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subzero
13th March 2013, 15:45
pleeeeeeeeeeeeeeeeeeeeeeeeeze!!!! needed urgently!

Chinners
13th March 2013, 15:53
Not that I have any, but which model speccy do you have? It might help in sourcing the right one :)

subzero
13th March 2013, 16:06
oh yeah, always forget that bit - 48k rubber keyed version

roy_bates
13th March 2013, 16:11
if its a zx spectrum 16k or 48k just get one of these.

http://www.ebay.co.uk/itm/Behringer-Effects-Pedal-Stomp-Box-GPE182-HSB-9-Volt-UK-power-supply-HSB-UK-/281073236769?pt=UK_Guitar_Accessories&hash=item4171453b21

Chinners
13th March 2013, 16:18
Or if you want a genuine one, http://www.dataserve-retro.co.uk have stock of them

Zetr0
13th March 2013, 16:20
if its a zx spectrum 16k or 48k just get one of these.

http://www.ebay.co.uk/itm/Behringer-Effects-Pedal-Stomp-Box-GPE182-HSB-9-Volt-UK-power-supply-HSB-UK-/281073236769?pt=UK_Guitar_Accessories&hash=item4171453b21

you will need to cut the wire and swap them about as the Spectrum has a negative internal pol, and a positive external one.

http://s6.postimage.org/tjdgh3prl/Spectrum_Power_Coupler.jpg (http://postimage.org/)

That should help you



@Roy

Nice find on the PSU btw!



@Chinners

Good to see you about here my friend, kinda missed you!

Chinners
13th March 2013, 16:27
if its a zx spectrum 16k or 48k just get one of these.

http://www.ebay.co.uk/itm/Behringer-Effects-Pedal-Stomp-Box-GPE182-HSB-9-Volt-UK-power-supply-HSB-UK-/281073236769?pt=UK_Guitar_Accessories&hash=item4171453b21

you will need to cut the wire and swap them about as the Spectrum has a negative internal pol, and a positive external one.

http://s6.postimage.org/tjdgh3prl/Spectrum_Power_Coupler.jpg (http://postimage.org/)

That should help you



@Roy

Nice find on the PSU btw!



@Chinners

Good to see you about here my friend, kinda missed you!

The one in the ebay linky IS center negative...??? or am I just being daft?

@Zetro
Nice to see you're still here! :)

roy_bates
13th March 2013, 16:35
if its a zx spectrum 16k or 48k just get one of these.

http://www.ebay.co.uk/itm/Behringer-Effects-Pedal-Stomp-Box-GPE182-HSB-9-Volt-UK-power-supply-HSB-UK-/281073236769?pt=UK_Guitar_Accessories&hash=item4171453b21

you will need to cut the wire and swap them about as the Spectrum has a negative internal pol, and a positive external one.

http://s6.postimage.org/tjdgh3prl/Spectrum_Power_Coupler.jpg (http://postimage.org/)

That should help you



@Roy

Nice find on the PSU btw!



@Chinners

Good to see you about here my friend, kinda missed you!

The one in the ebay linky IS center negative...??? or am I just being daft?

@Zetro
Nice to see you're still here! :)




the link i posted,the supply will be fine.i think zetro was just pointing out the polarity.:D(it is wired correctly going by the listing)

Zetr0
13th March 2013, 16:41
@Roy / Chinners

Sweet!

I didn't notice the listing stating internal negative pol - sadly I get into a habit of mentioning the polarity every time I read a request for the rubber key power supply plug-pack.


Oh look... in very large letters (Center Tip Negative!)

yeah that about covers it - a good find just became a GREAT FIND!

protek
13th March 2013, 17:05
I've got one of these with my Spectrum +. Allows several voltages and change of polarity by turning the connector around. Also there's different kind of connectors.
http://www.clasohlson.com/fi/Muuntaja-20-W/Pr364219000

Your local Maplins, etc. probably have similar.

subzero
13th March 2013, 17:54
what happens if you plug one in with the wrong polarity?

reason im asking is i tried a 500Ma adaptor at 9v, the speccy buzzed for a bit then went quiet - i havent broke it have i???

Zetr0
13th March 2013, 18:17
Sadly its quite likely you have fried a couple of internal components =(

The 9VDC is internally switched up to +12v and -12v - for the memory (as well as +5 for the 7805) - with the polarity around the wrong way I suspect that it would be enough to damage the internal switching circuit.

It is repairable - as long as you have access and a little experience with a soldering iron.

However, you may of gotten lucky, I suggest you get compatible power supply to try first.

Chinners
13th March 2013, 18:31
Does the adapter you tried have a diagram like either of the below?
41444
(notice the + pointing to the center in the left, and the - in the right)
If it's like the left image, then you may have damaged something, like the right should be ok. If neither then... um....:unsure:

subzero
13th March 2013, 19:09
it doesnt, but i just tried my megadrive adapter which is only 300mA - speccy made a low buzz then i unplugged it - heres hoping i havent killed it!

80sFREAK
13th March 2013, 23:49
Japanese Famicom, SFC and Sega MegaDrive adaptors perfectly fit :thumbsup: They are all DC 9V central negative.

subzero
14th March 2013, 14:38
a friend brought through a spectrum PSU today....


IT WORKS :) 2 keys dont work but the speccy does :) :) :)

Oge
14th March 2013, 15:14
it doesnt, but i just tried my megadrive adapter which is only 300mA - speccy made a low buzz then i unplugged it - heres hoping i havent killed it!
9V@300mA is way distant from the power requirement of a Sega Mega Drive, avoid using it! At least 9V@1000mA if you don't want to ruin both your Power Supply and your Console... :)


Cheers,
Oge

Zetr0
14th March 2013, 16:01
a friend brought through a spectrum PSU today....


IT WORKS :) 2 keys dont work but the speccy does :) :) :)

You sire, are a very lucky man!!

Congratulations on getting this retro-treasure up and running!! - I suspect that you will need a new keyboard membrane - there relatively easy to fit, if a little awkward - you can get spectrum 48k keyboard membranes from rwap services

Rich is a member-trader here on AmiBay, you can also contact him through his site at rwap software (http://www.rwapsoftware.co.uk/membranes.html) he is a very friendly fellow and I am sure he will help you out with your problematic little spectrum.

subzero
15th March 2013, 00:25
thanks to the peeps who offered a PSU, but i now have one, roll on the retro-ness :)