Print Page - Total Recall working except modulation

Title: Total Recall working except modulation
Post by: lwatford on April 12, 2019, 05:49:03 PM

Just finished a Total Recall, and the delay is working and sounds great. The modulation knob isn't introducing any modulation.

Voltages on IC9 are
-5.25-9.00
-7.17
-7.04-.09
-14.98
-7.17
-7.16
-7.05-.09
0

I get a nice sharp Triangle wave at Pin 7, and pin 2 on the Mod pot when it's all the way up. I can hear the delay time change when I move the mod pot. I've swapped IC9, reflowed everything around the modulation/clock section.

Any thoughts? Maybe I'm missing something easy?

(https://i.imgur.com/923srOA.jpg)

(https://i.imgur.com/d9KoSRq.jpg)

(https://i.imgur.com/A8364Qc.jpg)

(https://i.imgur.com/zkJzcFl.jpg)

Title: Re: Total Recall working except modulation
Post by: lwatford on April 12, 2019, 11:59:00 PM

Think I see it...

Title: Re: Total Recall working except modulation
Post by: lwatford on April 13, 2019, 03:33:18 AM

Rookie mistake...wrong value resistor. Works great now.

madbeanpedals::forum

Projects => Tech Help - Projects Page => Topic started by: lwatford on April 12, 2019, 05:49:03 PM