A60 Current Feedback Board Kit Power Amplifier Board 2SC5200.A1943

Description

This is a kit that needs to be soldered by itself.
The kit does not contain 6 pairs of large tubes and 4 10000UF main capacitors. These two items need to be purchased separately.
Jinzizi A60 is a generation of flagship machine, high and low frequency density, control is quite good, the level of detail is very good, the circuit is fully symmetrical architecture, current feedback, the main feature of this circuit is to use complementary push-pull circuit from input stage to output pole. It's easy to get a conversion rate of hundreds of volts per microsecond, and it's quite good for capacitive loads. The sound quality is better than the previous A2.
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Different tubes are matched with different sounds, but note that this is pure after-level, there are customers who come with 2.1 speakers than bass, then it is better to buy a subwoofer.
***With Toshiba 2SC5200.A1943 Good bile, delicate, full tone, slightly dark
***With ON series high-power tube, the sound is bright, the level of overtone is very good, and the knot is strong.
***With Japan's Sanken high-power tube, deep dive, good strength, low frequency and strong, but static as much as possible to achieve 200MA or more per tube
Main filter selection:
ELNA ADUIO and Japan Nikon KG can be selected as the main filter, but personal preference for KG capacitors, ELNA tone is always a bit darker, the level is general, the music taste is not as good as KG.
Personally, thanks to the excellent circuit architecture, the precision HIFI tube 2SC2240 2SA970 2SA2705 2SA1145 pairing, numerous modified circuit parameters, no matter low frequency effect, vocal sweetness, high frequency transparency, than KSA50, anti-Gaowen and the like
Machine is better
The circuit has a rectifier circuit, so you only need to connect the transformer, no need to plug the rectifier board.
Wiring installation is very convenient.
The fully symmetrical architecture plus sophisticated transistor pairing makes the midpoint very stable from debugging.
Adjust the static current of the large pipe to 100-300mA per tube, the board has 1 TEST point, and the pressure drop of the test 2 end is 20-60MV.
Note: Remember to add mica film when installing large tubes. Mica film must be coated with thermal silica gel.
Operating voltage: AC24VX2 ~ AC42VX2 plus AC12V Remarks: AC12V is used to protect the circuit
Output power: 200W 8 ohms 300W 4 ohms
Distortion: 0.002% Signal to Noise Ratio: >100dB
PCB size: 195*80 mm
The circuit resistance is standard with 718 resistors, and the protection circuit is Japan Omron. The input tube is Japan Toshiba HIFI quality tube 2SC2240 2SA970 precision pairing.
Pushed to be the king of NJE15034/35. The high-power tube can be paired with 6 pairs of Dongzi 2SC5200.1943 or 4 pairs of three-inch tubes. Of course, it can also be equipped with ON tubes.