pj
Member
Hi All,
I'm messing around with a THAT1510 preamp that is a "mash-up" of fig. 4 from the THAT1510 data sheet from +IN/-IN to R1/R2 with the rest of the circuit taken directly from Jung and Garcia's Analog Devices AN-242 app note.
The circuit is currently powered from 2 x 9V batteries giving approx +/-9V rails.
I'm pretty happy with the performance considering the construction methods, however after recording the preamp with a 150ohm resistor bridging the +IN/-IN and examining the spectrogram of the recording I've noticed that there is a distinct spike at 15626hz.
I'm sure that the construction is not helping here(!!) but I curious if I was doing something obviously wrong??
cheers
Paul
edit - misleading spectrogram removed, see later postings.
I'm messing around with a THAT1510 preamp that is a "mash-up" of fig. 4 from the THAT1510 data sheet from +IN/-IN to R1/R2 with the rest of the circuit taken directly from Jung and Garcia's Analog Devices AN-242 app note.
The circuit is currently powered from 2 x 9V batteries giving approx +/-9V rails.
I'm pretty happy with the performance considering the construction methods, however after recording the preamp with a 150ohm resistor bridging the +IN/-IN and examining the spectrogram of the recording I've noticed that there is a distinct spike at 15626hz.
I'm sure that the construction is not helping here(!!) but I curious if I was doing something obviously wrong??
cheers
Paul
edit - misleading spectrogram removed, see later postings.