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Search Again :: Adv Search 1000 results in 0.018s
<1…21222324252627…34>
  • What Spectrum to choose?Hi i'm new to the Spectrum. I read 'bout it in CDA (Polish game magazine) and watched LGR review of the 48k and it REALLY interested me. What model m…

    ... have a flawed audio amplifier circuit which makes the sound output ... ) all have the built in tape deck, which I have read ... control. Also if the intrenal tape deck packs up totally, there ... you can attach an external tape deck with no modification. If ...
    Alien 8 Alien 8 November 2010 Hardware
  • 3D Racers...what's your favourite?I'm talking along the lines of outrun and super hang-on A personal fave is Nightmare Rally (more for the loading screen), I really wanted to like lo…

    ... fav of mine , grand prix circuit

    the trouble / issue ... was 20-30 minutes on tape :cry:

    [youtube]OXX_otJc354 ...
    fog fog December 2010 Games
  • 3D Racers...what's your favourite?I'm talking along the lines of outrun and super hang-on A personal fave is Nightmare Rally (more for the loading screen), I really wanted to like lo…

    ... fav of mine , grand prix circuit

    the trouble / issue ... was 20-30 minutes on tape :cry:

    [youtube]OXX_otJc354 ...
    VanTammen VanTammen December 2010 Games
  • +2 Grey external tape modIve had a search through previous posts and besides mclouds mod for the +2a I couldnt find anything pertaining to the grey, only reason im posting is…

    ... it doesn't have a tape connection at all. Your first ... REC points are on the circuit board of the cassette mechanism ... to press play on the tape deck for the lead to ...
    FrankT FrankT December 2010 Hardware
  • +2 Grey external tape modIve had a search through previous posts and besides mclouds mod for the +2a I couldnt find anything pertaining to the grey, only reason im posting is…

    ... it doesn't have a tape connection at all. Your first ... REC points are on the circuit board of the cassette mechanism ...
    guesser guesser December 2010 Hardware
  • 48k rubber key screen corruption[IMG][URL=http://img195.imageshack.us/i/img7398g.jpg/][IMG]http://img195.imageshack.us/img195/5563/img7398g.th.jpg[/IMG][/URL] Uploaded with [URL=htt…

    ... out a replacement transistor, and a bad power supply circuit can cause ...
    guesser guesser December 2010 Hardware
  • +2 Grey external tape modIve had a search through previous posts and besides mclouds mod for the +2a I couldnt find anything pertaining to the grey, only reason im posting is…

    ... built in deck with no tape when I wanted to use ... in deck still being in circuit. Like I say, I knew ...
    FrankT FrankT December 2010 Hardware
  • Spectrum "console"Is it me just getting more irratable as I grow older or does anybody else share my annoyance at people listing Spectrums on ebay as consoles?:mad:

    ... />
    And then you have "tape lead" which here in the ... were made popular?

    -Transistor instead of Radio
    -Xerox ...
    zxbruno zxbruno January 2011 Sinclair Miscellaneous
  • Possible design fault in +2A/+3 power pack. Fix?It's the second time a +3 power pack ceases to work when I make a short while using the scope to diagnose a +2A/+3 computer. And it's the second tim…

    ... base-emitter union of this transistor is about 3.5A / 127 ... the 7812 probably has short-circuit protection. What's going on ... upon to supply the short circuit current through the base of ... will never blow under short circuit conditions. Clearly the fuses are ...
    Alcoholics Anonymous Alcoholics Anonymous February 2011 Hardware
  • 2 48K speccys dead..Hey guys! I've got two of our rubbery friends with me that need some help. They've been like this for some time, but I would like to try and fix th…

    ... is caused by a dead transistor in on-board voltage conversion ... by an edge connector short-circuit, other parts may have been ...
    RetroTechie RetroTechie February 2011 Hardware
  • 2 48K speccys dead..Hey guys! I've got two of our rubbery friends with me that need some help. They've been like this for some time, but I would like to try and fix th…

    ... is caused by a dead transistor in on-board voltage conversion ... by an edge connector short-circuit, other parts may have been ...
    Diogo Diogo February 2011 Hardware
  • At the Carboot sale today.Today at the carboot sale I picked up An Acorn Electron -I see these all the time, An Official Branded BBC Micro Datacassete Recorder - I'v…

    ... touches the roller where the tape goes spins all the time ... flimsy plastic) it pulls the circuit board out slightly, have to ...
    mel the bell mel the bell February 2011 Chit chat
  • At the Carboot sale today.Today at the carboot sale I picked up An Acorn Electron -I see these all the time, An Official Branded BBC Micro Datacassete Recorder - I'v…

    ... touches the roller where the tape goes spins all the time ... flimsy plastic) it pulls the circuit board out slightly, have to ...
    Scottie_uk Scottie_uk February 2011 Chit chat
  • At the Carboot sale today.Today at the carboot sale I picked up An Acorn Electron -I see these all the time, An Official Branded BBC Micro Datacassete Recorder - I'v…

    ... touches the roller where the tape goes spins all the time ... flimsy plastic) it pulls the circuit board out slightly, have to ...
    zeropolis79 zeropolis79 February 2011 Chit chat
  • ZX80 FaultyI have a boxed ZX80 that when I connect to the telly it doesnt tune in right. I can use the K/Board and see that its working on the screen. Iv tried …

    ... here is a simple amplification circuit

    [img]http://www ... with a very common NPN transistor ( BC108 ). we then pull down ...
    Zetr0 Zetr0 March 2011 Hardware
  • ZX80 FaultyI have a boxed ZX80 that when I connect to the telly it doesnt tune in right. I can use the K/Board and see that its working on the screen. Iv tried …

    One challenge I found with that circuit is that the specs for the transistor and resistor are lacking. For example, how many amps for the resistor?
    jegs2 jegs2 March 2011 Hardware
  • ZX80 FaultyI have a boxed ZX80 that when I connect to the telly it doesnt tune in right. I can use the K/Board and see that its working on the screen. Iv tried …

    ... a very common, general purpose transistor and it uses about 100ma ... ?

    Anyway, in the circuit above we are taking the ... , boosting the signal with the transistor and then pulling that signal ...
    Zetr0 Zetr0 March 2011 Hardware
  • ZX80 FaultyI have a boxed ZX80 that when I connect to the telly it doesnt tune in right. I can use the K/Board and see that its working on the screen. Iv tried …

    ... a very common, general purpose transistor and it uses about 100ma ... ?

    Anyway, in the circuit above we are taking the ... , boosting the signal with the transistor and then pulling that signal ...
    jegs2 jegs2 March 2011 Hardware
  • Grey +2 regulatorIv just checked the regulator and its a TS2940. Could someone tell me the equivalent please?

    ... BUT it is a 2A transistor (can take more current than ... 7805 which is a 1A transistor). At least all my three ... +2 grey, its also the tape recorder that when loading, needs ... same time (+2 board, interfaces, tape recorder).

    The 78S05 ...
    gtsamour gtsamour March 2011 Hardware
  • +2 grey composite modWithout digging out the schematics, is it possible to do the composite mod like the 48k on these?

    ... Amstrad made with the TR4 transistor (it is silk screened round ... correct for the composite amplification circuit... you may also notice some ...
    Zetr0 Zetr0 March 2011 Hardware
  • +2 grey composite modWithout digging out the schematics, is it possible to do the composite mod like the 48k on these?

    ... />
    I redesigned a similar circuit on the Amiga 600/1200 ... each signal by a simple transistor =)

    If I find ... will need a very simple circuit to pull up the Red ...
    Zetr0 Zetr0 March 2011 Hardware
  • Spectrum +2's and TR4...?Hi people, I saw mentioned in another thread (+2 composite mods) that TR4 is the wrong way round on grey +2's. Can someone give me more info on this…

    ... up.

    the TR4 transistor on the 128k +2 (Grey ... from-the-factory state, the Transistor emmits on the collector line ... correct for the composite amplification circuit... you may also notice some ...
    Zetr0 Zetr0 April 2011 Hardware
  • Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…

    ... , probably not even changing the transistor TR4 ztx650 by ztx651 (2A ... intensity is great and the transistor holds, we could face the ... are usualy from internal short circuit on Spectrums edge connector or ...
    LCD LCD April 2011 Hardware
  • Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…

    ... doubts is with booster (the circuit generating the signal-5V and ... the 7805 has a short circuit protector, but the section 12V ... of burning overcurrent. Using another transistor that can support more strongly ... a little more on short-circuit, or if a peak high ...
    Mobutu Mobutu April 2011 Hardware
  • RGB to S-Video and Composite Adapterif I produced a dongle that generated composite and s-video from the RGB socket on +3 and Black +2 spectrums would anyone be interested? I'm thinkin…

    ... could use a standard NPN transistor for each of the signals ... larger and more complicated the circuit the more rapidly the whole ...
    guesser guesser May 2011 Hardware
  • likely damage caused to +2 by too highly rated supplyHi. did have a quick search but couldn't see an answer. I've been offered a +2 which the previous owner damaged by connecting too high a power supply…

    The next best "suspect" is the transistor ZTX650. Can only find it on ebay since it is obsolete.

    The tape recorder strength thing is probably due to worn out rubber belt. Easy to find and replace from most electronic shops.
    gtsamour gtsamour May 2011 Hardware
  • 128K blues, part +2: picture and tape driveI recently purchased an original (grey) +2 which sadly seems not to be fully working. The computer powers up but there is no way to obtain a stable p…

    ... were detached from the small tape deck circuit board, but the small ... taken, say, from another old tape recorder? I will mostly use ... the tape deck with a cassette adapter ...
    Alessandro Grussu Alessandro Grussu May 2011 Hardware
  • ZX81 composite (back porch) mod!Hi everybody, Some of you may be aware of the existence of this mod: [url]http://forum.tlienhard.com/TS1000/homepage.ntlworld.com/deborah.clayton1/p…

    ... need the (much) more complicated circuit above.

    Just to ... composite video through an amplifier transistor.... there's still no back ...
    Spirantho Spirantho June 2011 Hardware
  • Challenge Sprint 4x tape recorderHi, I noticed a [url="http://www.worldofspectrum.org/infoseekid.cgi?id=1000051"]Challenge Sprint[/url] on eBay, and checked out the WoS entry for it…

    ... you want to use normal tape deck or disc interface, switch ... be interesting to see the circuit board inside the Sprint to ...
    mark_k mark_k July 2011 Hardware
  • Challenge Sprint 4x tape recorderHi, I noticed a [url="http://www.worldofspectrum.org/infoseekid.cgi?id=1000051"]Challenge Sprint[/url] on eBay, and checked out the WoS entry for it…

    ... positive edge. A polarity correction circuit ensures that the edges are ... regardless of the polarity the tape were recorded with.

    mcleod_ideafix mcleod_ideafix August 2011 Hardware
<1…21222324252627…34>

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