Did I really wrote this?
What kind of a transformer to use for A40?
It would be good 600VA for each channel with 45VAC 0V 45VAC, it means +62VDC 0V -62VDC. Although with 3 pairs you can go to +70VDC 0V -70VDC maximum.
I have a few questions on the FH11/12 deisgn posted in the thread. Plan to use @eaglemaster v1.07 gerber files from post #8557.
1 - Is MJE340/350 interchangeable with KSC3503/KSA1381? I see both on different versions of the board throughout this thread. Datasheet leads me to think they are, because they have similar parameters with the MJE's have higher current and disapation capabilities? Can someone confirm?
2 - Can I also substitute BD139 for a MJE340 - or is that overkill or not suggested?
3 - What are R40 & R41 (22r 1/4w 1%) but not showing on the PCB silkscreen?
1 - Is MJE340/350 interchangeable with KSC3503/KSA1381? I see both on different versions of the board throughout this thread. Datasheet leads me to think they are, because they have similar parameters with the MJE's have higher current and disapation capabilities? Can someone confirm?
2 - Can I also substitute BD139 for a MJE340 - or is that overkill or not suggested?
3 - What are R40 & R41 (22r 1/4w 1%) but not showing on the PCB silkscreen?
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Try this one. Check for accuracy.
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Which PSU did you use? Saw somewhere that Apex PSU60 is recommended.
Did you use DC protect? Which one?
Hello...
I have read the pages of the forum to start the assembly of the AX11, I had some doubts, but I found several circuits, I had some doubts:
Can I power AX11, AX14, AX17, and SD200 with PSP100, speaker protection involves delay speaker, short circuit and DC?
Which amps are PSU 05 and 07 for?
Thanks for the force !!
(using Google translator)
I have read the pages of the forum to start the assembly of the AX11, I had some doubts, but I found several circuits, I had some doubts:
Can I power AX11, AX14, AX17, and SD200 with PSP100, speaker protection involves delay speaker, short circuit and DC?
Which amps are PSU 05 and 07 for?
Thanks for the force !!
(using Google translator)
Today we tested NE555 Protection
I found a PCB error,Pin 1 at IC must be connected to GND.
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Today we tested NE555 Protection
I found a PCB error,Pin 1 at IC must be connected to GND.
Sorry about that. That is why I wrote check for accuracy. Here is an edited version.
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68x55mm
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Last edited:
They only show on the schematic (R1 on v1.0 and R40 on v1.07(snip below)), on the Power inputs (+ & -). It appears they are safety resistors for initial startup - Maybe???
Any thoughts on the MJE340/350 vs KSA1831/C3503 substitution question?
