Thanks....Here it is:
Basically I'm building an Atari Punk Console w/ 556 chip going into an Active Low-Pass Filter using the 4558 chip, then from the LPF it will go into 1 input of a passive ring mod using 2 transformers and 4 Germanium diodes, then into the other input of the Passive ring mod will be a 555 LFO, which I can also feed into the CV of the 556 APC...I will have a DPST switch to take the 555 LFO out of the circuit, like to turn the ring mod off or to feed an external instrument into the other input of the P. ring mod through an external jack, then the output of the ring mod will be pre-amplified with an LM386 circuit, not connecting pin 1 to pin 8 for minimal gain...Finally the LM386 will go to a DPDT switch to either go directly to output jack or directly into a Lo-fi Delay PT2399 circuit...And then just for fun I will add an arcade button killswitch...hehe
Let me know if you think all of that is gonna give me problems if they are sharing the same supply rail?....Would there be a difference between putting 1 large electrolytic Cap Vs. 5 large Caps for each chip so they can be close to the chip???...Could it help, or what do you think would help?
The reason I asked my original question was because I built a 2W mini amp with a 4558 Pre-amp going into an LM380 running both chips at 18V with heatsinks, and just those 2 chips were sharing the same supply rail, and besides the large Cap, extra .1 cap to GND I had a 10 ohm resistor in parallel with a ferrite bead to try and get rid of oscillation noises, but in the end it turned out I had to add a certain resistor at the input of the LM380, so I'm not really sure if sharing the supply rail had anything to do with that....Anyways, let me know what you guys think, now that you know what I'm trying to do...Thanks again