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128K heatsink no color in composite video and bad antenna outputI am currently repairing a ZX Spectrum 128K heatsink model. It gives no colors on composite video output, and very bad antenna output. I opened it a…
... likely since you already tried replacement video encoder TEA2000.
variable capacitor in the 17.7MHz oscillator ... -
Datel Turbo Ace - Manual ?I have acquired a [url="http://www.worldofspectrum.org/infoseekid.cgi?id=1000100"]Datel Turbo Ace[/url] Joystick interface, but have no detailed info…
... resistors, diodes, capacitors and a variable capacitor accessible from behind the box ... -
Speccy 128 QuestionMainly for the experienced speccy resurecters around these parts. Have you ever had a Speccy 128 with a borked TEA2000 video chip? The reason I ask…
... br />
There is a variable capacitor in the 128k spectrum which ... former owner has removed this capacitor because the composite (and so ... video is improoved if this capacitor is absent. If you like ... and instead connect it (the capacitor) to emitter of TR1 ( ... -
Trying to repair a 128K (heatsink)I've bought another ZX Spectrum 128K (heatsink model), but unfortunately the last owner did not tell me it did not work.... Because this Speccy also…
... is main purpose of C124 variable capacitor and could it be changed ... -
Hornby 00I never had a train set as a nipper but i had always lusted after one, so a few days ago i had a cheeky bid on one on ebay. Well it arrived today a…
[QUOTE=beanz;554216]No such thing! :lol:[/QUOTE]
/me drops a large variable capacitor with a geared reduction dial on beanz' head
:) -
Hornby 00I never had a train set as a nipper but i had always lusted after one, so a few days ago i had a cheeky bid on one on ebay. Well it arrived today a…
Sorry it's a bugbear of mine when people call large variable capacitor with a geared reduction dial ...'tuning caps'.
/cackle -
Hornby 00I never had a train set as a nipper but i had always lusted after one, so a few days ago i had a cheeky bid on one on ebay. Well it arrived today a…
[QUOTE=beanz;554220]Sorry it's a bugbear of mine when people call large variable capacitor with a geared reduction dial ...'tuning caps'.
/cackle[/QUOTE]
oaf :p -
Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... and 2 you have variable resistors and a variable capacitor to tune the ... colour circuits.
the variable capacitor is ... that well alone. The two variable resistors adjust the levels for ... -
Can someone help me...Hey all Well after my second complete cock up off ebay I'm feeling pretty deflated now regarding spectrums... First one I ordered was a +2A which h…
... had some preventative maintenance (membrane replacement, electrolytic capacitor replacement etc.) is going to ... -
Issue 1 oddityHello to everybody, I have a very first under my hands - a broken Issue 1. Apart from the classic "broken lower RAM" syndrome which will be easily t…
... regulator. Brand new Variable Resistors. Brand new LM1889N. Variable Capacitor borrowed from Issue ... -
Nasty vertical pattern on a 128K Toast Rack via RGBI managed to fix the busted membrane on my [url="https://www.worldofspectrum.org/forums/discussion/55755/got-myself-a-128k-toast-rack-plus-a-simple-a…
... /> Instead of using fix value capacitor go for any inductor from ... idea, if you have a variable capacitor on hand. -
128K refurb.... What is the best way?Here's the latest Spectrum I got... Finally got a Toastrack... Not sure if it was good value ( around US$100 ). [img]https://os.blackice.com.au/us…
... point, including conductive grime. The variable capacitor near the ULA looks pretty ... -
First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
... of the size as a replacement.
- 22uf 16V (C25, C28 ... -
Replacement Modulator for a issue 4 board Spectrum+???Anyone know where I may procure such a thing??? The one in my current machine starts up with the picture tearing and fading (As if the composite sig…
... it (I think its the variable inductor as when I press ... -
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…
Is 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 could get one that would handle it? It wouldn't need to be an original. -
Replacement chipsAfter much digging around on here, it seems to be the general consensus that the ULA could be causing the problems im having (spectrum is deaf to the…
Voltage regulator replacement?I have an 48K issue 3B that has (for unknown reasons) had one of the legs on the voltage regulator broken off. It looks like a simple replacement job…
... . It looks like a simple replacement job that someone ham-fisted ...replacement +3 psuok, who would be kind enough to help an idiot build a replacement PSU for the +3 / +2a , from a PC power supply? Guesser has already helped out a gr…
... help an idiot build a replacement PSU for the +3 / +2a ...Dead Spectrum diagnosis and desolderingI have two dead Spectrums - one I'm pretty sure is caused by bad memory, and the other - well, perhaps a bad ROM, perhaps a bad CPU (it gets halfway …
... in IC sockets in the replacement.
Any tips for ... have yet)? I have a variable temperature soldering iron, so I ...Best replacement for ZTX650?What is the best replacement transistor for the obsolete ZTX650? I've read that TIP31 will do the trick. Is there a decent equivalent from the BC or …
What is the best replacement transistor for the obsolete ZTX650?
I've read that TIP31 will do the trick.
Is there a decent equivalent from the BC or others transistors?Spectrum ULA replacement!Hi gang.. The Speccy 48 ULA Replacement is *almost* here ;) There has been lots of activity in building the CPLD board, sorting out some irritating…
... ..
The Speccy 48 ULA Replacement is *almost* here ;)
Anyway, the machine with ULA replacement doesn't quite boot up ...Replacement loudspeaker for rubber key 48kI'm fixing one of my rubber key 48k. Just ordered a membrane for it but I also need to find a replacement loudspeaker for it. The original some how q…
... also need to find a replacement loudspeaker for it.
The ...ULA Replacement WORKS !Hi chaps. Lots of activity over the last couple of weeks, and _finally_ we have [B]a working ULA replacement[/B] !! The analogue components such …
... have [B]a working ULA replacement[/B] !!
The analogue ...Socket to me..Specchums ! I'm laying out the PCB for the ULA replacement, and I need to know how common it is for the following IC's to be socketed (all to the ri…
... the PCB for the ULA replacement, and I need to know ... socketed or unsocketed.
Capacitor C28 next to the ULA ...Keyboard replacement for ZX-81Where can I obtain a keyboard replacement for the ZX-81. Can't find any on eBay. I wonder if there is a better keyboard available to replace the ZX-8…
Where can I obtain a keyboard replacement for the ZX-81. Can't find any on eBay. I wonder if there is a better keyboard available to replace the ZX-81's?
Paul+2 grey PSU capacitor changeHi I opened up a +2 grey power supply (2.1A max output) unit in order to replace the aged electrolytic capacitor inside, just like I always do with …
... to replace the aged electrolytic capacitor inside, just like I always ... is one big 6000uF 16V capacitor inside BUT i can't ... with a fresh 4700uF 25V capacitor?
Is there be any ...grrr The Capacitor PlagueI'm getting fed up of The Capacitor Plague. If you don't know what this is, I'll tell you the result. Your computer stops working. Sometimes, it won'…
... getting fed up of The Capacitor Plague. If you don't ...Hip ReplacementI've been offered a ceramic on ceramic hip replacement and told to "go away and google it and get a list a questions". For a chap in his 30's it seem…
I've been offered a ceramic on ceramic hip replacement and told to "go away and google it and get a list a questions". For a chap in his 30's it seems to be the best way to go. Has anyone got any suitable questions / advice that I can ask the consultant?Iphones - replacement back cases / shellsG'day y'all! Figured I'd help with a little 'warning' to a small community.....of which an even smaller portion of which will want to dismantle thei…
...
I purchased a replacement blue rear case / cover for ... for
...Buy a replacement shell that has ALL the ... SIM card sits in the replacement holder almost flush
