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Another way to add audio input on a +2 - No more low level sound problem !Hi all, Last week, with 3 friends, we participated to a modelism / games / hobbies meeting, and we made a retro computing stand... (big succes, I'll…
... case. So the iPod audio signal is amplified by the original ... -
Two more faulty onesCould I get your opinion on these two faults, please? Understanding these two cases would be very beneficial for my ZX education. Thanks! - A Spectr…
... off, but somehow the video signal was gone all for a ... -
grey +2 mystery continuesAfter fixing two grey +2 Issue 3 Spectrums, where replacing and turning TR4 solved the RGB signal problems, I came across two more problems with the …
... turning TR4 solved the RGB signal problems, I came across two ... a good and stable video signal, but the sound is awful ... ?t seem to give a signal on the RF. RGB is ... -
Overclock the Z80 cpu to smooth out gameplay?Was thinking today of a Genesis/Megadrive mod I did a while back. It involved lifting the CLK leg on the motorola 68000 cpu (which in the MD, if I r…
... and attatching it's clock signal (10MHz) to where the 68000 ... -
Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…
... provoked by a spurious IO signal from the Z80.
3 ... -
128K RGB Display problem.I have just got my hand on a toast rack, but when powered and connected to the telly the picture jumps horizontally at random intervals. Could it be…
... keep a latch on the signal or is it something that ... -
harvard architecture spectrum clone.I got my first +2 before christmas. I'd never given the 128k spectrums much thought, always been a 48k rubber key tradionalist. :smile: I've been me…
... with a read and M1 signal plus other logic for some ... -
composite woessince I'm replacing a load of membranes , I decided to composite mod the machines also at the same time.. but am not having much joy with rubber key …
... far none are showing a signal on 3 tv's (2 ... -
Grey Spectrum 128+2 Is mine dead??Having a nice session of 128+2 playing this evening and as I was playing Paperboy I noticed a few graphical glitches that had not occured before, the…
... I can hear a loading signal but apart from a flashing ... -
Buzzing Grey +2This is mentioned in another thread but I thought I had best start a new one regarding this. Basically Ive done TR4, put a 5.5k resistor to R38 and …
... the audio from the video signal and replaced all the electrolytic ... -
+3 cant get any signalI recently had a ZX Spectrum +3 but the RF just wont work with either of my 2 CRT TV's. I bought a SCART and now i get a black picture which you can…
I recently had a ZX Spectrum +3 but the RF just wont work with either of my 2 CRT TV's.
I bought a SCART and now i get a black picture which you can make out the menu of the +3.
Is there anything I can do so that i can solve this ... -
ZX Spectrum + Please help!I wonder if anyone can help? I purchased a ZX Spectrum + from a Car Boot Sale last year, boxed, with games and leads. The problem is, it won't tune i…
... power and must be a signal, but the picture that I ... -
PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... been any reason to convert signal levels.
But the problems ... -
Timex Compute TC2048 loading problems solvedHi everybody, I've just finally fixed a TC2048 that had numerous problems. Once I'd changed all the RAM, the CPU and the ULA (surface mounted, for a…
... the power circuitry! The tape signal goes through an amplifier circuit ... at 2.0V when a signal was present. This meant that ... lowest output of the tape signal when amplified was 2.0V ... -
What have I done....:( (Switched internet provider)I decided that I was paying too much for my Virgin ADSL broadband. ?17 a month plus a line rental from BT (?15) was totting up to quite a bit for a s…
... / walls too thick for wifi signal/ too many devices' baloney that ... -
RTC module for DIVIDE[IMG]http://velesoft.speccy.cz/other/rtc_module_v01_full_top.jpg[/IMG] [IMG]http://velesoft.speccy.cz/other/rtc_module_v01_full_bottom.jpg[/IMG] [IMG…
... or 57d3. (DIVMMC not contain signal WR on sockets, then is ... -
My TV is dying....oh no's!So I'm thoroughly enjoying my return to Spectrum life at the moment. But something is becoming clear to me. Or to be more exact, clearly fuzzy to me.…
... UHF cable). Even the SCART signal appears less than 100% clear ... -
Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…
... -screen display, split the video signal between two TVs, then simply ... -
Which ULA to fit in which issue SpectrumI spent a little while studying the resistor changes on page 30 of the ZX Spectrum 48K service manual. They all concern aspects of the video circuit …
... resistor for the inverted Y signal coming from the ULA. 220R ... -
Modify a Sinclair FTV1?I got hold of a Sinclair FTV1 portable television. It seems to be working, but since there is no terrestrial signal any longer, there?s only snow sho…
... since there is no terrestrial signal any longer, there?s only ... Spectrum's RF or Composite signal? -
Weird output...Last week I found my old ZX Spectrum 48k and I tried to connect it to my tv... After tuning it (at 583MHz - C35, it's the only one with signal) it s…
... 's the only one with signal) it shows a weird image ... -
Spectrum +2 (Grey version) RGB SCART QuestionHi Guys, A quick question for you. As the new owner of a 128K Spectrum +2 (grey version), I'm using a cable from Retro Computer Shack which tries to…
... SCART spects suggests the blanking signal draws around 20mA max to ... -
+2 Grey Composite question.Hello all, Long time reader first time poster and all that...... Probably a daft question which has been asked hundreds of times, even though I ca…
... the capture card so ideally signal and ground is what I ... -
Currah uSpeech and Composite modOne more silly question from my side. Most of my Spectrums have a Composite mod. Is it possible to use a Currah uSpeech with such a modified Spectrum…
... the Currah mixes the RF signal with its speech and gives ... -
Timex contended memory timings, the TS2068 kludge board and EXROM at $4000 - $7FFFI haven't seen this documented anywhere yet so I thought I'd share my findings. I've been investigating contended memory timings on the Timex Sinclai…
... seems to be the tristate signal (TS#) which is used to ... the SCLD/VRAM buses. This signal should go low during memory ... the Bus Expansion unit (BE# signal on the edge connector) but ... -
HDMI generation by cloning video ram(coming from [url]http://www.worldofspectrum.org/forums/showthread.php?p=768257&posted=1#post768257[/url]). A thing I was brainstorming about.. Why …
... memory to build a HDMI signal, having the FPGA/microcontroller respond ... -
Issue 4S differencesI decided to buy an Issue 4S PCB after reading much about them on here. It was originally in a plus case which didn't come in the sale. I've been run…
... 2SC945 transistors as general NPN signal transistors instead of ZTX313. This ... -
Sinclair 128k available?Hello there, Spectrum fans! Let me introduce myself. I am from Russia, my name is Dimitri. In the 90-s I was working for a firm producing ZX Spectru…
... whatsoever, no RGB signal, just the pure sync signal coming from the ... -
Grey +2 - no sound during loadingI have a grey +2 here (issue 3), that is acting a bit strangely. I cleaned it and replaced/reversed TR4 to give it a stable RGB signal and so far all…
... give it a stable RGB signal and so far all works ... a few games from DivIDE. Signal and sound are great when ... -
48k temperamental loadingHi, Was using my 48k this evening using the Speccy tape app via my iPad as usual. First game loaded up ok, but then from there on in nothing at al…
... the iPad but the amplified signal did work this time. Loaded ...

