I noticed the same exact issue recently. I use chrome on iPhone. One trick I figured out is to slightly move my thumb up as I tap “like” and the emoji menu usually sticks if I do that. It goes away immediately if I hold my thumb. The other thing I noticed is that sometimes when I try to hold a...
I also bend both legs (outward though!) and then solder both. I have never had a problem not being able to pull a component out. I just use pliers when I apply heat.
I think the R in that filter is not just R11. Let me take a deep breath here and try to remember my first year of college… the signal at Q3’s base “sees” an input impedance that’s determined mostly by circuit topology (it’s a common emitter with feedback resistor - don’t know the formula for the...