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Search Again :: Adv Search 292 results in 0.000s
<1…45678910>
  • Spectrum CapacitorsLooking for some opinions here, if I may? In the 80's and 90's I used to repair Spectrums and other machines for a living so I'm reasonably famili…

    ... , in the service manual the 1uF that lives under the heatsink ...
    1024MAK 1024MAK September 2015 Hardware
  • Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …

    ... on the blue ones says 1uf 16v. (not 10uf).The orange ...
    harriusherbartio harriusherbartio October 2015 Hardware
  • Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …

    ... on the blue ones says 1uf 16v. (not 10uf).The ... these.[/quote]
    The 1uF is the value of the ... value (so replace a 1uF with a 1uF). If you cannot ... able to find a new 1uF 16V, but you should ... able to find new 1uF 50V or 1uF 63V electrolytic capacitors - ...
    1024MAK 1024MAK October 2015 Hardware
  • Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …

    ... as C3, C5, C6 and C8 on the PCB.
    The ...
    1024MAK 1024MAK October 2015 Hardware
  • Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …

    ... possible to replace a 1uF electrolytic with a 1uF ceramic type. Indeed ...
    1024MAK 1024MAK October 2015 Hardware
  • ZX Spectrum+ video ? red on green problemThis is my first post on the forum, so let me introduce myself. I am retired for several years. For 30 years I have been a fan of the ZX Spectrum. I …

    ... , why the choice of a 1uF capacitor on the path of ...
    Renegade Renegade November 2015 Hardware
  • Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…

    ... carefully at capacitors C5 to C8 in this photo, you'll ...
    memrah memrah December 2015 Hardware
  • Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…

    ... carefully at capacitors C5 to C8 in this photo, you'll ...
    Zorn Zorn December 2015 Hardware
  • Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…

    Re: capacitors C5 to C8, some ceramic capacitors are coated ...
    1024MAK 1024MAK December 2015 Hardware
  • Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…

    Best thing I found for reducing video interference was replacing C5 to C8 (the 12v decoupling caps for the lower RAM) with 1nf ceramics. On mobile at the moment, but if you search my post history you'll find it :)

    B
    balford balford December 2015 Hardware
  • Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…

    ... interference was replacing C5 to C8 (the 12v decoupling caps for ...
    1024MAK 1024MAK December 2015 Hardware
  • Dead issue 3b with black and white barsHi all, I've been donated an issue 3b which has some nice black and white bars with a few flashing blocks. I've done a few RAM tests and could spo…

    ... cap I have is a 1uf so I used that in ...
    Jet5y Jet5y December 2015 Hardware
  • Dead issue 3b with black and white barsHi all, I've been donated an issue 3b which has some nice black and white bars with a few flashing blocks. I've done a few RAM tests and could spo…

    ... fine. As is using a 1uF capacitor. The capacitor is used ...
    1024MAK 1024MAK December 2015 Hardware
  • A tally on the number of successful builds of the Harlequin[SIZE=4][COLOR=Green][U][B]A tally on the number of successful builds of the Harlequin.[/B][/U][/COLOR][/SIZE] Please post your successes below :-) …

    ... touch the left leg of C8 (100nF) with my probe, the ... a simple ceramic capacitor for C8.

    Pic of measuring ...
    bverstee bverstee January 2016 Hardware
  • 12V ripple with lower ram installedI repaired a speccy this week. Before doing anything I replaced all caps and measured the transistors in the power section. When doing this I found t…

    ... itself (although changing these for 1uf ceramics can have a noticeable ...
    balford balford April 2016 Hardware
  • Bored of the Rings coded messageI was browsing [url="https://tcrf.net/"]The Cutting Room Floor[/url] recently and stumbled upon the entry for [url="https://tcrf.net/Bored_of_the_Rin…

    ... 66 67 00 00 33 C8 24 79 40 F9 C5 ...
    richl richl May 2016 Games
  • Bored of the Rings coded messageI was browsing [url="https://tcrf.net/"]The Cutting Room Floor[/url] recently and stumbled upon the entry for [url="https://tcrf.net/Bored_of_the_Rin…

    ...
    D0 D4 7B 2A C8 A8 7B E2 CD 20 ...
    Battle Bunny Battle Bunny June 2016 Games
  • Speccy 128k Toastrack capacitorsDoes anyone have a list of all the electrolytic capacitor values in a speccy 128k toastrack they could post...I've looked around and see plenty for …

    ... video/analogue supply
    C27 1uF 100V or 50V / 63V Axial ... +12V video supply
    C123 1uF 100V or 50V / 63V Axial ... ULA sound
    C127 1uF 100V or 50V / 63V Axial ...
    1024MAK 1024MAK September 2016 Hardware
  • Speccy 128k Toastrack capacitorsDoes anyone have a list of all the electrolytic capacitor values in a speccy 128k toastrack they could post...I've looked around and see plenty for …

    ... video/analogue supply
    C27 1uF 100V or 50V / 63V Axial ... +12V video supply
    C123 1uF 100V or 50V / 63V Axial ... ULA sound
    C127 1uF 100V or 50V / 63V Axial ...
    britain4 britain4 October 2016 Hardware
  • Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …

    ... a .I found the label "+C8" on the PCB next to ...
    harriusherbartio harriusherbartio October 2016 Hardware
  • Shimmering displayHi all, I've got a 48K issue 4S and it appears to be working apart from it's displaying weird vertical shimmering patterns. It passes a RAM test t…

    ... where C5, C6, C7 and C8 are talked about:
    http ...
    1024MAK 1024MAK November 2016 Hardware
  • Shimmering displayHi all, I've got a 48K issue 4S and it appears to be working apart from it's displaying weird vertical shimmering patterns. It passes a RAM test t…

    I was wondering about those, I've got some 1uf ceramics after I bought some reading those exact articles. I'll give it a go. Cheers.
    Jet5y Jet5y November 2016 Hardware
  • +2 tape input protectionI'll start this by admitting I've not checked on a 48K or Toasty-Rack diagram to see how the tape input is actually wired in but what I'm asking is f…

    ... un-connected pin via a 1uF capacitor to where D200, D201 ...
    guesser guesser January 2017 Hardware
  • +2 tape input protectionI'll start this by admitting I've not checked on a 48K or Toasty-Rack diagram to see how the tape input is actually wired in but what I'm asking is f…

    ... un-connected pin via a 1uF capacitor to where D200, D201 ...
    spider spider January 2017 Hardware
  • I've Killed my BBC Micro :(So, today I pluged in my BBC Micro via my step up converter. It did the customary double beep. I was buzy tuning in the LCD tv to it, as I'd lost the…

    I see that C1 is a 0.1uf x2 rated capacitor. I have a 0.22uf x2 capacitor. Given the function of C1 which bridging the live and neutral (so I assume smoothing/filtering), can I use my 0.22uf x2 in place of the 0.1uf x2? They are both rated for 275 volts.
    Scottie_uk Scottie_uk January 2017 Chit chat
  • I've Killed my BBC Micro :(So, today I pluged in my BBC Micro via my step up converter. It did the customary double beep. I was buzy tuning in the LCD tv to it, as I'd lost the…

    Ah I see, itas actually C2 thats 0.1uf x2 and C1 that is 0.01uf x2. So its my C2 thats gone. I think I may change em both.

    In the mean time I'll put the 0.22 in for C2 and use that as a temporary arrangement.
    Scottie_uk Scottie_uk January 2017 Chit chat
  • Which capacitors are electrolytic?Hi! I'm refurbishing my 48k issue 6a, and as recommended by many (and not recommended by some) I'm going to replace the electrolytic capacitors. Mind…

    These C44&C45 are also electrolytic capacitors (100uF/16V).

    C27 is between the reset line and GND of Z80 and its capacitance is 1uF (electrolytic one). Any capacitor with working voltage 10V or more would be fine.
    Claudius Claudius February 2017 Hardware
  • Spectrum 48k Power Supply?Guys - I've got a Spectrum 48k inbound from the UK. I want to scrounge a power supply to use when it arrives. What size jack did it use and what ar…

    ... axial type:
    3 x 1uf
    1 x 4.7uf ...
    Claudius Claudius February 2017 Hardware
  • Spectrum 48k Power Supply?Guys - I've got a Spectrum 48k inbound from the UK. I want to scrounge a power supply to use when it arrives. What size jack did it use and what ar…

    ... axial type:
    3 x 1uf
    1 x 4.7uf ...
    msansom msansom February 2017 Hardware
  • Spectrum 48k Power Supply?Guys - I've got a Spectrum 48k inbound from the UK. I want to scrounge a power supply to use when it arrives. What size jack did it use and what ar…

    ... axial type:
    3 x 1uf
    1 x 4.7uf ... ?

    [/quote]

    1uF & 4.7uF you would ...
    Claudius Claudius February 2017 Hardware
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