Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: mmrxcsr01 on August 23, 2022, 10:01:34 am

Title: A little PT help, if you please..
Post by: mmrxcsr01 on August 23, 2022, 10:01:34 am
I have a P/T in hand that has BOTH primary wires as black. Is there any way to determine which I should route to the fuse and switch? It's an older Weber, and the wiring diagram I received with it shows the black as being correct for the age....thanks all, much appreciated.
Title: Re: A little PT help, if you please..
Post by: sluckey on August 23, 2022, 10:06:18 am
Connect the black to the switch/fuse. Connect the other black to the power cord neutral.
Title: Re: A little PT help, if you please..
Post by: Cirrus on August 23, 2022, 10:13:03 am
Connect the black to the switch/fuse. Connect the other black to the power cord neutral.


Sorry Sluckey, you've got that the wrong way round. It's actually BLACK that goes to the Switch/Fuse, and the OTHER black that goes to the power cord neutral.
Title: Re: A little PT help, if you please..
Post by: dude on August 23, 2022, 10:37:24 am
Connect the black to the switch/fuse. Connect the other black to the power cord neutral.


Sorry Sluckey, you've got that the wrong way round. It's actually BLACK that goes to the Switch/Fuse, and the OTHER black that goes to the power cord neutral.
What, you just said the same thing as Sluckey said..!
Title: Re: A little PT help, if you please..
Post by: mmrxcsr01 on August 23, 2022, 10:38:52 am
So if I read you right, it doesn't matter in this case, correct?
Title: Re: A little PT help, if you please..
Post by: thetragichero on August 23, 2022, 10:41:35 am
transformer don't care.
you just need to make sure the power from the wall is wired properly (line/black to fuse then switch then transformer, neutral/white to transformer)
Title: Re: A little PT help, if you please..
Post by: sluckey on August 23, 2022, 01:16:19 pm
Connect the black to the switch/fuse. Connect the other black to the power cord neutral.


Sorry Sluckey, you've got that the wrong way round. It's actually BLACK that goes to the Switch/Fuse, and the OTHER black that goes to the power cord neutral.
I had it right for the U.S. You must be thinking about the U.K. wiring.  :wink:
Title: Re: A little PT help, if you please..
Post by: thetragichero on August 23, 2022, 02:32:50 pm
I had it right for the U.S. You must be thinking about the U.K. wiring.  :wink:
if i remember correctly, uk amps with an attached power cord must switch both line and neutral