Hi All
Ma good friend is using a tube preamp that uses a 2A3 for the rectifier. He would like to convert it to a silicon diode rectifier. Any ideas or does anyone have a drawing of how to do it?
Thanks
r
i would want to learn how your friend manage to use 2a3 as a rectifier.
Technically you'll get a diode that way, but in all my years the proper way has been to connect the grid to the plate as pictured in the Western Electric schematic posted by Doz. Not to the cathode.As you do with any triode: connect its grid to the cathode (if it is an indirectly heated tube) or to the ground, where the filament will be referenced as well (if it is a directly heated tube) and you get a diode out of it.
But this will result in grid dissipation, and could lead to a meltdown and fireworks should remains of the grid make physical connection to cathode![]()
Perhaps I'm showing my ignorance here, but what exactly is the point in using a 2A3 as a rectifier? I'm not trying to sound pompous here, mind you. There may very well be a legitimate reason to do so (a potentially lower voltage drop leaps to mind), and I'm hoping someone here could enlighten me...
Thanks guys for the replies. I'm going to get the schematic for this so you can have a look. I still don't understand how you can configure a Triode for rectifier duties. Any rough drawing would be appreciated.
R
Perhaps I'm showing my ignorance here, but what exactly is the point in using a 2A3 as a rectifier? I'm not trying to sound pompous here, mind you. There may very well be a legitimate reason to do so (a potentially lower voltage drop leaps to mind), and I'm hoping someone here could enlighten me...