Michelag

guess i'm trying a mix MELF/thin film

then let's find some other kind resistors 😁

Just built as per schematic, and worked straight at first attempt?

So, friends, anyone built this portable with success ?

Perhaps Better to get down go 380 the other one, no?

I guess it should be max 10mA. These bricks output max 20mA. If we take only the right or left half, the upper amp (+) draws 10mA, that are "vacuumed" by the lower PS (-400V). Then add other 10mA for the lower part, and you're at max acceptable draw. I'm testing with the 10k pot, until now it drew really more than 10mA, so the PS started "pulsing" under my dim bulb tester. I'll keep you updated.

And so, yes it is, quite unstable due to drifting. Problem is not the PS, it's that the current draw grows slowly with time, then it begins pulsating, then flames or short. I'm now assembling the stabilized version with dn2540 and pot, so that you can dial in the desired current, yet I'm having some issues with that, but as said, I started this morning (and now it's early afternoon). Who sold this unit made the error of "marketing" it too early, perhaps not testing nor listening at it. Here it's all about patience, testing, doing it better and listening. So probably a new PS will not solve the issue.

Yes, they're quiet to my ears. No noticeable noise in the cans. In the main thread, Dr. measured "ringing" at I don't know how many MHz. If you can find them, go for them. The supplier that I bought from, has them out of stock now. And yes, the difference is the input voltage. Yes, thanks, I'll see some video on YouTube and I'll become a pro! 😁

Thanks, I've already built them, Dr. sent me the file.

where?

Who helps me finding a chinese? Had a chat today with the Staxmafia boss, he didn't do the names, but indicated that some time ago, a chinese was selling this modded set with stax plug... Does someone want to be a spy? Or if you do not wanna do the name, also some hint about getting to him would be appreciated? Thanks a lot 😁

Wow! But just for my understanding, this is the limit after which damage to earspeakers can occur, right? I mean, so much power is really needed to drive the most demanding e-stats? Or is it thought as an exercise of pushing it to the boundaries ?

Thought I never shared pictures of my build, et voilà. Those 3.5 and 4.4 input connectors on the front do really a pragmatic job... I fit a normal bias plug (thanks @JoaMat) so the writing is now aged 😁

PBHV2160ZX seem to be out of stock at Mouser?

Same here, 1206 and 50ppm, but drifting