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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…
... that work then? cause the regulator still has to waste the ... [/URL] housing? Better regulator-heatsink contact -> regulator temperature closer to heatsink ... long as regulator+heatsink combo is up to the job), 7805's ... -
Maximum number of Spectrum devicesHi! What is maximum number of devices i can connect to my rubber key Spectrum? Is there somekind of limit? Now i have Interface 1, Microdrive, Zx p…
... )
Only internal voltage regulator 7805 i replaced by 3A switching ... regulator. I think, it was not ... -
Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…
... /> Also can't tell whether regulator says 7805 or 7809... :grin: -
Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…
[QUOTE=RetroTechie;489308]Also can't tell whether regulator says 7805 or 7809... :grin:[/QUOTE]
Looks like 7809 to me...;) -
Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…
... than not).
[*] Replace 7805 with efficient switching regulator & minimize / remove ... -
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…
... replace with at least 2A regulator. Only exception would be if ... pictures, there's a regular 7805 (1A). Here it is [URL ... my QLs only different brand 7805 (MC: Microcirquit)
The ... QL service guide : 78S05 2A regulator can be used, but hardly ... -
Fully integrated ZX+Hi, I just want to show some inspiration for integration HW to ZX+ case ;-) - ZX48 issue 3 board, without all parts regarding video generating (pa…
... used instead of original one. 7805 just bridged by wire and ... because no heat from 5V regulator, temperature is fine. -
Fuzzy Screen On 48k Spectrum.Hi there. I bought a Spectrum off eBay last week (another for my collection lol), and it suffers with a fuzzy screen e.g. it looks like interference …
Voltage regulators like 7805 always need [I]some[/I] ... ; their filter function reduces, the regulator basically gets a more [I ... like ZX Spectrum, replacing the regulator as well could be a ... (I suspect) usually pointless if regulator isn't broken & filter ... -
Zx Spectrum 48k+ black screenHi A friend of mine gave me his 48k+ and when i tried to turn it on I just get a black screen of the TV. I don't have sound of the console. Where c…
... . the ZX spectrum uses a 7805 5volt regulator - its right near the ... .alldatasheet.com/view.jsp?Searchword=7805]click here[/url] as you ... at a 3 terminal 5volt regulator.
either of those ... the ability of the 5volt regulator.
If its any ... -
Zx Spectrum 48k+ black screenHi A friend of mine gave me his 48k+ and when i tried to turn it on I just get a black screen of the TV. I don't have sound of the console. Where c…
... ZX spectrum uses a 7805 5volt regulator - its right near ... com/view.jsp?Searchword=7805]click here[/url] as ... at a 3 terminal 5volt regulator.
either ... the ability of the 5volt regulator.
If ... to check the voltage regulator as soon as I ... -
DivIDE+ and the 48k SpeccyI've 3 48k speccies of various revisions and none of them are working with my DivIDE+ yet all my 128's do, yet I'm sure when I first had it I'm sure …
... Speccy without a heatsink the 7805 (linear regulator) will need to be ... . There are various switch mode 7805 subsitutes, some requiring some external ... remember someone discussing some SMPS 7805 replacements a while back. -
heatsink on the grey+2anyone ever modded one to run without the heatsink? I know some have on the 48k's but I wouldn't mind removing it from one of mine. If so, any tips …
... the regulator to a minimum.
The bog standard 7805 requires ... -
Grey +2 regulatorIv just checked the regulator and its a TS2940. Could someone tell me the equivalent please?
... (Grey) model it is a 7805 5volt regulator.
I have ... ebay.co.uk/5-x-7805-1A-Fixed-Voltage-Regulators-/320430515613 ... here: 5x 7085 5volt Fixed Regulator 1Amp
[img]http:// ... paste/grease/compound between the regulator and the large heatsink when ... -
Grey +2 regulatorIv just checked the regulator and its a TS2940. Could someone tell me the equivalent please?
... this means when the the regulator needs the current it is ... used a fixed 5 volt regulator (7805). currently my 128 +2 has ... -
Grey +2 regulatorIv just checked the regulator and its a TS2940. Could someone tell me the equivalent please?
... ) regulator. this could be replaced with a regualr 7805, ... co.uk/L78S05CV-78S05-REGULATOR-5V-/190504555499?pt=UK_BOI_Electrical_Components_Supplies_ET ... eBay BIN L78S05CV 5volt 2amp regulator ?0.99 + ?1 ... on the PCB before the regulator died LOL ;)
Grey +2 regulatorIv just checked the regulator and its a TS2940. Could someone tell me the equivalent please?
... -fixed) regulator. this could be replaced with a regualr 7805, which is ... that this IS the original regulator that should be there in ...Grey +2 regulatorIv just checked the regulator and its a TS2940. Could someone tell me the equivalent please?
... drop out) (non-fixed) regulator.[/quote]
It's ... original (factory mounted) voltage regulator. Originally should be 78[ ... replaced with a regualr 7805, which is used on ... in ZX128 is an ordinary 7805, but in ZX+2 ... had a 78S05 voltage regulator. If there is a ...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…
... instead of the wasteful linear regulator. You can run everything on ... & 26 and changing crappy 7805 by tracopower 2150, I hope ...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…
... were finally:
* Rip of Regulator 7805 and put new tracopower 2145 ...New speccy modelThe 48k toastrack ;) [img]http://alistairtesting.no-ip.org/48k-toastrack.jpg[/img]
... toastrack uses a 1 Amp 7805. Did you use 1 ... yield the RECON regulator has. I mean the 7805 has very small ... question is if the 2Amp 7805 with the bad yield (thus ... same as a 2A recon regulator (if there was one).
7805 (with the 97% yield ...New speccy modelThe 48k toastrack ;) [img]http://alistairtesting.no-ip.org/48k-toastrack.jpg[/img]
... yield the RECON regulator has. I mean the 7805 has very small ... question is if the 2Amp 7805 with the bad yield ... same as a 2A recon regulator (if there was one).< ... be better than the 2A 7805 (with the 97% yield ... great, but whats about 7805, how much yield does it ...New speccy modelThe 48k toastrack ;) [img]http://alistairtesting.no-ip.org/48k-toastrack.jpg[/img]
... "equivalents".
The 7805 is indeed "old technology" but ... used widely today. 7805 is a linear regulator, on the cotrary ... RECOM is "switch regulator"... different ways to do ... more efficiently with the switch regulator.
When you ...New speccy modelThe 48k toastrack ;) [img]http://alistairtesting.no-ip.org/48k-toastrack.jpg[/img]
... 7805 the 48k has originaly, even the 128k heatsink has 1A regulator ...Sinclair QL ProblemHi there. I purchased recently four Sinclair QL for a not small amount of money. Two german and two english, they are mixed: British or European conn…
... DC converters to replace the 7805 (10x 1 Ampere and 5x ... a heatsink and a QL regulator!Sinclair QL ProblemHi there. I purchased recently four Sinclair QL for a not small amount of money. Two german and two english, they are mixed: British or European conn…
... a QL regulator![/QUOTE]
I have some 7805 up to ...128K blues, part +2: picture and tape driveI recently purchased an original (grey) +2 which sadly seems not to be fully working. The computer powers up but there is no way to obtain a stable p…
Try to replace the 7805 power regulator, its very easy to do, its the three legged thing attached on the heatsink. The fact that you cant get a stable rf picture suggests the problem isnt the rgb cable.128K blues, part +2: picture and tape driveI recently purchased an original (grey) +2 which sadly seems not to be fully working. The computer powers up but there is no way to obtain a stable p…
... ;538038]Try to replace the 7805 power regulator, its very easy to ...48k dots appear but not with CUB monitorToday I tried out an issue 3 and an Issue 2 with the CUB monitor, to my surprise they both worked flawlessly, now before when I tried them on any oth…
@Macc
how old's and how hot is the 5v internal regulator getting?
are you using a standard 7805 or a two amp 78s05?Dead 128 ToastrackHi! I bought 128 toastrack motherboard and seller said it's working. Maybe it was when he sent it but motherboard was only put into envelope. So it …
Yes I have working power supply because I have working 128.
As I said I'm not an expert so is the regulator same in 48K and 128K? I have spare regulators for 48K (printed 7805) and in 128's regulator has print 7805CSP.
IppeZX Spectrum + alive thanks to this site.I was given a dead unit several months ago. I finally had time to look at it yesterday. Using the repair guide on this site the thing is now alive.…
... may go for a different regulator, as recommended by Alien 8 ... /> Did I recommend a different regulator? I remember I had a ... end we just changed the 7805 for a new unit, it ...
