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Revisiting Spectrum CPU clock regenerationWarning: This post will be a bit nerdy :-) Some time ago, I experimented with phase locked loop circuits as a possible way to regenerate the Spectru…
... connected is an issue 4S 48K model, it's at the ... impedance controlled line on the PCB!)
So I think ... -
Tape loading for realHi, Having failed to load anything from my laptop or phone into my 48k, I have sourced a data recorder. An acorn ALF03. When I received the item I …
The Spectrum 48K and + models have either two ... the "loud speaker" (depends on PCB issue number).
Sinclair ... -
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…
... .
But, according to my PCB, right pin of R33 is ... wires coming from the ULAplus PCB are the ones needed for ... LSD demo), that works on 48K, but it seems to use ... -
The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…
... be connect to components on PCB only and logical clone with ... 128 timings. There are more 48K games and they have more ... -
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…
... :
[URL]http://zx-48k.npage.at/harlequin.html[/URL ... it be?
Because pcb Rev. A is in many ... -
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…
... :
[URL]http://zx-48k.npage.at/harlequin.html[/URL ... /> [QUOTE=-Micky;668125]
Because pcb Rev. A is in many ... -
PlusD mini - production startedI'm developing a PlusD clone, with some features stripped to make it very affordable. The real PlusD and German clone have an 7805 regulator, but I …
... /86826919@N08/8296144053/"]Plus D PCB pic 3[/URL] by [URL ... /86826919@N08/8297193534/"]Plus D PCB pic 4[/URL] by [URL ... /> This works fine with the 48k and Plus Spectrums that I ... -
PlusD mini - production startedI'm developing a PlusD clone, with some features stripped to make it very affordable. The real PlusD and German clone have an 7805 regulator, but I …
... /86826919@N08/8296144053/"]Plus D PCB pic 3[/URL] by [URL ... /86826919@N08/8297193534/"]Plus D PCB pic 4[/URL] by [URL ... /> This works fine with the 48k and Plus Spectrums that I ... -
SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... follow the tracks on the PCB and see if it connects ... lines (when used on a 48K Spectrum). Should these signals be ... -
PCB dimensionsDoes anybody have to hand the dimensions of the Spectrum PCB? I can easily find the size of the [i]case[/i] but not the size of the PCB, and it would…
... the dimensions of the Spectrum PCB? I can easily find the ... not the size of the PCB, and it would save me ... ?
I make the 48k board 8.5" x 4 ... -
I am not sure what to think about this!I was seaching for images of sides of a +2 and +3 and happened across this! The blogger has certainly done a very careful, proper job, and I think it…
... 128 which is just a 48k machine with more hardware bolted ... this mod without modifying the PCB as well.[/QUOTE]
Centre video signal from composite modded 48KHi! I made this simple video mod some years ago,to have a composite output instead of RF(on 48k). --from this site-- [url]http://user.tninet.se/~vj…
... good with cutting traces on pcb, it's a bit hard ... ).
Why you say downgrade? 48K's composite mod is simple ...Centre video signal from composite modded 48KHi! I made this simple video mod some years ago,to have a composite output instead of RF(on 48k). --from this site-- [url]http://user.tninet.se/~vj…
... good with cutting traces on pcb, it's a bit hard ... ).
Why you say downgrade? 48K's composite mod is simple ... similar to that on a 48K to replace the UHF output ... /> However if you have a 48K and do the mod for ...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…
... 's rather different to the 48K ROM).
ROM PC ...
[/code]
Under 48K emulation, returning to 0052 does ... (or VL1772) mounted on a PCB with some side selection logic ...Spectranet updateHi all It's been a busy summer, and in any case I've wanted a little bit of a break from doing Speccy stuff to avoid it getting old (pun intended). …
... model of Speccy. On the 48K, the /CLK signal is sort ... /> The buffered signal on a 48K has the rising edge slightly ... is on the peripheral's PCB and has a very short ... PCB trace (and on a 4 ... a big redesign of the PCB!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…
... and even a raw pcb design from the high ... capacitors. But in the pcb there are only three, ... angled connector.
This PCB is really apparently big, I ... If 48K works I should know plugging it to a pcb I ... trust the pictures of the pcb more than the schematic, ...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…
... into the main pcb.
- Main PCB with through connector ... the first
pcb. This PCB will have IDC 34 ... previous reply. The "lite pcb" will use these signals and ... lite version (on a 48k+) we will see which ..."Attribute embosing" on Pentagon 128I'm still in the progress of build my 2 Pentagon 128 machines and everything seems to be sorted out by now :) Except for 1 more or less minor issue. …
... seen this on my original 48k machine too. Not sure what ... an unintended bug on the PCB that was inherited when the ...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…
... only make "experiments" on my 48k+, I use an "interface wire ... /> Now that I have the pcb, the romV3 and the pals ... .
I will inspect the pcb closely and make an accurate ...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…
... only make "experiments" on my 48k+, I use an "interface wire ... ]Now that I have the pcb, the romV3 and the pals ... .
I will inspect the pcb closely and make an accurate ...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…
... , works just fine now (on 48k+). We have a good disciple ... schematic and make the first pcb.
I've found ...Spectrum 128K +2 problemhello, i am try to repair my spectrum 128k +2 grey, i remove all ram chips and i have some new ones spares, now i have remove all ram chips, i want …
... ;688219]The rom in a 48K machine will set the boarder ... good light, carefully inspect the PCB on both the bottom and ...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…
... programs in the 128K, the 48k+ I have loads almost anything ... again the pcb or try another source, but If the 48K loads ...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…
... what you get from a 48K Spectrum where the lower 16K ... levels. Thorough(!) inspection of the PCB should be the first thing ...SPECTRA - RGB SCART Interface for 48K SpectrumSince the launch of the SPECTRA interface back in June 2012, some discussion of it has appeared in the forums in the past (mainly [URL="http://www.wo…
... works great with both a 48k and 48k +. Really glad i stumbled ... the shelf that the the PCB would fit nicely into) with ...Opus discovery problemTook delivery of another of these today, bad drives but I got one working, a further issue developed after I plugged a Multiface into the Opus's expa…
... I try it with a 48k machine its black paper, white ... the quality of the Opus PCB is really low and it ...Which ULA?Just a quick question, more of interest rather than immediate need... I am thinking ahead about the repair of an Issue 2 board, and also an Issue 6A …
... component or track damage on PCB)?
Of all these ... , is this a 16K or 48K board?
Next steps ...ZX Spectrum 48K working as 16K from factoryGood morning I Have a Zx Spectrum 48k working as 16K , it came like this from factory. What can i do to solve this , and put it to work as 48K? Wha…
The fact it has a 48KB sticker suggests this was a working 48K machine when sold. Also it's an issue 4A pcb, pretty sure the 16KB option was long gone by then.Plus D Voltage Regulator OrientationHi, I?ve got a Plus D Disc Interface circuit board without case from a friend. Sadly he sends it to me without care for proper packaging. So it arr…
... Plus D on a Spectrum 48k + and a 128k +2 Black ... ]Also, the next pair of PCB pads between this 100uF 25V ... , this two holes on the PCB are empty. The ceramic "104 ... be ever soldered to my PCB here.
[QUOTE ...
