Here is the simplified schematic of Firstwatt J2 that published in the owner's manual of J2.
It says the output stage current source is no longer an "Aleph" current source, but a version of the classic "Mu Follower".
But the simplified schematic of Firstwatt J2 shown just a basic circuit of SRPP(Shunt Regulate Push-Pull).
Since it claimed to be a Mu Follower,
I suppose the simplified schematic of Firstwatt J2 should be just like this.
At first, I guest the regulator IC in the schematic is TL431.
Then the voltage drop of those two resistors will be 2.5V, it seems too high.
So, I guest the regulator IC in the schematic is LM385.
An externally hosted image should be here but it was not working when we last tested it.
It says the output stage current source is no longer an "Aleph" current source, but a version of the classic "Mu Follower".
But the simplified schematic of Firstwatt J2 shown just a basic circuit of SRPP(Shunt Regulate Push-Pull).
Since it claimed to be a Mu Follower,
I suppose the simplified schematic of Firstwatt J2 should be just like this.
An externally hosted image should be here but it was not working when we last tested it.
At first, I guest the regulator IC in the schematic is TL431.
Then the voltage drop of those two resistors will be 2.5V, it seems too high.
So, I guest the regulator IC in the schematic is LM385.
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That will work, but it is not the J2 voltage source. I am not
planning on making the circuit details public, so I suggest
that you just pick a nice voltage source and go with it.
Yeah, I knew that will work.
But if I announce this schematic not you,
I think no one will have interest in it.
So sad!
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be brave .... and confident
about lack of attention to your thread -
greedy boyz like to have Papa's blessing for their usual hysteria
Maybe I am one of the greedy, too.
.....I am not
planning on making the circuit details public, so .......
Serious? Not even after hitting your quotas? hmm... guess I took it for granted but well... lets see how near we can get to the real J2...
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