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The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... 're there for the 5v power supply filtering network, only C4, on ... 't make much. A smaller capacitor makes the job as stated ... -
Speccy PSUI've grabbed a Speccy PSU from fleabay and it looks like a Speccy Plus PSU. After testing it with a multimeter it's kicking out 12V rather than the …
... voltages without load on the power supply were between 11.33 and ... ), i.e. diode bridge and capacitor, you should measure the RMS ... without load (diode bridge and capacitor), then you will measure the ... size and quality of the capacitor and the current drawn. If ... -
Does anyone still have the same speccie?The survey into the Games of the Year - and the question about what system you were playing 20 years ago - got me thinking. Has anyone on the forum …
... and was fixed in Birmingham (UK) at some well advertised place ... happy hours together although the power supply exploded so I am using ... -
Multiface +3 AdviceHi, New to the forum after resurrecting my +3 and looking for a bit of advice on the Multiface 3 please. Quite simply is it worth investing in for…
... : [URL="http://www.ebay.co.uk/itm/AMSTRAD-SPECTRUM-3-COMPLETE ... -DRIVE-RIBBON-CABLE-POWER-SUPPLY-/121075507228"]http://www.ebay.co.uk/itm/AMSTRAD ... -5-DISK-DRIVE-RIBBON-CABLE-POWER-SUPPLY-/121075507228[/URL]
With ... -
Improving Composite Output of 48K SpectrumI've been playing around with this Spectrum 48k I got inside a dK'tronics keyboard, because well I've already got two working other ones so why not..…
... the +12V supply comes from a switch mode power supply, a filter network ... by fitting a larger value capacitor (and as modern electrolytic capacitors ... . Hence the "in-line" "coupling" capacitor.
I hope this ... -
+3 Audio hates me with a passionHihi Since nobody seemed to have a spare +3B board, I've been trying to replace the audio entirely, aiming for a speaker inside the machine Since p…
... is C37, a 100nF capacitor connected between the collector of ... amplifier) and ground. This capacitor forms a low pass filter ... for a smaller capacitor. The best standard value capacitor to let ... potential divider driven by the power supply. Whereas the pdf shows ... -
Retro Computing in the USA.As some of you know I am planning on emigrating to the USA this Summer and I'm debating what I should take with me and what I should sell. As for Si…
... picking up a 120v 2A power supply here for $20 or so ... I'd bother with the ZX81...again Timex Sinclair 1000s are ... -
1x XC9572XL or 2x XC9536XL?I'm working on some projects which do not settle with only one XC9536XL CPLD. Main reason is of course the lack of user pins on the XC9536XL, I need …
... from the device. Since the power supply to the chip (ground and ... , the inductance of the power and ground supplies becomes an ... of inductance between the capacitor and the power pin) and for high ... this - solid ground and power planes are very helpful, also ... -
Price of nice condition issue 1 48K Speccy?I recently came across a 'really great example' issue 1 48K Spectrum on the Internet for ?250 with RF Cable, Mic ear Cable, PSU, Manuals and the Hori…
... were around the on-board power supply, display electronics and ULA. The ... problems with the on-board power supply and colour stability in the ... a new display circuit and power supply circuit. Also the ULA was ... working ZX80 and a few ZX81's. I still need a ... -
CapacitorsSorry, another question... I've done a bit of looking around, although after a couple of beers this may not have been as systematic as usual, but I …
... on the power supply. If the load is small, then the capacitor can ... discharge cycle of a typical capacitor. The charge cycle will ... (ESR) of the specific capacitor and the discharge rate will ... a capacitor connected and there is a load on the power supply. With ... -
Issue 3 board... How to resurrect?Dear Everyone, Now I have a working 48k Issue 3, a sort of working Speccy+ (still having problems with the keyboard, more of that in another post) a…
... not always imply that the power supply is faulty. It is always ... a ripple waveform on the supply lines without an oscilloscope ... service manual. It is mainly capacitor and resistor values that need ... there is also an additional capacitor that needs to be soldered ... -
Who can identify this mystery box?While going through boxes of Spectrum accessories, I came across a small silver box with power, Mic, Ear, RX In, and TX ports, and a switch that says…
... produced this cable (but no power supply):
[IMG]https://dl.dropboxusercontent ... ][/b] If anyone in the UK wants the box for the ... -
Is This PSU Useable on the Speccy?I just got my Speccy and the PSU has had some 'work' done to it. Somebody has added an extra length of cable on it but rather than soldering or crim…
... , a diode bridge and smoothing capacitor is never exact. It also ... forgiving with a bad external power supply as most of the regulation ... -
Yet another glitchy graphics 48kHeyo, I'm new both to the forums (sorry if this is the wrong forum) and to Spectra I'm afraid, picked up a 48k from a steam fair sale thingy (not th…
...
[QUOTE=CaptainHayashi;701778]The power supply appears to have been DoA ... to ordering a +2 power supply for it. Now it' ... ;701778]Since the previous power supply was KO'd that ... check the voltages, replace any capacitor that looks remotely dodgy, ... -
Spectrum 48k PSUHi, can anyone suggest an alternative off the shelf power adapter that will be compatible with the ZX Spectrum 48k? I've just picked an old machin…
... polarity: [URL="http://uk.farnell.com/multicomp/mcext9v15wc2/power-supply-15w-c8-inlet ... -9v/dp/1827429?Ntt=MCEXT9V15WC2"]http://uk ... .farnell.com/multicomp/mcext9v15wc2/power-supply-15w-c8-inlet ... -
Spectrum +2(grey) rf problem not tuning inHi lads, first of all a quick intro. Im a speccy enthusiast in Ireland, had my first speccy when i was seven in 1987(grey +2). Eventually it got repl…
... -Board-3W-3W-USB-Power-Supply-DC-5V-UK-SELLER-649-/230886667740?pt ... output leads, plus a 5V supply, and you're good to ... -
ZX Spectrum Stuff I am sellingSelling all these games in 1 bundle for the sum of ?20 .. postage to be worked out once I know who is interested. Small Case Renegade Enduro Racer T…
+2 grey Power Supply ?5 (?4 postage UK heavy item)
Bought this ... Scart Cable ?5 (?2 postage UK)
Get the best possible ... Converter Cable ?5 (?2 postage UK)
A handy little cable ... -
Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... C8 until I get another capacitor kit in.
ii. ... replaced C27 with a 1uF capacitor, but this was rated at ... critical, as this capacitor is a power supply line decoupling capacitor. I don't ... could buy a 1uF electrolytic capacitor rated at 10V, that would ... -
Issue 2 crashes after about 30 minsHi Guys, I have an Issue 2 zx spectrum that seems to get graphic corruption after about half hour of playing, then finally falls over and crashes. …
... the discharge of the capacitor in the external power supply and if you ... measure the voltage of the power supply under load, then you will ... voltage on the supply due to the capacitor discharge. I had ... the input waveform of the supply into the Spectrum coming ... -
Issue 2 crashes after about 30 minsHi Guys, I have an Issue 2 zx spectrum that seems to get graphic corruption after about half hour of playing, then finally falls over and crashes. …
... discharge of the capacitor in the external power supply and if you ... measure the voltage of the power supply under load, then you ... voltage on the supply due to the capacitor discharge. I had ... whatsoever to do with any capacitor connected across the output. ... -
Issue 2 crashes after about 30 minsHi Guys, I have an Issue 2 zx spectrum that seems to get graphic corruption after about half hour of playing, then finally falls over and crashes. …
... measure the voltage of the power supply (as in this case a ... diode bridge with a smoothing capacitor on the output side ... same vale as the discharged capacitor and will start to charge ... calculated value capacitor. The problem with the Spectrum power supplies is ... -
Issue 2 crashes after about 30 minsHi Guys, I have an Issue 2 zx spectrum that seems to get graphic corruption after about half hour of playing, then finally falls over and crashes. …
... direction of "simple" unregulated dc power supply theory...
... not forgetting the reservoir capacitor(s): [/B]Used to ... partly discharge the reservoir capacitor(s) between the " ... somewhat (amount depends on capacitor value and load current).
48k+ Power Supply quickieGuys, Can someone tell me if I can safely use the power supply of the 48k+ in a 48k? My guess is yes, but I don't want to do something I will regre…
... damn power supply in portuguese online sales sites (most of the uk ebay ...Another broken SpeccyHi all I have been given another ZX Spectrum, this time it has a really odd problem as you can see in the video: [URL="http://youtu.be/ZOSiBEYQD7w"…
... Spectrum's internal switch mode power supply system is broken.
First ... , do not power your Spectrum for more than ... be damaged if the -5V supply is missing.
Second, are ... and plus boards, TR4 (on UK made boards this is a ...First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
... forget the large electrolytic capacitor in the mains power supply unit...
First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
... forget the large electrolytic capacitor in the mains power supply unit...[/QUOTE]
First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
... the large electrolytic capacitor in the mains power supply unit...[/QUOTE][ ... 105?C Radial Electrolytic Capacitor Rapid [URL="http://www ... 105?C Radial Electrolytic Capacitor Rapid [URL="http://www ... connected to the computer) power supply output voltage can be ...I know it's part ZX81 but what's the rest of it?You can see the ZX81 motherboard in the corner but I have no idea what the rest does, it powers up but I haven't managed to get the screen to tune in…
... /> - A ZX81 (obviously)
- Replacement keyboard
- In-built power-supply
- The ... the boards together to the ZX81's own edge connector, and ...I know it's part ZX81 but what's the rest of it?You can see the ZX81 motherboard in the corner but I have no idea what the rest does, it powers up but I haven't managed to get the screen to tune in…
... have been removed from the ZX81 board, and wired through the ... case, possibly routed from the power supply. Maybe these are some sort ... of fixed voltage (9V? 12V?) power supply for external devices. Though using ...Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…
... />
[URL="http://uk.rs-online.com/web/p ... /cplds/6904251/"]http://uk.rs-online.com/web ... ground bounce issues or power supply issues not being able ... to have solid ground/power planes everywhere around ... which is connected to the power supply.
...
