Joyo - JF-35 Pocket Metal

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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Mdx2600
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Post by Mdx2600 »

Dear ForumFolk,
Please find attached internal pictures of Joyo's JF35 Pocket Metal.

The SMD pars are very small, perhaps 4 or 5 mm by 2mm.
I don't have the dexterity to modify this, I don't think.

The diodes are clearly silicon. There are three TI 4558 op amps in there. This combined with a metal housing gives the same amount of self-noise as a Metal Zone.
I find this pedal to be a pleasing tone - it's very cheap, and it sounds great for the price if you want to do some Ride the LIghting/Justice for All riffage.

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Mdx2600
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Post by Mdx2600 »

PMetal-IMG_3398.jpg
General overview of pedal out of it's case.
Last edited by Mdx2600 on 16 Dec 2014, 09:38, edited 1 time in total.

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Mdx2600
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Post by Mdx2600 »

Image of the Diodes
PMetal-IMG_3409.jpg

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Mdx2600
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Post by Mdx2600 »

Shows the op amp and the silicon diodes.

There's more than enough room to add a switch to modify the diode type, but, you'd have to be able to solder onto those microscopic pads.

The pots will desolder easily enough, giving you access.
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PMetal-IMG_3408.jpg

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Mdx2600
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Post by Mdx2600 »

Boring old gutshot.

I've not had any notions as to which pedal this is cloning.

It's got 3 x 4558 op amps.
It appears to have one diode in the power section, and only 2 diodes as part of the main circuit.

There's are a reasonable amount of cops and resistors, which tell me that there is something going on shaping the frequency response between the op amp stages before hitting possibly a final clipping stage (the diodes).

Anyone else got one of these?
Attachments
PMetal-IMG_3400.jpg

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