Dirk_Hendrik wrote:Start naggin me throug mail tomorrow Rogier. I've got some PCB layout files you definitely want
So the script version and the later ones ARE different!!
Got one in for repair and traced it! Main differences are the clean mixing circuit, some small resistor changes in the LFO and the resistor value in the Vref
blackbunny wrote:So the script version and the later ones ARE different!!
Got one in for repair and traced it! Main differences are the clean mixing circuit, some small resistor changes in the LFO and the resistor value in the Vref
Is this traced from a script Phase 100? The one with the "tropical fish" coloured capacitors?
zaphod wrote:Looking at the schematic, I really don't get why there are four extra stages which aren't modulated by the LFO, as these will not contribute anything to the phasing effect. I even wonder if they did it pourely as a marketing gimmik, to advertose it as a 10-stage phaser, when in reality it's only a six-stage.
armdnrdy1 wrote:zaphod wrote:Looking at the schematic, I really don't get why there are four extra stages which aren't modulated by the LFO, as these will not contribute anything to the phasing effect. I even wonder if they did it pourely as a marketing gimmik, to advertose it as a 10-stage phaser, when in reality it's only a six-stage.
The Phase 100 is a 10 stage phaser.
Pedal manufacturers are not in the market to include components in their designs that serve no purpose.
The stages you are referring to are "fixed" stages. Fixed stages do contribute to the overall phasing effect.
This is not an uncommon design.
The ADA Final Phase has 6 swept stages and two fixed stages.
It turns out that the human ear is not too sensitive to phase shifts...
The most common commercial phase shifters stop with four stages (such as the MXR Phase 90, Univibe) or six stages (MXR phase 100).
...although the effect is noticeable, it's much better if the notches move up and down in frequency.
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