transformer hookup for a newbie

staggerlee · 14th January 2006, 07:28 PM

Hi All,

I've got a pretty basic question about hooking up a transformer. the wiring diagram for the hammond 270cx shows

} * Red (275v)
} * Red/Yellow (0v)
} * Red (275v)

do the two reds go the rectifier, and the 3rd to ground? or do you combine the reds, and connect them and the 0v to the rectifier? or something else.

Also, regarding unused taps. do these get tied together?

BWRX · 14th January 2006, 07:41 PM

The red wires go to the rectifier and the red/yellow wire is the center tap and is grounded.

The other wires are the filament windings. Do not electrically tie them together. If you're not going to use them just keep them insulated from each other.

What kind of amp are you building? Be very careful when dealing with mains voltage.

staggerlee · 14th January 2006, 11:48 PM

Thanks. Do you know how many hits on this site you get when you search for "transformer hookup"? This is for a tube preamp. by the way.

Thanks also for the caution. I dont want you to hear about me on the news...

14th January 2006, 07:28 PM	#1
staggerlee diyAudio Member Join Date: Jan 2005 Location: United Snakes of a Merry Cow	transformer hookup for a newbie Hi All, I've got a pretty basic question about hooking up a transformer. the wiring diagram for the hammond 270cx shows } * Red (275v) } * Red/Yellow (0v) } * Red (275v) do the two reds go the rectifier, and the 3rd to ground? or do you combine the reds, and connect them and the 0v to the rectifier? or something else. Also, regarding unused taps. do these get tied together?

14th January 2006, 07:41 PM	#2
BWRX diyAudio Moderator Emeritus Join Date: Jan 2005 Location: Pennsylvania	The red wires go to the rectifier and the red/yellow wire is the center tap and is grounded. The other wires are the filament windings. Do not electrically tie them together. If you're not going to use them just keep them insulated from each other. What kind of amp are you building? Be very careful when dealing with mains voltage. __________________ Brian

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14th January 2006, 11:48 PM	#3
staggerlee diyAudio Member Join Date: Jan 2005 Location: United Snakes of a Merry Cow	Thanks. Do you know how many hits on this site you get when you search for "transformer hookup"? This is for a tube preamp. by the way. Thanks also for the caution. I dont want you to hear about me on the news...

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