I want to replace this selenium diode on an old tube amplifier with a silicon equivalent. Normally, this diode would have a lower value resistor in series with it such as a 15 ohm. Instead, this one has a 15K ohm resistor, only having about 20mA of current going through it. Is it safe to say, in this case that I can simply do a swap of the selenium for a 1N4007 and not worry about adding more resistance?
From what I've read because the voltage drop of a selenium is higher about 7-10V, and the 1N4007 is only 0.7V, you would need to add a small resistor such as 100 ohm in series with it to achieve the same voltage drop and get the same voltage in the circuit as before.