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+3 - beeper sounds but no AY musicHi guys I am repairing a plus 3 revision 2 board that had no sound at all. Using schematics from https://zxnet.co.uk/spectrum/schematics/ I manage…
... .
I have a replacement MC1376 but it'll be ... the RF output for the video, you could use those as ... -
Rod-land - struggling to get working on my real +2 (grey machine)Hi Everyone, I've had a week enjoying tinkering with my +2 and there are only a few games I have not managed to play on my +2 that I enjoyed back …
... should take note of every capacitor on the machine so that ... while in the colored bars video pattern shown by pressing BREAK ... -
Composite out, but without a mod?Through [url="https://faqwiki.zxnet.co.uk/wiki/ZX_Spectrum_16K/48K_edge_connector#Video_Outputs"]this[/url] page, it sounds like I can keep my ZX Spe…
... , but pick-up the composite video out signal from the expansion ... Spectrum’s non-standard composite video signal. Sometimes it’s possible ... by installing a capacitor in series with the composite video signal, but ... -
Composite out, but without a mod?Through [url="https://faqwiki.zxnet.co.uk/wiki/ZX_Spectrum_16K/48K_edge_connector#Video_Outputs"]this[/url] page, it sounds like I can keep my ZX Spe…
... there will be no video signals on the expansion edge ... />
The monochrome (/Y) video signal on the edge-connector ... match the impedance to consumer video equipment.
The ... video signal is already buffered, so may just need a 100uF capacitor ... -
Composite out, but without a mod?Through [url="https://faqwiki.zxnet.co.uk/wiki/ZX_Spectrum_16K/48K_edge_connector#Video_Outputs"]this[/url] page, it sounds like I can keep my ZX Spe…
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[quote]The monochrome (/Y) video signal on the edge-connector ... the impedance to consumer video equipment.[/quote]And by ... video signal is already buffered, so may just need a 100uF capacitor ... a specific ground for the video signal?)? And 100uF? That ... -
Composite out, but without a mod?Through [url="https://faqwiki.zxnet.co.uk/wiki/ZX_Spectrum_16K/48K_edge_connector#Video_Outputs"]this[/url] page, it sounds like I can keep my ZX Spe…
... video equipment, as they already have a built in coupling capacitor ... video equipment does not have a built in coupling capacitor, ... then the composite video output from the ... a 100uF 16V electrolytic capacitor (positive lead goes to ... -
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 ... -
Recreated Spectrum .What do we get for the "now" (Aug 2017) best retail price of around £35?Well best/ cheapest retail prices can vary a bit so I thought it best to be specific. At this £35 price ,is it a good deal and what do we get ? A…
... soldering up my new audio/video output for the PI Fuse ... too much to get a replacement! -
Need some help building a cable for Spectrum 128k +2 to US Commodore 1084S-PHello WoS users! Does anyone have a diagram detailing how to build a cable to go from the Spectrum 128k +2 (grey) to a Commodore 1084S-P (US version…
... and bridging another ceramic disc capacitor over to the leg of ... remove the audio from the video circuit. I didn't see ... -
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…
... my Plus and modded the video output, which is all working ... -bits suffer from the same capacitor problems as the speccy? Although ... -
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 ... -
The Different Approaches To Upgrading the ZX Spectrum from 16K to 48K This is probably something that has been covered before . I will take a look to see if I can find anything on WOS
... covers lower RAM replacement in this You Tube Video (towards the end ... -
Modifying a speccy to +5v only operation.Just a thought experiment so far. Let's say i wanted to make a more resilient spectrum by getting rid of the DC-DC converter circuit. This would remo…
... ;57288"]But what about the video circuitry (LM1889) and the edge ... Traco 5v 7805 switch mode replacement, i guess i could fit ... -
48K ZX Spectrum 48K Recap (Capacitors) Or Not?I have seen arguments "for an against" on this subject by some "high calibre" experts . So if the experts can differ on this question then my questi…
... symptoms of a possible electrolytic capacitor failure, I’m not saying ... may see a less noisy video picture. But some ZX Spectrum ... have some noise on the video picture even after all the ... -
Spectrum Next shipping this weekJust wondering if anyone else here got the mail about the Spectrum Next shipping this week and is anyone excited about it? It's been so long that th…
... =https://youtu.be/LAkz1f2sMDU]this video[/url]:
https://www ... layer, gold plated OFC flux capacitor, please contact me, lead sales ... -
"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 ... -
48k Spec with composite video mod, screen adjustment possible?I've had a 48k Speccy with a composite video mod for a few years now, and although it works perfectly otherwise, the screen isn't centered correctly …
... />
Which version of composite video mod. has been done?
[*]The electrolytic capacitor version,
[*]The transistor version ... -
48k Spec with composite video mod, screen adjustment possible?I've had a 48k Speccy with a composite video mod for a few years now, and although it works perfectly otherwise, the screen isn't centered correctly …
... video input) , but I've always done well with the 100uF capacitor ... -
48k Spec with composite video mod, screen adjustment possible?I've had a 48k Speccy with a composite video mod for a few years now, and although it works perfectly otherwise, the screen isn't centered correctly …
... /> Assuming there is no extra capacitor or transistor on the outside ... only” version of the composite video modification. Some TVs don’t ... -
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…
Questions you were afraid to ask.....This thread is devoted to those questions you never asked, or were afraid to ask but want answers to. Such as: [LIST] [*]Why can't you put metal in…
In the video for Major Tom by Peter ... had to get a quick replacement, or maybe it wasn’t ...Questions you were afraid to ask.....This thread is devoted to those questions you never asked, or were afraid to ask but want answers to. Such as: [LIST] [*]Why can't you put metal in…
[quote="dm_boozefreek;977973"]In the video for Major Tom by Peter ... had to get a quick replacement, or maybe it wasn’t ... />
Having looked up the video I see what you mean ...Were the full Sinclair Loki specs ever actually known?I was just curious. A lot was leaked to the media, but the exact specs seem different depending on source. Some say it could support up to 512x256 an…
... by the generation of the video picture and the Z80 accessing ... also the reason why the video timing is the way it ... to include a resistor and capacitor in the serial RS232 connector ... its development. And the QL video system is nowhere near as ...More "What could have been"... The Z280.So in chasing up the Loki specs, I happened upon some parallel developments... And had Sinclair gotten to make the Loki, there could have been some i…
... questions such as how the video might have been assembled, as ... looks like ( from some early video ) Sir Clive was thinking about ... multiprocessor add on or a replacement later. I'm even envisioning ... are considered, The way the video system might have works makes ...16pf Capcitors for C72/C73 issue 3b. Can I use 18pf?Looking at the service manual it states to use a 16pf ceramic disc capacitor in positions C72 and C73 on issue 3b boards. Is this very critical in bo…
... either a lower ram module replacement or some 4164 ram with ... only .. and with an S video mod .. i also wanted to ...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 ...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…
... .jpg[/img]
That "orange" capacitor behid that hot resistor is ... /> The two caps near the video modulator... ( One visible in image ... change unless there's video issues. The video is very clean on ...Introduce yourself[SIZE=3][FONT=Comic Sans MS]This is the thread to stop by & introduce yourself.[/FONT][/SIZE]
... talk about all types of video games classic, modern, whatever. I ... to build one of those replacement PCBs from scratch some day ...I just bought a second hand BBC MasterI have had the notion for a while to get myself a old Beeb - maybe a scrappy one and fix it up - recap its PSU or whatever. Well I gave in yesterday …
... about 4.00 in the video.
https://www.youtube ... to be complete? Is the capacitor still working in some limited ... -a-macintosh-computer/original-rifa-capacitor-not-yet-blown-front_1x.jpgI just bought a second hand BBC MasterI have had the notion for a while to get myself a old Beeb - maybe a scrappy one and fix it up - recap its PSU or whatever. Well I gave in yesterday …
... that the voltage of a capacitor has nothing to do with ... the size of that capacitor. Smaller ones can sometimes be ... .
Here is a video for more info. It is ...
