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RGB cableI constructed an RGB cable to my +3 as per schematic on page 14 of this document here: [URL="http://mts.speccy.cz/doc/128_rgb.pdf"]http://mts.speccy.…
... though, if I could replace the 1k resistor in the +3 12V ... is the purpose of the resistor on the 12V line anyway ... -
48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…
... overheat... For me, "unsolder" and "replace" are always in the same ... pins, and eg. a series resistor can be taken out by ... -
Spectrum +3 FavourCan a kind soul with a multimeter and a +3 measure the resistance on the power socket between the 5V and the ground? I have a dead +3 that only has 0…
... ). A 100 ohm, 0.25W resistor will do the job. This ... not present at its output, replace IC2.
If voltage ... . If it's the case, replace T2, measure emitter voltage again ... -
Spectrum 128 toaster and divide incompatibility problems with some demos and games.Okay so I got this thing now. It?s my first Spectrum ever. [img]http://img836.imageshack.us/img836/2016/speccyl.jpg[/img] [url]http://img824.image…
... toaster:
* add a resistor to simulate the floating bus ... the MF128 will work)
* replace the 4 ROMs with 2 ... -
40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
...
rst16replacement ; the printroutine to replace RST 10/be used in ... a,(characterno) ; getscharater from charterno variable
sub 32
ld ... -
Need repair advice - noviceHello, does anyone know where I can get a professional to rejuvenate my 128 heatsink model? I know nothing of electronics and can't solder for toffee…
... these:
- Replace the ULA sound resistor with one of *higher ... -
Fuse problemTrying to build a Windows version of Fuse (latest SVN), but the resulting .exe doesn't seem to work quite right. Specifically, the sound is very chop…
... MSYS I set LDFLAGS variable to replace the missing ld.so.conf ... -
Fuse problemTrying to build a Windows version of Fuse (latest SVN), but the resulting .exe doesn't seem to work quite right. Specifically, the sound is very chop…
... MSYS I set LDFLAGS variable to replace the missing ld.so.conf ... -
12V -> 9VI found this simple dc-dc converter: [url]http://www.mcrent.com/workbench/dcdc1216/[/url] it converts 12V to 16V, can it be used to produce 9V by mod…
... /> You could replace the potentiometer with a fixed resistor once you have ... -
12V -> 9VI found this simple dc-dc converter: [url]http://www.mcrent.com/workbench/dcdc1216/[/url] it converts 12V to 16V, can it be used to produce 9V by mod…
... /> You could replace the potentiometer with a fixed resistor once you have ... -
More memoryHi all... can anyone help, Is it possible to get more memory for basic pref' in Basin.... 40 odd k is just not enough !
... , try using 1 character variable names and replace literal values with VAL ... -
Is the 128K heatsink's TV out modulator kit repairable?I have a 128K+ Spectrum that is working absolutely fine and is giving out the perfect picture from its RGB out socket (with the right cable ofcourse)…
... reason why someone should not replace the some of the components ... the circuit).
Also, replace the transistors with the same ... would test the resistors. A resistor drifting in value in a ... -
Is the 128K heatsink's TV out modulator kit repairable?I have a 128K+ Spectrum that is working absolutely fine and is giving out the perfect picture from its RGB out socket (with the right cable ofcourse)…
... probably a diode or a resistor.
I'll know ... />
@ingo
why not replace transistors inside the modulator box ... -
Ay Real Time Synthetizer SoftwareSpectlemen and Spectladies!It's been a long time that I'd like to ask this.... I ask thee to create a new musical software for our ZX Spectrum machi…
... fit in a +3, to replace the +3's sound circuit ... !!!!
Which is the 1 resistor fix? aaand... What kind of ... -
CAPS SHIFT on Spectrum+ ComputerI have just recently supplied a couple of replacement Spectrum+ keyboard membranes to a customer in Barby, Germany. Although something may have been…
Indeed there is a resistor that needs to be changed ... that if you didn't replace it though (but its not ... to come up. Replacing the resistor (or soldering one in parallel ... not work, connect a 22k resistor across R68 [url]http://www ... -
+2 Grey - low 128k sound volumeI'm trying to revive my old grey +2.... First problem was a faulty RF signal, so I bought a SCART cable from Retro Computer Shack on e-bay (it's the…
... wiper, which is where your variable resistance comes off. The two ... across where you want the resistor, then take the wiper to ... -
Speccy 48K grey screenGot a issue 2 48K speccy as part of a job lot on ebay, tested it and apart from a duff membrane it appears to be working. However the screen is a gre…
... are indeed variable resistors :p[/QUOTE]This type of adjustable resistor are ... -
Speccy 48K grey screenGot a issue 2 48K speccy as part of a job lot on ebay, tested it and apart from a duff membrane it appears to be working. However the screen is a gre…
... ;681196]This type of adjustable resistor are known as presets, as ... , rheostats, sliders, they are all variable resistors :p
The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... 0x0001 entirely, and don't replace it with another address. I ... could be some sort of resistor trickery here (as per the ...+3 Audio hates me with a passionHihi Since nobody seemed to have a spare +3B board, I've been trying to replace the audio entirely, aiming for a speaker inside the machine Since p…
... 47K base to collector resistor with the collector terminal ... , and a new 12K resistor to ground. The collector ... original 2.2K collector resistor and a new 330 ... ohm emitter resistor. These produce broadly the ... reused. I didn't replace any of the other ...Strange +3 HW IssueI a have a +3 with Issue 2 board system powers up ok and is useable as computer Drive works ok (tested on another machine) the drive however doesnt…
... that the nothing discrete (capacitor / resistor) is not at fault.
[/code]
[B]Check / replace these IC's[/B]
SAM Coupe - a video problemHi mates. Lately I managed to acquire a SAM Coupe 512K. There are, however, certain problems that - I thought - You might help me with, in a mome…
... is broken and if I replace them with those from 256K ... generated via a few crude resistor DACs from outputs from the ...SAM Coupe - a video problemHi mates. Lately I managed to acquire a SAM Coupe 512K. There are, however, certain problems that - I thought - You might help me with, in a mome…
... is broken and if I replace them with those from 256K ... you would still need to replace those DRAM that you had ... generated via a few crude resistor DACs from outputs from the ...Video output questions...Two questions... [QUOTE]1. The yellow and blue colours seem out of phase on the display. Is this normal for an RF connection to the TV/monitor?[/QUO…
... No because of the 1k resistor. The input on the ... You could calculate the resistor value and replace the 1k inside. ... then a 2.2k resistor in parallel with the ... 1k resistor should give you around ... the value of the resistor the voltage increases but ...Issue 3 board... How to resurrect?Dear Everyone, Now I have a working 48k Issue 3, a sort of working Speccy+ (still having problems with the keyboard, more of that in another post) a…
... is always good practise to replace all the electrolytic caps on ... . It is mainly capacitor and resistor values that need to be ...R68 resistorI've recently obtained a nice, fully functioning Issue 4a board, which I am putting into a Spectrum + case. I'm going to solder on the reset switch f…
... R68 should be a 10k resistor. It sounds like someone ... it for the 2.2k resistor in the past. The ... 2.2k resistor is supposed to be in ... resistor resulting in a resistance of 1.8k (you can just replace ... it with a 1.8k resistor of course)Trigonometric find angleHi guys, anyone knows a formula to calculate an angle between two coordinates, using basic?s function ATN , recent programming tools have ATAN2(dy,dx…
... of variable name are vectors)
EDIT: You can replace the ...Issue 4A repair attemptI think I need some help. I have a nice Issue 4A main board here, which does not give out any video signal. I checked some voltages (the ones that se…
... acts as a high value resistor rather than a proper ... can act more like a resistor?
What ... it, and you should replace that capacitor with one of ... a 16V rated capacitor to replace one rated at 10V. What ... do, ever, is to replace a 16V capacitor with a ...speccyboxSo after a long wait for the stuff I needed (at least most of it) I decided today to at least get through Stage 1 of my spectrum box. First off I wi…
... with a resistor (if they are not pwm controlled) or replace the ...
