D-LA2A Support Thread

[FarisElek]

My meters are 1db off from each other when in +4db mode. Does anyone have any clues to what may cause that?

Ryan

 

[wlinart]

Since the 12ax7 are getting more expensive, i'm looking at the 6n2p tubes as alternatives maybe. But the pinout is different. I found this picture. Am i right in thinking that for the D-la2a i'd have to:
- cut the trace between pin 4 and 5
- rewire the heaters to pin 4 and 5, and connect pin 4 with the other tubes' pin 4, and pin 5 with the other pin 5 and pin 9 of the 12bh7 and 6AQ5
- rewire 9 to ground
I'm not sure of the last step, is it necessary? And where can i easily connect to ground? I was thinking maybe at the ground pins from c171/172/173/174, because those are closeby. Any advice?

 

[shoetique]

I've put together a video that showcases my [silent:arts] D-LA2A build. The video covers LA-2As in general, my build notes, various upgrades and the calibration procedure. There are even some clips of the unit in action!

Thanks so much to everyone in this thread. Your insights and knowledge have been invaluable.