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7805 Regulator HelpI am hoping to replace the 7805 regulator in my issue 3 48K Spectrum soon. Unfortunately I don't know exactly what to buy to replace it with (my fat…
... am hoping to replace the 7805 regulator in my issue 3 ... to a supplier for a 7805 that requires no heatsink, but ... -
Question about 7805 regulatorOne of my common practices when I service a ZX machine, is to replace the electrolytic caps as well as the 7805 regulator and some times the ztx650 t…
... caps as well as the 7805 regulator and some times the ... ZX machines used the same 7805 voltage regulator but totally by ... -
7805 cooler replacement?I have been looking into finding some replacement for the 7805, since that single component generate a lot of heat. Been looking at switching alterna…
... finding some replacement for the 7805, since that single component generate ... -
7805 on PlusD needed?I am planning a batch of PlusD interfaces. As I do not have a board design file (for e.g. Eagle), I am redesiging the PlusD schematic in Eagle myself…
... wondering: is the voltage regulator (7805) on the PlusD really necessary ... -
7805 Regulator to RECOM modI really need to get shot of some of the 7805 regulators in some of my Spectrums. Latent heat is affecting keyboard membranes etc. As I am not a ha…
... shot of some of the 7805 regulators in some of my ... " the same way as the 7805 does
[*]Do I require ... -
7805 RegulatorGonna order some spares off CPC and I need a regulator for a 48k 3b. Any quick advice on which one of these is best ? [URL="http://cpc.farnell.com/…
... &Ntk=gensearch&Ntt=7805+regulator&Ntx=mode+matchallpartial ... &Ntk=gensearch&Ntt=7805+regulator&Ntx=mode+matchallpartial ... -
New to Spectrum -- Is my 7805 bad?So I just got my first ZX Spectrum (I have TS-1000 and a ZX81). Anyway, first thing I did was watch this video from JoulesperCoulomb on first tes…
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Well, it seems my 7805 voltage regulator is only showing ... other device that uses a 7805 (well, one other device with ... /> So, more than likely the 7805 is dead right? I haven ... -
Speccy MTBFHi, Looking at the old (issue 1-2) PCBs, they do look like someone knocked them up in an etching bath/with a soldering iron in their shed but has th…
... ? I should imagine that the 7805 voltage regulator and [drink spill ... -
ULA chipHi. Where i can find a ULA 6C001E-6 chip for an 3B issue Speccy ? Also looking for one 7805 heatsink... Thank
Hi.
Where i can find a ULA 6C001E-6 chip for an 3B issue Speccy ?
Also looking for one 7805 heatsink...
Thank -
TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…
... it looks just like the 7805 regulator (it has a metal ... -
WHERE: Best sources for repairing Sinclair hardwareI already collected quite some information, like the official repairers guide, but still got loads of hardware that I'm not able to repair. Any point…
... come much further then replacing 7805's and transistors (which solves ... -
Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…
... to overheat and shatter. The 7805 regulator also blew up causing ... -
ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …
... the spectrum and checked the 7805 chip (the one near the ... -
PC Power supply for SpeccyHi all, after 13 years with out playing spectrum games I am eager to play the old games. Thus I got up to the garret checking my old stuff. Two of m…
... . I want to remove the 7805 and put the 5V to ... -
PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …
... +12v and relying on the 7805 (I think it will overheat ... ), using +5v and bypass the 7805 or use another voltage regulator ... -
4164 and 4864 ChipsI have a stock of 4164, 4864 memory chips and 7805 voltage regulators if anyone needs them. Cost would be ?1.50 each plus postage for anyone on here…
I have a stock of 4164, 4864 memory chips and 7805 voltage regulators if anyone needs them. Cost would be ?1.50 each plus postage for anyone on here!
They are mainly 20ns
Rich -
R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…
... be used instead of the 7805 type (to reduce the heat ... -
What's this hardware?[URL="http://www2.snapfish.com/slideshow/AlbumID=1351742020/PictureID=39192676020/a=1759991020_1759991020/otsc=SHR/otsi=SPIClink/COBRAND_NAME=snapfis…
... 27c256 EPROM. There is a 7805 and a 7812 voltage regulator ... -
Repair options for my own dear old Spectrum 48k?Hello all, This is my first post to this wonderful forum, which is part of a truly great website! My name is Arnold, and I live in Utrecht, The Nethe…
... details: I have measured the 7805 regulator, its upper pin is ... -
Two Odd Spectrum 128K FaultsI also have 2 Spectrum+128 machines with heatsinks. 1. Did not power up properly - I replaced the 7805 regulator and cleaned the edge connector and …
... up properly - I replaced the 7805 regulator and cleaned the edge ... -
48 Issue 3b working but very hot ula and cpuSalve to everybody I bought from e*ay an Issue 3b 48k , fitted in a + case. Fixed the keyboard problem with a new keyboard membrane from good Rwap (w…
... symptoms were present before the 7805 substitution too. Just for fetishism ... -
Who can repair a 48K Spectrum?My Spectrum is broken, please see: [url]http://www.worldofspectrum.org/forums/showthread.php?t=29351&highlight=7805+heat+sink&page=2[/url] Does anyb…
My Spectrum is broken, please see: [url]http://www.worldofspectrum.org/forums/showthread.php?t=29351&highlight=7805+heat+sink&page=2[/url]
Does anybody know a reliable spectrum repair service? -
Boxed Spectrum 128+ on eBay.[url]http://cgi.ebay.at/ws/eBayISAPI.dll?ViewItem&item=110614739461&ssPageName=STRK:MESELX:IT[/url] The only modification is replaced 7805 1A with th…
[url]http://cgi.ebay.at/ws/eBayISAPI.dll?ViewItem&item=110614739461&ssPageName=STRK:MESELX:IT[/url]
The only modification is replaced 7805 1A with the 3A type. -
Question about ZX81 componentAfter I cleaned and replaced some components (7805, two electrolytic caps) with fresh ones, and replaced the RF board with a composite one, on an iss…
... cleaned and replaced some components (7805, two electrolytic caps) with fresh ... -
ZX spectrum +2 issue3 (gray) videoout problemHi! Have distorted flickering image on ZX spectrum +2 gray issue3. RGB connection thru sony CXA rgb->svideo coder (Good quality! but flickering) [ur…
... and i have +5V after 7805
Sony CXA coder tested ... -
Question about QL composite modI am servicing my two QL machines (capacitor replacement, pcb and plastics cleaning, microdrives head cleaning, 7805 replacement etc). I already fin…
... plastics cleaning, microdrives head cleaning, 7805 replacement etc).
I ... -
Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…
... the above will change the 7805 by the TRACOPOWER 2150, change ... -
Upgrading the Humble Spectrum 128 +2 (Grey)Hello there my fellow WoS'ers I am at a subtle in-pass in my wants for one of my +2 motherboards. I received this mobo, DOA in a job lot from fleab…
... had gotten into it) and 7805 regulator was as dead as ... -
rubber key Spectrum 48k problem :(when i plug the spectrum in all i get is a black screen with a red border and sometimes flashing blocks. the spectrum worked until about 20 mins ago…
... can start fault finding (the 7805 has been checked), i have ... -
RECOM pin compatible DC-DC 7805 regulator replacementsFinally got myself sorted out now. If you want to purchase chips send me an email to [email]alistair@alistairsserver.no-ip.org[/email] with your payp…
Finally got myself sorted out now. If you want to purchase chips send me an email to [email]alistair@alistairsserver.no-ip.org[/email] with your paypal details and how many chips you want.
The final price is ?6 each plus postage.
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