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Author Topic: Something about the coil (Read 443 times)

Offline pear

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Something about the coil
« on: 2018.May.22. 17:58:09 »
Something touched me today to compare the inverter circuits in the ZX Spectrum and Enterprise.
You could say "Find the differences" :)
I managed to recreate the coil to ZX Spectrum with full success (see the picture).
I have an undamaged coil from disassembly to the EPower module.
When I find some free time I will measure its, unroll and count the scrolls.

Online Zozosoft

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Re: Something about the coil
« Reply #1 on: 2018.May.22. 19:00:24 »
Good idea!
I already noticed it, collected the Spectrum variations here. But it is remain unfinished brainstorming :oops:

Offline pear

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Re: Something about the coil
« Reply #2 on: 2018.June.05. 19:56:36 »
The windings are wound in wire in enamel with a diameter of 0.25 mm.
The primary winding (legs 1-2) is wound on the core first and consists of 12 windings.
Secondary winding (external, legs 3-4) has 60 windings.
In fact, the beginnings of the windings are on legs 2 and 4.
Both windings are wound in a clockwise direction and they ends are, respectively, on legs 1 and 3.
Unfortunately, I was unable to measure the inductance. I do not have a sufficiently accurate measurements (range of micro Henr).
« Last Edit: 2018.June.05. 20:06:43 by pear »

Online Zozosoft

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Re: Something about the coil
« Reply #3 on: 2018.June.09. 14:25:14 »
The Spectrum coil are similar?

Offline pear

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Re: Something about the coil
« Reply #4 on: 2018.June.09. 16:49:04 »
The ZX Spectrum  has a coil with transformer gear 1:3. In EP is 1:5.
Apart from this difference, it is very similar.