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Sinclair ZX Spectrum FAILS latest radio noise rules SHOCKCan I really be the first to have mention this? Article on El Reg reports: [url]http://www.theregister.co.uk/2012/12/13/sinclair_spectrum_fails_mode…
... are derived off the actual oscillator circuit. [/QUOTE]
What ... -
+2 (Grey) S-video?I have a pretty good Composite/S-video to VGA adapter that does a nice work of running my retro machines on an old LCD screen. However, it looks best…
... /> I used a pcb with AD724 to make Svideo out from ... -
+2 grey rf out problemI got a kind of broken +2. it basically works, but with a annoying rf out problem. When screen goes black (eg. after border 0: paper 0 command) it l…
... that transistor is an UHF oscillator. Moving your finger into this ... area tunes the oscillator. So what you have to ... -
Speccy 48K grey screenGot a issue 2 48K speccy as part of a job lot on ebay, tested it and apart from a duff membrane it appears to be working. However the screen is a gre…
... /> Well it's a crystal oscillator so is supposed to oscillate ... -
Weird problem with WAV'sI have a (probably) weird problem trying to load games from my netbook with my rubber keyed 48k. If I try to load a WAV file through media player to…
... things).
Third, the chrystal oscillator(s) could have a problem ... -
Fully-addressed devices initiative (FADI)I would like to introduce an initiative for those who create new pieces of hardware containing legacy devices with well-known addresses. It says that…
... to the Spectrum's crystal oscillator.
There will of ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... I'd not built the AD724/5 circuit at that point ... -
TQFP Packaged CPLD, Which pin pitch?A quick question for those of you with surface mount experience. I am currently thinking about building a 128k clone, and hopefully have a bit of fu…
... ]
I use 56MHz oscillator to divide to 14MHz, you ... -
Black and white composite displayJust pulled out an old CRT display and tried my trusty rubber key on it (comp modded), im using one of those scart adapters for an xbox to accept the…
... the TV synchronizes an internal oscillator to.
Now to encode ... the subcarrier to its internal oscillator and measures the difference in ... -
48k + Spectrum Issue 4S Display IssueHi all! Brand new user here. Growing up I had a zx spectrum for a little bit, and recently I have bought a working 48k + Spectrum (Issue 4). I was…
... ]TR4 is part of an oscillator that feeds the small transformer ... -
Composite video for 48k Capacitor orientationHello, My multisystem TV is acting up and I'm unable to navigate the menu to tune in the RF signal for my speccys. However the A/V input still works.…
... suggest stopping the redundant 6MHz oscillator for the FM modulator. I ... -
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…
... ) to handle the power supply oscillator for the lower RAM chips ... -
Converting PAL +2b to NTSC[B]Hello my fellow WoS'ers[/B] I have a strange request for your knowledge and advice. A chap in the US would like to use a Spectrum +2B, however w…
... actually part of a crystal oscillator circuit inside the TEA2000, and ... -
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…
... trim the frequency of the oscillator - you should probably leave that ... -
composite modJust wanted to know would this mod work on a +2a ?
... IC10. This stops the 6MHz oscillator entirely which just removes another ... -
ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…
... a way to breadboard an oscillator to measure it's coils ... -
ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…
... theory of
how the oscillator aspect of this circuit functions ... -
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... RGB (!) and composite (by an AD724). RGB picture has the best ... -
ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…
... theory of
how the oscillator aspect of this circuit functions ... -
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... a few parts as the AD724 that are not so cheap ... -
ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…
... C27 form a self starting oscillator. The exact detail is rather ... -
ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…
... C27 form a self starting oscillator.
/Quote
Shouldn ... -
ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…
... C27 form a self starting oscillator.
/Quote
Shouldn ... -
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
Hi,
I would like a kit (PCB and all components)
Plus AD724 kit
Plus RGB/Scart cable
Shipment to Ireland.
Thanks. -
Corrupt paper on zx spectrum 48kHi. When I power up my spectrum (issue 3) I get the light grey border, but the paper is black and it switches between thin red vertical lines and thi…
... routines? (with a multimeter or oscillator?)[/QUOTE]
Do you ... -
Corrupt paper on zx spectrum 48kHi. When I power up my spectrum (issue 3) I get the light grey border, but the paper is black and it switches between thin red vertical lines and thi…
... routines? (with a multimeter or oscillator?)[/QUOTE]Err, yes and no ... -
ZX Spectrum clock signals comparedI haven't searched for this on WoS; it might have been posted before. But I think it's important info, and can't do any harm to repeat or show from a…
... than adding a simple SMD oscillator running at 4MHz (or faster ... -
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... like to know about:
- AD724 kit
- RGB/Scart cable ...
