Centaur ball kick to playfield coil,is the manual correct?

[stevebm1]

Can any kind centaur owners tell me what coil is correct for the ball kick to playfield (solenoid 15 in test mode),the manual says is should be an AO-25-950,but the machine I recently picked up has had a standard 26-1200 coil fitted by someone in the past,and I would like to fit the correct one.I know some of the old bally manuals have printing errors,so it would be nice to know the correct one


Thanks

 

[Gary Flower]

It was an operator hack (I believe promoted by Bally) to use the knocker coil as a spare to replace coils on playfield: specifically bumpers and slingshots.
Out of curiosity, you may wish to see what coil is installed on the knocker and whether it's original.

 

[stevebm1]

yes I was thinking that,the whole knocker assembly was missing from the machine when I got it,but luckily Jim(my pinballs) had a spare and so I was able to replace the whole assembly,not sure if a 26-1200 is more or less powerful than the 25-590 that is supposed to be used to fire the balls onto the playfield for multiball though?

 

[astyy]

26-1200 is more or less powerful than the 25-590

25-590 is approx 4 Ohm vs 26-1200 at 10.8, on pinball coils with lots of windings lower resistance = more power

 

[stevebm1]

Thanks for that explanation ,looks like I need to source the proper coil then for more power,they are available from the european sellers,unless someone in the uk has one spare

 

[AlanJ]

sorry no 25-950’s in my spares only 26-1200’s

 

[astyy]

It would be interesting to unwind a beater 26-1200 to experiment with the power difference, I calc approx 160 ft of wire would need to be removed also bear in mind the 26 gauge wire would have a lower current rating.

 

[Jay Walker]

Doesn't a higher number of turns in the winding increase the resistance, reducing the power produced? Old-time Stern games such as Seawitch had flipper coils with 25-500 primary winding for main flippers, and 25-600 for additional flippers. Williams took a different tack; Grand Lizard has the normal 'Blue' 23-600 primaries for the lower flippers, but used Red 24-600 primaries for the upper flippers (the only time I recall seeing such coils).

 

[astyy]

Doesn't a higher number of turns in the winding increase the resistance, reducing the power produced?

For pinball coils yes that's my understanding.
(For school science projects "few turns round a nail type" not necessarily!)