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<1234567…34>
  • Spectrum 128k 2a or not 2b....Just picked up a +2 black case version and I'm in as little bit of a quagmire, The case is definitely black, has '+2A' stamped on the bottom, but in…

    ... /> Both the case and the motherboard have similar amounts of dust ... is isn't Z70833 a +2B motherboard??
    It also has what ...
    povvercrazy povvercrazy April 2017 Hardware
  • Saga KeyboardsI used to look at them in magazines and I always wanted one, especialy the Saga 1 Empereor but I would never even think to ask my parents for one cau…

    ... keyboard that the Spectrum 48 motherboard would be completely re-housed ... /]click here for full size picture[/url]

    I intend ... 48K motherboard with a +2 or if I am lucky a +2B motherboard =)
    Zetr0 Zetr0 April 2011 Hardware
  • Scart Leads for spectrumHi, I was going through my stuff the other day and found I have all the bits for making spectrum scart leads. I was going to ebay them but thought …

    ... sound is closer to the +2B than the +3 - it's ... with a +2B motherboard. Presumably if I can get the picture right (probably ...
    The Mighty Dopethrone The Mighty Dopethrone February 2017 Sinclair Miscellaneous
  • Swap speccy for Atari ?Hi all, well I`ve decided that it`s the end of Speccy life for me ( Sorry ! ) I have the following stuff that I want to swap for an Atari 800XL, or l…

    ... ,etc.

    Spectrum 128+2b, with power supply
    Spectrum ... scart cable for the 128+2b, amazing picture quality
    Tv RF ...
    daznic daznic May 2009 Sales
  • FS: +2B MotherboardGot a board on its own for sale, tested to menu with a home made psu but not gone further than that as I have no keyboard. ?5 plus p+p [url=http://p…

    Got a board on its own for sale, tested to menu with a home made psu but not gone further than that as I have no keyboard.

    ?5 plus p+p
    [url=http://postimg.org/image/kqo84jaz5/][img]http://s24.postimg.org/kqo84jaz5/P210413_14_26.jpg[/img ...
    Macc Macc April 2013 Sales
  • +2A/+2B/+3/+3B researchdoing my redrawing/correcting of the +3 schematic I'm uncovering lots of oddities in the service manuals. I am trying to work out what really exists…

    ... , 2, and 4 of the +2B motherboard (the wiggly one) It would ... 'm missing is a +3B motherboard. I wand to know if ... there was a physical motherboard made, or whether the two ...
    guesser guesser September 2010 Hardware
  • Challenging Common Knowlege: The +2A/B[I]I was going to write a big long essay about my research on this subject, but being an incredibly lazy person I never really got anywhere with that…

    ... design are present on +2A motherboard!

    After ... The +2A is a +3 motherboard (Z70830) with several components omitted ... design, the +2B exists as the Z70833 motherboard. This board fixes ... />
    [/B][/U]The +2B motherboard then is the Z70833, of ...
    guesser guesser November 2010 Sinclair Miscellaneous
  • Challenging Common Knowlege: The +2A/B[I]I was going to write a big long essay about my research on this subject, but being an incredibly lazy person I never really got anywhere with that…

    ... +2A (i.e a Z70830 motherboard in a Black +2 case ... !).

    To turn a +2B motherboard (Z70833 board, most Black +2s ...
    guesser guesser November 2010 Sinclair Miscellaneous
  • The Ultimate Spectrum, made from old spectrumsGiven that all types of the Spectrum are less than ideal in one respect or another, I wondered what the ulimate refinement would be, but just using o…

    ... +2A is in fact a +2B ;)

    The +2A and ... +3 use EXACTLY THE SAME motherboard, so both have the flawed ... into the case contain a +2B motherboard. (and thus have fixed sound ...
    guesser guesser December 2010 Hardware
  • +2 grey composite modWithout digging out the schematics, is it possible to do the composite mod like the 48k on these?

    The +2A motherboard is a +3 motherboard with disc drive controller components ... sound output

    The +2B motherboard has the sound bug fixed ... in Taiwan, and the +2B cases in China (hong kong ... +2A cases though contain a +2B motherboard. So if you have a ...
    guesser guesser March 2011 Hardware
  • +2 grey composite modWithout digging out the schematics, is it possible to do the composite mod like the 48k on these?

    pssst.... john.... you have a +2B motherboard in a +2A chassis.
    ... has a +2A motherboard, and its an identical motherboard to the + ... the nature of the +2A motherboard being updateable to a + ... 2A chassis contained a +2A motherboard then this would be awesome ...
    Zetr0 Zetr0 April 2011 Hardware
  • +2 grey composite modWithout digging out the schematics, is it possible to do the composite mod like the 48k on these?

    ... +2A cases though contain a +2B motherboard. So if you have a ... +2 it is usually a +2B (whatever is moulded on the ...
    john58 john58 April 2011 Hardware
  • +2 grey composite modWithout digging out the schematics, is it possible to do the composite mod like the 48k on these?

    ... the cut version but my +2b has decent sound[/QUOTE]
    motherboard, they all have the new ... are 4(?) versions of the +2B motherboard and they all have different ... :)

    EDIT: If your +2B is an issue 4 then ...
    guesser guesser April 2011 Hardware
  • Spectrum+3 static soundIs the sound on speccy+3 games always loud/static due to hardware incompatibilities?. Edit-appears to be a common issue on early models,oh well.

    ... , it was fixed on the +2B motherboard and the circuit can be ...
    guesser guesser August 2011 Hardware
  • ZX Spectrum Official modelsI am trying to write a section up on my web site about the different zx spectrum models from Sinclair research and amstrad that took over the product…

    ... and a different case. The +2B is a later version of ... +2" case with +2A and +2B moulded into the bottom. This ... of "+2A" cases contain a +2B motherboard.


    *with PHOTOS ...
    guesser guesser August 2011 Chit chat
  • Which Speccy sounds 'best'? ie, differences in AY outputDoes anyone know if there's any noticeable difference in the quality of the sound output on the Speccy models with an AY chip?i'm wondering if there'…

    No idea I'm afraid, but since you've dragged up the topic I'd like to point out that both versions of the +3 motherboard have the sound distortion. It was fixed on the +2B motherboard.
    guesser guesser September 2011 Sinclair Miscellaneous
  • Which Speccy sounds 'best'? ie, differences in AY outputDoes anyone know if there's any noticeable difference in the quality of the sound output on the Speccy models with an AY chip?i'm wondering if there'…

    ... . It was fixed on the +2B motherboard.[/QUOTE]

    Yes apologies ...
    xbomber xbomber September 2011 Sinclair Miscellaneous
  • Which Speccy sounds 'best'? ie, differences in AY outputDoes anyone know if there's any noticeable difference in the quality of the sound output on the Speccy models with an AY chip?i'm wondering if there'…

    ... . It was fixed on the +2B motherboard.[/QUOTE]
    Are you sure ...
    Alessandro Grussu Alessandro Grussu September 2011 Sinclair Miscellaneous
  • (grey) +2 ear modI saw some references here and there about grey +2 machines which had an external ear connector built in, so you can use external audio devices for l…

    ... /ordenadores/spectrum+2A-issue2.jpg"]+2B board[/URL]. :D
    If ... />
    If you have a +2B motherboard (Z70833) then it's not ...
    guesser guesser March 2012 Hardware
  • (grey) +2 ear modI saw some references here and there about grey +2 machines which had an external ear connector built in, so you can use external audio devices for l…

    ... /ordenadores/spectrum+2A-issue2.jpg"]+2B board[/URL]. :D[/QUOTE]
    2B motherboard (Z70833) then it's not ...
    RobeeeJay RobeeeJay March 2012 Hardware
  • Release date of ZX modelsWhat is release date of other ZX models ? ?. ?.1980 ZX 80 5. 3.1981 ZX 81 23. 4.1982 ZX Spectrum (rubber speccy) ?. 6.1984 ZX Spectrum + ?.…

    ... mostly distinguish +2A from +2B just from the case, ... +2As (wich are +2B inside), or a lot ... China where the cutted +2B motherboard was being made (and ...
    I think both motherboard and case was made in ... place, and the cutted motherboard was placed in Taiwan ...
    Metalbrain Metalbrain April 2012 Sinclair Miscellaneous
  • Release date of ZX modelsWhat is release date of other ZX models ? ?. ?.1980 ZX 80 5. 3.1981 ZX 81 23. 4.1982 ZX Spectrum (rubber speccy) ?. 6.1984 ZX Spectrum + ?.…

    The wiggly motherboard is definitely the +2B according to the service manuals. The +2B motherboard has a significantly different circuit to the +2A/+3 one.
    guesser guesser April 2012 Sinclair Miscellaneous
  • zx spectrum 128+2a/b questionsIv just purchased a 128+2 and have only one game for it lol (Super stunt man). A few question if anyone can help.. 1)I'd like to run games through …

    ...
    That is correct. The motherboard was designed from the start ... 1987) of the +2A/+3 motherboard (Z70830) and I have a ... three[1] versions of the +2B motherboard (Z70833), the first being (c ... br />

    [1]The +2B motherboard (Z70833) has an ISSUE 1 ...
    guesser guesser November 2012 Hardware
  • Spectrum +2A/+2B: How to tell?Hi all, Sorry if this has been asked before, but I've not found anything that can really help me tell. I've got a black +2, but would love to be ab…

    [QUOTE=kpuchatek;672880]+2b should have +2b at bottom, next to made ... the +2A moulding contain a +2B motherboard. I also don't believe ... with the release of the +2B otherwise they would surely have ... in the menu to display +2B instead of +2A.
    guesser guesser January 2013 Hardware
  • +3 Audio hates me with a passionHihi Since nobody seemed to have a spare +3B board, I've been trying to replace the audio entirely, aiming for a speaker inside the machine Since p…

    ... manufacturing plant for the +2B, is this at least ... to use the same motherboard which can be populated ...
    The +2B uses a different motherboard which is based on ... Amstrad switched to the +2B board fairly early on ... marking actually contain a +2B motherboard.
    guesser guesser April 2013 Hardware
  • Games with Music BugsI know there is already a thread about games with bugs (and indeed its a awesome thread), but I thought maybe it would be nice to open another one ju…

    ... early ones, with the +2A motherboard based on the +3 one ... , not the ones with a +2B motherboard inside but claiming to be ...
    Metalbrain Metalbrain May 2013 Games
  • Games with Music BugsI know there is already a thread about games with bugs (and indeed its a awesome thread), but I thought maybe it would be nice to open another one ju…

    ... early ones, with the +2A motherboard based on the +3 one ... , not the ones with a +2B motherboard inside but claiming to be ...
    Ivanzx Ivanzx May 2013 Games
  • Checking a Spectrum +2AI've just bought a (working) black +2A, and whilst I await the new Scart lead and an appropriate PSU, I thought I would ask a quick question about an…

    ... your black +2 is a +2B. Ignore what it says on ... 's bound to have a +2B motherboard inside.

    The only ...
    thingley thingley August 2013 Hardware
  • ZX Spectrum +2A and +2B - finding the true factsI'm confused. Some told me that a +2A has a +3 board, and the +2B got the simplified board. But I think that is not true. I have had over a dozen b…

    ... do argue Andrew, but because +2B boards are used in +2A ... say that these are actually +2B's; many would say it ... 's a +2A with a +2B motherboard - you can say that too ...
    guesser guesser December 2013 Hardware
  • +2a disc driveFound the answer I was look for!

    The +2A shares the same motherboard as the +3 (the Z70830).< ... />
    If you have a +2B motherboard (much much more likely) then ... disk controller gubbins on the motherboard.
    Amstrad planned to release ... for both the +2A or +2B.
    guesser guesser February 2014 Hardware
<1234567…34>

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