Timeline for Why is my amplification this little
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 22, 2020 at 15:08 | answer | added | Graham Stevenson | timeline score: -2 | |
| Nov 17, 2015 at 3:57 | history | tweeted | twitter.com/StackElectronix/status/666465211004690432 | ||
| Nov 5, 2015 at 12:57 | vote | accept | CommunityBot | ||
| Nov 4, 2015 at 8:47 | answer | added | Andy aka | timeline score: 1 | |
| Nov 4, 2015 at 7:59 | answer | added | WhatRoughBeast | timeline score: 2 | |
| Nov 4, 2015 at 7:39 | comment | added | Neil_UK | what are D1 and C2 supposed to do? Your schematic has a curious mix of dots on some connections and not on others. | |
| Nov 4, 2015 at 7:33 | comment | added | user90392 | So another op-amp would work better? What do you recommand? | |
| Nov 4, 2015 at 7:31 | comment | added | got trolled too much this week | The circuit looks fine for its purpose. LM741 will hiss a lot if you actually plan to use it as a preamp to record stuff, but just for sound pressure measurements, it should be workable. | |
| Nov 4, 2015 at 7:30 | comment | added | user90392 | OK, i will try that, but if you look at the circuit and the calculation, those seem correct? | |
| Nov 4, 2015 at 7:28 | comment | added | got trolled too much this week | Unless you measure on a scope (the peaks) music is not a good test. Music has high crest factor. Use pure sine if you measure with voltmeter. And I trust you're measuring on the AC scale, otherwise it's probably just the DC offset of your opamp... | |
| Nov 4, 2015 at 7:25 | comment | added | user90392 | I did use music, but was about 30-50 cm away. It was just some music from YouTube and it was for sure 90dB. I measured that with a real decibel meter from the same distance | |
| Nov 4, 2015 at 7:12 | comment | added | got trolled too much this week | What was your audio source for the test? How far? Pure sine or did you use music? | |
| Nov 4, 2015 at 6:55 | history | asked | user90392 | CC BY-SA 3.0 |