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ZX Spectrum 48K AV IssueOK so I dugout my old 48K Speccy today and decided to AV mod it. I did the mod (pretty easy) but the picture I am getting is this. [url=http://posti…
... start off by replacing TR4 (replacement would be either a ZTX651 ... .com/watch?v=IzgCmldm2H4"]this video[/URL].
If ... then replace the electrolytic capacitors (video [URL="https://www.youtube.com ... here sells a lower RAM replacement module.
... -
Differences between 128k+ and +3 RGB video circuitsHello, Have a bit of a dilema with some strange video results on my +3. Here's my setup: I have a RGB Scart to Component converter that is hooked up…
... /> Also there is no composite video on pin 1... Composite sync ... use that pin for composite video.
I just had ... :/
It was the C8 capacitor right below IC1. I replaced ... /> Lights come on but no video or sound.
Tried replacing ... -
Hardware with ULAplus supportFollowing on from the emulators thread I thought it might be worth listing the hardware that I know of that supports ULAplus. I know there's at least…
... ULAplus[/url] FPGA/CPLD plugin replacement
[url="http://spectrum.alioth ... .html"]Clash Basher[/url] external video interface
[b]Clones ... -
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…
... there is a fairly big capacitor that I should also consider ... did in the power supplies video. Otherwise, it'd have to ... -
What if Sinclair had released a 16 bit Spectrum?Had Sir Clive not wasted his companies money on the white elephant that was the C5 and instead focused on competing with his rival computer manufactu…
... no direct access to the video RAM.
Anyway, in ... you'd see a massive improvement, despite the hardware being the ... -
The ULA6C001E-5...Hi everybody, I have been continuing my Quest for the Holy ULA, and have today taken delivery of a ULA6C001E-5. Now, the -6 was used in Issue 3 boar…
... one, which definitely has a replacement ULA, I have no reason ... and the resistors in the video circuit are configured for 6C ... -
New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…
... a rather over engineered composite video mod.[/QUOTE]
This ... a PAL or NTSC composite video signal over a 10m long ... this approach to a single capacitor a simple wire or even ... -
New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…
... or capacitor is needed. But you won't find a video op ... computer with a baseband composite video output. And I don't ... -
New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…
... use a sufficiently large value capacitor and ignore the problems :lol ... at the ones with external video inputs. So it's not ... -
Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…
... use) and as the only video output was the dreadful UHF ... " for a "decoupling" capacitor. A 47nF ceramic disc capacitor is not that ... -
Next step for fixing my speccy?Hi guys, I've picked up my faulty Spectrum aiming to fix it. So I followed the excellent JouledperCoulomb videos on Youtube for the basics and I am …
... and have watched Zorn's video's and have some idea ... 't know what an electrolytic capacitor is, leave well alone and ... -
Next step for fixing my speccy?Hi guys, I've picked up my faulty Spectrum aiming to fix it. So I followed the excellent JouledperCoulomb videos on Youtube for the basics and I am …
... and have watched Zorn's video's and have some idea ... 't know what an electrolytic capacitor is, leave well alone and ... -
Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…
[QUOTE=balford;787940]Any improvement in the picture quality?
... /> I have done the s-video mod on this spectrum and ... use. Perhaps when using composite video the results are better (composite ... video mod softens the screen while ... -
Hardware with ULAplus supportFollowing on from the emulators thread I thought it might be worth listing the hardware that I know of that supports ULAplus. I know there's at least…
... ULAplus[/url] FPGA/CPLD plugin replacement
[url="http://spectrum.alioth ... .html"]Clash Basher[/url] external video interface
[b]Clones ... -
'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…
... is to remove C47. A replacement capacitor is soldered elsewhere on the ... -
'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…
... .com/watch?v=IzgCmldm2H4"]this video[/URL] although I'm sure ... to what's in the video since my meter doesn't ... likely route is to buy replacement components and try and put ... -
'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…
... to supply +12V for the video circuits ([URL="http://uk.farnell ... of Zorn's lower RAM replacement modules
[/LIST]
With ... -
Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…
... make a simple emitter follower video buffer (like the type used ... the Y video signal and the output via a capacitor (22uF, ... emitter) to your TV composite video input. See if this ... the transistor modification minus a capacitor (didn't have anything suitable ... -
Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…
... composite signal. The "Y" video is a separate signal direct ... It only carries the monochrome video (no colour) and is ... 100uF electrolytic capacitor, with the negative side being the video output. ... monochrome signal by dropping the capacitor, have I done something ... -
Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…
... 100uF electrolytic capacitor, with the negative side being the video output. I ... monochrome signal by dropping the capacitor, have I done something wrong ... -
Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…
... I first performed the composite video modification, a little lighter, but ... to pin 17, without a capacitor, which looks much like yours ... is something wrong with the video circuit somewhere.
[IMG ... -
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…
... clean supply for the LM1889 video chip.
C44 is ... put a 100 nF multilayer capacitor in parallel with C44. Now ... 4116 RAMs, a 100 uF capacitor between pin 8 and ground ... -
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…
... position of U8 (lower RAM = video file).
Actually I used ... be removed by adding a capacitor of 1 nF from this ... ground. I soldered a SMD capacitor (series 0805) between pins 14 ... after inserting the 1 nF capacitor:
[IMG]http://www.truppel ... -
Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…
... , as I've received a replacement LM1889 and dropped it in ... portable TV using a composite video modification, but it will not ... -
'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…
... as described in the YouTube video (initial tests..) with my Multimeter ... per the instructions in that video and these readings seem to ... ; .646
RE: buying replacement chips.. I'm happy to ... -
48k TV IssuesHi all Quick question, how can i improve my 48k picture? (without composite mods...) currently it looks like this: [IMG]http://s26.postimg.org/oox…
... [/img]
Great picture improvement but... I've got a ... hard to see from this video but I have developed a ... screen down.
the video:
[url]https://www ... -
Studio Ghibli ReviewsThis thread covers my short reviews of the films from Studio Ghibli, the most revered and well-known anime studio in Japan - and related films. The l…
... /> [b]22. Iblard Time - 2007 Video[/b]
A half ... -hour direct-to-video animated short film reminiscent of ... and is a huge, HUGE improvement over the lacklustre and lackadaisical ... -
Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …
... (they are connected) of the video IC LM1889 to check the ... you can find at the capacitor C45. )If there is that ... -
Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …
... (they are connected) of the video IC LM1889 to check the ... you can find at the capacitor C45. )If there is that ... -
Speccy Vs Amstrad CPC Vs C64I hope no one minds me posting this here as well as in the announcements section. I'll delete it if there is a problem. It's childish fun but can I …
... beast. Still, there is no replacement for the SID...[/QUOTE]
video chip that can do a ...
