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Posted: Sat Aug 23, 2008 4:17 pm
by Bacchus
Cool. I think I like the top left, or the bottom left, although the bottom right will probably be easiest to hide a knob in the middle of.

Posted: Sat Aug 23, 2008 4:43 pm
by euan
Top left, then bottom left.

Posted: Sat Aug 23, 2008 8:21 pm
by Sparky
Top left fo'sho.

And back to relevancy; I'd really like to get a hold of this pedal. Maybe if I sold my EHX Electric Mistress, Small Clone and my OC-2 I could afford one. Nah, I'm okay. I think building a phaser from a kit would be more rewarding than dropping the $$ for a relic'd box...

Posted: Sat Aug 23, 2008 8:22 pm
by Mike
I haven't looked into phasers yet, but I imagine it means at least 3 ICs.

Posted: Sat Aug 23, 2008 8:28 pm
by Sparky
Mike wrote:I haven't looked into phasers yet, but I imagine it means at least 3 ICs.
http://www.buildyourownclone.com/phaser.html

Looks like a script logo MXR Phase 90 clone. If I had the cash I'd pick that kit up and build it.

Posted: Sat Aug 23, 2008 8:31 pm
by Mike
I'm sure it is. Looks like six ICs.

Fuck knows how they work. I had to look phasers up when I was writing the Effects page of the wiki and I'm still confused. I just copied it verbatim.

Posted: Sun Aug 24, 2008 2:59 am
by Will
Phasers use a high-pass capacitor combined with a resistor to emphasize a given frequency, determined by the resistance. The resistance is constantly changed by the JFETs and LFO IC, hence the emphasis is swept up and down. Functionally, it's similar to turning your tone control up and down.
The Phase part comes into play because each of these resistor/capacitor networks is hooked into the inverting input of an OpAmp, which flips the signal's polarity 180 degrees. This usually happens 4 times (in the case of a Phase 90 or SS). Since a Mono device cannot push and pull the signal at the same frequency simultaneously, the frequencies which each stage had in common with the one preceding it are canceled out inversely proportional to their amplitude. Hence, the emphasized frequencies become notches.
Basically the chain is: Buffer-Filter-Mod-Flip-Filter-Mod-Flip-Filter-Mod-Flip-Filter-Mod-Flip-Buffer-Blend-Out
Finally, a bit of uneffected signal is blended back in to make the effect more subtle.

Posted: Sun Aug 24, 2008 4:15 am
by Sparky
DuoSonicBoy wrote:Phasers use a high-pass capacitor combined with a resistor to emphasize a given frequency, determined by the resistance. The resistance is constantly changed by the JFETs and LFO IC, hence the emphasis is swept up and down. Functionally, it's similar to turning your tone control up and down.
The Phase part comes into play because each of these resistor/capacitor networks is hooked into the inverting input of an OpAmp, which flips the signal's polarity 180 degrees. This usually happens 4 times (in the case of a Phase 90 or SS). Since a Mono device cannot push and pull the signal at the same frequency simultaneously, the frequencies which each stage had in common with the one preceding it are canceled out inversely proportional to their amplitude. Hence, the emphasized frequencies become notches.
Basically the chain is: Buffer-Filter-Mod-Flip-Filter-Mod-Flip-Filter-Mod-Flip-Filter-Mod-Flip-Buffer-Blend-Out
Finally, a bit of uneffected signal is blended back in to make the effect more subtle.
Holy fuck, what?

Posted: Sun Aug 24, 2008 5:16 am
by jcyphe
Mike wrote:
jcyphe wrote:I see some on ebay. Does anybody know the part name for these on Mouser

Image
Check out tehse guys:
http://www.futurlec.com/PotSliding.shtml

Insanely cheap. Their regular pots are Alphas and sell for $0,50.

Totally recommend them. Are you making a Harmonic Perculator?
No, thanks for the link Mike.

Posted: Sun Aug 24, 2008 6:56 am
by Will
Sparky wrote:
DuoSonicBoy wrote:Phasers use a high-pass capacitor combined with a resistor to emphasize a given frequency, determined by the resistance. The resistance is constantly changed by the JFETs and LFO IC, hence the emphasis is swept up and down. Functionally, it's similar to turning your tone control up and down.
The Phase part comes into play because each of these resistor/capacitor networks is hooked into the inverting input of an OpAmp, which flips the signal's polarity 180 degrees. This usually happens 4 times (in the case of a Phase 90 or SS). Since a Mono device cannot push and pull the signal at the same frequency simultaneously, the frequencies which each stage had in common with the one preceding it are canceled out inversely proportional to their amplitude. Hence, the emphasized frequencies become notches.
Basically the chain is: Buffer-Filter-Mod-Flip-Filter-Mod-Flip-Filter-Mod-Flip-Filter-Mod-Flip-Buffer-Blend-Out
Finally, a bit of uneffected signal is blended back in to make the effect more subtle.
Holy fuck, what?
SCIENCE

Posted: Sun Aug 24, 2008 8:25 am
by Mike
Actually I think teh original signal is blended back to make the effect audible rather than subtle.

Posted: Sun Aug 24, 2008 10:48 pm
by Will
Mike wrote:Actually I think teh original signal is blended back to make the effect audible rather than subtle.
Yes - 2AM post is inaccurate. It's blended back in with an out-of-phase signal produced by the effect section, causing the corner frequencies to be canceled out. If you disconnect the clean blend, you get a vibrato effect.

Posted: Mon Aug 25, 2008 6:43 am
by MattK
BacchusPaul wrote:... the bottom right will probably be easiest to hide a knob in the middle of.
You what?

Posted: Tue Aug 26, 2008 5:50 pm
by Bacchus
Have you read the thread?

Posted: Tue Aug 26, 2008 5:54 pm
by More Cowbell
Can aen or mike make a copy of this pedal but call it "flying poo" with a pic of a monkey instead of a bug with wings?

if so...How much?

Do it.

Posted: Tue Aug 26, 2008 6:13 pm
by Sublimedo
More Cowbell wrote:Can aen or mike make a copy of this pedal but call it "flying poo" with a pic of a monkey instead of a bug with wings?
YES!!! DO WANT!

Posted: Tue Aug 26, 2008 6:17 pm
by More Cowbell
Can I cry and whine for a discount or complimentary 1st pedal?

Posted: Tue Aug 26, 2008 6:28 pm
by Sublimedo
If I had my own fully running mega pedal production company I'd give old school shortscalers free shit all the time. But alas, I'm just a slacker.

Posted: Tue Aug 26, 2008 9:06 pm
by arcadedave
In other Ibanez pedal news,

[youtube][/youtube]

"You're a wanker Vai," "So they say."