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Search Again :: Adv Search 1000 results in 0.003s
<1…20212223242526…34>
  • 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.…

    ... couple of diodes and a resistor. Should probably even fit inside ...
    guesser guesser August 2011 Hardware
  • 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.…

    A 680 ohm resistor between 12v and pin 16 ought to do you... I worry about pulling 16mA for switching the TV input but that seems to be the wisdom on the net :smile:
    guesser guesser August 2011 Hardware
  • Spectrum 128k+ Toastrack lower Beeper level?Does anyone know the easiest way of matching the AY and beeper levels? I'm guessing perhaps the easiest thing to do is lower the beeper line rather t…

    ... /ear) take, but they referenced resistor and capacitor numbers not listed ...
    RobeeeJay RobeeeJay August 2011 Hardware
  • Spectrum 128k+ Toastrack lower Beeper level?Does anyone know the easiest way of matching the AY and beeper levels? I'm guessing perhaps the easiest thing to do is lower the beeper line rather t…

    ... number without removing it) 10K resistor and capacitor to pin 34 ... you can either increase the resistor by the ULA to a ...
    RobeeeJay RobeeeJay August 2011 Hardware
  • 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.…

    ... 12V has a 1K inline resistor and the value of R ...
    orange orange August 2011 Hardware
  • Calling all owners of Black +2s...Another annoying hardware survey for you... If you have a Black +2 with a motherboard marked: [B]Z70833 ISSUE 1 [/B] [LIST] [*]does your board have…

    ... . R45 does indeed have a resistor placed. Checking another Issue 1 ...
    Macc Macc August 2011 Hardware
  • Spectrum 128 sound, but no musichi everyone my 128k speccy sounds only as a 48 k ,the music is not working anymore, any ideas?

    Thanks, works like a charm right now
    I guess i missed the right socket, or it had something to do with that old composite mod, with resistor removed to avoid sound interference in graphics:-?
    danilop2k2 danilop2k2 September 2011 Hardware
  • Problems with a gray ZX Spectrum +2Hello. First of all, thank you for receiving me on this forum. I'll try to help everybody as well as I can Said that, I want to do two questions abo…

    ... my tipple of choice), a resistor 1kohm, a transistor (bc327),74HC ...
    Zetr0 Zetr0 September 2011 Hardware
  • Is this pure bulls@*t or what?Read [URL="http://www.ebay.co.uk/itm/SINCLAIR-ZX-SPECTRUM-PLUS-48K-REFURB-COMPOSITE-OUT-/170691876340?pt=UK_VintageComputing_RL&hash=item27be0755f4#h…

    ... has to be derived by resistor networks and the LM1889 before ...
    guesser guesser September 2011 Sinclair Miscellaneous
  • Is this pure bulls@*t or what?Read [URL="http://www.ebay.co.uk/itm/SINCLAIR-ZX-SPECTRUM-PLUS-48K-REFURB-COMPOSITE-OUT-/170691876340?pt=UK_VintageComputing_RL&hash=item27be0755f4#h…

    ... has to be derived by resistor networks and the LM1889 before ... amplifier (with a 50 ohm resistor from the emitter to ground).
    Winston Winston September 2011 Sinclair Miscellaneous
  • Is this pure bulls@*t or what?Read [URL="http://www.ebay.co.uk/itm/SINCLAIR-ZX-SPECTRUM-PLUS-48K-REFURB-COMPOSITE-OUT-/170691876340?pt=UK_VintageComputing_RL&hash=item27be0755f4#h…

    [QUOTE=Winston;562786]50 ohm resistor[/QUOTE]

    75 ohm shirley
    guesser guesser September 2011 Sinclair Miscellaneous
  • Is this pure bulls@*t or what?Read [URL="http://www.ebay.co.uk/itm/SINCLAIR-ZX-SPECTRUM-PLUS-48K-REFURB-COMPOSITE-OUT-/170691876340?pt=UK_VintageComputing_RL&hash=item27be0755f4#h…

    ... collector amplifier with a 75R resistor doesn't actually provide 75 ... complex than just taking the resistor value).
    Winston Winston September 2011 Sinclair Miscellaneous
  • +3 sound and mic outputI own a +3 since 198... dunno, it was hard to get it that's all I remember. The thing is it never saved on tape correctly. I read years ago it may be…

    ... practical difference with the one resistor solution? Better sound?

    Juanma Juanma September 2011 Hardware
  • +3 sound and mic outputI own a +3 since 198... dunno, it was hard to get it that's all I remember. The thing is it never saved on tape correctly. I read years ago it may be…

    ... practical difference with the one resistor solution? Better sound?[/QUOTE]
    resistor the sound was still distorted ...
    guesser guesser September 2011 Hardware
  • 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.…

    ... I could replace the 1k resistor in the +3 12V line ... is the purpose of the resistor on the 12V line anyway ...
    protek protek September 2011 Hardware
  • 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.…

    ... I could replace the 1k resistor in the +3 12V line ... is the purpose of the resistor on the 12V line anyway ...
    orange orange September 2011 Hardware
  • 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.…

    ... the cable length. The internal resistor makes the 12V line yield ...
    protek protek September 2011 Hardware
  • 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.…

    ... the cable length. The internal resistor makes the 12V line yield ... small current through the internal resistor, thus very small voltage drop ...
    orange orange September 2011 Hardware
  • 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.…

    ... to reduce the 1K internal resistor to less than about 847 ...
    orange orange September 2011 Hardware
  • ZX 128 keyboard woesJust scored a 128K speccy at a fair, but it has some wierd problem with the keyboard. It seems that some keys are 'stuck' or not registering properly…

    ... time before it becomes a resistor rather than a conductor lol ...
    Zetr0 Zetr0 October 2011 Hardware
  • Need a new speaker for my rubber key speccyBought a rubber key speccy over a year ago. Was in very good condition but noticed no noise when pressing keys. I took the little speaker out and hav…

    ... the speakers. Also added a resistor to the connection on the ... the impedance by adding a resistor you'll get either the ...
    gtsamour gtsamour October 2011 Hardware
  • Alternative power supply for a +2B?Hi friends, On impulse, I recently bought a ZX Spectrum +2 (unit only, untested) on eBay, thinking that the cables (specifically the power supply) o…

    ... a link across the 1K resistor at the RGB socket (so ...
    nuggetreggae nuggetreggae October 2011 Hardware
  • Dead Spectrum SocietySo I'm getting back into real Sinclair computers rather than emulators. During the summer months I was lucky enough to buy a working ZX81 and was giv…

    ... 'extra' (=parallel) load behind a resistor in series. A value significant ... the design expects. Find the resistor in series met -5V, measure ...
    roko roko October 2011 Hardware
  • Dead Spectrum SocietySo I'm getting back into real Sinclair computers rather than emulators. During the summer months I was lucky enough to buy a working ZX81 and was giv…

    ... 'extra' (=parallel) load behind a resistor in series. A value significant ... the design expects. Find the resistor in series met -5V, measure ... find the zener and the resistor?
    absinthe_boy absinthe_boy October 2011 Hardware
  • Merging romsHello, I want to flash an eprom with two roms so I can make a speccy be able to have a dual rom using an external switch. I thought i had it right b…

    ... needs two diodes and a resistor. Works like a charm and ...
    gtsamour gtsamour November 2011 Hardware
  • Dead 128K heatsinkUnfortunately my 128K heatsink died suddenly and with no apparent reason. I had the Kempston Pro interface connected and when i powered it on the ztx…

    ... shortcirquited capacitor somewhere, a blown resistor, a blown diode who knows ...
    gtsamour gtsamour November 2011 Hardware
  • Dead 128K heatsinkUnfortunately my 128K heatsink died suddenly and with no apparent reason. I had the Kempston Pro interface connected and when i powered it on the ztx…

    ... shortcirquited capacitor somewhere, a blown resistor, a blown diode who knows ...
    roko roko November 2011 Hardware
  • Dead 128K heatsinkUnfortunately my 128K heatsink died suddenly and with no apparent reason. I had the Kempston Pro interface connected and when i powered it on the ztx…

    ... /> I'll check all the resistor values in the power cirquit ...
    gtsamour gtsamour November 2011 Hardware
  • Dead 128K heatsinkUnfortunately my 128K heatsink died suddenly and with no apparent reason. I had the Kempston Pro interface connected and when i powered it on the ztx…

    ... right? Not like a precision resistor for example that has special ...
    gtsamour gtsamour November 2011 Hardware
  • Dead 128K heatsinkUnfortunately my 128K heatsink died suddenly and with no apparent reason. I had the Kempston Pro interface connected and when i powered it on the ztx…

    ... right? Not like a precision resistor for example that has special ...
    roko roko November 2011 Hardware
<1…20212223242526…34>

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