Suppresses hum emissions
The 80 rectifier tube is suitable for radios and small amplifiers. This diode is smaller than the 5U4G and is intended for lower DC output current and lower voltage. The maximum value of the first capacitor is 20uF, which is lower than the 5U4G, but 20uA is sufficient since the 80 is for 135mA max. Due to the high anode impedance of this tube, the output ripple will also be low, and I must say that the 80 is a very good choice if it is to be used with low currents, such as 135mA or less.
For very low ripple, we recommend using a Rundahl LL1673 dual coil choke in a low CMR configuration. In this configuration, there is virtually no field emission from the choke.
- Hard metal filament, series connection
- Hand-blown globe-shaped glass
- Oversized getter
- Gold plated pins, black ceramic UX4 socket. (White bottom). Suitable for Yamamoto's vacuum tube sockets.
All in all, the 80 rectifier tube is a very reliable vacuum tube, and its relatively high first capacitor makes it a comfortable tube for electronics designers. However, this tube is also characterized by a rather high dynamic resistance, which reduces the hum of the power supply and the radiation of hum to the rest of the circuit. For headphone amplifiers, this tube is also a very good choice.
|5 volts (AC or DC)
|Filament voltage tolerance
|AC Input Voltage
|DC Output Current
|First capacitor connected to anode