i thought i give this another shot.
i have build the shruthi XT with a 4pole mission filterboard and from the beginning on it seemed to work fine, i was just not sure about the filter section, as that seemed very “dirty” sounding with a lot hof hi-frequency noise when the cutoff or resonance was dialed up even a little bit. first i thought this is how it is supposed to be and was quite disappointed. then i realized the sound has changed over time, so depending on how the enclosure was positioned it sounded different. that’s not right.
now i took the whole thing apart again for furter test and to check for bad connections (cold solder and such). that i couldn’t find.
but i realized that the 7805 voltage regulator is warm, which i guess is ok, but when i connect the filter board to the XT board, it gets superhot. and i wonder if that would be due to a short somewhere. strange thing is that all the controls and display are working. and until yesterday i even had the same sound again.
then i have read up on the volume pot connection variations, and changed my wired one to the “all bridged” on board version, as i thought maybe the noise gets picked up in the wires. so now i don’t have any sound at all anymore.
still the controls and display works, but the 7805 gets superhot.
and another thing which baffles me is something with the “lightshow” leds, which have been previously connected with wires, which i then took off. now i have just one LED directly on the board. and it is on or off depending on if or where i touch the IC8 right next to it. that is very strange, isn’t it?
ANY HINTS OF WHERE TO CHECK FOR WHAT ARE WELCOME. I HAVE NO CLUE ANYMORE. PLEASE HELP ME!!!