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<1…17181920212223…34>
  • Does anyone still have the same speccie?The survey into the Games of the Year - and the question about what system you were playing 20 years ago - got me thinking. Has anyone on the forum …

    ... I binned three tatty 48K rubber key models in 1994 ... I also bought a 48K rubber key from ebay but ... very little time for 48K Spectrums since the launch ... of the last sold 48K rubber key models did ... hours together although the power supply exploded so I am ...
    ASM ASM March 2013 Games
  • Multiface +3 AdviceHi, New to the forum after resurrecting my +3 and looking for a bit of advice on the Multiface 3 please. Quite simply is it worth investing in for…

    ... -5-DISK-DRIVE-RIBBON-CABLE-POWER-SUPPLY-/121075507228[/URL]


    48K games
    and
    ... 128K games

    48K games are easiest to convert ... SNA2DSK you can convert every 48K game - even those ...
    ikci ikci March 2013 Hardware
  • Improving Composite Output of 48K SpectrumI've been playing around with this Spectrum 48k I got inside a dK'tronics keyboard, because well I've already got two working other ones so why not..…

    ... ][B]+12V Power Rail[/B][/U]

    As the +12V supply comes ... from a switch mode power supply, a filter ... 0V). Because of the single power rail, the circuits cannot ... typically approx. half the supply voltage). Think of the ...
    1024MAK 1024MAK March 2013 Hardware
  • WAV'sOk so i have used tap2wav to get my audio file on my pc , I get 10 of my favourite games in a folder , I then use the mp3 cassette adapter which i pl…

    ... 8 Ohm speaker. The actual power output of the amp is ... if it runs on a 12V dc supply. Typically a 2W to ...
    1024MAK 1024MAK April 2013 Hardware
  • 48k + Spectrum Issue 4S Display IssueHi all! Brand new user here. Growing up I had a zx spectrum for a little bit, and recently I have bought a working 48k + Spectrum (Issue 4). I was…

    ... load. Either by cutting the power supply lines (-5, +12) running ... After disconnecting the load, the power convertor can be repaired and ... measuring the resistance between the power pins and gnd).
    ... having a voltmeter attached to +12V (or -5V), and switching ...
    roko roko April 2013 Hardware
  • 48k + Spectrum Issue 4S Display IssueHi all! Brand new user here. Growing up I had a zx spectrum for a little bit, and recently I have bought a working 48k + Spectrum (Issue 4). I was…

    ... load. Either by cutting the power supply lines (-5, +12) running ... /> After disconnecting the load, the power convertor can be repaired and ... having a voltmeter attached to +12V (or -5V), and switching ... happen to buy a bench power supply today so I'll limit ...
    deadeye deadeye April 2013 Hardware
  • 48k + Spectrum Issue 4S Display IssueHi all! Brand new user here. Growing up I had a zx spectrum for a little bit, and recently I have bought a working 48k + Spectrum (Issue 4). I was…

    If you power it up now you should ... able to measure the 5v, 12v and -5v supplies on any ... is -5v, pin 8 is 12v, and pin 9 is 5v ... have a fault on your power supply circuitry, or a short somewhere ...
    guesser guesser April 2013 Hardware
  • 48k + Spectrum Issue 4S Display IssueHi all! Brand new user here. Growing up I had a zx spectrum for a little bit, and recently I have bought a working 48k + Spectrum (Issue 4). I was…

    ... ;697100]OK, set the bench power supply to 9V, 1.4A
    The feedback circuit that stabilizes +12V is obviously not working. Either ...
    Falco-F8L Falco-F8L April 2013 Hardware
  • 16 colours on a Timex Sinclair 2068I'm putting a few videos up on YouTube, the first one shows the colours on the TS2068. [url]https://www.youtube.com/watch?v=1tJ1qIMcTUE[/url] Brigh…

    ... channel 3 circuit ever receive +12V so they do not oscillate ... the loudspeaker, is that the power supply on the TS2068 is incredibly ...
    rga24 rga24 May 2013 Hardware
  • Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…

    ... (74LS164) and acts a supply voltage dropper. When the interface ... an external case with a power supply. With my new construction, ... have mounted my Issue 2/48k board, a small motherboard ... Gush interface, Disc Drive and power supply in an old Olivetti terminal ...
    Pierre Pierre May 2013 Hardware
  • Is This PSU Useable on the Speccy?I just got my Speccy and the PSU has had some 'work' done to it. Somebody has added an extra length of cable on it but rather than soldering or crim…

    ... . I have measured up to 12V as the old technology of ... the unit show 1.5A @ 12V, thus calculated at 18W and ... forgiving with a bad external power supply as most of the regulation ...
    Pierre Pierre May 2013 Hardware
  • Yet another glitchy graphics 48kHeyo, I'm new both to the forums (sorry if this is the wrong forum) and to Spectra I'm afraid, picked up a 48k from a steam fair sale thingy (not th…

    ... />
    [QUOTE=CaptainHayashi;701778]The power supply appears to have been DoA ... that to fit into the 48k? :o


    ... though)[/QUOTE]

    The 48K doesn't output sound through ... static is completely normal. The 48K came with free echo-from ...
    RobeeeJay RobeeeJay May 2013 Hardware
  • Yet another glitchy graphics 48kHeyo, I'm new both to the forums (sorry if this is the wrong forum) and to Spectra I'm afraid, picked up a 48k from a steam fair sale thingy (not th…

    ... test voltages on a 16K, 48K or plus Speccy, fit the ... voltages.

    The main power supply line in the Spectrum is ...
    1024MAK 1024MAK May 2013 Hardware
  • Spectrum 48k PSUHi, can anyone suggest an alternative off the shelf power adapter that will be compatible with the ZX Spectrum 48k? I've just picked an old machin…

    [U][B]ZX Spectrum Mains Power Supply Units[/B][/U]

    ... ratings:

    Sinclair 16K / 48K / Plus
    9V DC at ... .4A
    2.1mm DC power plug wired centre neg, outer ... .1A
    2.1mm DC power plug wired centre neg, outer ...
    1024MAK 1024MAK May 2013 Hardware
  • Yet More Scottie UK Auctions.Still clearing my retro collection many items must go. Now selling games and in a few days I'll list some computers to. For now I have. [URL="http…

    ... .l2649"]Genuine Sinclair ZX Spectrum Power Supply[/URL]

    ... ;_trksid=p3984.m1555.l2649"]Power Supply (PSU) for Sinclair ... m1555.l2649"]Sinclair Spectrum 48k+ Style Power Supply (PSU) 9 volt ... _trksid=p3984.m1555.l2649"]Power Supply for Alphacom 32 ZX81, ...
    Scottie_uk Scottie_uk June 2013 Sales
  • Cascading transistorsMiguel (mcleod_ideafix) alerted me on an aspect of a design I'm working on where I am cascading transistors, which may give problems. This is the par…

    ... of how much time the power supply needs to stabilize, but it ... working:

    1. The power supply has to raise its voltage ... converter, begins to generate 12V and -5V supply rails to feed lower ... DC converter uses the +5V supply, so this stage cannot proceed ...
    mcleod_ideafix mcleod_ideafix June 2013 Hardware
  • wtf spectrum +2 only shorter ???Just seen this ZX Spectrum +2 but the casing is shorter...dare i say it, but is this a custom job ? [url]http://www.ebay.co.uk/itm/SINCLAIR-ZX-SPECT…

    The +2A, +2B and +3 do not have internal power regulator circuitry, the external power supply "brick" does all that and provides +12V, +5V and -12V supplies to the Speccy :smile:

    [I][B]Mark[/B][/I]
    1024MAK 1024MAK June 2013 Hardware
  • Spectrum +2(grey) rf problem not tuning inHi lads, first of all a quick intro. Im a speccy enthusiast in Ireland, had my first speccy when i was seven in 1987(grey +2). Eventually it got repl…

    ... use a ZTX650 to simply supply a composite video signal, assuming ... in the 48K (and later grey +2) to handle the power supply oscillator ... it's similar to the 48K machine though, a BC547 is ...
    DEATH DEATH July 2013 Sinclair Miscellaneous
  • Which is the most unusual/bizarre peripheral you have for the Spectrum?For me, I think it's the British Micro Grafpad. [url]http://www.worldofspectrum.org/hardware/feat10.html[/url]

    ... keyboard stickers to show all 48k keywords. The joystick ports are ... is supplied by an ATX power supply. I got already a Slim ...
    Speccyman Speccyman July 2013 Hardware
  • Why is the B Disk interface selling for so much on ebay?I often watch unusual interfaces that pop up on ebay, and I noticed that this B Disk interface just went for ?113: [url]http://www.worldofspectrum.or…

    ... /> - Do Betadisk 128 work with 48k computers?[/QUOTE]

    No ... people say they work in 48K ode if you use a ... important you use a separate power supply for the B: drive too ... isn't strong enough to power two drives, regardless of what ...
    DEATH DEATH July 2013 Hardware
  • Why is the B Disk interface selling for so much on ebay?I often watch unusual interfaces that pop up on ebay, and I noticed that this B Disk interface just went for ?113: [url]http://www.worldofspectrum.or…

    ... people say they work in 48K ode if you use a ... important you use a separate power supply for the B: drive too ... isn't strong enough to power two drives, regardless of what ... it would reset you to 48k basic. I usually preempted that ...
    Macc Macc July 2013 Hardware
  • Issue 2 crashes after about 30 minsHi Guys, I have an Issue 2 zx spectrum that seems to get graphic corruption after about half hour of playing, then finally falls over and crashes. …

    ... load with joystic interface 10.12V


    So looks ... issue 2 with an overvolting power supply. Only one thing to try ...
    gazj82 gazj82 July 2013 Hardware
  • Issue 2 crashes after about 30 minsHi Guys, I have an Issue 2 zx spectrum that seems to get graphic corruption after about half hour of playing, then finally falls over and crashes. …

    ... to operate from 7.5 - 12V to allow for the load ... 'm not using a bench power supply, I usually use a simple ... an on/off switch and power on LED. It produces approx ...
    Zorn Zorn July 2013 Hardware
  • Issue 2 crashes after about 30 minsHi Guys, I have an Issue 2 zx spectrum that seems to get graphic corruption after about half hour of playing, then finally falls over and crashes. …

    ... /> The internal mini switch mode power supply in the Spectrum uses both ... to generate the -5V and +12V rails.

    Yes there ...
    1024MAK 1024MAK July 2013 Hardware
  • Keyboard has a life of its own?I just received a Spectrum+ Issue 4S, where I had to replace the MIC connector and I also did the Composite mod. So far it works just fine, but when …

    ... /> Have you done the standard power supply voltage tests?
    That is ... +12V supplies in the correct range.
    Is the +5V supply free ... the Spectrum disconnected from the power, measure and check the R65 ...
    1024MAK 1024MAK August 2013 Hardware
  • Barn Find #1Hi, just back from holiday and found a load of spectrum related bits in my folks old barn. They would probably have been a mates who dumped a load of…

    ... , I would not try and power it on unless all the ... involved in the internal +12v and -5v power supply generation have been checked ...
    balford balford August 2013 Hardware
  • ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…

    The diagram of the power supply section is [URL="http://www. ... feed a regulated, current limited +12V to the junction of R8 ... . This should power up the TEA2000 and the +12V feed to the ...
    1024MAK 1024MAK August 2013 Hardware
  • Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…

    ... />
    this harlequin is a 48k Spectrum clone that fits perfect ... as well as into a 48k+ case.
    It is made ... mA DC current from externals power supply. It remains cool!
    Video ... I ever saw on a 48k Spectrum. Tape input is realized ...
    ingo ingo August 2013 Hardware
  • ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…

    ... / TR9 power supply circuit, lets get an idea if the +12V supply line has ... isolator.

    Using your 12V regulated PSU, connect it to ... This should power up the TEA2000 and the +12V feed to the ... drop caused by the normal supply current.

    By ...
    1024MAK 1024MAK August 2013 Hardware
  • ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…

    ... on with the TR8 / TR9 power supply circuit, is to use your ... .
    Looking at a working 48K TR4, those are showing quite ...
    DenisM DenisM August 2013 Hardware
<1…17181920212223…34>

Latest Posts

  • I am currently watching.....
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