Aquaboy volume drop

[coi2001]

There is a general volume drop (dry signal and repeats) in my build (v3205). Is this expected, if not, what can I do to increase the volume to unity
thank you
Costantino

[gtr2]

How much would you say it drops?  Does it drop with the mix fully counterclockwise?

Josh

[coi2001]

Josh: thank you for your reply. The volume level is lower than unity even with the mix pot maxed out. It's a bit like abfackeln's bad stone board without the lpb at the end, if you know what I mean. Everything else works fine. I put a trimpot instead of the feedback resistor and I can dial just the right amount of feedback. The v3205 is getting 7.8V (lowered R19 to 1K). There is what I think is an acceptable level of distortion on the repeats. The unit is pretty quiet with minimal noise. The volume drop became obvious once I compared it side by side with the Memory Man and the Echobase. I do not want to mess with it if is a well known characteristic of this pedal.
Regards
costantino

[madbean]

You can decrease R33 and R36 to 15-22k for some added output. This is the least likely place for it to impact the character of the pedal.

[coi2001]

Brian: thank you, I'll give it a shot. One more thing, VD drops by about 1V when the mix pot is maxed out (from 7.8 to 6.9 in my case), is that OK?
thanks
Costantino

[madbean]

That should not happen. This might explain the volume loss. Mine does not have a noticeable volume drop when engaged.

You need to find out why Vd is dropping! Vd supplies only the Clock and BBD. The compander and i/o stuff comes off the 9v rail.

[coi2001]

Brian: thank you, I'll check the relevant parst of the circuit before changing resistors.
Best
Costantino

[coi2001]

Brian, by the way, any pointers would be greatly appreciated
Thanks again
Costantino

[coi2001]

Found what the problem was, R37 150K instead of 150R! The audioprobe saved the day yet again!
Thanks to you all
Costantino

[madbean]

Awesome!