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kempston and/or psuhi there, just wondering if anyone had a spare kempston adaptor they wanted to give a good home? i will pay a couple of quid + postage for it, and …
... the plug off your +3 PSU! (I thought it was moulded ... mine had blown a power regulator, It's a very simple ... find the pinouts for the PSU din plug :-( I thought they ... -
kempston and/or psuhi there, just wondering if anyone had a spare kempston adaptor they wanted to give a good home? i will pay a couple of quid + postage for it, and …
... the plug off your +3 PSU! (I thought it was moulded ... mine had blown a power regulator, It's a very simple ... find the pinouts for the PSU din plug :-( I thought they ... -
Best replacement for ZTX650?What is the best replacement transistor for the obsolete ZTX650? I've read that TIP31 will do the trick. Is there a decent equivalent from the BC or …
... on a 48k as a replacement? it looks a bit weird ... the same transistors and voltage regulator (7805) as a 48k (it ... -
Best replacement for ZTX650?What is the best replacement transistor for the obsolete ZTX650? I've read that TIP31 will do the trick. Is there a decent equivalent from the BC or …
... the main point of that PSU circuit is to supply the ... of components to make the PSU circuit more reliable. Have you ... idea how can i get replacement ROMs, original or flashed?(as ... -
Issue two picture qualityDoes anyone know if issue two and earlier spectrums have worse picture quality (in general, beside colours) compared to issue 3 and later? I mean on…
... get +5V directly from the regulator, via a 1K resistor, and ... , from the Spectrum's internal PSU circuitry. Don't use the ... -
Just got a Spectrum +2BThis is the first Spectrum I've ever used or owned. I got it without a video cable or power supply. I wired up a proper video cable, and I altered an…
... by placing an appropriate voltage regulator downstream of the cap (for ... you need 9v, and the PSU makes 12v, you can put ... output, then a 9v voltage regulator downstream of the capacitor. So ... below the minimum voltage the regulator will regulate - which in the ... -
Just got a Spectrum +2BThis is the first Spectrum I've ever used or owned. I got it without a video cable or power supply. I wired up a proper video cable, and I altered an…
...
If the Speccy's PSU is rated at 2A as ... a home made PSU that uses a regulator rated at 2A ... printed on the Spectrum PSU is the limit rather ... ) has its own voltage regulator, so the whole exercise ... the Spectrum's internal regulator will take care of the ... -
Just got a Spectrum +2BThis is the first Spectrum I've ever used or owned. I got it without a video cable or power supply. I wired up a proper video cable, and I altered an…
... ]If the Speccy's PSU is rated at 2A ... a home made PSU that uses a regulator rated at 2A ... printed on the Spectrum PSU is the limit rather ... one) has its own voltage regulator, so the whole exercise ... and the Spectrum's internal regulator will take care of the ... -
Dead Spectrum +Hi all, I've recently dug out my old Spectrum + with the idea of repairing it. When I last looked at it, when I was much younger, I was soldering a …
Middle pin of the voltage regulator is ground.
The ... /> Power - Centre pin of the PSU is negative, the outside barrel ... -
Dead Spectrum +Hi all, I've recently dug out my old Spectrum + with the idea of repairing it. When I last looked at it, when I was much younger, I was soldering a …
... present, see "test the onboard PSU" and see how to test ... the PSU section of the board. If ... .
Test the onboard PSU - do this by checking that ... diode etc etc. Check the regulator - replace if output is all ... -
toasted soeccysHello, ive jsut bought a pair of speccys on ebay (one 16k issue 2 & a prob 48k issue 3) unfortunaly the genius who sold them tried to see if the wor…
... present, see "test the onboard PSU" and see how to test ... the PSU section of the board. If ... .
Test the onboard PSU - do this by checking that ... diode etc etc. Check the regulator - replace if output is all ... -
TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…
... />
The only way the PSU is at fault is if ... /> 13.30 Volts from the PSU offload, drops to 11.73V ... , with 4.95V out the regulator. Now that should be more ... -
5v Transformer.I've got a 5v 3A transformer, would this be ok to use with two 3.5 inch floppy drives?
... 't want is for the PSU to deliver 5V only when ... drawn from it).
PSU's that are not regulated ... /> If you are sure that PSU is 5V off load as ... use a twin 7805 based regulator and power it with a ... -
48K Speccy not workingHey, A few months ago (hope it´s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…
... and transformer in your PSU died. It will be ... easier to find another 9V PSU.
3. If ... okay, connect your disassembled PSU to the AC power and ... , check electronics in your PSU. I have never seen original ... it and buy a replacement from Maplin or whatever.
48K Speccy not workingHey, A few months ago (hope it´s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…
... photo i see a power regulator in the top right ... s really not mess with PSU's internals, we don ... least my friend's PSU of his original Spectrum 128 ... + outputs 9V, +3 PSU really gives +12V for disk ... powering it up (connecting the PSU and testing voltage on it ...Should +2's Be left turned on to save games?Hi, Forgive me for asking you guy's a daft question but, I was just wondering what you think about leaving a Spectrum +2 turned on all the time. The …
... I had a suitable 9Volt Regulator:lol:
But I ... need the 9 volt regulator, the normal Speccy PSU is unregulated and ...Computer crashes on boot problemHelp, I need help !! My Computer crashes randomly, sometimes just after start-up sometimes it will last for ages. I then get the Blue screen with…
... too much ripple because the PSU is suffering capacitor plague.
I had a PSU commit suicide and multiple murder ... of resistors exploding in the PSU, leaving a large scorched area ... about the sound card - the replacement motherboard didn't have any ...ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …
... the fault lies elsewhere (the PSU you bought not supplying the ... anyone know if there are replacement ULA chips?I know that ... possibility to rule out first (PSU) before you start being suspicious ...Spectrum+3Hi all, Got my Spectrum+3 from eBay this afternoon. Powered it up to find the drive belt is a no go. So I need a drive belt, Ok easy to get hold of n…
... MUST have it's own PSU - don't be tempted to ... up on the +3's PSU, it won't like it ... ! A seperate PSU is a doddle to set ... up though, a 9V PSU from ebay and a 5V regulator :)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…
... I can offer as a replacement if yours isn't a ... the other fault was the regulator heatsink touched the metal case ...ZX81 power supplyFriend gives me ZX81 without power supply and i want to test whether he work or not. Can i use Spectrum p.supply for that purposes? I dont want to d…
... the ZX81 has a 7805 regulator to bring the input down ... of either a genuine ZX81 PSU, or a regulated 9VDC configurable ...ZX81 power supplyFriend gives me ZX81 without power supply and i want to test whether he work or not. Can i use Spectrum p.supply for that purposes? I dont want to d…
... then.
The Spectrum PSU generally speaking has an ouptut ... out here. Since the Spectrum PSU has a higher load capacity ... , and the small switch mode regulator in the expansion may not ... a 7809 regulator - it MAY work with a Spectrum PSU, but since ...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…
... Spectrum project - not a ULA replacement, but for a CP2200 based ... more efficient than a 7805 regulator, and will generate very little ... a small set of DRAM replacement daughterboards - one for lower RAM ...PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …
... case.
The Spectrum PSU puts out around 13V - remember ... that the PSU rating (9V @ 1.4A) is ... anyway.
The 7805 regulator needs at least 7V to ...PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …
... . I hooked up an ATX PSU to a grey +2 once ... got myself a 7809 (9v regulator), supplied it with +12v and ... removed the +5v regulator and connected the PSU's +5v to the ... an MB02 hooked up the PSU which also worked fine. And ...Interesting Ebay initiative, if u have unfair neg feedback givenI have just recieved an email from Ebay saying they are starting whats called, the Community Court, if u feel someone has left u unfair neg feedback …
... someone who sold me a psu - it didn't work on ... - return for a refund or replacement". Not sure how that is ...Interesting Ebay initiative, if u have unfair neg feedback givenI have just recieved an email from Ebay saying they are starting whats called, the Community Court, if u feel someone has left u unfair neg feedback …
... someone who sold me a psu - it didn't work on ... - return for a refund or replacement". Not sure how that is ...Issue 1 80K SpectrumHere's the other Spectrum I acquired last weekend. It's an [URL="http://www.drumfu.com/Issue1.jpg"]Issue 1[/URL] with an [URL="http://www.worldofspec…
... as the PSU was missing. I've got a replacement being delivered ...Composite Video output problemHi everyone, I?ve got a problem that?s really bugging me. I have one Spectrum 48K and one Spectrum +3, both with Composite Video output modification…
... ´m wrong here, but the PSU delivers 9V and 1,4A ... the PSU. There seems to be a problem with the 7805 regulator ...Composite Video output problemHi everyone, I?ve got a problem that?s really bugging me. I have one Spectrum 48K and one Spectrum +3, both with Composite Video output modification…
... ?m wrong here, but the PSU delivers 9V and 1,4A ... the PSU. There seems to be a problem with the 7805 regulator ... is pushed through the 7805 regulator which provides a stable +5V ...
