Known Issues and Building tipps for yocto 808 Clone Batch2 - January 2014 pcb version
Noise section:
Measurement AC !!
Adjust the TM4 trimmer for 130mV on pin 1 of 4558.
its important to use a good DMM (multimeter), most cheap DMM have in AC voltage measurement with 3digits high failure rates and cant display 160mV - shows only 0,01.
i highly recommend a 4,5digits or better DMM with 0,1% tolerance
i have at least 250mV so changing R127 to 47K ...
for Handclap section:
http://www.e-licktronic.com/forum/viewtopic.php?f=16&t=146&p=525#p525
hear the issue:
http://m.soundcloud.com/patrickj-ricke/yocto-handclap-issue
808 issue handclap:
http://www.muffwiggler.com/forum/viewtopic.php?t=96102&start=10&sid=d6f73a9fdac17e18f1fde05211f88b3d
copy:
This was a little tricky to figure out:
clap reverb mod -
replace r376 (47k) with 100k pot
This will vary the reverb between full and completely off.
C144 must have the correct polarity.. neg to gnd
Cowbell
Range: replace R44 und R45 with (xxx kOhm) and (xxkOhm).
Low Noise Ratio (SNR) for Mastersection
http://www.e-licktronic.com/en/content/39-master
change in the Mastersection all carbonfilm resistors to Metallfilm resistors and change all cheap electrolyt caps to LOW ESR caps..
change the ceramic cap (220p) to a c0g capaciator
Chassis
unscrew the nuts from all pots/encoder or the board bends.
if needed use washers together with spacers
Custom Rearpanel:
i´m planning for a second yocto a rearpanel with powerswitch.
in the EPS file i removed the square hole for the powerconnection, i have to connect from the pcb the gnd cable to the switch, see here - same is in the LXR Drumsynth modification.
here is the modificated EPS file.
Yocto_v1.0_Acrylic_Case_ohne_powercon.eps
