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Topics - Neurowork

#1
hey guys,

just finished populating my Aquaboy DX board and it worked right away. Had to rebias a tad to get right of some distortion I was having in the repeats.

I'm running it with MN3008s with MN3101 and NE571@ 12V regulated but I need to populate a RoadRage board to run it at 15V.
I have an additional pair of MN3008s which I will later use cascaded with first pair to double the delay.

I have 2 questions thought.

I was unable to get rid of all of the distortion during the biasing with Bias 1 and Bias 2. Will it help running it @15v or do I have to look somewhere else ?

I was out of 220uf electrolytics so it subbed it with 470uf. That won't be a problem right ?


I might have some troubles with the modulation section as one of the wave form causes a weird pitch shifting thing but I need to debug it on my own before bothering you guys.

Thanks !

#2
Tech Help - Projects Page / Smoothie voltages
April 21, 2013, 02:20:27 PM
Hi guys, I'm have been on a baby boards spree lately. I build a great sounding Bloviator II and an Afterlife.

I have an issue with the Smoothie I'm building. Noting comes out of it.

I'm using matched 2n5952 I got from Das Musikding. I installed them properly.

Here are my readings:
9V : 8.98
IC1 : 1=1.383 2=1.211 3=0.971 4=0 5=0.858 6=1.383 7=1.378 8=8.98
IC2 : 1=1.375 2=1.377 3=0.858 4=0 5=4.52-4.80(oscillate) 6=4.52-4.80(oscillate) 7=3.93-5.38(oscillate)  8=8.98
Q1 : G = 1.374 S = 0.858 D=0,858
Q2 : G = 1.374 S = 0.858 D=0.858

Did the usual checking, part values, soldering (reflowed all joints).
Tried to audio probe the thing. I get sound up until pin 3 of IC1 but the nothing on pin 1 (I can hear the bass part of the signal faintly).

Some pictures of the board are available here :
https://www.icloud.com/photostream/#A2532ODWYsAE4

I'm not sure what is wrong here...

Any help would be greatly appreciated.

Thanks.
#3
Tech Help - Projects Page / Afterlife & Vactrol
April 01, 2013, 07:54:29 PM
Hi guys,

Quick question about Vactrols for the Afterlife project.
I can't source the VTL5C3 anywhere around me.
However, I could find either VTL5C1, VTL5C2, VTL5C4, VTL5C9 or VTL5C10.

Which one would sound best for this project ?

Thanks.
#4
Tech Help - Projects Page / Collosalus Build
October 25, 2012, 05:37:26 PM
Hi guys,

I'm just finished populating my Collosalus board and fired it up.

As expected, it doesn't work properly.

Bypass works properly.
The effect seems to be working properly, I hear the guitar signal being sweeped but there's a high pitch hiss sweeping too, just like when tuning the radio.

The effect is powered with an Ibanez 9v.

Trimmers around noon.

There are my IC voltages, some are off compared to the samples in the build instructions but I'm not sure why, I'm hoping you guys can help me find it out.

ic1:
7.03
6.91
6.93
0
6.56
6.87
6.88
14

ic2:
6.98
6.99
6.95
0
6.99
7
7
14.03

ic3:
v
7.2
v
0
7.26
7.27
v
14.04

ic4:
2.1
2.1
2.1
0
7
7
7
14

ic5:
14.06
7
7
7
7
7
7
0
7
7
7
7
mv
7
7
mv

ic6:
7
7
13.74
0
7
0
0
14.08
14.08
10.21
14.03
13.75
14.08
14.08

ic7:
1.4
4.22
0
7.8mv
211.7mv
2.564
1.424
8.97

ic8
15.35
0
14.09

ic9
14.09
7
9.42
1.51
0
7
9.45
9.45

Here are a couple pictures of the build:




Thanks in advance.

Cheers.

C.
#5
Tech Help - Projects Page / KingSlayer project
September 16, 2012, 12:16:45 PM
Hi guys,

I just finished building my KingSlayer using MabBean PCB.
First build but it went smoothly overall. I just soldered Pot for tone and volume in the wrong way and I can't desolder them  I guess it's not too much of a problem.

I gave that bad boy a test run and it works pretty well but I noticed a couple of problems:

When I engage the OD switch to activate D2 and D3 (BAT46s) and it works most of the time except when I give a hard strum, the audio disappears and is replace by a stuttered hum. When I disengage the OD switch, everything returns to normal.

Also, I can't hear much of a difference when I engage D4, D5 and D8, D9.
I went for red diffused LED for D8 and D9. Should they glow by the way engaged ?

By the way I could not find any TC1044SCPA or MAX1044SCPA but I used an ICL7660SCPA. Other than that I didn't switch any other components beside a 390k resistor in place of 392k.

I build the buffered bypass version.

Any advice ?

Thanks.
#6
General Questions / KingSlayer project
August 31, 2012, 05:57:21 AM
Hi guys,

I'd like to build a KingSlayer and I'm doing my homework to make sure I have all the parts.
I have a couple of question though. Mouser is my main component provider.

I can't find 1n34a diodes. 1N4148 as replacement?

Mouser has a whole bunch of TLC274 with various prefixes. Which one should I go for?
**edit got my own answer from the notes :( TLC274BCN it is then.

I'm having trouble finding the switches on the Mouser site and pots, any help please?

I would appreciate the help.

Thanks.

C.