Originally Posted by MattKing
The Gralab 300 came in a variety of flavours. Mine has a separate switch to start and stop the timing cycle. So on mine I switch it to "stop", set the time, and then switch it to start.
At the end of the timing cycle, the power goes off (and the buzzer goes if you forget to turn it off).
Just use the switch off, set time, switch on again procedure from there.
It does definitely work better though if you use longer exposure times.
And that switch is separate from the Focusing switch that turns the enlarger on without starting the timer? Because that would be a nice feature to have. I hope mine has it and I'm just missing it.