3 ms·
5687 is a general purpose triode, with lower gain than the 12AX7 ubiquitous in guitar amps. They'd be useful in hifi preamps.
by i_am_proteus 4y ago
5687 is a general purpose triode, with lower gain than the 12AX7 ubiquitous in guitar amps.
They'd be useful in hifi preamps.