Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: newguitarsmell on January 17, 2019, 12:44:34 am

Title: Wiring in a Power Transformer
Post by: newguitarsmell on January 17, 2019, 12:44:34 am

Hi
I recently needed a vertical style PT so I got this one

http://www.classictone.net/40-18085.pdf

For a 5f2a build.

I have never used a PT with so many wires.
Which two do I use? I am thinking Black and Brown and White --
But do I need to tie in the Black and white and Brown somehow?

Please help!  :BangHead: :BangHead: and THaNKs!!

Title: Re: Wiring in a Power Transformer
Post by: DummyLoad on January 17, 2019, 12:57:47 am

what country do you live in? specifically, what's the line voltage were you'll be using the amp?


--pete

Title: Re: Wiring in a Power Transformer
Post by: DummyLoad on January 17, 2019, 01:16:23 am

if you're using a NOS 5Y3GT rectifier, use the two red wires and tie them each to pins 4 & 6 of the rectifier socket then TAPE off both red/white wires INDIVIDUALLY - we don't need them. the red/yellow goes to ground.


if you're using a "russian/chinese/bohemian" or new production 5Y3 or a GZ34/5AR4, use the red/white wires and tie them each to pins 4 and 6 of the rectifier socket then tape both red wires off INDIVIDUALLY - we don't need these. the red/yellow goes to ground.


for 120V:
1) tie the black and brown together - this is the "neutral" lead.
2) tie the black/white and the brown/white together - this is the "hot" lead.


--pete   

Title: Re: Wiring in a Power Transformer
Post by: sluckey on January 17, 2019, 08:33:11 am

Page two of that pdf clearly shows how to wire the primary.