I thought so(the marking doesn't look good), but maybe it is original one...
I saw at post #3317 there are AX-14 also use jengkols (with better marking)
but don't worry I have spares some old motorola 15003-15004 if this one is blown 😀
I will try at rail +/-55VDC for 8 ohm load, is it is okay?
if they were original I believe they wont fail 😀 it is worth to try
I just realize it ... & I will try to redraw it if needed 🙂 & fortunely I have some LM4562 😎
Regards
No need to redraw...
Attachments
Very first draft with mirrored output transistors. Can someone check it please?
A schematic would be very helpful 😉.
regards
I see a inverted 1N4148 make sure all is corrected before you continue, I think the original layout look good no need to redraw 🙂 kind look like vintage style traces I like it 🙂
Regards
Juan
Attachments
Very first draft with mirrored output transistors. Can someone check it please?
A schematic would be very helpful 😉.
regards
Bias transistor must be replaced with BD139 or MJE340 in your pcb.
Regards
AX-11 with some very old TO3 output transistors. The power suply is +- 53VDC and it play very good,very silent without signal.Love the sound.
Regards
Zoky2
Regards
Zoky2
Sorry,here are some picture of AX-11.
Regards
Zoky2
Nice work,
Regards
A17 CFA
Hello Mile,
thanks for schematic. I will check the layout and then build a version.
For what other transistors you recommend a heat sink or mounting on the main heatsink?
Thank you for a new amplifier 🙂. Feels like an early Christmas

regards Olaf
Hello Mile,
thanks for schematic. I will check the layout and then build a version.
For what other transistors you recommend a heat sink or mounting on the main heatsink?
Thank you for a new amplifier 🙂. Feels like an early Christmas
regards Olaf
A9 CFA
Attachments
dear mr apex,
I want to make a power subwoofer, what type recommended to drive 2 ohm 200 watts speaker
I want to make a power subwoofer, what type recommended to drive 2 ohm 200 watts speaker
dear mr mile,
I want to make a power subwoofer, what type recommended to drive 2 ohm 200 watts speaker
I want to make a power subwoofer, what type recommended to drive 2 ohm 200 watts speaker
thanks mr mile, and what psu recomended for it, vac dan vaA17 new pcb
thanks mr mile, and what psu recomended for it, vac dan va
Outputs and bias transistor are from botom side of pcb... A17 use psu and protect same as AX11.
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