Just curious, is one really necessary except for ignition noise? It would seem to not be beneficial to the magnetic field collapsing in the coil.

 

Yes, you need a condenser. The condenser prevents current from flowing across the points after they open. The current flows from the battery to the primary side of the coil and then back to the battery when the points are closed.
When the points open the circuit breaking causes a sudden high voltage surge
from the coil primary to the coil secondary. That produces the spark at the plugs.
If you do not have a condenser, the current will travel across the open points (arc) and quickly burn up the contacts.
pg

 

Theres still some spark even with the cond. Why not use a diode instead? Not a silicone of course but maybe a fast recovery. What do they use in the electronic modules if they have one?

 

no voltage surges from the primary to the secondary
no voltage even crawls across
they have no mechanical connection at all
A process called induction occurs

 

Its all mechanical even if we're dealing working on a quantum physics level like in a transistor. With an electronic modual there's probabally something to keep the electron flow from reversing.

In a circuit with a relay thats close to sensitive componants a 'kick-back diode' is placed in series to keep current from reversing & causing damage.

Anyway this is perhaps over thinking things because a condensor works & why mess with with something thats working...........well maybe because it's fun?

 

You are talking garbage
But at least you know you are making it up
Don't forget to fit a radio suppressor to your next rocket

Voltage surge from primary to secondary....... now thats a good one

 

This cat's trying to bait me into a pissing match. I got better things to do.