chongmagic
Well-known member
Removed R100 and solder bridged it and it sounds great.
Circulator "Saturn Phaser"
- Thread starter chongmagic
- Start date
Chuck D. Bones
Circuit Wizard
Nice build! Why did you remove R100?
chongmagic
Well-known member
It was causing the green LED on the bicolor LED not to illuminate. But now the effect is not working it seems. The knobs control the phaser but only if they are moved manually. I am going to have to troubleshoot it. It worked fine before I messed with R100 but that is probably a coincidence.
Chuck D. Bones
Circuit Wizard
Not a coincidence. If you replaced R100 with a jumper, then the green LED is loading down the LFO and causing it to not work. Mr. PedalPCB said in another thread that the LFO does not have the capability to drive some 2-color LEDs.
Jovi Bon Kenobi
Well-known member
What you described is what the middle function of the 3 position toggle does. It "parks" the frequency so you can manually sweep the phase, dialing in the cocked wah sound. By chance, was it in that position when you tested it?
Last edited:
chongmagic
Well-known member
No this occurred in all positions.
benny_profane
Well-known member
chongmagic
Well-known member
This LED is common anode I believe, I got some from GuitarPCB a while back. I will replace R100 and just deal with one color.
Hey I’m curious to know if you’ve compared the phaser in this one to the duo phase you built.
I’d like to build either the circulator or phase ii soon but haven’t heard from anyone who’s owned or built both.
here’s my impressions just from research.
Pros for eqd:
-can really dial in the sound you want with the extra knobs.
-vibe mode is cool, though not quite the same as a photon vibe type pedal
-no trimmers or ldrs to mess with
Pros for mutron
-vintage circuit = cool
-maybe the base tone is better/cooler than the eqd even if you don’t have all the controls of the eqd
let me know what you think after if you get a chance to compare them. Thanks
I’d like to build either the circulator or phase ii soon but haven’t heard from anyone who’s owned or built both.
here’s my impressions just from research.
Pros for eqd:
-can really dial in the sound you want with the extra knobs.
-vibe mode is cool, though not quite the same as a photon vibe type pedal
-no trimmers or ldrs to mess with
Pros for mutron
-vintage circuit = cool
-maybe the base tone is better/cooler than the eqd even if you don’t have all the controls of the eqd
let me know what you think after if you get a chance to compare them. Thanks
chongmagic
Well-known member
The Duo Phase is more vibe like to me than phaser even though you can get that sound out of it.
chongmagic
Well-known member
Did you use 1k for R100?
benny_profane
Well-known member
I used 1k for both R33 and R100 with the LED in the link.
Chuck D. Bones
Circuit Wizard
If the LEDs try to draw more current than the LFO can supply, then the LFO output sags and the LFO stops. The amount of current that the output can deliver depends on the RATE pot setting. Maximum LED current draw depends on R33, R100 and the two LED's Vf. If the resistors are made large enough, then the LFO won't freeze. Except when the RATE switch is in the middle position and it's supposed to freeze.
EQD only drives one LED, the little red one next to the RATE knob, with the LFO.
chongmagic
Well-known member
I am going to try 1k in R100 and see if that helps, I may try 1k in R33 as well.
Chuck D. Bones
Circuit Wizard
You may need to go bigger than that.
chongmagic
Well-known member
I had 4k7 initially when it was working
Chuck D. Bones
Circuit Wizard
So you want to end up somewhere in-between 1K & 4.7K. Make sure it works over the full range of the RATE pot.
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