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Search Again :: Adv Search 1000 results in 0.075s
<1234567…34>
  • Some kid pedalled past my window in C5 todayWhile teaching in an ICT room, a pupil 'drove' past piloting a bona fide Sinclair C5. I couldn't leave to go after him, and find out the reason or st…

    While teaching in an ICT room, a pupil ' ... piloting a bona fide Sinclair C5. I couldn't leave to ... out he'd brought it in for something to do with ...
    MattLamb MattLamb March 2014 Chit chat
  • 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…

    ... board that was originally in the case (it was ... where in the original upgrade instructions a 22 Ohm resistor ... issue 4a already has a resistor in place, so do I ... add or replace the resistor, but I'd appreciate ... using the STOP command in any programming I do, ...
    Simon_Carr Simon_Carr May 2013 Hardware
  • +2 blurry TV pictureHi, I'm a Spectrum user from Argentina, this is my first post :smile: I've recently got a spanish ZX Spectrum +2 (the grey one). Hooking european c…

    ... have composite video input and, in new sets, S-Video ... 2, adding a 15 ohm resistor in the pin 1 of the ... 2 with PAL games in that TV and it ... : the Spectrum is working in color in that TV, but the ... :-P

    Thanks in advance,

    Hern?n.
    Hernán Pablo Álvarez Hernán Pablo Álvarez February 2007 Hardware
  • Modding / repairing a +3I've got a +3 and I'm repairing and enhacing the computer. The enhacements I've done so far: - A slightly buggy video composite output. - Repairing …

    ... +3 sound bug (putting a resistor in TR5 emitter).
    - External 3 ... audio output repaired with the resistor (original spectrum specs) or would ... ?

    How about the IN #FF mod? Would you build ... mod (put a 470 ohm resistor between D7 of IC4 and ...
    Zup Zup March 2010 Hardware
  • 'Jumping' Composite Video Output on +2bNot having much luck recently... I have converted my +2b to composite out using the info contained [URL="http://www.secarica.ro/html/plus3_hardware.…

    ... that I left the 1k resistor in place between +12v and the ... a short while, without decreasing in intensity then speeds back up ...
    napoleonblownaparte napoleonblownaparte June 2012 Hardware
  • New colors / switchable color palette with regular ULA ?Hello. This may be an ignorant question but I just thought about it today and wanted to post it here to get some opinions. OK, so, today, while goin…

    ... Manual and found out that in the video section of Issue2 ... xxx,yyy could switch in an additional resistor in series to VR1 and ... of the machine, especially since in post-issue2 machines the adjustments ... in question are handled by ...
    memrah memrah November 2012 Hardware
  • ZX Spectrum +2 (grey case) voltage converter circuit oddity.I'm working on repairing one of these and have encountered a possible problem and I'm not sure what I can best do about it, if anything needs to be d…

    ... on for a while, resistor R79 becomes rather hot - ... interfaces) becomes very warm in the +2 under repair, ... but not in the other.

    in both Spectrums I found ... put a 10k ohm resistor in parallel with R55. This ...
    Zorn Zorn November 2014 Hardware
  • Replacement speakers for 16/48K SpectrumsThought I'd share a source of replacement speakers for the 16/48K machines: http://uk.rs-online.com/web/p/miniature-speakers/7903975/ (Equivalent…

    ... same diameter as the speakers in Issue 3 and above machines ... standard one. Here's one in situ:

    [img]https ... ]

    Note: The speakers in Issue 1/2 Spectrums are ... machines, add a 180 ohm resistor in series to avoid loading the ...
    balford balford September 2015 Hardware
  • Lambda 8300 Color module (ZX81)I was gifted such a device yesterday and have a few questions ... First of all it appears the interface does work in general when used with a 16K …

    ... appears the interface does work in general when used with a ... overwrite them all as recommended in the example program and set ... 've also removed the hardwired resistor in the footprint of the variable ... resistor and added a 1K trimmer ...
    Shockwav3 Shockwav3 February 2017 Hardware
  • +3 Distorted audio fix?I found a page on the Web a while ago which explained how to fix the "flaw" on the +3 circuit board which causes the sound from the AY chip to be hor…

    ... the BC239 and insert a resistor between it and ground? Or ... to add the resistor in the base (as shown in the +3B diagram ...
    trellis trellis September 2003 Sinclair Miscellaneous
  • +3 Distorted audio fix?I found a page on the Web a while ago which explained how to fix the "flaw" on the +3 circuit board which causes the sound from the AY chip to be hor…

    ... is non-distored sound. Also, in my experience with emulators, you ... leg and bung a variable resistor in and see what happens, then ... maybe substitute a fixed resistor when I've got the ...
    trellis trellis September 2003 Sinclair Miscellaneous
  • right: Advice neededI have found out I can load progs on the speccy from cd- GREAT! but now I need help on what to do. I buy the cheapest personal cd player I can find t…

    ... 'll need some sort of resistor in the lead from the CD ...
    mulder mulder September 2005 Sinclair Miscellaneous
  • Audio input on a +2would it be possible to connect an external tape recorder to the socket at the back,or would something bad happen?

    ... a capacitor, but usually a resistor, too :-) (There's some handy ... disc capacitor, and a 10k resistor). This would block any DC ... , it has a smaller value resistor in-line with the capacitor (680 ... a 100nF cap, 1K resistor and 680 ohm resistor.

    On ...
    Winston Winston March 2007 Hardware
  • The long view of TV out qualityAs time went on, Sinclair improved the analogue side to give better picture quality. It's therefore ironic that out of the four Spectrums I currentl…

    ... some TV's. Fitting a resistor in the RF path will help.
    DEATH DEATH April 2007 Hardware
  • can't find the new modulator design ?I remember seeing on someones site a new schematic for a modulaor that would fit in the modulator case of the old spectrum does anyone know the one …

    [QUOTE=nekdo123;189283]Anyone knows what difference does it make if I use 75 Ohm resistor or 82 Ohm?[/QUOTE]

    Is better to use 75 Ohm resistor (you can mount 2x 150 ohm resistor in parallel)
    but 82 Ohm also work well...
    Gods Gods May 2007 Hardware
  • can't find the new modulator design ?I remember seeing on someones site a new schematic for a modulaor that would fit in the modulator case of the old spectrum does anyone know the one …

    [QUOTE=Gods;189517]Is better to use 75 Ohm resistor (you can mount 2x 150 ohm resistor in parallel)
    but 82 Ohm also work well...[/QUOTE]

    In what way would it make it better? Thank you for answering.
    nekdo123 nekdo123 May 2007 Hardware
  • Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…

    ... when you want yours paged in (and instead, select your external ... issues. Stuffing a large value resistor in there will delay the signal ...
    Winston Winston June 2007 Hardware
  • Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …

    I cannot remember why I put the diode and resistor in, - sorry ! Now I think it makes an OR gate which was needed to get my +D working. try it with out you can always add it.
    Steve(spt) Steve(spt) July 2007 Hardware
  • Noob question. I'm stillconfused.I thought I had it all sorted out about the different models: +2....+2a....+3. But then, suddenly, I saw that there were a +2b. So, can anyone pleas…

    ... , but the +2B was made in another part of the world ... the modified sound circuit built in.

    So its like ... done this by using one resistor, in the right place.

    swift240 swift240 September 2007 Hardware
  • Noob question. I'm stillconfused.I thought I had it all sorted out about the different models: +2....+2a....+3. But then, suddenly, I saw that there were a +2b. So, can anyone pleas…

    ... , but the +2B was made in another part of the world ... the modified sound circuit built in.

    So its like ... done this by using one resistor, in the right place.

    DEATH DEATH September 2007 Hardware
  • Composite Video output problemHi everyone, I?ve got a problem that?s really bugging me. I have one Spectrum 48K and one Spectrum +3, both with Composite Video output modification…

    ... connect only one 10 Ohms resistor (in serie) between modulator video input ...
    Gods Gods December 2007 Hardware
  • Composite Video output problemHi everyone, I?ve got a problem that?s really bugging me. I have one Spectrum 48K and one Spectrum +3, both with Composite Video output modification…

    ... connect only one 10 Ohms resistor (in serie) between modulator video input ...
    Johan Johan December 2007 Hardware
  • DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…

    I don't believe in the "M1 fault". I also ... had to do with M1. In one case I had a ... the same circuit is used in the Divide+). I replaced the ... avoid glitches I placed a resistor in series to its input and ...
    ingo ingo February 2008 Hardware
  • 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…

    ... , you could try with a resistor in serial to get the total ...
    Pilsener Pilsener April 2008 Hardware
  • +3 sound cureHi all, As most of us know the Spectrum+3A has this sound problem, distortion. The +3B had this problem fixed. I done some looking at the circuitry l…

    ... combination of both - the 220R resistor on TR5's emitter (which ... characteristics), and putting a 220R resistor in parallel with R72. The 220 ... outputs (compared to the 75R resistor fix).
    Winston Winston June 2008 Hardware
  • +2 / 128k via RGB on VGA (TFT)On my (bad layouted - I know) homepage [url]http://www.truppel-online.de/[/url] you can see some photos of RGB picture on VGA - TFT screens. I used a…

    ... shows fast animations in real time without distortion in timing but has ... there is one 22 Ohm resistor in series then comes one 100 ... ohm resistor to ground parallel to 1 ... again comes one 22 Ohm resistor in series. This reduces output level ...
    ingo ingo October 2008 Hardware
  • Hello all, +3 questionHi, Been using this site for ages but I don't know why never joined the forum..? Anyway I have a +2 but just got a +3 it clearly has the sound issue,…

    ... />
    I've done the resistor on the transistor's leg ... .
    Should I do the resistor in parallel to R72 too or ... that instead of a 68R resistor (i can't find one ... ), a 220R should be used in paraller to R72. Which one ...
    gtsamour gtsamour December 2008 Hardware
  • Hello all, +3 questionHi, Been using this site for ages but I don't know why never joined the forum..? Anyway I have a +2 but just got a +3 it clearly has the sound issue,…

    ... combination of both - the 220R resistor on TR5's emitter (which ... characteristics), and putting a 220R resistor in parallel with R72. The 220 ... outputs (compared to the 75R resistor fix).[/QUOTE]

    Isn ...
    gtsamour gtsamour December 2008 Hardware
  • Timex 1000 PAL conversionHi, a friend of mine sent me a Timex 1000 from the US. I was prepared for the NTSC/PAL issues so no surprise came to me when i got a shadowy dark scr…

    ... />
    What would the additional resistor (68 ... 100 Ohm) between the ... ). Should i install the resistor before or after the 100uF ... video signal.

    The resistor in series to the output improoves ...

    The 1 kOhm resistor to 5V or GND could ...
    ingo ingo January 2009 Hardware
  • Ma20 Rgb InterfaceHello everyone , im a bit stumped on this one :) . Im wanting to convert the RGB lead to a scart connector. There was some info on the net regarding …

    ... ago. There's a duff resistor in it which I haven't ...
    Andrew Barker Andrew Barker January 2009 Hardware
<1234567…34>

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