I’m waiting for them come back into stock as well.Lardo Boffin wrote: ↑Tue Feb 07, 2023 5:03 pm Might be a while before I do anything with this one though as I seem to have run Ginger Electronics out of keyboards…
Lardo buys another zeddy
Re: Lardo buys another zeddy
ZX81 (purchased November 1982), my first computer.
ZXpand+, ZX8-CCB.
ZXpand+, ZX8-CCB.
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1024MAK
- Posts: 4545
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: Lardo buys another zeddy
Well, don’t let Lardo get in first… Or you may wait for even longerrmbrowngr wrote: ↑Tue Feb 07, 2023 9:40 pmI’m waiting for them come back into stock as well.Lardo Boffin wrote: ↑Tue Feb 07, 2023 5:03 pm Might be a while before I do anything with this one though as I seem to have run Ginger Electronics out of keyboards…
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
We have now entered the Spring system. Standby alert! Summer approaching
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
We have now entered the Spring system. Standby alert! Summer approaching
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb.
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Lardo Boffin
- Posts: 1961
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
True, there will only be 50 of them…
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Re: Lardo buys another zeddy
ZX8-KDLX - 50 pieces from 15.02.2023 !!!
Have to be quick next week
Have to be quick next week
ZX81 (purchased November 1982), my first computer.
ZXpand+, ZX8-CCB.
ZXpand+, ZX8-CCB.
Re: Lardo buys another zeddy
ZX8-KDLX ordered!! There were a few left
ZX81 (purchased November 1982), my first computer.
ZXpand+, ZX8-CCB.
ZXpand+, ZX8-CCB.
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Lardo Boffin
- Posts: 1961
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
A superb working issue one and RAM pack. The RAM PACK was working when it arrived but died after half an hour of soak testing. Hey ho.
Check out the logo. Almost perfect.
Clearly been repaired at some point:
Check out the logo. Almost perfect.
Clearly been repaired at some point:
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Re: Lardo buys another zeddy
Lardo the RAM Killer 
In theory, there is no difference between theory and practice. But, in practice, there is.
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Lardo Boffin
- Posts: 1961
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
I didn’t mean to honest! I was just soak testing it before re-homing it.
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Re: Lardo buys another zeddy
Before trying out I do the following tests:
First I measure the voltage of the original PSU.
If it out of range in the DC-Mode => don't use it.
If it shows something in AC mode => don't use it.
The zeddy normally needs no recap so just test it.
If it works but doesn't startup reliable (needs more than one try occasionally) => recap it.
Then to the 16K RAMPacks
They create the voltages required by heavy use of electrolyte Capacitors. One voltage wrong kills the dynamic RAMs.
So never try it without recap first! It's lethal!
First I measure the voltage of the original PSU.
If it out of range in the DC-Mode => don't use it.
If it shows something in AC mode => don't use it.
The zeddy normally needs no recap so just test it.
If it works but doesn't startup reliable (needs more than one try occasionally) => recap it.
Then to the 16K RAMPacks
They create the voltages required by heavy use of electrolyte Capacitors. One voltage wrong kills the dynamic RAMs.
So never try it without recap first! It's lethal!
In theory, there is no difference between theory and practice. But, in practice, there is.
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Lardo Boffin
- Posts: 1961
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
Thanks!
I was trying it on my zeddy with a good PSU, so I guess it was the caps inside the RAM pack.
Lesson learnt!
If I recap it and socket the RAM I can presumably work out which one(s) are dead and fix it?
I was trying it on my zeddy with a good PSU, so I guess it was the caps inside the RAM pack.
Lesson learnt!
If I recap it and socket the RAM I can presumably work out which one(s) are dead and fix it?
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA