What do you all think of this console?

[fazeka]

Am wondering what y'all think of these boards?

Here are some schems that might give an idea to its design.

http://bolstad.net/quantum/Quantum%20QM-168%20Manual.pdf
http://bolstad.net/quantum/QM-168%20schematic%201010%20card.jpg
http://bolstad.net/quantum/QM-168%20schematic%20buss%20outputs.jpg
http://bolstad.net/quantum/QM-168%20schematic%20echo%20and%20phono%20busses.jpg
http://bolstad.net/quantum/QM-168%20schematic%20input.jpg
http://bolstad.net/quantum/QM-168%20schematic%20monitor%20circuit%20card.jpg
http://bolstad.net/quantum/QM-168%20schematic%20monitor%20panel.jpg
http://bolstad.net/quantum/QM-168%20schematic%20power%20supply.jpg

What do you think?

 

[Brizco]

very nice board!

but if you didnt use it since november, you dont really need it, right?
if the price is right, sell it

 

[jrmintz]

It's not discrete, right? What kind of chips are in it?

 

[pstamler]

If it's like the one I worked on in the 1970s, LM318 opamp in the input circuit (!), 4156 quad in the EQ sections, and I forget what else. The output amp had a couple of extra transistors inside the loop to beef it up.

All opamps were socketed, nice if you wanted to mess around. I replaced the 4156s with TL075s (hard to find these days), and it improved the sound a lot.

Nice board. The output was unbalanced (or maybe impedance balanced), though, and Pin 3 was hot. Their 1980s boards were even nicer, really good-sounding, and fully balanced-and-floating outputs.

Peace,
Paul

 

[Guest]

At least, it has good construction, knobs, holes for pots, meters, sockets, probably good mic transformers, lot of pots and switches may be good...

Nice foundation for a very good project! :thumb: