Hi all, a little help please! I just "built" my first rev D, and by built I mean I ran into a problem.
I finished the whole thing and got to the calibration steps. Q Bias was fine, discrete meter circuit I also guess was fine, but the GR tracking was not working. It seems my unit is not compressing and/or the VU meter isn't responding to the attack being engaged. I followed all the troubleshooting steps after hearing back from Mike and figured I would post here to not just bother him, haha.
Anyways, here are all my voltage readings:
https://docs.google.com/document/d/13zXCI9Jio-xdexQ3Kz8hQPpoDCK2VHI_Ln7QtSpz0bE/edit?usp=sharingI noticed some voltages weren't low, but in fact high. The brown wire reading, for example is supposed to be 3.07vac but I was coming in at over double that.
In the GR Control Amp Input you will notice two numbers, I was consistently getting one or the other which was strange, so I put them both. Q8 is where the readings really start to dip and everything after that is low so I'm assuming my problem is in the GR Control Amp.
I'm currently out of town but want to tackle this when I get back as I have another rev D I need to put together so I can clean out my workspace but want to set this one up properly before moving on. I'm assuming the first thing to try is check my joint at Q8 and possibly just redo that, but is there anything else I need to check as well, or is there anything else I should try in case that doesn't work?
Sorry if this is a bit of a general question, I'm a little bit of a noob when it comes to following schematics (I can read simpler ones fine) although I've put together a decent amount of DIY projects before, so I'm not sure where to start with something much larger like this.
Thanks in advance!