Production of 6n3 Pushing 6p1 Single-ended Tube Amplifier

6n3 push 6p1 single-ended production

Two 6p1 power tubes are used for stereo class A output, with an output power of dual 2-3W. Since the 6p1 tube works in pure class A, the sound quality is sweet, and the actual distortion-free volume is equivalent to that of a 15W transistor amplifier. Equipped with a high-sensitivity speaker, it is mainly used to appreciate human voices and light music, and its timbre is as pure as that of high-end audio!

Adopt 6n3 single-stage amplifier without large loop feedback circuit

Actual production:

This time, a 45w radio amplifier is used, with full-wave rectification, 150uf+340ohm+150uf filtering, and the output uses a small single-ended amplifier from Sugon Laoyi! The overall quality is very high, and audiophiles who are interested can make it, the sound will not disappoint you!

The power transformer is removed from the red light machine (double 230, 6.3, 6.3) with three outputs. I use the output transformer from Shuguang Laoyi Niu! You can also use a small power transformer (5-10w) to modify it. The details are as follows: The output impedance of the 6p1 class (6p14/6p15, etc.) small power tube is about 5k ohms, and the load speaker impedance is 4/8 ohms. The primary coil ratio of the output transformer is

From this calculation, when Rs=4oum, n=31, which is consistent with the 220/6.3v transformer.
When Rs=8oum, n=22.3, which is consistent with the 220/9v transformer. This voltage ratio can be used as a substitute for a 10w power transformer.
Since the output transformer has direct current passing through it, the iron core is prone to magnetic saturation. Therefore, the iron core of the power transformer converted into an output transformer must be disassembled, and the original staggered insert method is changed to stack the E and I sheets respectively and then insert them oppositely. A 0.2mm thick film is placed at the junction of the two parts of the iron core for magnetic isolation. The inserts must be tight, otherwise it will affect the sound quality.

The test was also satisfactory: