Wayne's BA 2018 linestage

Hi JT!
Muses 72320.
Pros- Amazing sound (I only compared mine to a DACT 50k)! LED display. Remote control function for volume +- and mute. Some designs incorporate balance function via remote control as well.
Cons - Needs an additional +-15 V supply. Also, if you want to have a display (Adafruit etc.), another additional supply (5V) is preferred. Occupies more real state inside the preamp front plate and perimeter. Needs a few hours of continuous play before it opens up and really shine. Requires small pin SMD soldering (much smaller than the BA18 component) for the volume chip.

IMG_1765.jpeg


IMG_1768.jpeg


IMG_1767.jpeg


meldano, a member, sells the boards at Swap Meet and the discussion thread is also there. I bought mine from him.

Abe
 
Last edited:
Thanks guys... am working an idea.

@ Flame I used something like that for my mono builds, it was from Mouser and much more money, but better rated. You can buy the DC supply there as well. The DC simply runs the LED and has no interaction with the circuit for mains switching . You pull the mains into the supply and it outputs the DC voltage needed. Make sure you do the match and add the dropping resistor, or you will cook the LED.
 
The mezmerize has 12v dc out so I was going to use that for the LED in the switch and for the relay.
The light is LED portion is good for 12 volts I even tested it so this seams like an easy way to not have AC and DC through the switch.
Will look into options from Mouser

Thanks
 
It's not in the same switch F... It's two switches, one snaps on the back of the other and the AC and DC have their own switched, those no change of a switch issue dumping mains on the DC side.


That is at least the one from Mouser, but your version is much cheaper... if it works out well let me know for future builds. 🙂

JT
 
Put the covers on the build today... Don't care much for the face plate, I guess I need to have them re-anodized, but it probably won't happen. I'm very pleased with the sound driving an MX2 with Pass original design.

The switch on the front is a dummy the supply is below with two VRDNs driving a full mono design, and 2 umbilicals delivering 18v +- t


Back to the Badger build now... 🙂
 

Attachments

  • 20201223_121617.jpg
    20201223_121617.jpg
    678.2 KB · Views: 808
Last edited:
Folks, I'm looking to build this and power it the the Jung Superregulator. What is the optimal voltage? Do I need both pos and neg rails of the Superregulator? If only positive is used, can I modify the other (neg) side of the board for dual mono? (my answer seems to be here: Super Regulator) For the Superregulator, what should the resistor values be (R13,R14) to get the desired output voltage. Thanks! I need a little hand holding on this one. I've read the original article and the guide on customizing voltages and it's not clicking for me.
 
Last edited:
First post on here... I have always wanted to get a PCB manufactured but I have little confidence in my ability to make a successful layout. I have done my best at laying out Wayne's schematic with included power supply. I attached a screenshot as well as a .zip file with KiCAD project. Please give any thoughts and/or advice on improving this before I send it off to be manufactured. Thank you in advance!
 

Attachments