Madbean GLAM 5.7v/6.7v daughterboard

[MAO]

Based on the following info posted on the main site by Sean Caskey, I added this daughterboard to give an additional 0.7v supply to the PT2399.

If you use a 78L05 with the daughterboard, output will be a stable 5.7v.  78L06 will give 6.7v.

I found 5.7v seems to be the sweet spot, the chorus is tightened up a bit and still has it's shimmer.

This slight voltage bump isn't going to turn the Glam into a CE2, but I do think it sounds better. Thanks Sean!

6.7v seemed to darken the tone and dampen the depth a bit. I'm wondering if tweaking some of the other components would bring back the shimmer at the higher voltage.  I was going to noodle around with C4, R18 and C10 to see what they do, but haven't gotten to it.

Let me know if anyone has other ideas.  

From Sean Caskey:

Found this info: Delay times for pt2399

with pin 6 grounded,
5V supply = 24ms
6V = 18ms
6.5V = 16.5ms
7V = 15ms
7.5V = 14ms
8.5V = dead chip


You'll need a 1N4001, an LED, and a 1k resistor.  I used 22 gauge wire to create standoffs through the daughterboard which plug into the Tayda SIP sockets on the main board.  (my boards are slightly different than the posted layouts, but you get the idea)



3 standoffs on the left poking through bottom of the daughterboard(could have been a bit longer)


The original 78L05 would have been in these sockets on the main board


the daughterboard standoffs now plug into those main board sockets


BTW, I got the ground lifting 0.7v "trick" from Craig Anderton's Electronic Projects for Musicians, project 13