Hello all! I'm working on my first (hopefully first of at least 2...) Lola build, and thankfully I stopped to do testing before moving to the meter PCB, as I've hit a snag.
Problem:
DI works fine, but when using a mic I get no sound from the mic itself; instead I get some really wicked noise as I turn the gain up. There doesn't seem to be a difference with phantom power engaged or not. I've exported a quick recording of the noise in case it might be helpful in pinpointing the root issue here: https://soundcloud.com/wazatron/lola-test/s-yIxUj
Troubleshooting (so far):
I've looked through the board here as well as the Lola troubleshooting doc on the Hairball Audio site and have begun stepping through what I see as the most likely issues.
[list type=decimal]
[*]I've checked the DI connection and its solder joints
[*]Checked solder joints overall, reflowed anything that looked less than great
[*]I've started checking resistors, but I did check all with a DMM and organized them with the handy print-out guides from the site, so hopefully I didn't screw that up
[/list]
Unfortunately I don't have a lot of testing equipment. The only things I have are my lunchbox itself and a DMM. Most of my building experience has been with pedals, so I've done quite a bit of soldering and wiring, but nothing (until now) more complicated. But I believe all my joint and wiring look good.
Any thoughts, especially with the sound I'm getting (you can hear the noise generating from the unit increase and decrease as I alter the gain) would be appreciated!
Oh also one random question: the post on the output attenuator is REALLY long, so much so that the knob can't sit flush against the front panel and sticks out further than the knob for the Gain switch. Is this by design with the most updated kits?
Thanks everyone!
