Harbinger One - Constant plop plop plop...

[spoontex]

I've just finished the build of the Harbinger One, but I think they don't sound correctly... it don't have Deep ( or gain ? ) and I can hear a constat "plop plop plop" when the effect is on, which goes to rhythm with the speed potentiometer . This is the voltaje list... You can help me to check it?!?! thanks!!


I've change Q13 for an MPSA13

https://soundcloud.com/david-rotger-florit/univibe

[spoontex]

IC1 ( reading correction )

1 1.369
2 4.85
3 0
4 0.007
5 0
6 2.548
7 1.43
8 9.16

[Axeman]

Why did you change Q13?

[spoontex]

I've changed Q13 because the instructions say:

You can obtain the virtually identical tones between the different power options, as far as I can tell. I did find that the maximum brightness of the lamp was a bit lower when using the 9v/charge pump option. For this reason I suggest socketing Q13 and subbing a Darlington transistor there if you have trouble getting the intensity you want from the lamp. An MPSA13 will work fine (this is not listed on the BOM). I did not find this to be necessary, but it is an option.

Do you think Q13 MPS13 is the problem??

[Axeman]

I'm also having a problem with my build, just asking.