The SPD1 connection to the PCB was faulty. The PCB was actually damaged, probably during the build. I patched from the SPD1 link to downstream resistor and violla~. Solved. Vibing like a rock star now.
- Welcome to madbeanpedals::forum.
This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.
Pages1
#1
Tech Help - Projects Page / Re: Harbinger One - Lamp oscillates several cycles then is steady
March 19, 2017, 02:57:23 AM #2
Tech Help - Projects Page / Re: Madbean Harbinger Noise Issue
March 19, 2017, 02:54:19 AM
I'm getting similar, corresponding to pulsing of lamp. Is this similar to what you experienced and did you overcome this? sb
#3
Tech Help - Projects Page / Re: Harbinger One - Lamp oscillates several cycles then is steady
March 11, 2017, 07:15:51 PM
The number of cycles varies by the INT (intensity) pot. lower intensity yields 10-11 cycles regardless of SPD1/2. Higher intensity yields 1 cycle at highest setting.
#4
Tech Help - Projects Page / Harbinger One - Lamp oscillates several cycles then is steady
March 10, 2017, 06:35:20 AM
Troubleshooting Harbinger One - 2015, 9v power variant (D1 removed). lamp executes several cycles then slowly dims to a steady neutral glow (~9v). I've completely rebuilt the whole sub-circuit for the lamp and re-tested voltages, resistors, capacitors, transistors, and SPD1/2 for proper values. Gain/Depth seem to work as does SPD. If I manually ground Q11 base, lamp cycling starts over only to settle to steady glow. So it would seem to be upstream issue with C23-C25. Voltages hold steady from power circuit so am getting enough voltage. Any ideas?
Pages1