do to upgrade this machine? Thanks. I already have a PlusD and a DivIDE +..

    ... matched the beeper (remove a resistor), sorted the RGB socket so ...
    RobeeeJay RobeeeJay January 2012 Hardware
  • 128K sound balanceHello knowledgable-type people, I'm trying to get the best sound on this 128K+ toastrack, using RGB. I've tried using the normal MIC socket. It work…

    ... . If you attach a variable resistor across R115 and dial it ...
    Spirantho Spirantho January 2012 Hardware
  • speccy sound input sensivityis there a way to increase sound input sensivity of 48K spectrums? As most of us trying to transfer tape files to spectrum via our onboard soundcard…

    ... on +3, by removing a resistor. Is there a way to ... was actually to put a resistor over a pair of diodes ...
    guesser guesser January 2012 Hardware
  • speccy sound input sensivityis there a way to increase sound input sensivity of 48K spectrums? As most of us trying to transfer tape files to spectrum via our onboard soundcard…

    ... to peak.
    Removing a resistor you can also risk the ...
    ingo ingo January 2012 Hardware
  • Transferring +3 Disk Image from PC to real +3Is there a way to do this without physically connecting the +3 disk drive to the PC? Something like a Speccy version of the "Xfer in C" utility for…

    ... done to the motherboard: (220k resistor added to a transistors emitter ...
    PitfallJones PitfallJones January 2012 Sinclair Miscellaneous
  • Please help! connecting speccy to a new style digital TVHi- I've been emulating for years but have just bought a real 48k Speccy to get that 'real' feeling of my youth (and to play my home programed games …

    ... a little circuit with a resistor and a transistor, this is ...
    Winston Winston January 2012 Hardware
  • Making a Zx Spectrum betterIs there anyway to make my Grey ZX Spectrum more power efficient and more reliable from the original you get. What I mean is we all know the ZX Spec…

    ... you from using a small resistor and two of them in ...
    Zetr0 Zetr0 January 2012 Hardware
  • Faulty rubber speccy - advice neededHello all speccy hardware gurus :) Recently I moved to a new flat and after a long time have some space (and time) to dig out my old Speccy hardware…

    ... bus via a resistor R2. I checked that resistor again and ... get a better reading on resistor legs, it moved a ... in the middle of the resistor! I must have broke ... of the legs of the resistor.

    So ... and hope that the cracked resistor was the only problem ...
    deckard deckard January 2012 Hardware
  • Faulty rubber speccy - advice neededHello all speccy hardware gurus :) Recently I moved to a new flat and after a long time have some space (and time) to dig out my old Speccy hardware…

    ... . I hope that replacing that resistor and fitting a new 4116 ...
    deckard deckard January 2012 Hardware
  • Faulty rubber speccy - advice neededHello all speccy hardware gurus :) Recently I moved to a new flat and after a long time have some space (and time) to dig out my old Speccy hardware…

    ... . I hope that replacing that resistor and fitting a new 4116 ...
    Turrican Turrican January 2012 Hardware
  • ZX Spectrum 128K composite video fixes in 1 documentI just finished my document with video fixes and improvements for all ZX Spectrum 128K models. Download it here: [URL="http://benophetinternet.nl/ho…

    ... would prefer to insert a resistor of about 100 Ohm if ...
    ingo ingo January 2012 Hardware
  • ZX Spectrum 128K composite video fixes in 1 documentI just finished my document with video fixes and improvements for all ZX Spectrum 128K models. Download it here: [URL="http://benophetinternet.nl/ho…

    ... would prefer to insert a resistor of about 100 Ohm if ... already fed through a 1k resistor so shorting out isn't ...
    guesser guesser January 2012 Hardware
  • Which kempston joystick schematic is the best?I'm looking for the best Kempston Joystick interface schematic. It has to be as cheap as possible. But it must be as compatible as possible. I've c…

    ... via resistors (can be used resistor net, type B) 120 Ohm ...
    velesoft velesoft February 2012 Hardware
  • 4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…

    ... /> Edit: The /MREQ delay. 220R resistor in series, followed by 47pf ...
    csmith csmith February 2012 Hardware
  • divIDE x Spectrum clonesAnyone has a Spectrum clone and did a test with divIDE? Here in Brazil we have 2 Spectrum clones (TK90X and TK95) that are almost 95-99% compatible w…

    ... DivIDE board and connect via resistor:
    [img]http://velesoft.speccy ...
    velesoft velesoft February 2012 Hardware
  • divIDE x Spectrum clonesAnyone has a Spectrum clone and did a test with divIDE? Here in Brazil we have 2 Spectrum clones (TK90X and TK95) that are almost 95-99% compatible w…

    [QUOTE=velesoft;603957]Second pin must be disconnect from DivIDE board and connect via resistor:
    [img]http://velesoft.speccy.cz/zx/tk90x/tk90x_divide3.JPG[/img][/QUOTE]

    Why is that resistor needed?
    Encarnado Encarnado February 2012 Hardware
  • divIDE x Spectrum clonesAnyone has a Spectrum clone and did a test with divIDE? Here in Brazil we have 2 Spectrum clones (TK90X and TK95) that are almost 95-99% compatible w…

    ... =Encarnado;604029]Why is that resistor needed?[/QUOTE]

    MREQ ... is in TK90X connect via resistor with RESET to ULA chip ...
    velesoft velesoft February 2012 Hardware
<1…21222324252627…34>

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