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Tuning issue 48KHi. I have just bought a 48K rubber key version and am having trouble tuning it in. I have tried two newish CRT televisions but get the same picture.…
... /> If it works with the composite mod (which is not a big ... ground, a capacitor as mentioned in the proper mod is a plus ... -
Tuning issue 48KHi. I have just bought a 48K rubber key version and am having trouble tuning it in. I have tried two newish CRT televisions but get the same picture.…
... /> If it works with the composite mod (which is not a big ... ground, a capacitor as mentioned in the proper mod is a plus ... and Composite onto the 'TV' connector: Insert a 10 pF capacitor in ... connector, then simply add the Composite signal over a 100 - 200 ... -
Picture interference on red areas.I recently got a 48K Speccy off eBay, did a composite mode and it seemed to work OK, but then my TV had to go off for repair so I didn't use it for a…
... around it. Also the electrolytic capacitor alongside the ULA. But no ... a 100μF 25V rated capacitor across C44 and it made ... ones I used for the composite mod.
I obviously still ... get composite dot crawl, and some very ... -
Second Hand SpectrumHi just joined the Forum. I have picked up a Spectrum at a s/h shop and would like some advice please. I have had two ZX81's packed away for severa…
... =mcnaugg;574626]Your composite mod sounds interesting, I ... composite-video-mod.html"]womblesretrorepairshack.blogspot.com/2008/11/zx-spectrum-composite-video-mod ... You can include a capacitor in series (around 100 ... the Spectrum to composite video input (or ... -
Spectrum +3, Issue 2...I have just had plonked on my desk a nice issue 2 Spectrum +3. I'm not sure if its 100% working yet, as I have not plumbed it into a telly. So, assu…
... you do a composite mod you remove the 33pF capacitor C24 which couples ... -
ZX Spectrum 128K composite video fixes in 1 documentI just finished my document with video fixes and improvements for all ZX Spectrum 128K models. Download it here: [URL="http://benophetinternet.nl/ho…
... -author on your docs (the composite mod as well as the Stereo ... mod). Since some years I published ... suggestion?
Include the composite video fix for the 48K ... -wire version and the inline-capacitor version), then WOS can host ... -
Issue 3B only sees 16k (and RAMTOP NO GOOD on loading)A ZX+ with issue 3B board that i got recently, does not see anything more than 32768 (sometimes 37267..) on "PRINT PEEK 23732 + PEEK 23733 * 256 (Ent…
... Side note, i did the composite mod on this spectrum, and the ... PCB. Some issues put that capacitor in the solder side rather ... the same isolation for the composite signal than previous issues with ... . I've made some composite mods on toastracks using this ... -
48k faultyHi guys! I have a 48k that, currently, presents 2 problems: 1 - Can?t sync to TV correctly. I get a lot of noise and the characters appear to be inc…
... adapter from RF to composite.[/QUOTE]
There' ... t know what the "composite mod" on a ZX Spectrum ... 2008/11/zx-spectrum-composite-video-mod.html[/URL]
... URL] of someone doing this mod.
Strictly ... Whether to include a capacitor or not (100~220 ... -
A quick ZX Spectrum + restorationI bought a ZX Spectrum + the other day it was untested and in a state didnt cost me much and i had it today only to find the real state. Key 3 was al…
... a composite mod. The fault was down to a dry up capacitor. I ... -
A quick ZX Spectrum + restorationI bought a ZX Spectrum + the other day it was untested and in a state didnt cost me much and i had it today only to find the real state. Key 3 was al…
... a composite mod. The fault was down to a dry up capacitor. I ... -
ZX Spectrum problem, intermittent picture lossHi I'm trying to resurrect An issue two board spectrum, I did the composite bypass and managed to get the picture constant and steady after playing a…
... another TV?
The composite mod, was this the "solder a ... was this a "solder a capacitor" mod?
Most ULA chips ... -
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…
... correct way to make the composite video mod to the spectrum circuit ... , I do know that the composite mod has a DC offset of ... devices will have a coupling capacitor that nullifies the offset.
composite signal, so there are two ... -
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…
... on the absence of a capacitor and/or 75 ohm ... crawl. No miracles here - composite is composite. The S-video version ... video originally had a wire composite mod connected to the extra socket ... I did the single transistor composite mod to the modulator socket, ... -
48K keyboard problemI have a strange issue with an issue 2 48k spectrum. Hopefully you guys can point me in the right direction in finding the fault. For some reason t…
... decided to tidy up my composite mod and remove the modulator board ... together and add the recommended capacitor it never had before. When ... -
3.4 Inch TFT with 48k Spectrum....hmmm?Hey guys, So I have been playing around with the idea of using a small LCD with composite input for a 48k Speccy. I got hold of one of these relat…
... /> How have you done the composite mod? Have you used a transistor ... transistor with a 100uF electrolytic capacitor.
The transistor ... is closer to 0V. The capacitor removes the DC portion of ... signal. Normally, only the capacitor should be enough. -
3.4 Inch TFT with 48k Spectrum....hmmm?Hey guys, So I have been playing around with the idea of using a small LCD with composite input for a 48k Speccy. I got hold of one of these relat…
... way, try this: use the composite mod that includes a transistor (a ... transistor with a 100uF electrolytic capacitor.
The transistor helps ... have done the comp mod using a 100uf capacitor bypassing the modulator ... -
ZX81 Composite Mod<p>I've done a simple composite mod to my Issue 3 ZX81 following a basic schematic I found on one of the ZX81 forums. Mod consists of a BC547, 1…
... used the ZX81CCP board to mod a couple of ZX81's ... the composite mod that I had seen elsewhere. I'll try the capacitor ... -
Best composite mod informationJust got my 16K (Issue 3) working. I'm in NTSC land so I need to run a composite signal through my PAL<->NTSC converter. I know there are a ton o…
I've made the composite mod without the capacitor. I get a really good ... -
No serial numberI recently bought a 1982 issue 2 spectrum which I believe is a 16k upgraded to 48k. There is no serial number on the case. Does anyone know why th…
... , also capacitor and resistor to the power circuit. And the composite mod and ... -
A focus on old TVs for 48k spectrums The old 48k Spectrum is becoming harder to use "display wise" in its original state. This thread is about retaining originality and not going down …
... remote control.
The composite mod where you just disconnect the ... 100uF 16V electrolytic capacitor between this and the composite video connection has ... -
Interference when using modern PSUMy 48k revision 3 spectrum with a basic 1 wire composite video mod works perfectly with the original power supply. However When I use a modern regula…
... advice. I have replaced the capacitor in the original power supply ... /> Recapped all the electrolytes
Composite MOD
Replaced an upper memory ... -
48k packed up after cap changeHi all, I'm relatively new to the Sinclair world, my 8-bit repairs in past was lurking in the dark sides of Acorn, Amstrad and Commodore! I've got…
... a new 7805, 100µF composite mod and did all the resistance ... you have got each electrolytic capacitor in the correct way round ... screen print error for one capacitor (can't remember which one ... -
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…
... troubles with this S-video mod unfortunately. I decided to connect ... but if I mod the speccy back to the composite mod then all ... from scratch and replace the capacitor with a new one but ... -
Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…
... assuming that carrying out the composite mod to the RF modulator won ... are going to do the composite mod on the 48K though, ... doing that (straight wire connection, capacitor etc). would be greatly appreciated ... 48K and I did the capacitor version. I did not follow ... -
Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…
... 48k has a simple wire composite mod without any caps or transistors ... want to perform the video mod "the more complex way:" http ... above I'll do the capacitor composite mod once I'm home from ... -
Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…
... that carrying out the composite mod to the RF modulator ... are going to do the composite mod on the 48K though, ... that (straight wire connection, capacitor etc). would be greatly appreciated ... or a 100uF 16V electrolytic capacitor (+ to the Spectrum circuitry, ... -
Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…
... 48k has a simple wire composite mod without any caps or transistors ... above I'll do the capacitor composite mod once I'm home from ... RGB Scart cables). So the composite mod is more a case of ... decent.
Hope the composite mod goes well, do please keep ... -
Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…
[quote="chrisgreen;952442"]Hope the composite mod goes well, do please keep ... (used 100uF 16V electrolytic radial capacitor) and the picture quality is ... -
Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…
... /> We also did the composite mod with the capacitor on the 48k+ - also ... membrane. What we hoped were capacitor problems appear to be something ... -
For Guesser :)"Bugger" thought DEATH as Guesser posted his pic of the composite mod he'd done. "Bit bloody good really, what am I gonna do now? I know, take the pi…
... posted his pic of the composite mod he'd done. "Bit bloody ... also cleverly etched a few composite video mod boards.
[url ... ]http://www.roygarland.co.uk/spectrum/composite ...
