Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Ledvedder on October 27, 2022, 05:55:59 pm

Title: Artificial center tap for my 5e3 build
Post by: Ledvedder on October 27, 2022, 05:55:59 pm

My PT doesn't have a 6.3v heater center tap. Is it correct that I can just connect 2 100r resistors to the heater wires at the pilot light, then the other end of both 100r resistors to ground? Or to the tube side of the power tube cathode resistor for elevation?

Title: Re: Artificial center tap for my 5e3 build
Post by: thetragichero on October 27, 2022, 09:14:42 pm

best bet is to connect to power tube cathode. you can usually solder the resistors right to the socket pins, although if there's a short it makes the resistors difficult to replace

Title: Re: Artificial center tap for my 5e3 build
Post by: Ledvedder on October 28, 2022, 07:03:26 am

Quote from: thetragichero on October 27, 2022, 09:14:42 pm

best bet is to connect to power tube cathode. you can usually solder the resistors right to the socket pins, although if there's a short it makes the resistors difficult to replace

Thanks! I found this after posting. https://robrobinette.com/5e3_Modifications.htm#Heater_Artificial_Center_Tap