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Burned finger temp on rubber 48k heatsink normal?Ok so i opened it up because a few keys started to act up and i noticed that after burning my hand the heatsink was that hot i could actually smell t…
... it depends on what a capacitor does on a circuit board ... replace caps on a switching power supply board (monitors and LCD TVs ... -
Burned finger temp on rubber 48k heatsink normal?Ok so i opened it up because a few keys started to act up and i noticed that after burning my hand the heatsink was that hot i could actually smell t…
... remember that the original Spectrum power supply was a
primitive ... the
output, and a capacitor to get rid of the ... ripple).
Such a supply gives a higher-than-nominal ... bringing down to 5V the power supply?
In that case, ... -
Burned finger temp on rubber 48k heatsink normal?Ok so i opened it up because a few keys started to act up and i noticed that after burning my hand the heatsink was that hot i could actually smell t…
... remember that the original Spectrum power supply was a
primitive ... feed the supply current to a large electrolytic capacitor, the capacitor will charge ... up and store electricity. The capacitor can then supply ... -
ZX Spectrum PSU CasesI have 4 x original UK ZX Spectrum (rubber key type) power supply cases (no innards) and 1 x EU version. Does anyone want them - ?1 each plus postag…
... 4 x original UK ZX Spectrum (rubber key type) power supply cases (no ... -
Seen any ebay madness?? post it here !!!What with some high prices fetched on speccy games over the past few days , thought it might be an idea to keep a WOS record of some of the higher fi…
... [url]http://www.ebay.co.uk/itm/221535069657[/url][/QUOTE]
UK model. I believe the ... , like all UK models, so maybe a UK board inside. ... -outs compared to the UK model and used a ... has a UK keyboard. Wrong Spectrum 48K power supply with it too ... -
'Interesting' Issue 2 modSo I've been lurking on this forum for a while and I've got to the point where I want to see if I can repair a speccy.. so I bought me a 'broken' one…
... the on board switched mode power supply circuit has been upgraded, part ... to remove C47. A replacement capacitor is soldered elsewhere on the ... -
Early ZX80/81 RAM Pack???Hey all I got given this RAM pack... It doesn't work (i know why now) but compared to my RAM pack this one is really strange... Is this a ZX80 RAM p…
... (the on-board switch mode power supply) is substantially different to the ... . This applies to both the ZX81 RAM pack and Spectrum versions ... -
48k Spectrum "Jail Bars" Removal?Hi all Just curious I think I saw a post here about the bars that go down the screen on some 48k's I think he referred to them as "jail bars". Any…
... supposed to provide a clean supply for the LM1889 video chip ... put a 100 nF multilayer capacitor in parallel with C44. Now ... of new capacitors to restore power supply original specs.
2 ... 4116 RAMs, a 100 uF capacitor between pin 8 and ground ... -
'Interesting' Issue 2 modSo I've been lurking on this forum for a while and I've got to the point where I want to see if I can repair a speccy.. so I bought me a 'broken' one…
... [URL="http://www.zxshed.co.uk/sinclairfaq/index.php5?title=Replacement_Components ... with the new coil, power socket, capacitor for C47 and the regulator ... -
Replacement Rubber FeetAs most of you will know, I already stock the rectangular solid rubber feet for the base of the rubber key ZX Spectrum, ZX81, ZX Power Supply and ZX …
... the rubber key ZX Spectrum, ZX81, ZX Power Supply and ZX Printer. Incidentally ... -
Modern PSUHello everyone, I'm looking for a modern PSU for my Spectrums and my dual set of 3.5'' floppy drive+HxC floppy emulator. The one for Spectrum should …
... , Diode Bridge and a capacitor. Every Spectrum user will ... have used a PC Power Supply a few years ago ... the Spectrum as all the supply voltages are there (+12, ... with one or two power supplies. I know with ... I have one standard power 12V supply with a 9v regulator ... -
Seen any ebay madness?? post it here !!!What with some high prices fetched on speccy games over the past few days , thought it might be an idea to keep a WOS record of some of the higher fi…
[url]http://www.ebay.co.uk/itm/Sinclair-ZX-Spectrum-power-supply-/301359518472?pt=UK_VintageComputing_RL&hash=item462a6d5308[/url]
:lol: -
Seen any ebay madness?? post it here !!!What with some high prices fetched on speccy games over the past few days , thought it might be an idea to keep a WOS record of some of the higher fi…
... ://www.ebay.co.uk/itm/Sinclair-ZX-Spectrum-power-supply-/301359518472?pt=UK_VintageComputing_RL ... -
How important is the 9V line?I'm in the middle of resurrecting an Opus Discovery. The transformer is gone so Im using a small switched mode PSU from a PC. My plan is to bypass …
... ="http://www.ebay.co.uk/itm/251666377901"]http://www. ... ebay.co.uk/itm/251666377901[/URL]
power-supply-voltage-regulating-reducing-module ... com/p/20083-adjustable-power-supply-voltage-regulating-reducing-module ... -
Pics of your Speccy set-up?Had a look and can't seem to find a thread on this. - Be interesting to see pic(s) of everyone's "go-to" Speccy, the one that they use regulary. I'…
... differences in TVs and power voltages here in the ... s not as authentic as UK hardware, then I cannot ... (2010 and 2020). The power supply You buy separately and it ... - is even easier to power because it uses micro-USB ... power-supplies (like for the ... -
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…
... on the heat sink, power it up and touch ... But short between a power supply or 0V/ground pin and ... URL]http://www.maplin.co.uk/p/ts7805cz-1a-positive-fixed ... URL="http://www.maplin.co.uk/p/ts7805cz-1a-positive-fixed ... "]http://www.maplin.co.uk/p/ts7805cz-1a-positive- ... -
Replacement PSU for 128+Hi all! I am getting tired of the old heavy Spectrum 128+ PSU of mine. Could u point me to a modern PSU in ebay that can replace the old brick? Th…
... .co.uk/itm/9V-2A-2000mA-AC-DC-Switching-Adaptor-Power-Supply-Charger ... [URL="http://www.ebay.co.uk/itm/InLine-Switch-Torpedo-Switch ... />
I use such a power supply myself and 2A will happily ... power everything from a 16K Spectrum ... -
Silly question I know..Just started checking my old computers and started with the ac/dc power adaptors. The 9 volt output is showing 12 to 13 volts The 12 volt output is…
... original Sinclair ZX Spectrum mains power supply / adaptor is an unregulated type ... across the large electrolytic "smoothing" capacitor will charge up to the ... RMS voltage (because the power in a resistor at this ... to the same level of power from a battery) not ... -
ZX81 Power SupplyI have a ZX81 with the original 0.7A power supply. I know that this has trouble running many add-ons and was seeking advice on a suitable replacement…
... have a ZX81 with the original 0.7A power supply. I know ... br /> Any unregulated DC power unit with an output ... or a regulated DC supply with an output voltage ... it could operate a ZX81, ZX Printer and 16k ... you intending using with your ZX81?
[B ... -
Problem with ZX Spectrum 128k +2B Tv Output and RGB imageHello, Last week I've been ofered with a ZX Spectrum 128k +2B but I have a problem with the tv out (through RF modulator) .The image is clear on the…
... )?
The +2A / +2B power supply is not hard to fix ... /> Info on the +2A / +2B power supply [URL="http://hardware.speccy.org ... one), check the voltage across capacitor C1 on both the DC ... -
Favourite Speecy HardwareHi, Just wondering what your favourite piece of Spectrum add-on hardware is/was? How about the Alphacom thermal printer? Or the Currah Speach thin…
... the improved power supply, that I still use with the ZX81.
Guess the video faultI've two dead flesh Spectrums, one a 16K issue 2 outputting white with a tinge of blue (not as extreme as photo shows) with two pink horizontal lines…
... .
Are the supply voltages (the +9V, the +5V ... to remove noise from the power supply rails, and the second image ... that a semi-bad electrolytic capacitor can cause.
... that there is a non-capacitor fault causing these symptoms. But ...New Raspberry PiThere's a new raspberry Pi coming out, faster quad core processor and 1Gb ram ! [url]http://www.bbc.co.uk/news/technology-31088908[/url]
... it's title of the UK's biggest selling computer.
power supply and cables.Replacement PSU for 128+Hi all! I am getting tired of the old heavy Spectrum 128+ PSU of mine. Could u point me to a modern PSU in ebay that can replace the old brick? Th…
... take a 9v centre negative supply (so all the way from ... ://www.ebay.co.uk/itm/9v-2a-center-negative-power-supply-adapter-with ...Just Speccy 128Wow, got home and found that I have received a parcel from Zaxon containing a Just Speccy 128 PCB :-) B-)<br>Now all I need is a parts list, th…
... not all) decoupling for the power supply rails. I have not yet ... 50V Y5V-Suntan-Axial-Ceramic-Capacitor-11-3560100nF 50V Y5V-P ... -5-08mm-Suntan-Radial-Ceramic-Capacitor-11-3454100nF 100V X7R-P ... -2-54mm-Suntan-Radial-Ceramic-Capacitor-11-3442For the inductor, I ...not working issue 3Hi all, I received this mobo from ebay, after start i have this on screen [img]http://forest.no-ip.org/wos/issue3_01/20150728_135908.jpg[/img] …
... without all of the necessary power supply voltages presented to the lower ... and each of the three power supply rails. It's quite possible ... IC or a dead electrolytic capacitor is overloading one of ... developed a short between its power supply rails with them in ...where to find Harlequin rev. F all mods till now ?Hi all :) because no more broken speccys around for now, is time to build first of my Harlequin's rev F, I looking in forums and look at Ingo posts…
... board
* solder a capacitor of 10 pF from the ... connect a variable power supply and begin to supply the board with an ...MemoPak 16KHere is a reference photo of the hardware in question. [img]https://dl-web.meocloud.pt/dlweb/download/WOS/postdata/MemoPak_16k.jpg[/img] The only…
... /> can join up the power supply to your ZX81."
The problem ...Testing ZX81 Power SupplyForgive the total noob question, but I have a ZX81 UK 700 PSU (and no ZX81) - how would I go about testing it is giving the correct output? I have a…
... :
http://www.ebay.co.uk/itm/Ceramic-Wirewound-Crossover-Resistor ... a load on the unregulated power supply that draws an appropriate amount ...Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... the Discovery is the ZX power supply going through the single 9V ... ZX power supply connector between the track that goes from the big capacitor ...
