Could you please explain what issue you were alluding to then?

The fact that the input is not a bistable circuit but will tend to settle at the bias voltage level, not high or low.

So post #12 should work basically the same as #7, shouldn't it?

Since they are not connected the same, no.

 

The fact that the input is not a bistable circuit but will tend to settle at the bias voltage level, not high or low.

Which is why I suggested changing the bias point.

Since they are not connected the same, no.

Sorry, I just can't see the fundamental difference between #7 and #12 connection-wise.

 

Sorry, I just can't see the fundamental difference between #7 and #12 connection-wise.

It's the value of the resistors that make for proper operation.

 

It's the value of the resistors that make for proper operation.

Ah, I see. Well I did at first try using those values in the simulator, but it didn't seem to latch at all. Adjusting them got it to latch but perhaps as a side effect introduced the oscillating behaviour.