Lardo buys another zeddy
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Re: Lardo buys another zeddy
Ah the key piece. I knew there would be a correct name for it.
My alignment is chaotic neutral but I guess that is a different story.
Is it possible to buy these parts? Or would I be just as well sacrificing a suitable piece of plastic and some glue?
My alignment is chaotic neutral but I guess that is a different story.
Is it possible to buy these parts? Or would I be just as well sacrificing a suitable piece of plastic and some glue?
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
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Re: Lardo buys another zeddy
Yes, there were (are) official keys from the manufacturers of edge-connector sockets. However, you generally have to buy large packs of them....
So you may want to try the DIY method...
If you have an old cassette case, cut a suitable section of plastic from this, then use a hard plastic glue or superglue to fix it in place.
Or, instead use a section of PCB cut to size. Typically people use SRBP that does not have any copper on it. Again, glue it in place.
Or, find a suitable thin nail, drill a hole through the socket slightly smaller than the diameter of the nail. Then use a soldering iron to push the nail through the plastic connector. Use a mini grinder (Dremel type tool) to cut the unwanted parts of the nail off and grind down the nail until it's flush with the plastic. This method is more popular with ZX Spectrum expansions.
Or, push a suitable spring washer in, best to use glue to hold it in place.
Mark
So you may want to try the DIY method...
If you have an old cassette case, cut a suitable section of plastic from this, then use a hard plastic glue or superglue to fix it in place.
Or, instead use a section of PCB cut to size. Typically people use SRBP that does not have any copper on it. Again, glue it in place.
Or, find a suitable thin nail, drill a hole through the socket slightly smaller than the diameter of the nail. Then use a soldering iron to push the nail through the plastic connector. Use a mini grinder (Dremel type tool) to cut the unwanted parts of the nail off and grind down the nail until it's flush with the plastic. This method is more popular with ZX Spectrum expansions.
Or, push a suitable spring washer in, best to use glue to hold it in place.
Mark
ZX81 Variations
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ZX81 Chip Pin-outs
ZX81 Video Transistor Amp


There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb

Spring approaching...
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Re: Lardo buys another zeddy
Thanks Mark!
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
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Re: Lardo buys another zeddy
Lardo Boffin wrote: ↑Wed Dec 13, 2023 8:46 pm My name is Lardo and it has been over 4 weeks since I last bought a zeddy. Forgive me Sir Clive.

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Re: Lardo buys another zeddy
I got away with just doing 10 ‘Hail Zeddies’.redgatemodels wrote: ↑Thu Dec 14, 2023 9:21 amLardo Boffin wrote: ↑Wed Dec 13, 2023 8:46 pm My name is Lardo and it has been over 4 weeks since I last bought a zeddy. Forgive me Sir Clive.![]()
Interestingly this one has a nice eprom and someone changed the keyboard already!
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
Also put a nice big screw through the board into the bottom case which probably means they've stripped the threads of either of the two pillars supporting the motherboard, can't think of any other reason why they'd do that. 

Last edited by Moggy on Fri Dec 15, 2023 10:08 pm, edited 2 times in total.
???????????????????????????PIINKEY$?????RND????????????????????????????????????????????????????????PI????????
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Re: Lardo buys another zeddy
There was an odd assortment of screws in the case, none of them original.
Luckily they had not done too much damage.
Luckily they had not done too much damage.

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
No doubt Lardo you will work your usual magic on said beast! 
Have to say those TI EPROMs look nice.

Have to say those TI EPROMs look nice.
???????????????????????????PIINKEY$?????RND????????????????????????????????????????????????????????PI????????
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Re: Lardo buys another zeddy
They do look cool!
Just had another one arrive. This has a mystery composite mod and produces a very nice picture. Will open it up later and see what they have done. Keyboard needs attention.
Just had another one arrive. This has a mystery composite mod and produces a very nice picture. Will open it up later and see what they have done. Keyboard needs attention.
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
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- Posts: 2256
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
And here is the composite mod:
Not sure I like where the cables go. All that heat…
A bit closer:
And the solder side:
The rest of the PCB:
Not sure I like where the cables go. All that heat…
A bit closer:
And the solder side:
The rest of the PCB:
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