madbeanpedals::forum

Hello

I've been trying to make it work for days now. I've changed all the IC's and transistors. Double checked all the resistors and capacitors values. I'm using 2N5952 transistors matched at 2.22, 2.25, 2.22 and 2.23 v. and all I can get is a weak phasing (almost non existent effect). I do hear the difference in tone when I'm adjusting T2 but when I thought I found the sweet spot there is no phasing.

Help me please  :'(

Input voltage: 7.8V

TL072:

• 4.51
• 4.51
• 4.26
• 0.00
• 7.1
• 0.8 - 3.8
• 3.0 - 4.0
• 3.6 - 4.8

TL704

• 4.52
• 4.58
• 4.58
• 7.0
• 4.58
• 4.59
• 4.65
• 4.52
• 4.59
• 4.59
• 0.00
• 4.59
• 4.59
• 4.66

1N5917

• 4.58
• 4.0
• 2.97

2N5952

• 4.59
• 4.58
• 2.36

Your input voltage is very low. Please try 9v and report back the result.

Finally I found a decent power supply at 9.3 v.

TL072:

• 4.37
• 4.37
• 4.17
• 0.00
• 4.00 - 5.30
• 4.40 - 5.30
• varies
• 8.5

TL704

• 4.57
• 4.95
• 4.96
• 8.51
• 4.96
• 4.96
• 5.27
• 4.65
• 4.96
• 4.95
• 0.00
• 4.96
• 4.96
• 5.2

1N5917

• 4.96
• 4.39
• 3.48

2N5952

• 4.96
• 4.96
• 2.95

Thanks in advance

Your R28 looks like it might be 10K (brown, black, black, red?, brown), not 1M (brown, black, black, yellow, brown).  Don't know if that would cause your problem, but it's the same resistor that is replaced by the Width pot in the JMK Super Phaser.

Quote from: mgwhit on September 29, 2014, 12:38:27 AM
Your R28 looks like it might be 10K (brown, black, black, red?, brown), not 1M (brown, black, black, yellow, brown).  Don't know if that would cause your problem, but it's the same resistor that is replaced by the Width pot in the JMK Super Phaser.

Thank you so much! it is working now! it's alive! :D Just replaced R28 for 1M  as sugested and it is working now.
This is one of the most beautiful sounding pedal that I have ever built.

Cool!  Glad to hear that solved it.  Have fun!