Sub oscillator for CEM3394

[Ingo Debus]

Duane R Balvage wrote:
> Then I thought, "save a step (and parts) and make a comparator out of
> the op amp." This worked... a nice square wave

I'm a bit sceptical about using TL07* or TL08* as comparators. It often
works, but sometimes they latch up. Seems to depend on manufacturer,
lot, maybe supply voltage or whatever. Another case where one should be
careful when replacing 741s, BTW.
Some comparator ICs have also the advantage that they can produce TTL
output levels although being operated from +/-15 volts.

Another note, the TL082's + input doesn't have any dc bias at all in
your circuit. Looks a bit scary to me.

Ingo