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  • Spectrum USB KeyboardI know you can buy these but how do you make one . What I am thinking of be similar to the type described in Issue 1352 of Micro Mart at page 45 .The…

    First st test (DK keyboard labeled as Keyboard ... small PCB one) works in a DK case so the test is ...
    harriusherbartio harriusherbartio March 2020 Hardware
  • Miscellaneous ZX81 stuffI was not sure where to put this . As it is not Speccy related I had a dilemma . Should it go in Chit Chat . But then I had a better idea : if I call…

    ... are some photos of my "test" ZX8-CCB set-up connected ... the modulator (remove the existing PCB in the modulator) and put ...
    1024MAK 1024MAK March 2020 Sinclair Miscellaneous
  • Dk'tronics and other similar "add on" Speccy keyboards . What can be done with them and when?. The underlying assumption I am making here is that people who have them will want to "hang on" to them and may also want to get them working . But …

    ... be" ZX Spectrum one!) and test for differences in continuity.
    PCB to the YELLOW connector on ... cable) gets continuity from the PCB to the PURPLE connector. This ... , (white cable) gets continuity from PCB to WHITE connector on all ...
    harriusherbartio harriusherbartio March 2020 Hardware
  • Miscellaneous ZX81 stuffI was not sure where to put this . As it is not Speccy related I had a dilemma . Should it go in Chit Chat . But then I had a better idea : if I call…

    ... work for this type of TEST .(so I have answered my ... arrived in the post ( the PCB are pretty small) so I ...
    harriusherbartio harriusherbartio March 2020 Sinclair Miscellaneous
  • Miscellaneous ZX81 stuffI was not sure where to put this . As it is not Speccy related I had a dilemma . Should it go in Chit Chat . But then I had a better idea : if I call…

    ... up" . Was that so the PCB remains "untouched" and pristine ?. What ... suppliers, search for “mini spring test clip hook” ;)

    [b ...
    1024MAK 1024MAK March 2020 Sinclair Miscellaneous
  • "Self Isolation" and Speccy PCB repair"These Days" of "home self-isolation" , particularly on rainy days , I reckon I will have more time to hone my Speccy PCB repair skills which are s…

    ... thing for gripping the Speccy PCB . Next having tried it out ... able to complete a RAM test . I was lucky as the ...
    harriusherbartio harriusherbartio April 2020 Sinclair Miscellaneous
  • Finding the issue.My sister recently found our old Speccy in her loft and having no interest in retro gaming promptly put it in the bin. Her husband text me and I res…

    ... /play switch mounted on the PCB of the datacorder can cause ... this. Just remember doing this test with a cassette, a write ...
    Your Spec-chum Your Spec-chum April 2020 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…

    ... easier I designed a little PCB based on this circuit to ... the boards to arrive and test them.
    redhawk668 redhawk668 May 2020 Hardware
  • Additional Information , Notes , and Details , re.the Main Windows Edition of Spectaculator There is no lenghy instruction to go with Spectaculator . Mark did a great job adding extra info. with this thread:- [url="https://worldofspectr…

    ... to test it till I get the case as the PCB is ...
    harriusherbartio harriusherbartio June 2020 Emulators
  • Additional Information , Notes , and Details , re.the Main Windows Edition of Spectaculator There is no lenghy instruction to go with Spectaculator . Mark did a great job adding extra info. with this thread:- [url="https://worldofspectr…

    ... used the Konix for this test:-

    This success ... . So far this MONSTER PCB kit appears to be an ... case for the Monster PCB but 2 bits of ... nylon bolts packed with the PCB . So they had sent ... The bits included were:- the PCB itself , the 2 cables for ...
    harriusherbartio harriusherbartio July 2020 Emulators
  • Additional Information , Notes , and Details , re.the Main Windows Edition of Spectaculator There is no lenghy instruction to go with Spectaculator . Mark did a great job adding extra info. with this thread:- [url="https://worldofspectr…

    ... " They are my own design PCB and I have knitted together ... , but in my hands my test results are "one step forward ...
    harriusherbartio harriusherbartio July 2020 Emulators
  • Additional Information , Notes , and Details , re.the Main Windows Edition of Spectaculator There is no lenghy instruction to go with Spectaculator . Mark did a great job adding extra info. with this thread:- [url="https://worldofspectr…

    ... PCB ) seems to be the easiest way to get to the test ...
    harriusherbartio harriusherbartio August 2020 Emulators
  • Additional Information , Notes , and Details , re.the Main Windows Edition of Spectaculator There is no lenghy instruction to go with Spectaculator . Mark did a great job adding extra info. with this thread:- [url="https://worldofspectr…

    ... on the edge of the PCB so the question of ... PCB
    3) Finish off the software side
    4) Test ... and connect it to the PCB inside and have it ... as a "loose mount" PCB inside the relatively big mouse ... an expected error as the PCB is not yet connected. ...
    harriusherbartio harriusherbartio August 2020 Emulators
  • Additional Information , Notes , and Details , re.the Main Windows Edition of Spectaculator There is no lenghy instruction to go with Spectaculator . Mark did a great job adding extra info. with this thread:- [url="https://worldofspectr…

    ... come back from an eye test and my pupils had been ... green light came on the PCB and then a red loght ...
    harriusherbartio harriusherbartio August 2020 Emulators
  • Additional Information , Notes , and Details , re.the Main Windows Edition of Spectaculator There is no lenghy instruction to go with Spectaculator . Mark did a great job adding extra info. with this thread:- [url="https://worldofspectr…

    ... on one side and the PCB on the other side . I ... USB connection s PCB - I did not want to test it to ... "Achilles Heel" of this particular PCB is probably the small USB ...
    harriusherbartio harriusherbartio August 2020 Emulators
  • If Sinclair computers had not been sold...I was just having a random thought. If Sinclair Computers (or the rights to them, not sure how it 'worked' back then) had not been sold to Amstrad…

    ... this transistor (TR6) on the PCB as standard, but again the ... hidden features are the ULA test modes. These have no practical ...
    1024MAK 1024MAK August 2020 Hardware
  • Why is it so hard to produce ZX Spectrum add-on Hardware in the UK.Arguably the UK Spectrum add-on market is stagnating? Why ? Well obviously the ZX Spectrum is a very old retro micro so it's fan base would normall…

    ... .

    * The PCB is designed by a Brazilian ... first few days of test assembly. In those days ... assembly, plastics, mould, pcb so much more cheaply done ... The labour input for pcb comes into setup and ... difference between a plain pcb and a populated one. ...
    Alcoholics Anonymous Alcoholics Anonymous October 2020 Hardware
  • What causes microdrive capacity reduction ... when the microdrive is a vDrive-ZX?I've just had my Spectrum 48K and Interface 1 refurbished and have bought a vDrive-ZX. I'm finding that I cannot copy my Microdrives to the vDrive…

    ... fill up the vDrive with test files to see how much ... saved?

    Edge-connector PCB contacts can be cleaned with ...
    1024MAK 1024MAK November 2020 Hardware
  • Need a new keyboard for Issue 2I've dug out my old Spectrum's today. My +3A and +2 grey are both working perfectly. However, my old early Issue 2 keyboard was replaced with a SA…

    ... keyboard I used for this test (see pic above) . With this ... start again . Doing a QWERTY test I got a Buzz with ... was very handy for this test to clear barbage for a ... up" and settled down. The PCB is unsupported so care is ...
    harriusherbartio harriusherbartio January 2021 Hardware
  • How to Use a real Physical Old Style Retro ZX Spectrum INFREQUENTLY and EFFECTIVELY.These days a lot of WOSSERS use emulators most of the time but like to get out the old Speccy ,every once in a while ,for a quick nostalgic revisit .…

    ... was omitted on my first test of the Penguin yesterday . ... not working . The next test will be whether the ... by holes in the Penguin PCB . So the obvious ... could go underneath the PCB (to support the downward ... pressure on the PCB when it is connected ...
    harriusherbartio harriusherbartio January 2021 Hardware
  • Key Materials ,Concepts , and Ideas for DIY Cases For ZX Spectrum Interfaces.In the 1980's ZX Spectrum Interfaces were largely supplied "cased up" or encased . Nowadays often they are not as they are usually sold as bare PCBs.…

    ... show the ZX Diagnostics PCB cased up with white ... Bolting on" the specially grooved PCB "pads" made from fascia plastic ... went through the diagnostic test . With this PCB , with the default ... software supplied , it ends the test ...
    harriusherbartio harriusherbartio January 2021 Sinclair Miscellaneous
  • Key Materials ,Concepts , and Ideas for DIY Cases For ZX Spectrum Interfaces.In the 1980's ZX Spectrum Interfaces were largely supplied "cased up" or encased . Nowadays often they are not as they are usually sold as bare PCBs.…

    ... in . On this Diagnostic PCB the LEDs test the INTERRUPTS (so it ...
    harriusherbartio harriusherbartio January 2021 Sinclair Miscellaneous
  • 48k ULA heat sink required ?ULA heat sink worthwhile mod or just internet hype ? if worthwhile is a cheap heat sink going to cut the mustard ? i wonder if anybody has done any …

    ... to the PCB to use a heatsink, the no-heatsink test should ...
    guesser guesser October 2021 Hardware
  • 48k ULA heat sink required ?ULA heat sink worthwhile mod or just internet hype ? if worthwhile is a cheap heat sink going to cut the mustard ? i wonder if anybody has done any …

    Mmmm ok so if we need all the variables its : 1. test in socket (no sink) : 2. soldered to pcb (no sink) : 3 soldered to pcb (with sink) : 4 in socket (with heat sink, for plus model) .. and what about liquid cooling !! ha ha ..
    mark8bit mark8bit October 2021 Hardware
  • 48k ULA heat sink required ?ULA heat sink worthwhile mod or just internet hype ? if worthwhile is a cheap heat sink going to cut the mustard ? i wonder if anybody has done any …

    ... to the PCB to use a heatsink, the no-heatsink test should ... case and a smoke match test showed a good throughput of ...
    moggy moggy October 2021 Hardware
  • 48k ULA heat sink required ?ULA heat sink worthwhile mod or just internet hype ? if worthwhile is a cheap heat sink going to cut the mustard ? i wonder if anybody has done any …

    ... : 1. test in socket (no sink) : 2. soldered to pcb (no sink ... ) : 3 soldered to pcb (with sink) : 4 in socket ( ... the local temperature of the PCB and hence the ULA.
    1024MAK 1024MAK October 2021 Hardware
  • Were the full Sinclair Loki specs ever actually known?I was just curious. A lot was leaked to the media, but the exact specs seem different depending on source. Some say it could support up to 512x256 an…

    ... />
    Also, the total PCB size wouldn't have varied ...
    The total extra PCB wouldn't equate to more ... existing spectrums could have provided test-beds for prototype validation. ... br /> 6. Keyboard, Serial, Parallel PCB.
    7. Microdrive / IF1 / ...
    cj7hawk cj7hawk 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…

    ... is fitted to the the PCB, then it will fit. The ... socket, is that my original PCB socket (mounted on an issue ... and as I wanted to test the set-up first, this ... recommended version. The issue 3B PCB does not include this as ...
    1024MAK 1024MAK October 2021 Hardware
  • Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …

    ... :-

    1) The Speccy PCB is difficult to grip .I ... have two PCB grip frames but the Speccy ... PCB falls out of these . As ... CAP at a time then test

    3) If a ...
    harriusherbartio harriusherbartio December 2021 Hardware
  • Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …

    ... screen display I could not test it with a Smart Card ... earlier . All those online clour PCB pics of the motherboard (with ...
    harriusherbartio harriusherbartio December 2021 Hardware
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