ZX81 pulse cleaner article

Discussions about Sinclair ZX80 and ZX81 Hardware
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Daeve
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ZX81 pulse cleaner article

Post by Daeve »

Got a couple of old magazines - Elektor Electronics. These have articles about cleaning up the tape loading/saving and plans for a circuit.

I think it’s a bit like the Scrubber Dubber?
viewtopic.php?t=1211

Anyways, you’ve probably seen it or know the details, but I couldn’t find anything using search so here they are:

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XavSnap
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Re: ZX81 pulse cleaner article

Post by XavSnap »

French article from Elektor.
(Zx81 Signal cleaner)
(English release: https://archive.org/stream/ElektorMagaz ... 1/mode/2up )

peaufineur impulsions zx81_1.jpg
peaufineur impulsions zx81_2.jpg
peaufineur impulsions zx81_3.jpg
Last edited by XavSnap on Sun Mar 17, 2019 9:25 pm, edited 2 times in total.
Xavier

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XavSnap
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Re: ZX81 pulse cleaner article

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Last edited by XavSnap on Sun Mar 17, 2019 9:23 pm, edited 1 time in total.
Xavier

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XavSnap
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Re: ZX81 pulse cleaner article

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Xavier

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zx81jens
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Re: ZX81 pulse cleaner article

Post by zx81jens »

And the german release:

http://www.8bit-wiki.de/index.php?id=3& ... f39c0e0000

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Jens
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paul ron
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Re: ZX81 pulse cleaner article

Post by paul ron »

Very interesting magazine. I always enjoy the circuits. The direct modem hookup project was an interesting read.

What we did back before modems to transfer programs was hook the OUT jack to an audio transformer which was wired into the telephone speaker mic. On the other end, the recipient would have his phone wired to the audio transformer to the receiver ear piece n the IN jack of the Timex.

We would set the computers to SAVE code n the other end would be waiting to LOAD code. It would transfer as if it were running through a cassette player.

Didn't get any simpler.
The more you say the less people hear.

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