Help with PT wiring

Tube or solid-state, this section goes to eleven!

Help with PT wiring

Postby spoontex » 28 Sep 2017, 13:20

Hello,

I need some help for wiring a power transformer. This one:

http://www.classictone.net/40-18097.pdf

If I have 230V I have to solder the WHT and BLK/WHT together, and the BLK and GRY are the power input.

But now the question. What is the SS ORN Cable?? and the RED/YEL CT and GRN/YEL goes to ground?

Thanks!!
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Re: Help with PT wiring

Postby alexradium » 28 Sep 2017, 13:54

ss is the shield,goes to ground.
red yellow goes to same ground of the main filter cap.
green yellow usually goes to ground,but can also be elevated 50/70 volts to prevent excessive hum and preserve cathode follower tubes.
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Re: Help with PT wiring

Postby spoontex » 28 Sep 2017, 15:13

Many thanks!! If I understand correctly, if you don't have a CT transformer, is necessary install two 200r resistors into the pilot light and ground. But this transformer have CT. If I ground, is necessary install the two resistors??

Thanks.

P.D.: the original layout shows, green yellow and red yellow to ground.

https://www.google.es/search?q=bassman+ ... Ry3a9LrI2M:
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Re: Help with PT wiring

Postby alexradium » 28 Sep 2017, 18:44

spoontex wrote:Many thanks!! If I understand correctly, if you don't have a CT transformer, is necessary install two 200r resistors into the pilot light and ground. But this transformer have CT. If I ground, is necessary install the two resistors??
no, its one or the other.
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Re: Help with PT wiring

Postby spoontex » 28 Sep 2017, 20:10

Thanks. It's a bassman aa864 that works with 120VAC. I can replace with the classic tone transformer without any issues no?
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