John Curl's Blowtorch preamplifier part II

[stinius]

Originally Posted by john curl

Stinius, please check out Charles Hansen's original line preamp schematics. It is inappropriate to add a buffer on a BLOWTORCH design, as it would be to add two cylinders to a Porsche Boxster. It would work, but it is not part of the design exercise. Too many parts in the audio path.

John
It was not meant as a copy of Charles line amp, but as a circuit for discussion, based on a buffered OPS and VGT volume control

Joshoua
everything. (BH)(SA)

Cheers

[john curl]

It should have a separate thread, because it is too close to Charles' original design, and deviates from the direction that the Blowtorch took. However, it is a good approach, and I will be using a similar approach in 2 future designs, if they go forward. In my case, it is because the requirements necessitated an output buffer, and it could not be avoided. Still, the single load on the drive stage is compromised by going through the voltage sources. I recommend changing it.

[stinius]

Originally Posted by john curl

Still, the single load on the drive stage is compromised by going through the voltage sources. I recommend changing it.

Agree, but the circuit I posted was meant as an example to explain and discuss the technical approach, it was not meant to be a final circuit.

Cheers

[stinius]

May I ask who is deleting my posts and leaves Joshoua-G’s posts?
What’s going on?
If this is the trend of the forum, I will not post anymore, but leave the forum to Joshua, Federmann, Iko, spambot and others.

Cheers

[ikoflexer]

Originally Posted by stinius

May I ask who is deleting my posts and leaves Joshoua-G’s posts?
What’s going on?
If this is the trend of the forum, I will not post anymore, but leave the forum to Joshua, Federmann, Iko, spambot and others.
Cheers

Wow, thanks dude, I feel so flattered that you officially leave the forum to me and the other guys who syn08 is so happy to call them "my friends."

Take care, and don't be a stranger now.

[syn08]

Originally Posted by stinius

What’s going on?
If this is the trend of the forum, I will not post anymore

you don't get it, do you?

I just read in the cable forum that the original Edison drum sounds better than a CD, so there's nothing surprising here...

[mlloyd1]

stinius:

if this is not the right place, your schematic and subsequent discussion would be welcome in this thread i think:
Ayre's EquiLock, what is it?
btw, you are likely correct about the mirrors.

mlloyd1

[scott wurcer]

Originally Posted by mlloyd1

stinius:

if this is not the right place, your schematic and subsequent discussion would be welcome in this thread i think:
Ayre's EquiLock, what is it?
btw, you are likely correct about the mirrors.

mlloyd1

I agree, and am reconsidering ignore lists. Start a thread and talk about real circuit issues. You won't get all the free hits that JC generates, but I'm sure the net value will increase.

[john curl]

What is the point of your comment, Scott? That IC's are perfect? Or whatever. IF you can't learn from someone who knows more than you as to how to make good audio equipment, perhaps you should ignore them.

[scott wurcer]

I simply said go out of the BT thread and carry on a separate conversation. You are welcome to join. And if you want to talk about precision instrumentation there are few here that can teach me anything.