JMicro
New Member
2 issues
1 dropping ac line to 110 or 117 to make it easier on amps.
2 best practice for overall B+ voltage drop. Like when you remove a selenium rectifier.
I have seen posts on dropping ac line volts with buck transformers or zener diodes. Why is it not good just to use a dropping resistor.
I also work on Zenith FM tube radios and remove the selenium rectifier. I usually put the drop resistor after its rectified before the first cap.Then I noticed later units that used a more modern diode instead of selenium put the drop resistor before it was rectified from the factory?
On my amp I use a 5y3 .
I have another amp I built and use a 1N007 The tranny puts out too much because it was salvaged from a unit with more tubes so I used drop resistors to get it down its a pp amp it sounds OK to me
1 dropping ac line to 110 or 117 to make it easier on amps.
2 best practice for overall B+ voltage drop. Like when you remove a selenium rectifier.
I have seen posts on dropping ac line volts with buck transformers or zener diodes. Why is it not good just to use a dropping resistor.
I also work on Zenith FM tube radios and remove the selenium rectifier. I usually put the drop resistor after its rectified before the first cap.Then I noticed later units that used a more modern diode instead of selenium put the drop resistor before it was rectified from the factory?
On my amp I use a 5y3 .
I have another amp I built and use a 1N007 The tranny puts out too much because it was salvaged from a unit with more tubes so I used drop resistors to get it down its a pp amp it sounds OK to me