On Sat, 11 Sep 2010 12:28:15 -0500, Paul Nelson wrote:

oops. full-wave, but not bridge.

But you could replace the diodes with a bridge, just ignore either the
plus or minus terminal on bridge and use centre tap of transformer as
per existing circuit. Those high current large bridges are probably
easier to buy and mount on the heatsink than a pair of power diodes.

The unused pair of diodes in the bridge wont do any harm.

Grant.

On 9/11/10 10:41 AM, Paul Nelson wrote:
The part in the first pic ("diode") is a circuit breaker. The two
ceramic buttons on the "plate" are the diode rectifiers, that'd be a
half-wave bridge configuration.

Hope that helps!

On 9/10/10 8:53 AM, LSMFT wrote:
Can somebody tell me what this part is?
It's a plate with 2 contacts. 2 12vac outputs from the transformer are
connected to the contacts. The output is the positive charging lead.
The other output of the transformer goes through what looks like a 12v
12a diode though I'm not sure if it is a diode. Then goes through the
meter to the negative charging lead.
It's an old charger, puts out 13.5vdc on the charger, tapers down to
zero when the battery is charged. Tough charger, dropped it a couple
times on the concrete floor. Unknown maker.

http://tinypic.com/m/bimp1g/2 Diode
http://tinypic.com/m/bimp6p/2 Plate
http://tinypic.com/m/bimp83/2 Transformer
http://tinypic.com/m/bimp9h/2 Plate contact
http://tinypic.com/m/bimpah/2 Meter connection
http://tinypic.com/m/bimpeb/2 Charger