something wrong with my bridge rectifier

jarthel · 19th July 2003, 03:38 PM

They are diodes fashioned into a bridged rectifier.

here's the diagram ("o" represents points where I soldered the leads).

o--->|-----o
| |
o---|<---o |
| |
o---|<---o |
| |
o--->|-----o

I have the Hammond 369GX and the bridged rectider is for the heater secondary which outputs 6.3VAC 2.5A. Well my mains right now is at 249.xxVAC. So heater secondary is at 7.xxVAC.

Well when I measure the VDC on the +/- leads of the bridged rectifier, it gives me 20.xx VDC. Is there something wrong?

The diodes I'm using are ultrafast Onsemi rated at 1000V 4amps.

Thanks for the replies.

jayel

moamps · 19th July 2003, 06:26 PM

Do you use this schematic?

Gunders · 19th July 2003, 06:35 PM

I have a schematic too...

well, both of these schematics show the same...

jarthel · 19th July 2003, 11:14 PM

Well I didn't really see that schematic. I just arrange the diodes in such a way that I can place them on a tag strip.

Is there something wrong with the way I arrange them? I've checked alot of times and I'm prettys sure they still follow a brdige rectifier.

Also, i must add that there is nothing else on the circuit aside from the bridge rectifier.

Thanks

Jayel

Gunders · 20th July 2003, 12:33 PM

Strange problem you have, I can't see why you should get 20V.
what do you use for measuring, scope or meter?
Have you grounded - lead of the rectifier?

19th July 2003, 03:38 PM	#1
jarthel diyAudio Member Join Date: Jan 2002 Location: somewhere in Australia	something wrong with my bridge rectifier They are diodes fashioned into a bridged rectifier. here's the diagram ("o" represents points where I soldered the leads). o--->\|-----o \| \| o---\|<---o \| \| \| o---\|<---o \| \| \| o--->\|-----o I have the Hammond 369GX and the bridged rectider is for the heater secondary which outputs 6.3VAC 2.5A. Well my mains right now is at 249.xxVAC. So heater secondary is at 7.xxVAC. Well when I measure the VDC on the +/- leads of the bridged rectifier, it gives me 20.xx VDC. Is there something wrong? The diodes I'm using are ultrafast Onsemi rated at 1000V 4amps. Thanks for the replies. jayel

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19th July 2003, 11:14 PM	#4
jarthel diyAudio Member Join Date: Jan 2002 Location: somewhere in Australia	Well I didn't really see that schematic. I just arrange the diodes in such a way that I can place them on a tag strip. Is there something wrong with the way I arrange them? I've checked alot of times and I'm prettys sure they still follow a brdige rectifier. Also, i must add that there is nothing else on the circuit aside from the bridge rectifier. Thanks Jayel

20th July 2003, 12:33 PM	#5
Gunders diyAudio Member Join Date: Nov 2002 Location: Norway	Strange problem you have, I can't see why you should get 20V. what do you use for measuring, scope or meter? Have you grounded - lead of the rectifier?