New original authentic TJ full vacuum tube FULLMUSIC

Rectifier tube 274B/n/+ mesh anode vacuum tube (DOME type shell),

Gold-plated feet, matched exactly by the original factory (gift box),..

There are two types of tube bases: black bakelite base and white porcelain base. (The price is different, the price is black bakelite base, white porcelain base plus 9USB, factory charge)

Directly replace each brand 5U4G/5Z3P/GZ34/5AR4/274B vacuum tube, etc.

Reminder: If there is no prompt, the default shipment is black bakelite seat

TJ fullmusic vacuum tube

Physical map shooting

274B/n/+Vacuum tube

Features: It is a dome-shaped glass bulb, four-pin bakelite base or gold-plated porcelain base, solid, mesh plate, and direct-heating oxide cathode double diode.

Purpose: Used for full-wave rectification power supply with rectification current up to 200mA.

Outline drawing and pin wiring diagram: The outline drawing is shown in Figure 1, and the wiring diagram is shown in Figure 2.

Standard working status and parameters:

Filament voltage*...5.0V

Filament current…………………………………………4.0A

L-C filter

R-M-S AC plate voltage………………………………………………550V

Total rectified current...200mA

C-L-C filter

R-M-S AC plate voltage…………………………………………………………450V

Total rectified current……………………………………180mA

*AC or DC power supply.

Average characteristic curve:

The 274A, B/n single diode current and voltage characteristics are shown in Figure 4, the DC output voltage characteristics are shown in Figure 5 and Figure 6, and the circuits in Figure 5 and Figure 6 are shown in Figure 7.

Maximum working value:

LC input filter

1. The maximum AC voltage of each anode of R-M-S………………………………550V

Maximum rectified current……………………………………250mA

2. The maximum AC voltage of each anode of R-M-S………………………………660V

Maximum rectified current………………………………………………200mA

C-L-C input filter

The maximum AC voltage of each anode of R-M-S……………………………………450V

Maximum rectified current………………………………………………200mA

Note: The input capacitor of the filter should be less than 4μF.