Which BJT that are in production is the closest to 2SC2705 / 2SA1145 that come from Toshiba, Onsemi, NXP etc ? ... Closest is with the COB 1.8-2.5 pF in mind and a Pc of 600mW or more
I have looked but might have missed one or two
I have looked but might have missed one or two
I am aware of those but the KSA1381 is EOL and in last shipment. I will keep on looking 🙂 there must be something..
full analogs (the same crystal in a different case) - 2SA1360\2SC3423, incomplete analogs - 2SA1370\2SC3467, 2SA1371\2SC3468, 2SA1123\2SC2631, 2SA1124\2SC2632, 2SA1208\2SC2910, 2SA1321\2SC3334, 2SA1353\2SC3417, 2SA1380\2SC3502, 2SA1478\2SC3788, 2SA1540\2SC3955, but this is old information, maybe it will help here are also possibly suitable 2SB1109\2SD1609 and 2SB1110\2SD1610
You can try TTC004B/TTA004B to Q8/Q10. Cascode stages are not very sensitive for internal capacitance. I'm using them in my amplifier, with perfect results.
I am considering this amp as well as the OEM A65 and P-7100 slightly updated with newer parts, kinda what Accuphase is doing for their A80 and P-7600
Hello everyone, after following the thread of this amplifier and the good opinions, I have ordered a complete set of A60+ V1.2, I would like to know if there is a verified schematic, because the Chinese one is not reliable, thanks.
thanks for the schematic, I see that there are quite a few variations with the one I have received, for example the final resistors, as well as the transistors, the real value of the material sent is 0.25R, although the board says 0.47R, and the transistors are 2SC5200 and 2SA1943, the scheme is more like the simple A60, basically the same except the number of transistors and input capacitors, is it correct, thanks.
I have not tested them yet, I want to use for the simple A60 the box of a Luxman Avance Z504, but it does not fit if I want to use the original system of Heat Pipes, so I have released the transistors from the board to place them in the place of the Sanken, when I verify the gain of each model, I want to make an active system, the A60+ for mid bass and the A60 for treble.
in the 2 models I am going to replace the main capacitors by others of more capacity, in the A60 I have already changed them by 22.000uF unit.
in the 2 models I am going to replace the main capacitors by others of more capacity, in the A60 I have already changed them by 22.000uF unit.
Привет всем. Не совсем правильно. Резисторы r23 и r24 должны быть в линии питания VAS.
And thanks. I am considering this amp and need to learn how to simulate, so I will probably do that in the near future.
You used a bare board and a bunch of Chinese parts. Write what the sound is like and tell me about good or bad impressions.