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<1…16171819202122…34>
  • Getting olderI'm not 43, i'll be 44 in July and this middle age lark is shite! I get aches and pains where i never had them before, my hair is grey and getting t…

    ... eyes and i make a noise sometimes when i stand up ...
    zx1 zx1 April 2018 Chit chat
  • Oric Atmos HelpMaybe a bit of a long shot but there are enough skilled people here, so hopefully I can get some thoughts please. OK I have an Oric Atmos here, it…

    ... a space invaders fire type noise) so I do not have ...
    spider spider September 2018 Chit chat
  • WAV file playback ( YOUTUBE)I had this magnificent idea... which no one else seems to have done... but it failed. I uploaded a WAV file of one of my games (not so magnificent …

    ... Speccys due to high pitched noise....
    I tested the process ...
    retromad retromad November 2018 Sinclair Miscellaneous
  • My 128k +2 Clean upI decided to pull my old 128k +2 and 48k rubber key out of the attic this weekend. Not been switched on in 30 years or so. The rubber key is dead …

    ... it had a constant clicking noise as though a key was ...
    Nonsense in BASIC Nonsense in BASIC December 2018 Hardware
  • +3 PSU vs +2 PSUI'm referring here to the black +2's :) Now, a closer look shows the differences between the power supplies for these really is: "The 5V line is …

    ... rated at 2A, the +12V at 700mA (200mA for the ... +2A) and the -12V at 50mA."

    ... one:[i] Is this 'higher 12V capacity' simply because of the ... not need or require any 12V supply to it. The question ... d need a half decent 12V line if you were ...
    spider spider January 2019 Hardware
  • Sinclair 16k Ram pAck Issue3 schematicsHi guys, I am willing to repair a 16k ram pack for the ZX81 but I cannot find any schematic of the ISSUE 3 ram pack. I could only find a schematic…

    ... I am missing -5V and +12V. I would like to get ...
    repetto74 repetto74 March 2019 Hardware
  • DCP Interpacks - New Old Stock Still Available (Limited)!We rarely see New Old Stock of interfaces for ZX Spectrum appear - Never mind Still being on sale from the 1980's! https://dl.dropboxusercontent.c…

    ... wire terminals
    • 3 x 12V Stepper motor outputs - screw wire ...
    matalog matalog September 2019 Hardware
  • New Brad Pitt filmCome on admit it, i'm sure many of us are the same here. The Brad Pitt film which is being hyped and getting good reviews, all i can think about are …

    ... skool blocky graphics and the noise the ship made when it ...
    psj3809 psj3809 September 2019 Chit chat
  • Modifying a speccy to +5v only operation.Just a thought experiment so far. Let's say i wanted to make a more resilient spectrum by getting rid of the DC-DC converter circuit. This would remo…

    ... would remove the -5v and +12v rails from the speccy. The ... use upper pin 22/23 (12v DC / 12v AC).
    I would ... guess i could fit a 12v version as well, and power ...
    Rorschak Rorschak October 2019 Hardware
  • Sucharit Bhakdi on Randomised TestingI sort of understand what Prof. Bhakdi and others are talking about here, but is it being done in regard to this coronavirus? Which countries have do…

    ... as there is so much noise in the other thread.
    dmsmith dmsmith April 2020 Chit chat
  • 16k and PEEK 40000 (on a real 16k Spectrum)?Imagine a real 16k Spectrum (without any RAM expansion or circuits fitted). What would I get if I do a PEEK or try to access memory over 32767? Wo…

    ... time) number due to electrical noise?

    Thanks ...
    Zup Zup June 2020 Hardware
  • No AY sound from online emulatorsI've writing an app that makes sound using the AY. I have a simple update mechanism that works like this: 1. During a frame, I write values to a b…

    ... 4 bits
    db 0 ; noise pitch 5 bits
    db ...
    evilpaul evilpaul June 2020 Development
  • 48k issue 4B display problem etchi,, i have a zx spectrum 48k issue 4B with a display issue it has wavy lines in both the border and paper,some colours seem worse than others ie red…

    ... error..checked resistors etc _5v,12v,5v all present ... anybody have ...
    mark8bit mark8bit June 2020 Hardware
  • General PSU repair guidesNot Speccy related. I'm just looking for a guide as such as to where to begin with a power supply repair. Realise this is a bit of an odd thing to as…

    ... its going to want a 12v supply as well as a ...
    spider spider August 2020 Chit chat
  • Tron Software - Ninja Master / Oriental HeroI just had a go at both of Tron software's games. Oriental Hero is, as it was at the time, utter unplayable trash. I owned that one back in the d…

    ... which are quite good. The noise when you qualify is insane ...
    Bluce_Ree Bluce_Ree August 2020 Games
  • zx spectrum 48k interference during first two minutes of warm upi have a issue 3B 48k that i am looking at during the first two minutes (approx.) of warm up there is interference on the screen (tried to take a pic…

    ... video cable or power supply noise etc) then suddenly its fine ...
    mark8bit mark8bit October 2020 Updates
  • Spectrum +2A Keyboard not workingHi - I tested my Spectrum the 1st time in years yesterday and I got the sound the computer makes when you hold down a key. I thought it must be just …

    ... couple of keys and the noise stopped.

    However no ...
    mutant mutant January 2021 Hardware
  • Spectrum +2A Keyboard not workingHi - I tested my Spectrum the 1st time in years yesterday and I got the sound the computer makes when you hold down a key. I thought it must be just …

    ... couple of keys and the noise stopped.

    However no ...
    mutant mutant January 2021 Hardware
  • Microdrive Data Recovery.Hi All, So I've been working on recovering microdrive cartridge data by oversampling the magnetic traversals at 8 Msps ( approximately 100x the ma…

    ... , while ignoring brief transitions and noise caused by information loss, and ...
    cj7hawk cj7hawk March 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…

    ... that's D15... In the 12v rail.

    So I ... it in circuit. Check the 12v generating circuit... Needs a replacement ... , no problems, 5v rail stable, -12v and -5v also both present ...
    cj7hawk cj7hawk December 2021 Hardware
  • Building a ZX Spectrum and I have some voltage questionsI've posted about this before looking for parts, but now I've found all the hard-to-get stuff (thank you Retrolium!). So I figured new questions, new…

    ... Lower RAM: +4.98V
    +12V to Lower RAM: +12.56V ...
    DistantStar001 DistantStar001 April 2022 Hardware
  • SpecBAS gets asynchronous BEEP and PLAYHey guys - been a while. SpecBAS recently got update to v0.1234 which has brought with it the ability to issue BEEPs asynchronously - they no long…

    ... , 1=Tone, 2=Noise, 3=Mixed tone/noise as you can't ...
    Dunny Dunny May 2022 Updates
  • The sound quality (or not) of AM radioInspired by [url=https://worldofspectrum.org/forums/discussion/comment/995799/#Comment_995799]this comment about the BBC's methods of beating pirate …

    ... the car because the background noise - wind, tyres on the road ...
    The Mighty Dopethrone The Mighty Dopethrone August 2022 Chit chat
  • +2A PSU - power transistor substitute?I used a +2A PSU on a newly acquired Speccy for the first time in quite a while earlier, it was causing apparent issues in that starting the tape dec…

    ... by a brownout in the 12v line (Speccy itself was fine ... />
    I saw - 12 and +12v which appeared stable unloaded, but ... was nothing - and now the 12v is off as well.
    jjne jjne October 2022 Hardware
  • Anyone need help TZXing for MIA/MIS ?Hiya folks, A lot of chat but no files yet [img]/__forums/images/smiles/icon_wink.gif[/img] So does anyone have any of the titles in the MIA/MIS li…

    ... by insering a lot of noise on the tape and the ...
    Staffan V Staffan V July 2001 MIA/STP/SDP
  • +3 RGB OutI've jus get an +3 that works fine, but i would like to use my CPC RGB monitor with it. Does anybody know something about if it's possible or not?. I…

    I made a scart cable easily enough. Connect +12V to fast RGB blanking. I changed the 470ohm resistor on the composite sync line to 330 to make a certain tv work all the time. I've just completed a stereo modification on the secaria site.
    Anonymous Anonymous February 2002 Sinclair Miscellaneous
  • +3 RGB OutI've jus get an +3 that works fine, but i would like to use my CPC RGB monitor with it. Does anybody know something about if it's possible or not?. I…

    Thanks for your kick response, but I don?t know where to connect the resistor and then +12V. Do you know the pin numbers to connect?
    Luis Antonio Gaite Luis Antonio Gaite February 2002 Sinclair Miscellaneous
  • +3 RGB OutI've jus get an +3 that works fine, but i would like to use my CPC RGB monitor with it. Does anybody know something about if it's possible or not?. I…

    ... pin 16. Connect it to +12V. Connect ground to 18 also ...
    Anonymous Anonymous February 2002 Sinclair Miscellaneous
  • Dead Speccy???I have a 48k+ speccy that boots up with rubbish! is it the z80 cpu? it still has the white boarder but the rest is a mess. any help would be nice..…

    ... presence of the -5V and +12V, that voltages are very important ...
    Anonymous Anonymous February 2002 Sinclair Miscellaneous
  • Connect a Discman o soundcard into a ZX to play games without TapesDavid Madrid / Spain Hi: I like to use more my ZX machines but the load times drives my crazy and I dont like to damage the zx cassete player and t…

    Or...
    Encode the loading noise into MP3. The filesize can ...
    paul paul January 2002 Sinclair Miscellaneous
<1…16171819202122…34>

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