[Shop-talk] Which diodes for a battery charger?

[Jack Brooks]

>After stewing all night and checking this and that, I finally had a

>fortuitous stroke of near-average intelligence, attached it to a battery,

>and checked again.  D'oh - it's fine.

 

>Are open-circuit voltages in battery chargers 

>always misleading?  I didn't expect the transformer 

>output to go up with a load.  Doorbell and toy train 

>transformers don't seem to do that.

 

Karl,

 

I did the same thing with a furnace motor I used to build a rotary tumbler.
It would only spin at 600 RPM without a load.  Once I put the fan back on,
it went right up to 1,170, the right speed for the winding I selected

 

Jack.