here you go Andrew.
i do not know if someone has already built, so i am assuming its not tested.
i do not know if someone has already built, so i am assuming its not tested.
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Thank you Prasi, If I want to use only two pair of power transistors how much is the voltage that I must put on rails?
Depends on your speaker impedance (load)
+/-65 for 8-ohm and I wouldn’t use at 4-ohms often or at high volume.
For 4-ohm stability and 2-ohm dips I would suggest +/-55Vdc.
You can use higher voltages, but will decrease SOA and dependability. I usually push the limits, but I also don’t mind rebuilding an amp if it blows up.
+/-65 for 8-ohm and I wouldn’t use at 4-ohms often or at high volume.
For 4-ohm stability and 2-ohm dips I would suggest +/-55Vdc.
You can use higher voltages, but will decrease SOA and dependability. I usually push the limits, but I also don’t mind rebuilding an amp if it blows up.
Ok, I well noted! I normally use 8 ohm audio towers (independently speakers box connected to passive crossover). thank you bullittstang for your explanation!
If you use the transistors spec’d (didn’t look them up prior) you should be safe with +/-65Vdc, they are 250V 200W parts.
Not 100% sure - maybe someone else will chime in to confirm, but I wouldn’t think it does.
I would not use +/-65 with those BJTs, you would need to step up to their big brother version.
MJL3281/1302 or MJL4281/4302 the bigger brother
I would not use +/-65 with those BJTs, you would need to step up to their big brother version.
MJL3281/1302 or MJL4281/4302 the bigger brother
To build the AX40 should I use the v1.4 gerbers in post #2 of the AX40 build thread? Are those the correct/best/latest?
The top copper has a single arc (looks like to indicate the jumper wire location). Should these be ordered as single or two layer boards at PCBWAY or JLCPCB? I ask since I don't see capture pads on the top copper layer, only the arc for the jumper wire location, so I am not 100% sure.
The top copper has a single arc (looks like to indicate the jumper wire location). Should these be ordered as single or two layer boards at PCBWAY or JLCPCB? I ask since I don't see capture pads on the top copper layer, only the arc for the jumper wire location, so I am not 100% sure.
