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<1234567…34>
  • 48k ULA heat sink required ?ULA heat sink worthwhile mod or just internet hype ? if worthwhile is a cheap heat sink going to cut the mustard ? i wonder if anybody has done any …

    ULA heat sink worthwhile mod or just internet hype ? if worthwhile is a cheap heat sink going to cut the mustard ?
    i wonder if anybody has done any before & after heat tests ?
    mark8bit mark8bit October 2021 Hardware
  • 128k heat sink joystick issuesI have only recently been using my 128k heat sink again - using a scart lead off Ebay that works great on the LCD TV- getting really into it - beats …

    ... recently been using my 128k heat sink again - using a scart lead ...
    retromad retromad May 2012 Hardware
  • 128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …

    ... perfectly if I cooled the ULA (with cooling spray). The first ... measuring the signals of the ULA I found out that the ... the RAS pin of the ULA. Finally I placed a 180pF ... ) even if I heated the ULA with a hair dryer.
    ingo ingo January 2009 Hardware
  • Trying to add a play lead to my +2(grey)I know this has been discussed at length and rediscussed again but I'm still not sure how to do it! I just want to add a line in so that I can turbo …

    ... motherboard just next to the heat sink.

    Wires connect to ... one of these fries my ULA if I get it wrong ...
    thingley thingley April 2008 Hardware
  • Spectrum +128K Toaster Rack & a skanky Spectrum +2A Bath - Incl. naked pictures!Ok, so today was another productive day to complete 2x Spectrums with their baths and assembly. One fat and grey +2A and one sleek sexy 128K The grey…

    ... nice cool blue heat sink on her pus...uh....ULA!

    [IMG ...
    Hedegaard Hedegaard September 2011 Sinclair Miscellaneous
  • ZX81 back porch fix using LM1881Hello! Has anyone here did the back porch fix for ZX81 using LM1881? I did it this weekend and instead of clear black on white i got black on dark g…

    ... 200mv p-to-p. The ULA video output is a lot ... the circuit. ULA is over 40C for example. 7805 heat sink cannot be ...
    ArtemKuchin ArtemKuchin July 2012 Hardware
  • Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …

    ... out , the ULA and ROM missing as well. The heat sink is painted ...
    harriusherbartio harriusherbartio September 2015 Hardware
  • Original rubber key 48k'sThis question is to some point academic; But i seem to remeber the original 48k Rubber Keys Speccy came in versions 1,2 & 3! (way back when, occasi…

    ... low-powered version of the ULA was employed. Even so, a ... continues " The change in the ULA on the Mark 3`s ... bit now floats until the ULA has warmed up, and no ... that on the latter the heat sink is nearer the expansion port ...
    Mike Jeanes Mike Jeanes July 2001 Sinclair Miscellaneous
  • Zx Spectrum Laptop (again)I've been reading all the old treads about a possible portable speccy. I even found the one about the Speccy Laptop. But it seems there's a lot of ne…

    ... .

    Actually, on inexpensive ULA subsititutes, I wonder how well ... clock cycle) could emulate the ULA in a new design Speccy ... doesn't even have a heat sink. (On a Spectrum, everything is ... heatsink runs cooler than the ULA on a Spectrum, and it ...
    Winston Winston March 2007 Sinclair Miscellaneous
  • Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…

    ... .

    The ULA getting almost untouchable is pretty ... could also be the ULA. Have you tried adjusting ... chip replaced and the ULA checked out fine on ... option for placing a heat sink on ULA's. I've come ... otherwise) just covering the ula's surface (and not ...
    gtsamour gtsamour July 2007 Sales
  • Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…

    ... ) was cured by replacing the ULA.

    The ... chip replaced and the ULA checked out fine on ... option for placing a heat sink on ULA's. I've come ... otherwise) just covering the ula's surface (and not ... than nothing, and those ULA chips weren't really ...
    DEATH DEATH July 2007 Sales
  • I want to build a new, super spectrum ;-)only kidding Andrew :-) my brain's going at a mile a minute at the moment, so I thought I should put some of the ideas down in case one of them is w…

    ... chips like the CPU and ULA to suffer SCR latchup (CMOS ... anything critical.

    The ULA is a bit of a ... a Spectrum project - not a ULA replacement, but for a CP2200 ... generate very little heat (probably won't need a heat sink). Having said ...
    Winston Winston September 2007 Hardware
  • Interface rom - Need help to dump itHi, I have temporarily an interface that is similar to a multiface. It has an NMI button and displays a menu where states can be saved and pokes ent…

    ... . Last night, i quickly replaced ula, rom, z80 and the logic ... noticed was that the heat sink and the ula were abnormaly hot.
    odious odious October 2007 Hardware
  • 128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …

    ... my DivIDE+ plugged in.
    Heat sink area gets HOT and the ... sure sounds like a duff ULA that disfunctions after heating up ...
    gtsamour gtsamour January 2009 Hardware
  • 128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …

    ... sure sounds like a duff ULA that disfunctions after heating up ... ". That sounds like very hot heat sink. So first job is to ... , then giving the ULA an additional heat sink and if ULA problems remain then ... would try to replace the ULA.

    Ingo ...
    ingo ingo January 2009 Hardware
  • 128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …

    ... . This reduces heating power at heat sink.

    Or ... That sounds like very hot heat sink. So first job is ... giving the ULA an additional heat sink and if ULA problems remain then ... ; divIDE whilst actively drawing heat away from the regulator heatsink ...
    BloodBaz BloodBaz January 2009 Hardware
  • Greetings all overheat problemsfirstly hello everybody and thanks for adding me to the forum dont know if ill be much use here but i hope so the problem i have or should i say a…

    ... br /> 2. Check the ULA - is it getting hot?
    ULA... and still I had no ... heatsink.. upon investigating the heat was localized on the ... was being dissipated by the sink...

    this ... of power that the heat-sink couldn't cope with...< ...
    Zetr0 Zetr0 September 2011 Hardware
  • +2 OverheatingMust first give thanks to Dazza75 for supplying me a replacement +2 however it seems to be overheating and corrupting graphics in games making them u…

    ... attach the regulator to the heat-sink, from there we can begin ... if its CPU, Memory or ULA.
    Zetr0 Zetr0 June 2012 Hardware
  • ZX Spectrum and add-on temperaturesImre Jakli from Hungary sent me some interesting pictures which I think are worth to share. These are about temperatures he measured with a modern to…

    ... for cooking with ISSUE 1 ULA. Anyway the experiment is running ... have installed a DIP40 heat sink on the ULA and waiting for warming ...
    jimre jimre May 2014 Hardware
  • ZX Spectrum and add-on temperaturesImre Jakli from Hungary sent me some interesting pictures which I think are worth to share. These are about temperatures he measured with a modern to…

    ... is over!

    The heat sink did it's job well ... to put back the heat sink on the ULA permanently, since it spread ... and dissipate well the heat generated ... spot" - as before on the ULA - the temperature was almost evenly ...
    jimre jimre May 2014 Hardware
  • ZX Spectrum and add-on temperaturesImre Jakli from Hungary sent me some interesting pictures which I think are worth to share. These are about temperatures he measured with a modern to…

    ... for cooking with ISSUE 1 ULA. Anyway the experiment is running ... have installed a DIP40 heat sink on the ULA and waiting for warming ...
    balford balford May 2014 Hardware
  • Spectrum 128 malfunctioning with DIVMMCI recently got myself a spectrum 128 (toastrack) and a DIVMMC card so I could load games from it. It all works fine until it has warmed up and then t…

    ... /fischer-elektronik/ick-40-b/heat-sink-dip-glue-on-8-5 ... the appropriate line of the ULA and can produce interesting "graphical ... won't produce too much heat (I measured it). As I ...
    jimre jimre June 2014 Hardware
  • Weird 1982 Copyright message after cap change.Hello All, As mentioned before I had a busted Issue 6 48K Spectrum+, one of the capacitors had leaked, and trashed the keyboard membrane ribbon. Us…

    ... was going to blame the heat sink and that it had a ... the heat sink, I needed to remove the heat sink to get the ULA out ...
    Korinel Korinel October 2014 Hardware
  • Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…

    ... />
    I swapped the ULA over with another machine and ... imply it's not the ULA, however something could be ... with the connections to the ULA...

    Would it ... of each pin on the ULA and see if I ... the black probe on the heat sink, power it up and ...
    Korinel Korinel October 2014 Hardware
  • Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…

    ... of each pin on the ULA and see if I see ... signals on most of the ULA pins, so the meter will ... the black probe on the heat sink, power it up and touch ... as common or ground). The heat sink is such a place (as ...
    1024MAK 1024MAK October 2014 Hardware
  • The Spectrum Resuscitation ThreadKicking off this thread as a place where people who are fixing/restoring Spectrums (or indeed any other piece of related hardware) can show off their…

    ... to replace the 7805, heat sink the ULA and see if there is ...
    Will Woodvine Will Woodvine February 2015 Hardware
  • Memory and Replacement ULA modules.Thought you might like to see my future proofed 48k version 6A with some upgrades fitted. Has had the following... Recap. Traco Power TSR 1-2450 p…

    To really future proof it, I would suggest you add a heat sink to your ULA

    EDIT: wait, you replaced the ULA too :).
    RMartins RMartins August 2016 Hardware
  • Heat-sinking the spectrum 48+ :| [URL=http://s1063.photobucket.com/user/JRT480/media/Fotografia1988_zps5egnygdp.jpg.html][IMG]http://i1063.photobucket.com/albums/t515/JRT480/…

    ... do you think those heat sinks will serve anyway ... the reasons the reg heat-sink stays red hot is ... they wont radiate/convect heat efficiently if at all ... insert temp probe under the ULA say, reseal the hole, ... is, without the reg heat-sink hogging the limelight.
    moggy moggy October 2016 Hardware
  • Heat-sinking the spectrum 48+ :| [URL=http://s1063.photobucket.com/user/JRT480/media/Fotografia1988_zps5egnygdp.jpg.html][IMG]http://i1063.photobucket.com/albums/t515/JRT480/…

    ... do you think those heat sinks will serve anyway ... the reasons the reg heat-sink stays red hot is ... they wont radiate/convect heat efficiently if at all ... temp probe under the ULA say, reseal the hole ... is, without the reg heat-sink hogging the limelight.[/quote]< ...
    Renegade Renegade October 2016 Hardware
  • Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …

    ... , strictly speaking ,as very little heat is generated by a switching ... Traco CAP protector" stops the heat sink swinging around .Without it the ... in retaining it for future ULA cooling ( but this aspect needs ...
    harriusherbartio harriusherbartio April 2017 Hardware
<1234567…34>

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