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<1…16171819202122…34>
  • Ferguson MA20 via SCART to modern TVHello, I am a newbie here but I visit this forum on regular basis to find interesting informations about computers of my life - Speccies. I have a s…

    ... mentioned you will need to power the MA20 interface as it ... does not take any power from the Spectrum's edge ... to work with gave a 12V DC supply out on one of ...
    Womble Womble June 2012 Hardware
  • 4116 replaced by 4164 - "Noisy" paper?After I replaced my 4116's with 4164's and hooked them up to +5V, disconnected -5V and +12V, I have what looks like vertical lines in the paper, like…

    Sounds like a power supply related issue. Can you post ... a measurement of +5V and +12V (used by video encoder) would ...
    RetroTechie RetroTechie June 2012 Hardware
  • +2 OverheatingMust first give thanks to Dazza75 for supplying me a replacement +2 however it seems to be overheating and corrupting graphics in games making them u…

    ... am using is from a 48k+ so its only putting out ... /> [/QUOTE]

    Get a power supply that can provide enough ampheres ... to voltage dropping as the power supply reaches the limit of how ...
    Johan1973 Johan1973 June 2012 Hardware
  • Using an ATX power supply - Spectrum 48kOK... I have an Issue 3 48K model and the DC-DC converter does not work and I can?t make it work. :( There is a MOD to use an ATX power supply on the…

    ... the 4116 (the -5V and +12V) to not affect the results ... I think using an ATX power supply is good, too.
    Thanks ...
    Turrican Turrican June 2012 Hardware
  • Using an ATX power supply - Spectrum 48kOK... I have an Issue 3 48K model and the DC-DC converter does not work and I can?t make it work. :( There is a MOD to use an ATX power supply on the…

    ... the 4116 (the -5V and +12V) to not affect the results ... I think using an ATX power supply is good, too.
    Thanks ...
    Johan1973 Johan1973 June 2012 Hardware
  • Spectrum 48K help neededI hav got an old Specrtum 48K issue 3. When I plug-in power connector it doesn't show the home screen (c) Sinclair.... From about 50 times trying to …

    is it possibly your power supply?

    have you tested ... on eBay, just remember the 48k, 128k and 128k+2 are ...
    Zetr0 Zetr0 June 2012 Hardware
  • 48K and wavy lines.It seems all Spectrum related things are breaking here at casa de Don Pedro. After the problem with my old ZX81, I went over to my issue 2 ZX Spectru…

    Check capacitors in the power supply parts of the circuit. Unsmoothed crap on the 12V line might be the culprit.
    guesser guesser July 2012 Hardware
  • Some Spectrums and some software for saleHi all, I've been cleaning out my garage and found another bunch of Spectrum stuff for sale. [IMG]http://www.evilpaul.org/wp/wp-content/uploads/201…

    [QUOTE=flopping;645498]How much for the 48K and the +3?[/QUOTE]

    Just tried the 48k and it's dead :(

    +3 is ?19 including postage. It comes with power supply and RF lead. Haven't tested the drive - I have no disks. Interested?
    evilpaul evilpaul August 2012 Sales
  • THE VOLTAGE OF THE POWER SUPPLY UNITCould anybody who has a ZX Spectrum 128k +2 count with a voltameter the voltage which the power supply unit gives to the Spectrum and tell me the [B]…

    ... an unregulated capacitor smoothed dc supply:

    [ ... br /> [*]variations in mains supply voltage (#1)
    ... power supply, and/or between different power supply units
    (#2) applies between different power supply ... load is less than 12V) and the PSU ...
    1024MAK 1024MAK August 2012 Hardware
  • Just bought a Spectrum+. Doesn't work. Red bars on screen.Hi all, Something of a noob here. Having recently been on holiday, I came across a Spectrum+ in a box, with a collection of games in a shop, and, af…

    ... on screen, as the 12V needed to drive the LM1889 ... with the noise of the power supply.

    2. You ... it yet) and then, power on the computer. You will ... colour. If it is white, power off, wait a second, ... and power on again. Do this with ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Just bought a Spectrum+. Doesn't work. Red bars on screen.Hi all, Something of a noob here. Having recently been on holiday, I came across a Spectrum+ in a box, with a collection of games in a shop, and, af…

    ... do not separate the generated +12V from the '+9V' input, so ... gets a voltage in the 12V range anyway.[/QUOTE]

    12V (its nominal voltage is 15V ... or slighly higher. The Spectrum power supply gives 13V or more, but ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • ZX Spectrum power supplyHi, I'm looking for a small lightweight power supply that would be a perfect substitute for the original, it's meant for a video patched zx spectrum…

    ... the voltages and amperages to power several Spectrums!


    power supply with +5v, +12v and -12v providing 5 amps ... 0.5 amps on the -12v
    Zetr0 Zetr0 August 2012 Hardware
  • Semi-Dead Spectrum - Help RequestedI have finally got my hands on my two old Spectrums - neither of which work, but ideally I hope to get both of them working again. Spectrum number o…

    ... a bigger job as the power supply was once connected with the ... 7805, then power up and verify -5 and +12V on the 4116 ...
    Falco-F8L Falco-F8L October 2012 Hardware
  • Interface kempston compatible with +2A?It wanted to know if any type of interface kempston original that can be obtained by Internet since secondhand can be compatible with a spectrum +2A.…

    ... mine. It only worked in 48k basic mode though. I never ... , very close to the larger power supply din plug of the +2A ...
    Your Spec-chum Your Spec-chum October 2012 Hardware
  • Is this Spectrum dead?Hello. First post and all that... I have an old Spectrum +3 which has sat on a shelf for many years. Yesterday, when I plugged it in for the first…

    ... ? I wish I had another supply to test it with![/QUOTE ... ]

    Assuming the 12v are ok (the 5v are ... generated from the 12v line I belive), there's ... is a diagram of the power supply circuit:
    [url]http://hardware ...
    BCH BCH November 2012 Hardware
  • For Sale - Sinclair Hardware - Various ItemsHi, I'm looking to dispose of the below items of hardware:- 1 x Sinclair ZX Spectrum Plus 48k inc power supply 1 x Spectravideo joystick 1 x Nidd V…

    Hi,

    I still have the below items available for sale:-

    1 x Sinclair ZX Spectrum Plus 48k inc power supply
    1 x Spectravideo joystick
    1 x WH Smiths Computer Program Data Recorder model CPD-8300
    davesarah99 davesarah99 November 2012 Sales
  • car boot sale findJust happened upon a mint issue 3 48k attached to an opus discovery 1, also beautiful condition. Never used one. Is there much in the way of dedicate…

    ... upon a mint issue 3 48k attached to an opus discovery ... of few years. Mainly the power supply, which supplies opus-board, drives ... Opus-Board with the Spectrum (power supply will power up both) and use ...
    Speccyman Speccyman December 2012 Sinclair Miscellaneous
  • FS: Spectrum +2ARather than muck about with ebay again, throwing it out here, working Spectrum +2A, on its own, ?25 + shipping, PM me if anyones interested. [url=htt…

    ... have used +5 and +12V power supplies before for a +2A ... =12v+5v+power+supply+hard&_sacat=0&_odkw=12v+5v+power+supply& ... can't with a cheap power supply.

    It ... power supply with three voltages including -12V.
    A standard PC power supply ...
    bverstee bverstee December 2012 Sales
  • 48K problemI have the following problem with my 48K: When I turn it on with nothing plugged into the Interface port everything is ok. When something is plugged …

    ... , checking / testing the external power supply is the first stage.
    12V DC and 13V DC ... the +9V, +5V, +12V and -5V connections on the ... DC.
    The +12V should be between 10.8V ... You can also use 12V DC regulated PSU current ...
    1024MAK 1024MAK December 2012 Hardware
  • 48K problemI have the following problem with my 48K: When I turn it on with nothing plugged into the Interface port everything is ok. When something is plugged …

    ... come across a Speccy 48K+ and tried the power supply of this one ... normally with this power supply - I think the other power supply is gone.
    Jungsi Jungsi December 2012 Hardware
  • FS: Spectrum +2ARather than muck about with ebay again, throwing it out here, working Spectrum +2A, on its own, ?25 + shipping, PM me if anyones interested. [url=htt…

    ... _nkw=12v+5v+power+supply+hard&_sacat=0&_odkw=12v+5v+power+supply& ... can't with a cheap power supply.

    It's ... small power supply with three voltages including -12V.
    A standard PC power supply will ... have an original +2A power supply.
    DaRkHoRaCe DaRkHoRaCe December 2012 Sales
  • Adding IDE to your Spectrum +2 A/B (or +3)Hello my fellow [B]WoS'ers[/B] [B]This is a shared thread with [url]www.amibay.com[/url] which you can [URL="http://www.amibay.com/showthread.php?t=…

    ... way of adapting any other power supply to suit the +2A? Also ... optional ;))

    An ATX supply can be used but is ... /> Finally there are power supplies available with just 12v, 5v, and ground ... you don't have a -12v supply for the serial port buffers ...
    guesser guesser January 2013 Hardware
  • ZX Spectrum 48K help and Hello :)Hello out there I am a long time admirer of the ZX Spectrum range of computers my first go at one was in the early 1980s with my dads ZX 80 now its …

    ... 'd bet that the internal power supply that supplies the odd voltages ... should see +5v, -5v and +12v supplies to these chips, if ... need to fix the internal power supply before replacing the RAM though ...
    Winston Winston January 2013 Hardware
  • Using ZX Spectrums in America.Ok so the prospect of Working and Living in America, is constantly becoming an option for me and one of these days I may bite the bullet and go. Tha…

    ... of my demonstration from a 48K Speccy on the video projector ... by accidentally connecting the wrong power supply *the night before needing it ...
    Winston Winston January 2013 Sinclair Miscellaneous
  • Replacing capacitors on a +3 PSUDoes anyone know what kind of PSU does the +2A/B +3 use? Is it a switching one? Judging from it's weight I don't think it must be.... Anyway, I just…

    ... circuits (for the +5V and +12V) and a zener diode for ... the -12V.
    [QUOTE=gtsamour;680942] ... are near the transformer / regulator / power transistor / heatsink.
    [QUOTE= ... the 1980's switch mode power supply units (SMPSU). E.g. ...
    1024MAK 1024MAK February 2013 Hardware
  • Replacing capacitors on a +3 PSUDoes anyone know what kind of PSU does the +2A/B +3 use? Is it a switching one? Judging from it's weight I don't think it must be.... Anyway, I just…

    ... circuits (for the +5V and +12V) and a zener diode for ... the -12V.
    No low ESR caps ... are near the transformer / regulator / power transistor / heatsink.
    Hard to ... the 1980's switch mode power supply units (SMPSU). E.g. Atari ...
    Zetr0 Zetr0 February 2013 Hardware
  • Adding IDE to your Spectrum +2 A/B (or +3)Hello my fellow [B]WoS'ers[/B] [B]This is a shared thread with [url]www.amibay.com[/url] which you can [URL="http://www.amibay.com/showthread.php?t=…

    ... underneath the motherboard as the power header has been populated for ... +3 has a solid power supply on the +12v (about 1amp to play ... chassis, we gently route the power rail Molex wire around the ... reveals the position of the Power Molex wires, although with a ...
    Zetr0 Zetr0 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…

    ... 're there for the 5v power supply filtering network, only C4, on ... a toast-rack speccy. If 48K works I should know plugging ...
    Severino Severino February 2013 Hardware
  • Speccy PSUI've grabbed a Speccy PSU from fleabay and it looks like a Speccy Plus PSU. After testing it with a multimeter it's kicking out 12V rather than the …

    ... voltages of nine Spectrum 16/48K power supplies. I measured with a ... voltages without load on the power supply were between 11.33 and ... voltages without load on the power supply were between 11.43 and ... voltages with load on the power supply were between 8.45 and ...
    Pierre Pierre March 2013 Hardware
  • Spectrum 128K +2 problemhello, i am try to repair my spectrum 128k +2 grey, i remove all ram chips and i have some new ones spares, now i have remove all ram chips, i want …

    ... 48K machine will set the boarder to white almost immediately after power ... be no +5V or 0V supply to the Z80 CPU or ... ][/U] from the [U][B]power supply[/B][/U] [I]and[/I ...
    1024MAK 1024MAK March 2013 Hardware
<1…16171819202122…34>

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