Preamp schematic check [message #80774] |
Fri, 31 October 2014 18:23 ![Go to next message Go to next message](/forum/theme/AudioRoundTable/images/down.png) |
Shane
Messages: 1117 Registered: May 2009
|
Illuminati (3rd Degree) |
|
|
I found a preamp that I'm thinking of building because I have a stack of 6SN7's and VR tubes. No better reason right?
Anyway, it's a BEZ Q4B preamp that comes from China, point to point wiring handbuilt by the designer, and has gotten some pretty good reviews from the people who have bought it over the last 10-12 years. It's simple, I can kinda follow a schematic, but I always layout a wiring diagram to help me visualize. Actual layout I can do, just the wiring bit helps me not screw up. So here's a few photos of one of the preamps, it's innards I could find, the schematic, and my little diagram. IF anybody has the time to check my wiring diagram I'd appreciate it.
![index.php?t=getfile&id=1579&private=0](index.php?t=getfile&id=1579&private=0)
![index.php?t=getfile&id=1580&private=0](index.php?t=getfile&id=1580&private=0)
![index.php?t=getfile&id=1581&private=0](index.php?t=getfile&id=1581&private=0)
|
|
|
|
|
|
Re: Preamp schematic check [message #88482 is a reply to message #88478] |
Sat, 21 July 2018 17:26 ![Go to previous message Go to previous message](/forum/theme/AudioRoundTable/images/up.png) |
![](/forum/images/custom_avatars/3806.jpg) |
gofar99
Messages: 1939 Registered: May 2010 Location: Southern Arizona
|
Illuminati (5th Degree) |
|
|
Hi, I design all my schematics, layouts and final projects. A preamp raises the signal level from a source, like a CD player to a level sufficient for the power amps. It acts as a way to control the volume and selects the input source. Some include other features such as phonograph gain and equalization and headphone outputs. The one in the originally posted question has neither nor does the one I posted. There is a class of devices that incorporate the preamp and power amp functions in one unit. Usually called an integrated amplifier. It is convenient for the user, but not as flexible for enthusiasts.
Good Listening
Bruce
|
|
|