Phase II

[Coda]

I know it's really boring, but did you check every resistor and capacitor? Changed every single Opamp?

Yep. It's a real stumper. I'll figure it out eventually. It'll work when its ready to work...

 

[Guilherme Collateral]

https://www.ti.com/product/TL072/part-details/TL072CP there you go! I recommend to buy right now because they were out of stock for more than 2 months

 

[Guilherme Collateral]

Yep. It's a real stumper. I'll figure it out eventually. It'll work when its ready to work...

I don't know if it is the case, but it's worth a shot, I got a Muzzle PCB with one track without continuity. A small jumper solved the problem... I know it's not that rare because I have this problem with some pcb I buy for my pedal line from time to time

 

[MichaelW]

I said it somewhere here in the forum, but... If you get 100 pcs straight from Texas Instruments it's 55 cents a piece and you'll be 100% sure it's a original chip

That's a crap ton of TL072's for a hobbyist. Maybe we should organize a group buy?

 

[Betty Wont]

That's a crap ton of TL072's for a hobbyist. Maybe we should organize a group buy?

I can easily go through 100+ TL072 in a month. Especially if I'm building a batch of Phase II/DuoPhase. And I concur that the Phasor II is the best phaser out there.

 

[Guilherme Collateral]

That's a crap ton of TL072's for a hobbyist. Maybe we should organize a group buy?

They actually sell less, you can buy 25 pcs, and still less than 1usd a piece.

 

[Guilherme Collateral]

I can easily go through 100+ TL072 in a month. Especially if I'm building a batch of Phase II/DuoPhase. And I concur that the Phasor II is the best phaser out there.

Ditto on that! As I live in Brazil and it's really hard to find good chips here and most electronics stores sell counterfeit chips I usually order 300 - 400 pieces of assorted opamps every 2 - 3 months. They ship VERY quickly and very well packaged

 

[MichaelW]

I like to maintain the illusion that I'm not really building that many pedals (or spending all that money) by only ordering 10 at a time

 

[Route14]

How did you calibrate the trim pots? Any trick to that or just adjust to taste?

 

[Betty Wont]

How did you calibrate the trim pots? Any trick to that or just adjust to taste?

I always leave mine at noon. I've yet to have any need to change them. One controls the overall brightness of the LED and the other the sweep symmetry. But it should be pretty perfect at noons.

 

[Robert]

I adjust them so there is a constant smooth transition from light>dark>light, with no dead spots at full brightness or full darkness.

 

[fig]

I really need to figure out why mine doesn’t work…

R19 pin is awfully close to that LDR, as seen here;

 

[Coda]

R19 pin is awfully close to that LDR, as seen here;

Close, but no cigar…

 

[thabigburrito]

Does anyone know where I could find a PC mount 25k log potentiometer? I got a 20k one but I'm worried about the range of the rate.

 

[Guilherme Collateral]

Does anyone know where I could find a PC mount 25k log potentiometer? I got a 20k one but I'm worried about the range of the rate.

I don't remember where I got mine, but the rate goes CRAZY fast, you'll be fine with 20k

 

[Synchrony Pedalworks]

Does anyone know where I could find a PC mount 25k log potentiometer? I got a 20k one but I'm worried about the range of the rate.

Before this build came online, I literally bought the parts yesterday. I got the 25k log part from SmallBear. Tayda didn’t have it.

I am glad to hear that this is a favorite phaser. I am just waiting for PedalPCB’s next sale so that I can order the board!

 

[jrhevron]

Does anyone know if you can run the Phaser II at 18V? Does it make a difference?