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ZX81 internal RAM upgrade?It's only a matter of time before I kill my ZX81 due to this slack ram pack :( Is there a tutorial available that will allow me to upgrade my RAM to…
... some more TLC pokemon's video mod mounted/tuned and a new ... old one distorted the first video line after 30 secs from ... -
ZX48 svideo modI have modded a ZX48 to have svideo output. The end of C65 that goes to TR2 (its an Issue 2 zx 48 ) has been lifted to get Chroma. Luma is taken fro…
... into doing composite and s-video modifications on them.
< ... should be for a composite video signal) and when loaded by ... way to make the composite video mod to the spectrum circuit. It ... you regarding the composite video mod and the s-video mod too so that ... -
TEA2000 mod for better CVBS quality?Has anyone tried this before? :confused: [URL=http://s1063.photobucket.com/user/JRT480/media/Evenmoreperfect_zpse2505ab9.jpg.html][IMG]http://i1063…
The aim of that mod would be to band-limit ... . I've done an s-video mod on a grey +2 and ... -
ZX48 svideo modI have modded a ZX48 to have svideo output. The end of C65 that goes to TR2 (its an Issue 2 zx 48 ) has been lifted to get Chroma. Luma is taken fro…
... way to make the composite video mod to the spectrum circuit. It ... ]
I doubt the mod puts much of a strain ... do know that the composite mod has a DC offset of ... -
Video on single transistor composite video modification for 48K SpectrumsI made a video on the single transistor composite video mod, using an Issue two Spectrum although it applies to all issues. Much better than the sing…
... you get from that mod with only the transistor?< ... as you show in the video the RF modulator is ... to keep both video signals, RF and composite video? Would it ... be okay to share the video signal and +5v feed ... you did in the s-video mod)?
Thanks in ... -
Video on single transistor composite video modification for 48K SpectrumsI made a video on the single transistor composite video mod, using an Issue two Spectrum although it applies to all issues. Much better than the sing…
... you did in the s-video mod)?
Thanks ... resistor in the television composite video input completes the circuit. ... 128K circuit produces composite video at twice the required ... protection. If the composite video output is momentarily connected to ... -
Video on single transistor composite video modification for 48K SpectrumsI made a video on the single transistor composite video mod, using an Issue two Spectrum although it applies to all issues. Much better than the sing…
... you did in the s-video mod)?
Thanks in ... - composite is composite. The S-video version looks a lot better ... modified for S-video originally had a wire composite mod connected to ... modified the rest of the video circuit, turning the composite output ... -
Dot crawl?Hi, As I'm rather new to the hardware of the spectrum, just to confirm: is this video showing "Dot crawl" ? [url]https://www.youtube.com/watch?v=_U…
Great answers! How would one go about increasing ULA clock frequency though? I think I like the S-video mod. Is there documentation? :) -
Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... /> (I did do the Composite Video Mod so the modulator is no ... -
Turning on and off internal speaker?Just wondering if this change could be done. Would it be possible to install just a switch so that one could turn on/off the sound coming from the i…
... previously made alteration (the composite video mod) where I placed a switch ... monitor it delivered perfect monochrome video.
After the upgrade ... to the s-vhs mod I was left with a ... -
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…
... . I used them in that mod because I had some at ... , including an Issue 4S s-video mod. -
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…
... want to do the composite video mod to a 48K. And ... the ways to improve video quality possible to perform ... a 48K with the CVBS mod?
But ... quality picture on CVBS mod could be performed before ... the CVBS mod (or without that mod ever being done ... -
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…
... have to do the s-video mod to my 48k but it ... /> Anyone knows what type of mod was done to the RF ... modulator? Is that the CVBS mod? But so many caps...?:confused ... -
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…
Looks like a rather over engineered composite video mod. -
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…
... over engineered composite video mod.[/QUOTE]
This mod is based on ... a PAL or NTSC composite video signal over a 10m long ... -
Question for ZX81 GurusI have an ISSUE 1 ZX81 with a 2C184E ULA. If I ever need to change it, can I use one of the newer 2C210E ULAs? If I can, are there any other mods th…
... QUOTE]
So a video mod is normally recommended because the ... TV tuners. The video mod / composite video inputs do not have ... the quality of the video mod of course). The theoretically ... automatically estimated from the video signal via the backporch. ... -
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…
... /> I have done the s-video mod on this spectrum and the ... video the results are better (composite video mod softens the screen while s-video ... -
Issue 4S differencesI decided to buy an Issue 4S PCB after reading much about them on here. It was originally in a plus case which didn't come in the sale. I've been run…
... doing a single transistor composite video mod using a BC549, I ... wire composite mod, that's because the Spectrum video circuit ... With a single transistor composite video mod, no further changes are ... that performing the s-video mod according to your videos ... -
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…
What cable dou you use on this s-video mod?
Looks like one of my +2 machines already has this mod plus another in it. But i am not sure what cable to use. -
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…
... you use on this s-video mod?
Looks like one ... +2 machines already has this mod plus another in it. But ... -
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…
@rga24: Just one thing that crossed my mind... After doing the s-video mod, if we connect luma and chroma back again (for instance, joining the rca plugs with a proper adapter) will the end result be composite video? -
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…
... mind... After doing the s-video mod, if we connect luma and ... the end result be composite video?[/QUOTE]
Yes and ... -
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…
... when performing the s-video mod (or composite video mod)?
I noticed that ... requires 75ohm impedance on its video inputs but I have never ... ?
For the s-video mod I have only found 2 ... -
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…
... , and what signal levels the mod outputs are the relevant parts ... when I did my s-video mod on the +3, but I ... do is buy an s-video cable, they are not expensive ... -
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…
... ]Yes, I bought some s-video cables (actually extension cables with ... some cables for my s-video modded spectrums.
I ... try that if I s-video mod anything. Though I think you ... mean s-video plugs as s-vhs is ... -
Post Composite mod video not bright enough - FIXHiall, I have a few Spectrums and decided to modify them all with the composite video mod, i.e. redirect the feed to the modulator direct to the out…
... in image quality. Perhaps s-video mod is not affected in the ... way as is the composite video mod.:confused: -
Issue 1 oddityHello to everybody, I have a very first under my hands - a broken Issue 1. Apart from the classic "broken lower RAM" syndrome which will be easily t…
... , I decided to give this mod a try.
I ... case (previously did the s-video mod) I think I notice a ... better with RF or composite video? -
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…
... -48K-Excellent-Condition-with-Composite-Video-Mod-/131360609513?ssPageName=ADME%3AB%3AWNA ... -48K-Excellent-Condition-with-Composite-Video-Mod-/131360609513?ssPageName=ADME%3AB%3AWNA ... -
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…
... think to do and this video mod, i show difference on my ... -
ZX Spectrum+ adviceHey all, I just got a ZX Spectrum+ from eBay and I'm not sure yet what to do with it. I wanted to first take a peek inside, see what issue board it i…
... you must start with a mod, I recommend the easy RCA ... to Composite mod upgrade, like [url="http://womblesretrorepairshack ... /2008/11/zx-spectrum-composite-video-mod.html"]this one[/url]. If ...
