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Spectrum CapacitorsLooking for some opinions here, if I may? In the 80's and 90's I used to repair Spectrums and other machines for a living so I'm reasonably famili…
... who thinks that unnecessary replacement is to be avoided.[/ ... +), which should do fine as replacement for electrolytic capacitors.
... tend to shy away from capacitor replacement as well, if it ... Preferably by a ceramic capacitor of same value if available ... -
I recapped my 128K toastrack, installed stereo kit and detached audio from video, but...Hello fellow forumers! I'm seeking for help: I've finally decided to change all electrolytic capacitors of my 6U (with all Panasonics 105oC)... Af…
... ! ;) ) checked the polarity of each capacitor replaced? You can compare both ... is that one of the replacement capacitors was bad or overheated ... -
Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... the outer plastic of the capacitor is rotted away at the ... I will order in some replacement. Of course ,it might 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…
... output gotten via a large capacitor (220uF) by means of a ... ' created with a 220 Ohm variable resistor. I got the strong ... -
Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... that goes from the big capacitor to the 9 v contact ... and I think as a replacement for this original supply . This ... -
Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... . That's why the nearby capacitor is rated at 400V.
replacement will fit on the PCB ... -
Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... Plastic Case : these are of variable quality and care is needed ... supply cases . I used a capacitor discharge tool to make the ... -
Leading Zeroes on a Score in BASICI'm trying to print the score with leading zeroes such that it's always 6 characters wide, i.e.: 000010, 000150, 006100 etc. I quickly knocked thi…
... as being fractionally quicker, each replacement of "AT rr,cc" with ... ; cc are literal numbers, not variable names), which might be a ... -
Optimized (in size) Z80 simulatorI am evaluating Z80 simulators to try to create a tool to analyse z80 programs. I'd like to start with a simple register coverage tool and t-state cy…
... the same thing. After your "replacement" the values of A, D ... length of each instruction becomes variable)
5) JP (IX ... -
Optimized (in size) Z80 simulatorI am evaluating Z80 simulators to try to create a tool to analyse z80 programs. I'd like to start with a simple register coverage tool and t-state cy…
... the same thing. After your "replacement" the values of A, D ... length of each instruction becomes variable)
5) JP (IX) f ... -
Help understanding the Z80.So I have a Z80 CPU and a 32k ram chip. I understand how they connect. (Data and address busses, chip select etc.) But how would i input information…
... of memory and can be variable in size depending on whoever ... this is not a ram replacement. Also write cycles will be ... cycles. Again, not a ram replacement. To start a write cycle ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... about the small size of replacement capacitors is that the identification ... write on each bag the capacitor type inside it . I had ... -
ZX Spectrum Next Kickstarter Launchedhttps://www.kickstarter.com/projects/1835143999/zx-spectrum-next
... surprise here! You need a variable for line counter. You need ... 't change a meaning of "replacement" into "extension" -
ZX Spectrum Next Kickstarter Launchedhttps://www.kickstarter.com/projects/1835143999/zx-spectrum-next
... they'd be implementing a replacement ula with ula+ in that ... surprise here! You need a variable for line counter. You need ... to do any ROP function, variable size, and on and on ... 't change a meaning of "replacement" into "extension"
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Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... /> There is also an axial capacitor at the back that I ... , I can prepare for replacement of this capacitor on Opus No 4 ...Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
Back to capacitor replacement.
Maybe last time ... , smaller diameter , capacitor as a new replacement? A radial capacitor of the same ...ZX Spectrum 48K it only shows colored barsHello, I'm new to the forum and I need help with a ZX Spectrum 48K which I bought recently unfortunately defective. I want to mention that before t…
The physical shape of the capacitor does not affect the electrical ... -in-stock&st=Axial+capacitor"]This is the list[/url ... /> In terms of voltage, any capacitor rated at 25V, 50V or ... forgot to mention, regarding the replacement TRs .. in TR4 (ZTX650), can ...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…
... />
I do have a replacement ROM from Retroleum, which is ... you have got each electrolytic capacitor in the correct way round ... screen print error for one capacitor (can't remember which one ...Recapping parts list needed for +2a power supplyHello I've recently acquired a +2a power supply. It works, but given the age I'd like to do some preventative maintenance and refurbish it. Does a…
... general, for most use cases, replacement on failure is not a ... are symptoms of a electrolytic capacitor loosing capacity, or it’s ... see or detect symptoms of capacitor failure.
However, ... examine each and every electrolytic capacitor. If I am not ...Finding a good (UK) external switch mode power supply for the basic 48k and 128k ZX SpectrumsThis idea has probably "done the rounds" by now . I think I have heard about it a bit late . This thread with look at replacing the original "heavy l…
... recommend that the electrolytic smoothing capacitor(s) be renewed. In ... units, a replacement 4700uF 25V 125°C capacitor will cost less ... But if the electrolytic smoothing capacitor(s) dries out, an ... br />
The new / replacement SMPSUs are not immune from ...Finding a good (UK) external switch mode power supply for the basic 48k and 128k ZX SpectrumsThis idea has probably "done the rounds" by now . I think I have heard about it a bit late . This thread with look at replacing the original "heavy l…
... with the three terminal 7805 replacement DC/DC converter regulator talked ... failure or when symptoms of capacitor aging appear.
Some ... />
Also if an electrolytic capacitor runs warm or hot, or ...Pseudoanalogue joysticks for the ZX SpectrumI think that when I got my first joystick back in 1985, this particular type was no longer around or it was extremely difficult to find (if commercia…
... a capacitor. The system discharges the capacitor, starts counting time, the capacitor then ... pots (variable resistors) in the joystick. Then when the capacitor voltage goes ..."Self Isolation" and Speccy PCB repair"These Days" of "home self-isolation" , particularly on rainy days , I reckon I will have more time to hone my Speccy PCB repair skills which are s…
... decided to do it one capacitor at a time , just like ... right side at capacitor 34 . I tested my replacement and it was ... I redid it with another capacitor - the Samsung version had spare ...Repairs and Reparing.Hi All, Just finished resurrecting an Issue 3A board. Had black lines, so replaced the lower 16K RAM chips, Amazed they just cost a couple of doll…
... computers produced prior to the capacitor plague). These machines only need ... ULA are long obsolete. But replacement modules are available in very ...Spectrum stuff online "buying skills". Are real skills needed for low cost Speccy items? Firstly , there are some pretty fundamental requirements that are probably too basic to mention , like buying the right software at the right pri…
... a lot bigger than just replacement of capacitors! . So I will ... did this with a recent capacitor order . The effect was to ...Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... " at the same time for capacitor replacement
The other thing ...Using a thermal camera to fix speccy's.Hi All, Thought I'd share another repair... Got a board that collapsed the bench supply straight away ( I run a bench supply and give it just enou…
... really difficult to manually measure capacitor temperature alongside ambient, as sometimes ... image.
The whole capacitor replacement concept is actually quite contentious ...Taper / WinXP /SB ProbsDoes anyone know how I can get Taper to recognise my SB Live soundcard under Windows XP. The readme.txt mentions the BLASTER environment variable bu…
Does anyone know how I can get Taper to recognise my SB Live soundcard under Windows XP. The readme.txt mentions the BLASTER environment variable but mine is missing?Hook CodesIf you've dug into the Interface 1 this should be an easy question. I last had 'em circa 1990 while I can remember the things they did Start Motor C…
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DB 01 ;;produces "2 Variable not found"
RST 08 ...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…
... need a difficult to get capacitor to fix something. It is ...
