jrbell1990
New member
Greetings all,
I am having trouble finding the source of my issue on this Integral Preamp and was hoping for some insight (maybe from someone who's built this as well??).
Solder-Side
Audio is at about half and sounds like a zipper powered by battery and 9V supply. Q1 seems to be playing a part in this as signal drops entirely when probed on Base and Collector.
Other notes:
I appreciate any and all help!
I am having trouble finding the source of my issue on this Integral Preamp and was hoping for some insight (maybe from someone who's built this as well??).
Solder-Side
Audio is at about half and sounds like a zipper powered by battery and 9V supply. Q1 seems to be playing a part in this as signal drops entirely when probed on Base and Collector.
Other notes:
- Subbed 1n4148 for the 1s1588 diodes per recommendation.
- Used the recommended 35V capacitor values.
- I have used (and substituted) known-good TL072CP and TC1044SCEPA chips.
- Q1 and Q2 are BC548C per recommendation and measure appropriately prior to soldering on to the board.
- R4-6M8 resistor is 4M7 and 2M2 wired in series.
- I have reflowed all connections at the jacks, grounds, and switch.
I appreciate any and all help!