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Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... them. But first, check the coil - if it has shorted turns ... -
Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... [/url]).
A damaged coil sometimes has the coils looking ... -
Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... /> I'll check out the coil and see if I can ... -
ZX Spectrum Test PCB I recently read about one of these (I think it may have been the Retroleum site but I am not sure) and I thought "What a great idea" . As pictured …
... circuitry (TR4, TR5 and the "coil" and associated components), modify this ... -
What is the oldest bit of machinery in regular use in your workplace?What's the oldest bit of machinery anyone has ever used regularly in the work place? Where I am now, very old building, mostly modern stuff. Previ…
... of thicknesses and then the coil of rope had to be ... -
Issue with TV signal + Inductor Coil (16K Issue 2 Speccy)Hello guys, I just got a 16K Issue 2 Speccy from eBay. It was sold as not working so I knew there would be some work needed before it's working ag…
... the transistor end of the coil will vary depending on a ... TR4 and TR5 and the coil are working correctly (which they ... -
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 …
... (C50 and C34?) near the coil at the top RHS of ... -
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 …
... replaced (the ones near the coil)
2) It gives ... -
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 …
... these 2 caps nearest the coil . I have bought a new ... -
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 …
... (the 2 caps nearest the coil) does not seem to have ... -
48k Issue 6a Very sick indeed.Hi Guys. I have a 48k Issue 6a board that shows a white screen with grey border. The white screen has three black squares spaced equally on the le…
... hear any whine from the coil.[/quote]
The ... operating frequency, so the "coil" is not being pulsed ... these two supplies are the "coil" (actually a small transformer ... TR4, TR5 and the "coil". Also it is good ... secondary winding of the "coil" and cause it to ... -
48k Issue 6a Very sick indeed.Hi Guys. I have a 48k Issue 6a board that shows a white screen with grey border. The white screen has three black squares spaced equally on the le…
... I have swapped out the coil from another 48k board. I ... see any issues with this coil and checking the resistance using ... -
ZX Spectrum Issue 2 - 12V badHey there, I'm currently attempting to fix a ZX Spectrum issue 2 that I recieved. Overall the machine was generally working when I recieved it, bu…
... the secondary winding of the "coil" (actually a transformer) from the ... -
Spectrum plus started smoking.Yes, it did. And then it stopped working. Is there a likely problem that is fairly easily repairable? I'm very upset and don't know what to do. …
... it, my guess is the coil in the DC-DC circuitry ... -
Broken Issue 2 - likely culpritsI've just got hold of an issue 2 spectrum with an interesting layout (heatsink is vertical and goes down to the speaker, some variable resistors and …
... inductor for continuity of each coil and for shorts between them ... -
Broken Issue 2 - likely culpritsI've just got hold of an issue 2 spectrum with an interesting layout (heatsink is vertical and goes down to the speaker, some variable resistors and …
Coil seems fine
I removed both transistors and checked the voltage drops which all read 680mv so they seem within tolerance. -
I've made it, the big five oh!I don't normally make a big thing about this sort of thing, but I've hit the big mile stone of my life and wanted to shout it out... I'M FIFTY. …
... mates jump off the mortal coil than I have, sad but ... -
Can an emulator send and receive via a PC's USB port?Interesting little question arises out of a conversation today with my son who is taking a Rockwell automation course. His latest test was to write …
... reed switch can break the coil feed. All this is old ... -
help with issue 3 48k speccy after recap and new tr4 and tr5I have a 48K speccy that was not working. After recapping and replacing TR4 and TR5 it came back to life However after a short while running weird …
... .
TR4, TR5, the coil (actually a transformer) and associated ... -
what components normally get taken out if you plug+unplug a joystick interface in with the power onwhat components normally get taken out if you plug+unplug a joystick interface in with the power on? i remember doing this a few times when i had …
... and TR5, and maybe the coil (all part of the DC ... -
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…
... machine even has a handwound coil ;)
Of course I don ... -
Best internal AY mod for ZX 48K?I have a recapped and composite modded 48K running just fine :) I'm looking for to have a sd card interface (div mmc future) + AY for the computer. H…
... personal favorite remains the selfwound coil, held together by heat shrink ... -
48K Issue 3B slowly fading over 15-20 seconds, capacitor gets hot.Hi folks, Recently my much-modified* RAM testing 48K board failed with a hot/burny smell so I turned it off quickly for looking at later. Thinking…
... the -5V are correct, the coil MUST be working.
If ... -
Another Spectrum is brought back to life.Hi Spec-chums. I have been having bit of busy afternoon with repairs today. I've brought back to life a Panasonic Super-VHS recorder, and more intere…
... chips, panel switches, and moving coil meters... You've got to ... -
Modifying a speccy to +5v only operation.Just a thought experiment so far. Let's say i wanted to make a more resilient spectrum by getting rid of the DC-DC converter circuit. This would remo…
... remove TR4, TR5 and the coil.
That will keep ... -
Help request for an injured Issue 4A spectrumHi folks, I'm hoping to resurrect an issue 4A spectrum that has been in my hoard for a couple of decades since buying it for spares. Someone ha…
... /> The whining noise from the coil is not unusual. The coils ... -
Correction of +2 hardware errorsThis is a collection of various pieces of information picked up from various places, including a lot from this forum. I have edited it and reworded i…
... that is connected with its coil parallel to the motor. Cut ... -
Correction of +2 hardware errorsThis is a collection of various pieces of information picked up from various places, including a lot from this forum. I have edited it and reworded i…
[url]https://uk.farnell.com/w/c/switches-relays/relays/reed-relays/prl/results?coil-voltage=5v|5vdc&relay-mounting=through-hole&range=inc-in-stock|exc-delivery-surcharge&sort=P_PRICE[/url]
[b][i]Mark[/i][/b] -
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…
... -connector and next to the coil is another socket (although on ...
