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  • 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…

    ... you have to separate (cut) TR1 from TR2 but paying attention ... to break the connection between TR1 and R51, yet breaking connection ...
    Renegade Renegade August 2018 Hardware
  • 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…

    ... better off using the existing TR1 and TR2 for the luminance ...
    1024MAK 1024MAK August 2018 Hardware
  • 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…

    ... better off using the existing TR1 and TR2 for the luminance ...
    Renegade Renegade August 2018 Hardware
  • 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…

    ... be added to TR2 (because TR1 and TR2 are taking care ...
    Renegade Renegade August 2018 Hardware
  • 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…

    ... better off using the existing TR1 and TR2 for the luminance ...
    1024MAK 1024MAK August 2018 Hardware
  • 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…

    ... be added to TR2 (because TR1 and TR2 are taking care ...
    repetto74 repetto74 August 2018 Hardware
  • 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…

    ... then all is fine ! So TR1 and TR2 have not been ...
    repetto74 repetto74 September 2018 Hardware
  • Spectrum 48K / composite mod / LCD TV: voltages out of the ULAHello Spectrum World I have juste bought again my first computer on ebay... a Speccy 48k issue 2 with a 5C112E-2 ULA. Just had to replace TR4 and …

    ... V between the ULA and TR1/TR2/LM1889:[/b] it would ...
    paf paf November 2018 Hardware
  • Issue One (2020)My version of the Issue One PCB under development: [img]http://fotogalleria.info/pub/ZXSpeccy/IssueOne/ZXi1_PCB_01.jpg[/img] [img]http://fotoga…

    ... they are as follows:
    TR1 - BC550 instead of fast and ... noisy ZTX313
    TR2 - as TR1
    TR3 - ZTX313 (well MPS2369 ...
    Claudius Claudius May 2020 Hardware
  • Spectrum +2 grey to VGA and GBS-8200Hi friends, need your help with a cable i am trying to make it work, using this link https://cygnus.speccy.cz/popis_propojeni_zxs128kplus2_a_g…

    ... \same pin with emitter of TR1. (different with your instructions but ...
    xaris_sm xaris_sm April 2021 Hardware
  • Two new spectrums arrived. One no video.Got a +2 and a Toastrack arrived today. Toastrack was actually in good condition, little wear, though a little dirty. Worked well on first power up, …

    2A ! Who knew the ZTX650 will handle 2 AMPS!... ( It' ...
    cj7hawk cj7hawk September 2021 Hardware
  • 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…

    ... be replaced with alternatives ie TR1 & TR2 can be fitted ...
    mark8bit mark8bit October 2021 Hardware
  • 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…

    ... this as standard.

    TR1 and TR2 can indeed be ...
    1024MAK 1024MAK October 2021 Hardware
  • 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…

    ... higher voltage version of the ZTX650. The ZTX653 is an even ...
    1024MAK 1024MAK October 2021 Hardware
<1…891011121314>

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  • Fixed Speccy Software. And which games remained unfixed?
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