02-11-2017, 10:39 AM
Dave,
I set up a rig with electric drill and piece of strong hose connected to the shaft of the dynamo after first removing the drive gear. I tried 5 dynamos which I had rebuilt years previously. I was initially very disappointed with the voltage readings I was getting. These varied from about 1v to 4v if I remember correctly. In disgust I put the rig and dynamos back in the cupboard and got on with other things for a few months. I then tried them all again later and found that if I let the drill rig run for a few minutes there was suddenly a big increase in torque which twisted and destroyed the hose drive and also showed that the voltage generated was certainly over 6v in all 5 dynamos once I used a more substantial hose. I will have to refer to some notes I made at the time and re-post later.
Cheers,
Dave.
I set up a rig with electric drill and piece of strong hose connected to the shaft of the dynamo after first removing the drive gear. I tried 5 dynamos which I had rebuilt years previously. I was initially very disappointed with the voltage readings I was getting. These varied from about 1v to 4v if I remember correctly. In disgust I put the rig and dynamos back in the cupboard and got on with other things for a few months. I then tried them all again later and found that if I let the drill rig run for a few minutes there was suddenly a big increase in torque which twisted and destroyed the hose drive and also showed that the voltage generated was certainly over 6v in all 5 dynamos once I used a more substantial hose. I will have to refer to some notes I made at the time and re-post later.
Cheers,
Dave.