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

[Karl Vacek]

I bought the stud-mount diodes Randall suggested from Surplus Electronics.
They arrived yesterday and I put them in.  But the outputs were pretty much
the same as before I changed the diodes.  Max DC out in "Charge" was only
around 11 volts, with 4 to 6 volts AC, which I took as indicating a bad
diode as before.

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.

Anyway, it's working again - thanks to all!

Karl

-----Original Message-----
From: Randall
<snip>
here's some that should be good enough.  60 amps continuous, over 1000 amps
peak. $3 each.
<snip>