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<1…12131415161718…34>
  • Restoring AY registersAfter doing (not still finished) the sna to tap converter, I'm going to try to do the same for 128k snapshots. I've got threee ideas about what to do…

    ... an interesting routine at address 7805: an out (c),a followed ...
    Zup Zup April 2018 Development
  • Fixing a poorly Issue 3 - Odd faults.Here's one for you Spectrum fixers, I warn you it's a long one. I've spent a couple hours this evening doing several repairs on a rubber keyed Speccy…

    ... for voltages I discovered the 7805 had the 5v missing on ... action was to replace the 7805, all electrolytic capacitors with new ...
    Your Spec-chum Your Spec-chum July 2018 Hardware
  • LM317T modern replacementQuick question to everyone, I am back to modding my opus discovery 1 and looking at the LM371T regulators and wondering if there is a modern equival…

    ... like there is for the 7805 that i could replace both ...
    caver99 caver99 January 2019 Hardware
  • 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 fit a Traco 5v 7805 switch mode replacement, i guess ...
    Rorschak Rorschak October 2019 Hardware
  • ZX Spectrum 48K Issue 4B No soundHi, I have a ZX Spectrum 48K Issue 4B without sound. I tested the ULA on another Spectrum and works fine, tested the speaker and it has the correct …

    ... 's connected to Input of 7805.
    I don't know ...
    bganhao bganhao May 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…

    ... two and something like a 7805/7812 etc regulator, aside from ...
    spider spider August 2020 Chit chat
  • Screen corruption with devices on edge connector (grey +2)Hi, I've recently done a full capacitor replacement and replaced all 16x DRAM chips on my grey +2. Prior to this I would get a corrupted screen…

    ... 78S05 regulator and L-shaped heatsink. Is it worth replacing the ...
    Megatron-UK Megatron-UK August 2020 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…

    ... a 5V test on the 7805, and it's at nearly ... can't find any spare 7805's, set for 4.95v ...
    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…

    ... more robust version of the 7805 than was used in the ...
    DistantStar001 DistantStar001 April 2022 Hardware
  • blew up my 128i did it - damn. i accidentally reverted the polarity of the power power supply, so ended up with a blown 5v stabilizer, which i replaced, but there …

    ... the regulated 5V, and the 7805 regulator got blown first - i ...
    mark mark December 2001 Sinclair Miscellaneous
  • blew up my 128i did it - damn. i accidentally reverted the polarity of the power power supply, so ended up with a blown 5v stabilizer, which i replaced, but there …

    ... polarity this destroy the regulator (7805) but pobably don't cause ...
    Anonymous Anonymous December 2001 Sinclair Miscellaneous
  • 128 +2 video connections.I have just got my hands on a Spectrum 128 +2 grey model all in working order, what I need to know is if I take a signal from the CVBS Composite Vid…

    ... the machine with the stonking heatsink)
    Keith Coles Keith Coles April 2001 Sinclair Miscellaneous
  • Emegency....I posted a topic in "Miscellaneous" a couple of weeks ago about my 128K going bust, and it looks like it won't be repaired in the near future. This w…

    Is your broken 128 the heatsink version? If it is then ...
    paul paul February 2002 Sales
  • Emegency....I posted a topic in "Miscellaneous" a couple of weeks ago about my 128K going bust, and it looks like it won't be repaired in the near future. This w…

    ... 128 because it is the heatsink version as you say, and ...
    Spector Spector February 2002 Sales
  • What other 'retrotech' are you into, what hardware do you own?I suppose talking about machines, hardware & software other than Sinclair is off-topic, but my retro collection was kick-started at WoS! I had heard…

    ...
    1 x Speccy 128 - heatsink
    1 x Speccy 2 ...
    bbulldog bbulldog July 2002 Sinclair Miscellaneous
  • My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …

    ... i'm putting a bigger heatsink into the unit.
    I ...
    Takashi64 Takashi64 October 2002 Sinclair Miscellaneous
  • ObituaryYesterday my spectrum died :( Over 7 years of faithful service its finally gone to Silicon heaven. Rest in peace spectrum 48k+ Born sometime in 198…

    ... be down - there is a 7805 regulator in there which converts ...
    GP GP December 2002 Sinclair Miscellaneous
  • About the Disciple heat problem.I was wondering if anyone knows how to solve the problem that Disciple interfaces have that start losing it after some time of usage. I know that the…

    I have made a heatsink out of a small piece of aluminium. It works OK.
    Rudy Rudy January 2003 Sinclair Miscellaneous
  • About the Disciple heat problem.I was wondering if anyone knows how to solve the problem that Disciple interfaces have that start losing it after some time of usage. I know that the…

    ... /> !!!
    (*) = 8624 LM 340 T5 7805

    ################ = shape of thin ... of 8624 LM 340 T5 7805
    Connected above print / under ...
    Dr BEEP Dr BEEP January 2003 Sinclair Miscellaneous
  • Spectrum 128 wanted and a few choice gamesLooking for a spectrum 128k,prefer the original model without built in tape deck. Also any codemaster games especially the fruit machine series.Umm r…

    oh - there are 2 or 3 'heatsink' speccies going on eBay right now.
    GP GP January 2003 Wanted
  • Spectrum 128 wanted and a few choice gamesLooking for a spectrum 128k,prefer the original model without built in tape deck. Also any codemaster games especially the fruit machine series.Umm r…

    ... Ebay then, but the 128k heatsink model might cost you a ...
    Andrew Barker Andrew Barker January 2003 Wanted
  • Spectrum 128 wanted and a few choice gamesLooking for a spectrum 128k,prefer the original model without built in tape deck. Also any codemaster games especially the fruit machine series.Umm r…

    I missed out on a heatsink 128 for 13 quid on ebay a few days ago :( i do however attend car boot sales most weeks and have quite a few games at present.
    Picked up a caveman hand held game for a quid last week though...which was nice. :)
    beckite beckite February 2003 Wanted
  • Why are Heatsink Spectrums soo Rare ?is it a case of quanity ? if so how many did they make. In fact, i would love to know how many rubber 16k, rubber 48k, +`s, +2`s etc... where made, d…

    The Spectrum 128K (heatsink version) only had a production ...
    Paul Thompson Paul Thompson March 2003 Sinclair Miscellaneous
  • Another Spectrum +2 Fault (actually two of them :-)Just picked up a couple of +2s from a boot sale - both *much* better condition than my one - obviously had far less use ;) One was sold as fully wor…

    ... ULA (the one with the heatsink) - not being in it's ...
    GP GP May 2003 Sinclair Miscellaneous
  • Should WoS get a facelift?I think everyone would agree that "The World of Spectrum" has the most comprehensive collection of Speccy related stuff, and is essential resource fo…

    ... gone back to a 128K heatsink now...eh?

    well ...
    pigdog pigdog July 2003 Sinclair Miscellaneous
  • Should WoS get a facelift?I think everyone would agree that "The World of Spectrum" has the most comprehensive collection of Speccy related stuff, and is essential resource fo…

    ... gone back to a 128K heatsink now...eh?
    [/quote]
    Paul van der Laan Paul van der Laan July 2003 Sinclair Miscellaneous
  • What did you pay for a SpectrumJust wondered what everyone paid for getting hold of a spectrum. I got hold of one from eBay MINT condition, both the Box and the Speccy. Paid 110 …

    ... 86quid with boxed 16k and Heatsink 128k and some games, that ...
    Cornishdavey:)) Cornishdavey:)) July 2003 Games
  • What did you pay for a SpectrumJust wondered what everyone paid for getting hold of a spectrum. I got hold of one from eBay MINT condition, both the Box and the Speccy. Paid 110 …

    ... late i bought a 128k heatsink for sixteen notes including postage ...
    beckite beckite July 2003 Games
  • About buying Spectrum system for gaming. What kind of package?Hi, I've always been a C64 fan. No do not get me wrong, Spectrum was so rare here compared to Commodore. Lately I've been looking for Spectrum to pl…

    ... a rubber keys, or a heatsink 128K. It's a bit ...
    John H John H October 2003 Sinclair Miscellaneous
  • Whats wrong with my 128k?The little power converter (the thing with three legs) that sits on the cooling fin was broken, so I bought a new power converter and replaced it. Bu…

    The Voltage Regulator you bough (7805), was it a 1A type? ... work correctly. Generally I say, 7805 with 1Amp or more is ... . Don't try it with 7805 that have plastic heat spreader ... a chance that the damaged 7805 damaged other components in Speccy ...
    LCD LCD November 2003 Sinclair Miscellaneous
<1…12131415161718…34>

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