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Auto-fire circuit based on IC 555Greetings! Spanish magazine Microhobby once wrote an article explaining how the auto-fire circuit worked on a joystick and the interface requireme…
... described there :-/
The ceramic capacitors reading 100k and 10Kp ... -
Issue with TV signal + Inductor Coil (16K Issue 2 Speccy)Hello guys, I just got a 16K Issue 2 Speccy from eBay. It was sold as not working so I knew there would be some work needed before it's working ag…
... did the composite mod with capacitor) and it seemed like it ... -
No Keyboard after recap - ZX Spectrum 48kGuys I am desperate. I did a recap of the ZX 48k board and now the keyboard is not responding to any keypress :-(. I paid attention to the capacitors…
... course and used sometimes a capacitor with higher voltage than the ... -
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…
... . I've tried adding a capacitor to the video out circuit ... -
Microdrives and standard service modifications[url="http://www.worldofspectrum.org/pub/sinclair/technical-docs/ZXMicrodriveInterface1AndInterface2_ServiceManual.pdf"]worldofspectrum.org/pub/sincl…
... has had the... "A 22uF capacitor C7 has been added across ... -
Oric Atmos HelpMaybe a bit of a long shot but there are enough skilled people here, so hopefully I can get some thoughts please. OK I have an Oric Atmos here, it…
... moment (sorry!) , from memory a capacitor and transistor are 'tacked on ... -
Spectrum 48K / composite mod / LCD TV: voltages out of the ULAHello Spectrum World I have juste bought again my first computer on ebay... a Speccy 48k issue 2 with a 5C112E-2 ULA. Just had to replace TR4 and …
... the composite modification (with the capacitor and then with a NPN ... -
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…
... doing that (straight wire connection, capacitor etc). would be greatly appreciated ... -
Spectrum 48k Plus - Scrolling horizontal linesI performed a standard composite mod on my Spectrum Plus. I followed the instructions to the letter and it went fine and the picture displays on both…
... need to add a resistor / capacitor to my mod? Any help ... -
Have you got a project or are doing anything interesting during lock down?I’m “having” “fun” cutting shapes in wall tiles to fit around the electrical switches, sockets and heating/boiler control box in the utility room. …
... the correct shaped holes in ceramic wall tiles is not that ... -
48k issue 4B display problem etchi,, i have a zx spectrum 48k issue 4B with a display issue it has wavy lines in both the border and paper,some colours seem worse than others ie red…
... or thought previously had a capacitor composite mod with the same ... -
Screen corruption with devices on edge connector (grey +2)Hi, I've recently done a full capacitor replacement and replaced all 16x DRAM chips on my grey +2. Prior to this I would get a corrupted screen…
... 've recently done a full capacitor replacement and replaced all 16x ... -
zx spectrum 48k interference during first two minutes of warm upi have a issue 3B 48k that i am looking at during the first two minutes (approx.) of warm up there is interference on the screen (tried to take a pic…
... composite mod (via 100 uf capacitor) as the RF didn't ... -
ZX Spectrum +2B 128K sound distorted and vertical jailbars. How to fix it?Hello, I have a ZX Spectrum +2B 128K (Issue 4 Motherboard) which suffers from sound distortion (the AY music is loud and distorted) and also very fa…
... so I don't have capacitor C37 and I already have ... -
Spectrum Abuse...Just got some new Spectrums in to repair ( I find it a great way to relieve stress, excepting when I do something daft while fixing them... ) One …
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So I desoldered the capacitor to have a look, and ... -
+2A PSU - power transistor substitute?I used a +2A PSU on a newly acquired Speccy for the first time in quite a while earlier, it was causing apparent issues in that starting the tape dec…
... fine) and possibly a dry capacitor somewhere, so I made a ... -
The Spectrum In EuropeWhat are the differences between Speccys in Europe and the UK? ie would a British 48K work in France or Italy, and vice versa?
On a +2a ceramic resonator x200 can be changed to either 5.5Mhz or 6Mhz. I'm not sure about other spectrums.
Fraser. -
wantedI need a booting floppy disk made by W95B or later. I need it to boot before running powerquest drive image to have access to fat32 disks. If someo…
I have the capacitor now. I have a dead tea2000 ic. Anybody want to sell one for a nominal fee? They are on all spectrums. -
Replacement power suppliesIs it possible to get a replacement power supply for the old speccys? The high Amperage is a problem: 1.4A for the rubber-keyed 48K. Know where you c…
... large (not that large) electrolitic capacitor and 4 diodes mounted in ... (well, you _could_ remove the capacitor). So, almost anything that produces ... -
What is your worst Speccy related memory?We've had the good times, but there were bad times too. I will give you two choice cuts from my back catalogue... Over at a friends house, wanting to…
... know you must replace a capacitor/condensator. -
ZX Spectrum+ questionI just bought a Speccy+ yesterday (48K) and was wondering about a few things. Is it supposed to have a reset button like the 128K? There is a hole in…
... solder them directly onto a capacitor in the middle of the ... -
Install a Sintech Video adaptor in a Spectrum+Hi all, I'm an old Commodore user (boo! hiss!) that's aquired his first Spectrum. Since my modern TV doesn't like the RF output of any old computer …
... [/url] . A single transistor, a capacitor and a resistor, and you ... -
Amigo appreciation thread!Come back Amigo! There isn't half as much to read now that you've stopped posting!
... ? Marty, power up the flux capacitor, we're getting out of ... -
Broken ZX Spectrum + (48k)Hi! I just got a ZX Spectrum + from a friend. He said it was working around 8 years ago when he put it into the cellar. It was in great condition - …
Any ULA from a Rubber keyed 48k will work.
Not sure about a 16k.
If you have another 48k try swapping them out.
You might also want to get a capacitor kit and check the voltages beforehand.
t -
Sound on Spectrum +2/a & 3Okay, so now I've got 2 +2's and a +3 and they all have absolutely the crappiest no existant, buzzy, sound on the planet. Surely they all cant be fau…
Britain uses PAL I with a different audio carrier to PAL G used in some european countries. The +2A has a 6MHz ceramic resonator that can be changed easily. -
Sound on Spectrum +2/a & 3Okay, so now I've got 2 +2's and a +3 and they all have absolutely the crappiest no existant, buzzy, sound on the planet. Surely they all cant be fau…
Yeah, a mono plug would destroy the capacitor C24. I had to fix a +2A after getting this problem. -
Is Spectaculator Worth Registering?I normally use RealSpectrum and was thing of trying another emulator. What are the pro and ons of Spectacultor? Does it support disk image files?
... the Spectaculator to run a ceramic glaze calcuation software programmed in ... -
Sound distortion on +2/+3Hi all, this is my first ever posting, so please be gentle! I have two +2s and a +3(all second-hand but in vgc) and the AY output on all three is ver…
... carrier is wrong. Only 1 ceramic resonator would need to be ... -
Sound distortion on +2/+3Hi all, this is my first ever posting, so please be gentle! I have two +2s and a +3(all second-hand but in vgc) and the AY output on all three is ver…
You don't need a DeLorean a C5 will do.Maybe Uncle Clive built a C5 that was also a time machine. Once it hit 8mph POW! The evidence: [url="http://r-e.co.il/article/0407071614/"]http://r…
... whether or not a flux-capacitor had been fitted.. mmmm
