Debugging Solderman's Big Wave (Miniature John Hollis Ultra Flanger)

[Trippy Demon]

Hi there,

I'm trying to debug Solderman's Big Wave flanger from this ancient topic Worlds smallest flangers

I've built it on this pdf-1 closely based on the R.G. Keen version of the John Hollis Ultra Flanger pdf-2 and have gone over the pcb paths several times to make sure no solder or path is touching another path

I have a tremolo sound that can be adjusted with the Sweep pot
The Manual pot only makes the pedal work if turned to the far left
Depth makes the tremolo tick as turned to the far right, turning back to left first the effect disappears then it comes back without ticking and slowly turns off to the far left
Regen has a faint effect
I've turned the V3 so that it's Bias is ± 3,8V (it is in the working range as I can hear) as biassed slightly lower the manual pot get's it working point a little towards the right
the odd/even switch only makes a difference if the Depth pot is not to the far right and then the V1 and V2 can be adjusted to make the tremolo effect appear and disappear

So here are the measurements with a Battery at 8,86 Volts

IC1 - TLO72
1: 4,41
2: 4,44
3: 4,37
4: 0,00
5: 3,94
6: 4,35
7: 4,43
8: 8,08

IC2 - MN3007
1: 8,09
2: 3,97
3: 4,40
4: 0,00
5: 0,00
6: 4,04
7: 3,95
8: 3,97

IC3 - 4049
1: 8,07
2: 3,96
3: 4,06
4: 3,97
5: 4,05
6: 3,96
7: 4,06
8: 0,00
9: 4,02
10: 4,04
11: 4,03
12: 4,03
13: 0,00
14: 4,03
15: 4,03
16: 0,00

IC4 - 4046
1: 0,00
2: 4,05
3: 4,01
4: 4,02
5: 0,00
6: 1,29
7: 1,27
8: 0,00
9: 0,90 - 1,02
10: 0,17 - 0,27
11: 0,00
12: 6,40 - 6,47
13: 0,00
14: 8,01
15: 0,01
16: 8,01

IC5 - TLO72
1: 1,29 - 7,52
2: 3,30 - 3,70
3: 1,50 - 5,30
4: 0,00
5: 3,28- 3,70
6: 3,65
7: 1,50 - 4,50
8: 8,11

Although it's quite an old topic I hope someone can steer me into the right direction...

Cheers, Tjø

[greaser_au]

hollis. wave. solder....    mwahahahaha!!!!    only an electronics factory veteran would get why this is poignant!

sorry to hijack your thread!

david