02-04-2019, 07:58 AM
Hi Z,
This something I dallied with a while back without completing. I ran my Opal with a 12v RB106 regulator and it worked for a while but the regulator was working really hard and the points quickly burnt.
Bob's summary is pretty close to what I was doing. I thought to double the resistance to about 4 Ohms. From memory, if you go too high on resistance you start limiting the output plus it's hard getting the number of turns you need into the physical space? By dropping the winding wire one size you can get almost double the number of turns into approximately the same sized coil. I had a jig for winding a square coil but found it difficult to then bend it into the curved shape to fit inside the small diameter body. I intended using it with a standard armature rather than rewinding that as well.
It was around about this point that other problems took over my time and I've never got back to it, there's a little project-ette pile of bits on the corner of the bench. The Opal seems to work fine on the 12v battery for an all day 150 mile run without charging...…………..
I can dig out the photos of the homemade winding gear, numbers and rough calcs if that helps?
Dave
This something I dallied with a while back without completing. I ran my Opal with a 12v RB106 regulator and it worked for a while but the regulator was working really hard and the points quickly burnt.
Bob's summary is pretty close to what I was doing. I thought to double the resistance to about 4 Ohms. From memory, if you go too high on resistance you start limiting the output plus it's hard getting the number of turns you need into the physical space? By dropping the winding wire one size you can get almost double the number of turns into approximately the same sized coil. I had a jig for winding a square coil but found it difficult to then bend it into the curved shape to fit inside the small diameter body. I intended using it with a standard armature rather than rewinding that as well.
It was around about this point that other problems took over my time and I've never got back to it, there's a little project-ette pile of bits on the corner of the bench. The Opal seems to work fine on the 12v battery for an all day 150 mile run without charging...…………..
I can dig out the photos of the homemade winding gear, numbers and rough calcs if that helps?
Dave