Hi,
I'm building a little LM386 based guitar amplifier, and I have some 16v rated capacitors I want to use in a couple locations. I'm running this particular amplifier at 18v (two 9v in series), and using an LM386-4. I'm not great understanding/analyzing at these types of circuits, so I was wondering if anyone could possibly help me determine whether 16v rated caps would be acceptable in the highlighted positions, or if I risk blowing them. I know I can simply get higher rated caps, but at this point I really want to understand this circuit better. Thanks in advance!
Edit: I'm currently using a 4 ohm speaker, but sometimes will plug it into up to 32 ohm speakers.
I'm building a little LM386 based guitar amplifier, and I have some 16v rated capacitors I want to use in a couple locations. I'm running this particular amplifier at 18v (two 9v in series), and using an LM386-4. I'm not great understanding/analyzing at these types of circuits, so I was wondering if anyone could possibly help me determine whether 16v rated caps would be acceptable in the highlighted positions, or if I risk blowing them. I know I can simply get higher rated caps, but at this point I really want to understand this circuit better. Thanks in advance!
Edit: I'm currently using a 4 ohm speaker, but sometimes will plug it into up to 32 ohm speakers.
Attachments
Last edited:
Thanks! Why do you say not to use 50V or higher? The "Zobel" network parallel to the speaker is a 100v mylar film cap, because that's what I had around - will that be ok? (The amp sounds fine with it..., but is it "working"?)
Elecyrolytics are chemical elements, like batteries. So need a proper voltage value for performing well. Mylar, poliester and the like are mechanical, they have no wet electrolyte to do its job.
Do you imagine a 6V charger with a 12V battery? Or a 24V charger over a 12V batt?. Surely no.
Do you imagine a 6V charger with a 12V battery? Or a 24V charger over a 12V batt?. Surely no.
The cap on pin 6 is full supply voltage, use >25V.
All the others are half supply, 16V cap is fine.
Old or cheap electrolytics will "decay" if used far below forming voltage. I have not seen this problem in a long time. Do it now; then if it ever makes trouble you will know how to specify and install a new cap.
All the others are half supply, 16V cap is fine.
Old or cheap electrolytics will "decay" if used far below forming voltage. I have not seen this problem in a long time. Do it now; then if it ever makes trouble you will know how to specify and install a new cap.