Toastrack power supply???

Its1982again
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Joined: Tue Aug 04, 2020 6:26 pm

Toastrack power supply???

Post by Its1982again »

Hi guys. I've just picked up (be here next week) a bare Spectrum Toastrack. Not tested but that's no isuue as I'll probably have it refurbed. My question is, does the original 48k PSU work with these (I have three!) or is it a specific one? If so, what's the ideal replacement to get if anyone knows? Cheers for the help.

Dave
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1024MAK
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Re: Toastrack power supply???

Post by 1024MAK »

Yes, there is a specific PSU, but it will work for testing purposes with a UK1400 PSU as used with 48K/+ ZX Spectrum machines.

Watch this video.

Mark
Lardo Boffin
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Re: Toastrack power supply???

Post by Lardo Boffin »

ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Toastrack
Its1982again
Posts: 13
Joined: Tue Aug 04, 2020 6:26 pm

Re: Toastrack power supply???

Post by Its1982again »

Cheers guys. Just wasn't sure the 48k one would be ok on longer sessions. Is it same spec, I know it doesn't 'match' the machine but I'll live with that for now.
Lardo Boffin
Posts: 1375
Joined: Sat Nov 26, 2016 2:42 am

Re: Toastrack power supply???

Post by Lardo Boffin »

I think the official toastrack PSU has a higher Amp output - 1.8 vs 1.4.
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Toastrack
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1024MAK
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Joined: Mon Sep 26, 2011 10:56 am
Location: Looking forward to summer in Somerset, UK...

Re: Toastrack power supply???

Post by 1024MAK »

Sinclair ZX Spectrum Power Supply Specifications

ZX Spectrum 16K / 48K / +, UK1400:
* Input: 240V AC, 50Hz 0.11A
* Output: 9V (nominal) DC 1.4A
* Output polarity: outside is positive (+), inside is negative (-)(inner diameter is 2.1mm)

ZX Spectrum 128K:
* Input: 240V AC, 50Hz
* Output: 9V (nominal) DC 1.85A
* Output polarity: outside is positive (+), inside is negative (-)(inner diameter is 2.1mm)

ZX Spectrum +2:
* Input: 220V to 240V AC, 50Hz
* Output: 9V (nominal) DC 2.1A
* Output polarity: outside is positive (+), inside is negative (-)(inner diameter is 2.1mm)

Mark
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1024MAK
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Location: Looking forward to summer in Somerset, UK...

Re: Toastrack power supply???

Post by 1024MAK »

I should add that the ZX Spectrum 128K (toastrack) consumes about 960mA if there are no expansions fitted. This is under the 1.4A maximum that a UK1400 PSU is rated for. So although not recommended, it is possible to use a UK1400 to power a ZX Spectrum 128K. You just have to be very careful if you intend to use any expansions or interfaces.

Mark
Its1982again
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Re: Toastrack power supply??? Now I'm confused!

Post by Its1982again »

Thanks for all the replies. ๐Ÿ‘ Now I use a DivMMc future on my 48k so I'll be using that on the toastie as well. Should I get an adaptor with more than 1.4A or less than 1.4A? Or is the 48k PSU good to go? Seems to be mixed messges here, or I'm confused! ๐Ÿ˜‚๐Ÿ˜‚๐Ÿ˜‚ By the way I've tested it today and I'm getting a garbage display thru SCART but great sound, nothing brilliant on RF either picture or sound, but loading works thru PlayZX 100%, and amazingly every key works! I expected this as it's been hid away for years on end and I'll be sending itnawaynfor refurb/repair.
Lardo Boffin
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Joined: Sat Nov 26, 2016 2:42 am

Re: Toastrack power supply???

Post by Lardo Boffin »

I use the one from my link above, a modern one which I think has 1.5A output. I have run it for many hours with a DIVMMCFuture plugged in without it getting warm so I guess its fine.

I would not personally go with less than 1.5A. Sinclair were not given to spending money unnecessarily so if they put an 1.85A PSU in the box it was for a reason. :D

If you are in the UK Mutant Caterpillar Games refurb / repair these (Iโ€™m sure others do as well but thats who I use).
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Toastrack
Its1982again
Posts: 13
Joined: Tue Aug 04, 2020 6:26 pm

Re: Toastrack power supply???

Post by Its1982again »

Cheers. I'll get one ordered. Only got given a bare unit so this and SCART lead are necessary. Mutanat did one of my ZX81's and I got my DivMMc from them so that's where it'll be going. Brilliant service, and a bar of chocolate! If you know, you know! ๐Ÿ˜‚๐Ÿ˜‚๐Ÿ˜‚
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