Hi be80be, ok thanks for this , I will see if I take some time to make a good listing of all the windings.

 

That's a lot of wiring for that schematic!!!

I'd just rip it out and start over as per schematic.

By the look of it - it may well have started out with a selenium rectifier. Its probably worth a bit of research into forward volt drop.

Hi Ian, yeah, the wires were all there before somebody else already put the hands on it, all wires were cut and therefore somebody set it up
according to the schematic i showed.

 

You have missed the point most big chargers like you have parallel the low voltage wiring to get more amps.
Or I wasn't clear
But you need to list all the wires on the transformer.
I would start with numbering them then test to see if there the same I would almost bet you have two 17 volt outputs but need to see how may wires there are 4 6 or 8

I have a big transformer the low side can do 32 volts at 40 amps or two 16 volts at 40 amps or one 16 volt at 80 amps.
To get the 80 amps I have to parallel the two 16 volts

The schematic as posted shows an unused centre tap on the secondary - no other ratio options anywhere.

Perhaps the TS should screw up a bundle of scrap wire and cram it in there so: "it looks right".

 

In your first post you said " The transformer has a lot of output windings rangeing from 0V up to 32V
from what i could measure. I choose the 2 wires which showed on 17,70V. "

Can you give us a set of all the connections available? It would help us help you.

Also, I see what appears to be the wires to the battery under charge emerging from the right and left sides toward the bottom of the front panel. Those appear to be a little thin for 50 amps and they don't look like they are grommetted to keep the insulation from wearing away.

 

The schematic as posted shows an unused centre tap on the secondary - no other ratio options anywhere.

Perhaps the TS should screw up a bundle of scrap wire and cram it in there so: "it looks right".

Looks like there is

 

Hi Ian, yeah, the wires were all there before somebody else already put the hands on it, all wires were cut and therefore somebody set it up
according to the schematic i showed.

Assuming its the original transformer - the secondary CT is probably for charging 6V batteries. Take the full voltage from both BR DC terminals, use the CT for 6V - you cane take power from + or - as long as you connect the battery right way round.

Go carefully if someone bodged it with an electronic equipment transformer - they're not wound the same.

 

Hi whitehaired novice, thanks for your comment. I will try to map all the transformer secondary wires and post a picture here.

The photo be80be shows in his post is after I have already rewired the thingy with only one rectifier bridge.
But the on the schemathic I probably did it wrongly by leaving that unwired center tap. In fact there was a bunch of unconnected wires.

 

I find this out right funny first off a charger that size I'm sure had 3 maybe more charge rates maybe even one jump setting.

And from the picture and the circuit posted there both wrong

This is more close but newer charger you look to have a old very old snapon charger maybe It's nor sure from the pic but there should be a name plate on it some where.

 

be80be--that is an amazing catch!

 

My question is why the capacitors in this charger? I've been inside many old chargers and have never seen a cap in any of them. And by old some of them even had selenium rectifiers in them. Is it possible that who ever messed up the wiring added the caps?

Hi Saxa,
You are lucky. Your Battery Charger with some Elco applied, can do the 2nd function besides basic task. It can be used as an 'ac to dc adaptor' to powering up Transistor Radio or CAR VACUUM CLEANER or something else that needs clean dc power sources like Batteries..

 

there are so many things wrong with this unit