I host a podcast and this is for recording interviews. The reason I want to record off of the speaker and not from a tap style recorder is because the speakerphone circuitry mutes when I'm talking, allowing me to record only the person on the other end.
I currently mic the speaker and record it, but thought it would be a cool project to hardwire it to the mixer.
I'm trying to take the signal going to the speaker and convert that to line level so I can record it with a run of the mill mixing board. The linked website above it says that speaker level is around 3 volts, and line level is 0.3 volts.
If I measure the power on the speaker feeds it is indeed 3 volts. But before I realized the difference I hooked up the mixing board at 3 volts and all I got as a buzz. When hook some headphones up to the leads I hear the dialtone, pretty loud.
When I drop in the speaker level to line level circuit that I built I get nothing on the mixer, and when I plug in headphones, I hear the dialtone, I assume 10Db lower.
When I try measure the voltage coming out of the circuit I built pictured above, it measures 0 not 0.3 as I would have expected.
And this is where I'm lost, I don't know anything about troubleshooting/designing audio circuits.
I do not have the schematics of the phone, and thus thought that interfacing with the speaker would be the easiest method.