I tried to get the schematic of my old HK A401 by following the layout.
Does this look like a possible amp and if it does, is there a way to improve it ?
Does this look like a possible amp and if it does, is there a way to improve it ?
An externally hosted image should be here but it was not working when we last tested it.
Q3, Q4, Q9, Q8, Q2 get power from V+00940 said:
Q5, Q6, Q10, Q1 get power from V-
Q7 gets about no power. Checking with a dmm while having the amp playing, the transistor has about 1V at each pin. I ran a basic electric simulation in LTspice, using generic transistor and it's in line with what I get.
furthermore, voltage with load are in fact +/- 37V.
I'm trying to get this schematic straight because this amp sounds (very) good and I could perhaps try build a few, to use them in a small home theater project for my father.
i updated the schematic. I forgot to add a small pcb hanging right under the main pcb for the amplification section.
As is, all the parts on the pcb are on the schematic, as well as all the wires coming in and out. If it's incomplete, it'd mean that they put a section of the amplification on the preamp pcb, which doesn't really make sense since they have put this input cap
As is, all the parts on the pcb are on the schematic, as well as all the wires coming in and out. If it's incomplete, it'd mean that they put a section of the amplification on the preamp pcb, which doesn't really make sense since they have put this input cap
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