what are the differences between the 48K spectrum and the spectrum+ ?

^^^^^ see above ^^^^^
Post edited by guesser on
My rubbish website including the redrawn Amstrad schematics and the new home of the Sinclair FAQ wiki.
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  • edited October 2004
    The keyboard and a built in reset button.


  • edited October 2004
    any rom/software or motherboard changes?
    or just a new "box"???

    My rubbish website including the redrawn Amstrad schematics and the new home of the Sinclair FAQ wiki.
  • edited October 2004
    Probably another issue of the board ? Yes (i.e 6a)
    Another ROM? No !

    I often just changed the motherboard from a 48K to a defect Spectrum+
    (and soldered the reset button on it.)
  • edited October 2004
    Probably another issue of the board ? Yes (i.e 6a)
    Another ROM? No !

    I often just changed the motherboard from a 48K to a defect Spectrum+
    (and soldered the reset button on it.)
  • edited October 2004
    Thanks for the info!
    I often just changed the motherboard from a 48K to a defect Spectrum+
    (and soldered the reset button on it.)

    you sound like you know your way around a soldering iron, can you tell me, if the big squre transistor blows up where is the problem likely to be. maybye i can get my speccy out of the garage and fix it up ;)

    My rubbish website including the redrawn Amstrad schematics and the new home of the Sinclair FAQ wiki.
  • edited October 2004
    Some Spectrum+ were ordinary Spectrums which were sent back to Sinclair to be upgraded, so they won't all have the same motherboard - in theory they could have any motherboard, but there will be a whole lot more with the board revision that was current when the + was launched (or later revisions, if any) than earlier revisions.

    I did hear of a Spectrum+ that someone bought second hand, found they could only play 16k games & assumed it had faulty memory chips - when it was opened up, it turned out it was a 16k Spectrum inside a + case upgrade.
  • edited October 2004
    I think the board is an issue 6a, I had to put a new modulator from an issue 3 board on it, as the modulator was missing, and i think at the time I noticed that the issue number was different. As I said, the power transistor has blown, and I can't find any bridges on the board etc, Is it just the transistor was dodgy, or something more serious??
    My rubbish website including the redrawn Amstrad schematics and the new home of the Sinclair FAQ wiki.
  • edited October 2004
    I have changed the transistor, and the new one blew too, :(
    any help would be much appreciated, before my dad says "well it doesn't work, Throw it away" again!
    My rubbish website including the redrawn Amstrad schematics and the new home of the Sinclair FAQ wiki.
  • The colour ?
    Every time I read that the oldest person in the world has died, I have to do a quick check to see it isn't ME..........
  • I had a Spectrum + with an issue 4S board.

    The only changes are the keyboard and that reset button. Both things can be retrofitted to any Spectrum, so I guess there are no differences.

    BTW... didn't some boards need some pull up resistors to read the + keyboard reliably?
    I was there, too
    An' you know what they said?
    Well, some of it was true!
  • I once bought a Spectrum + as " Working ", when it arrived, it was an empty shell !
    Every time I read that the oldest person in the world has died, I have to do a quick check to see it isn't ME..........
  • The name... :)
    So far, so meh :)
  • IIRC the Spectrum+ was also sold as an upgrade kit. So you could have any issue board that was current at the time inside. Which is probably common.

    Summarized: ZX Spectrum 16 or 48K, better keyboard + reset button.
  • Why the hell are people bumping this thread from over a decade ago? 8-}

    Just in case you're all in suspense, I fixed the machine...
    My rubbish website including the redrawn Amstrad schematics and the new home of the Sinclair FAQ wiki.
  • It's the new "in" thing to bump decades old threads 8-}
  • I like it. It's very 'retro'.
    My only Speccy game (so far): a simple snake clone
  • I would never bump an old thread myself :))
    Every time I read that the oldest person in the world has died, I have to do a quick check to see it isn't ME..........
  • IIRC the Spectrum+ was also sold as an upgrade kit. So you could have any issue board that was current at the time inside. Which is probably common.

    Summarized: ZX Spectrum 16 or 48K, better keyboard + reset button.

    I bought one of these upgrade kits when they were released and, er, upgraded. I thought it was fantastic at the time. Now, it's the only Spectrum I own which isn't fully working, I bought a rubber key model recently in favour if fixing it!
  • The 'plus' also had little fold away feet so you could angle the machine if you so desired (well I think it did anyway)
  • Also, if you rubbed it the right way a Genie appeared and granted you three wishes, or so I am told ! ;)
    Every time I read that the oldest person in the world has died, I have to do a quick check to see it isn't ME..........
  • Grey key, have you been rubbing feet again :-O
  • I have so many feet in my repair kit, I could be a centipede :))

    Mostly rubber ones ( original and not modern ) which could be a problem as I am always losing socks !
    Every time I read that the oldest person in the world has died, I have to do a quick check to see it isn't ME..........
  • The cover didn't come unstuck.
  • The 'plus' also had little fold away feet so you could angle the machine if you so desired (well I think it did anyway)

    That's right.
  • The colour



    Damn ! :)
    Every time I read that the oldest person in the world has died, I have to do a quick check to see it isn't ME..........
  • The biggest difference is, that rubber Spectrum has a much better keyboard.
    I always thought that the Spectrum+ keyboard is utter rubbish ..
  • Pegaz wrote: »
    The biggest difference is, that rubber Spectrum has a much better keyboard.
    I always thought that the Spectrum+ keyboard is utter rubbish ..

    I like them both. I also think that the + in particular was the smartest looking computer around, compared to other computers on offer when it was released. I wouldn't call the + rubbish to use, I was very happy with it but it didn't offer a substantial improvement over the other.
  • edited September 2016
    Rubber keys were quite good at least for games, also with a little practice I achieved decent speed typing basic programs.
    Playing games at + keyboard was terrible experience and fast typing it was only a dream.
    btw, I'm not even talking about the design, but still rubber Spectrum and Spectrum +3 are far more attractive to me.
    Post edited by Pegaz on
  • guesser wrote: »
    Why the hell are people bumping this thread from over a decade ago? 8-}

    Just in case you're all in suspense, I fixed the machine...

    What was up with it? The "big square transistor" is probably the 7805 5V regulator and if it blew up twice, there must have been something else wrong with it ?
  • guesser wrote: »
    Why the hell are people bumping this thread from over a decade ago? 8-}

    Just in case you're all in suspense, I fixed the machine...

    So did you fix it ?

    ;)
    Every time I read that the oldest person in the world has died, I have to do a quick check to see it isn't ME..........
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