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<1…24252627282930…34>
  • doubt about swapping ULA in an issue 2 boardIs it possible to swap a 6C001E-6 ULA type with a 5C112E ? I have this issue 2 board that is not booting, it shows me a black border with horizont…

    ... , the working machine has a diode/resistor mod on the Z80 ...
    gleegum gleegum September 2020 Hardware
  • Bit of fun - ToastRack , one change onlyAlthough there's an old "one change only" topic about, I was thinking about the toastyrack 128's earlier. Its actually the only Spectrum model I've n…

    ... ) DP switch fitted to the PSU allowing you to really turn ...
    spider spider November 2020 Hardware
  • Quirky nerdy hardware quiz time[b]Quirky nerdy hardware quiz time[/b] [list=1][*]How many transistors are on the issue one ZX Spectrum PCB? [color=#FFFFFF].[/color] [*]Which d…

    ... output of a Sinclair UK1400 PSU?
    [color=#FFFFFF].[/color]
    1024MAK 1024MAK December 2020 Sinclair Miscellaneous
  • ZX80 in a BoxAfter putting a [url="https://worldofspectrum.org/forums/discussion/57916/spectrum-in-a-box#latest"]Spectrum in a Box[/url] a while ago, I thought it…

    ... the ROM image and for switching between PAL and NTSC.
    xelalex xelalex December 2020 Hardware
  • Microdigital TK95 / TK90X - my experiencesAs asked for by Renegade [url="https://worldofspectrum.org/forums/discussion/58189"]here[/url] I'll do a short writeup of my experiences with my TK90…

    ... /> While I got an original PSU along those machines and was ...
    Shockwav3 Shockwav3 February 2021 Hardware
  • ZX Spectrum +2B 128K sound distorted and vertical jailbars. How to fix it?Hello, I have a ZX Spectrum +2B 128K (Issue 4 Motherboard) which suffers from sound distortion (the AY music is loud and distorted) and also very fa…

    ... that I already recapped the PSU and the unit itself.
    rfthunder rfthunder February 2021 Hardware
  • Pickles and Pearl 128kHi, After abandoning my game Pickles and Pearl in 2008, I did a bit of work in 2020 to make it 128k and have bank switching and music etc. I ha…

    ... it 128k and have bank switching and music etc.

    robpearmain robpearmain August 2021 Development
  • boot fail .. bad address lines A7,A12,A13anybody have any ideas what could be wrong with this specie issue 3B .. work done : removed rom, upper ram & logic put lower ram multiplexers in sock…

    ... in sockets, full recap, fitted switching regulator, z80 in socket (i ...
    mark8bit mark8bit August 2021 Hardware
  • More "What could have been"... The Z280.So in chasing up the Loki specs, I happened upon some parallel developments... And had Sinclair gotten to make the Loki, there could have been some i…

    ... would probably have supported task switching. Just to put that in ...
    cj7hawk cj7hawk September 2021 Hardware
  • Paging for 64Kb of Video Ram??? What is the best way to page this?Hi all, I'm just putting together a concept card for a "Loki" style of video card, which supports shadow ( so it fits a normal Speccy ) and also t…

    ... and a 48K superscreen, with switching between them possible? )

    cj7hawk cj7hawk October 2021 Hardware
  • Using a thermal camera to fix speccy's.Hi All, Thought I'd share another repair... Got a board that collapsed the bench supply straight away ( I run a bench supply and give it just enou…

    ... />
    So I check the diode, it's OK. Leave it ...
    cj7hawk cj7hawk December 2021 Hardware
  • Voltage/current meterToday I went to my local electronics shop and found this model of voltage and current meter, readily assembled with DC plugs at either ends... :P …

    ... +2 with a PS2 slim psu, hence the ~8,6 Volts ...
    Renegade Renegade December 2021 Hardware
  • After some graphics card recommendations please.Recently I've built myself a budget desktop, but have been wanting to get a more modern and better graphics card for it, but I'm not sure where to st…

    ... />
    A good 500 watt PSU

    I'm currently ...
    Your Spec-chum Your Spec-chum February 2022 Chit chat
  • I just bought a second hand BBC MasterI have had the notion for a while to get myself a old Beeb - maybe a scrappy one and fix it up - recap its PSU or whatever. Well I gave in yesterday …

    ... fix it up - recap its PSU or whatever. Well I gave ...
    dmsmith dmsmith September 2022 Chit chat
  • PSI ChessHi, Anybody out there remember the game "PSI Chess" by The Edge? Well, there seems to be no problem finding a snapshot ot tape image for this game …

    ... again.


    3. SWITCHING MODES

    You can ...
    Ed Ed February 2002 Games
  • Kempston InterfacesWhat Kempston Interfaces featured an additional expansion port on the back, so that you could fit other devices on, such as the Currah microspeech et…

    ... , you could also build a switching one. Is it easy to ...
    Alessandro Tommasi Alessandro Tommasi January 2002 Sinclair Miscellaneous
  • spectrum problemshello, I just recieved a spectrum 48k on ebay [img]/__forums/images/smiles/icon_smile.gif[/img] (I live in the U.S.) I have a transformer to conver…

    All you needed was a PSU that is 9V DC 1.4A or more regulated, -ve centre polarity.
    Anonymous Anonymous January 2002 Sinclair Miscellaneous
  • spectrum problemshello, I just recieved a spectrum 48k on ebay [img]/__forums/images/smiles/icon_smile.gif[/img] (I live in the U.S.) I have a transformer to conver…

    ... the input of the Spectrum PSU and at the output.
    Or try another PSU like Fraser said. Be carefull ... to use a negative centre PSU or the spuctrum will suffer ...
    Anonymous Anonymous January 2002 Sinclair Miscellaneous
  • spectrum problemshello, I just recieved a spectrum 48k on ebay [img]/__forums/images/smiles/icon_smile.gif[/img] (I live in the U.S.) I have a transformer to conver…

    the voltages are:
    the transformer puts out about 216V.
    the output of the original psu from sinclair(plugged into the transformer)is 12.83V under no load and I know the original psu is unregulated
    thoma thoma January 2002 Sinclair Miscellaneous
  • spectrum problemshello, I just recieved a spectrum 48k on ebay [img]/__forums/images/smiles/icon_smile.gif[/img] (I live in the U.S.) I have a transformer to conver…

    ... in the spectrum, not the PSU or the transformer. If you ... spectrum probe to connect his PSU in your spectrum. If now ... alive.
    Or try another PSU and see what happen (remember ...
    Anonymous Anonymous January 2002 Sinclair Miscellaneous
  • 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…

    Only a regulated PSU is suitable. 1.4A is meant to be enough for spectrums with add-ons so slightly less might do. How are you going to connect it to a tv?
    Anonymous Anonymous December 2001 Sinclair Miscellaneous
  • 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…

    ... , if you have the original PSU use a transformer to convert ...
    Anonymous Anonymous December 2001 Sinclair Miscellaneous
  • [newbie warning :)] Spectrum +3 questionsHello all, Yes, I am a Speccy newbie [img]/__forums/images/smiles/icon_smile.gif[/img] My Spectrum +3 arrived today, and I already have a few questi…

    ... with the innards of the PSU - if you need a dumbproof ...
    cyborg cyborg November 2001 Sinclair Miscellaneous
  • [newbie warning :)] Spectrum +3 questionsHello all, Yes, I am a Speccy newbie [img]/__forums/images/smiles/icon_smile.gif[/img] My Spectrum +3 arrived today, and I already have a few questi…

    ... the various +3 connectors inc. psu & floppy B:

    David David November 2001 Sinclair Miscellaneous
  • [newbie warning :)] Spectrum +3 questionsHello all, Yes, I am a Speccy newbie [img]/__forums/images/smiles/icon_smile.gif[/img] My Spectrum +3 arrived today, and I already have a few questi…

    ... asked for a PC PSU to +3 PSU for taking it to ...
    Anonymous Anonymous November 2001 Sinclair Miscellaneous
  • [newbie warning :)] Spectrum +3 questionsHello all, Yes, I am a Speccy newbie [img]/__forums/images/smiles/icon_smile.gif[/img] My Spectrum +3 arrived today, and I already have a few questi…

    ... needed data to build a PSU (I won't build it ... willing to sell me a PSU...

    So what should ... I do? Buy an original PSU or trying to build one ...
    Anonymous Anonymous December 2001 Sinclair Miscellaneous
  • Anyone will buy the sprinter? spectrum AT motherboard?take a look: <a href="http://virtuals.atlant.ru/peters/index.htm Looks" target="_blank">[url]http://virtuals.atlant.ru/peters/index.htm[/url] Look…

    I was thinking of mounting it in an external dual scsi 5.25 case. but it was to small. Otherwise it would have looked cute.

    It should not be too hard to mount it up in a small flex atx case if you have an AT PSU.
    erkan erkan July 2001 Sinclair Miscellaneous
  • spectrum mode smiilar to c64?i dont know much about machine code assembler routines, zilch actually to be honest, ive always fiddled with basic on my spectrum, only doing maybe a…

    ... the other side, because the switching of screen can be done ...
    LCD LCD July 2001 Sinclair Miscellaneous
  • spectrum mode smiilar to c64?i dont know much about machine code assembler routines, zilch actually to be honest, ive always fiddled with basic on my spectrum, only doing maybe a…

    ... Laced Graphic you mentioned by switching really quickly let's say ...
    tommt tommt July 2001 Sinclair Miscellaneous
  • SPECCY+2 110V POWER SUPPLYI live in the USA and I bought a ZX Spectrum 128k +2 in eBay.com. The problem is that i don't know how to turn it on. All the major US appliances use…

    ... end of the +2A/+3 PSU lead looks like (which is ...
    Keith Coles Keith Coles April 2001 Sinclair Miscellaneous
<1…24252627282930…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
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    John Elliott on April 21
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