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Could very well be but the MLER points specifically to the stators, multi layer electrode rigid, if I remember correctly.

i use 4 of this one https://www.lcsc.com/product-detail/C5279972.html DEXU Electronics B1212LS-1WR3 it's something like galvanic isolation

those are not isolated. at least they sure look non isolated. how you put them in series with common power supply input.

https://www.ebay.com/itm/275736642694 its max MAX1771 12v to 150-220v DC it can be ajusted i set 200v and just connected it 200+200 for +400 and 200+200 for -400 I read a similar problem about noise here but I couldn't find a solution. Well, unfortunately, I don't have a thermometer or pyrometer, but it feels like it's probably about 45 degrees Celsius or so - maybe more/less, It dissipates pretty well.

links for those power modules please. how warm does the chassis heatsink get? edit: what is the total power input that runs the switchers?

Hi Kevin. Thanks for your reply. The boards are sandwiched together with a thermally conductive material and a bunch of thermal paste between the housings. I couldn't figure out an easy way to get inside without breaking everything. I'm hoping the problem is still in the power supply, since you're right—it was heating up. The diodes were burning out frequently, then the transistor itself, and then possibly the transformer itself—its resistance is now 0.1 ohms on the primary winding and 4 ohms on both secondaries. I'm not sure if that's normal. It's been working without any problems on a third-party power supply for half an hour now. I'll continue testing. I couldn't think of anything simpler or better than connecting 4 of these modules to get +-400v To my surprise, these modules produce even more than 10mA and +-400v But they have one major drawback: noise. The throttles in them make noise.

the power supply shown is definitely a flyback single ended switcher. which means the 2 rectifier diodes see twice the power than a push pull switcher would generate. which means its going to get hot. diodes need to be increased in power handling. would like to see a real picture of the amp board in as high resolution as possible.

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.

Thanks for your message. Then I'll try building a cheap power supply with 4 DC-DC converters (i have some for 200V) and test its stability when running 24/7. And only if it runs 24/7 will I order those power supplies. They're quite expensive at $25 each, and i need two of them, which means $50 plus bias.

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.

Sorry if I posted this in the wrong thread. But it seems like this is also a clone of this amplifier. You're talking about the amplifier board itself overheating, right? That is, the resistors on it are drifting and therefore i need to be replaced with ones with greater thermal stability... This is where the power supply failed, and I've already ordered the DC-DC converter that Kevin recommended. I hope everything works reliably after installing them. I initially thought that the problem with this thing was in the power supply, but now I realized that it’s not that simple...

Yes, but they say in the ad that the sound is different. Maybe the membrane is different? The 007 mk1 and mk2 are almost identical in appearance. But the sound is very different. Maybe it's the same story here.

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! 😁

Now I understand the 6th floor joke elsewhere

I'm calling BS on it being any different, at least from the pics I've seen so far. The housing clearly is but that has minimal effect on the sound.

I'm more interested in the difference between the MLER 3 and the MLER2, since the stator shape, judging by the photo, is the same.

Well congrats Steve! That is effing amazing! Sooo... moar cool/inspiring pics coming soon at woodworkers sub-forum hopefully.

Took down the stream as I mostly meandered due to exhaustion. I'll pick a better night when I actually have energy.

Necro-ing this because I needed something to listen to and this seemed as good a thread as any to find a good album. It is interesting how little my tastes have changed in the 12 years since I posted here. I'd still have 3 of my 5, easily. Sub the White Album and Joshua Tree in for Stevie and Miles and I'm basically in the same ballpark I always was.

Well, nothing has happened yet except a phone call from another Contractor. But I'm excited just to meet her. I watched her documentary a little while back and was even more intrigued with her life than previously. I'd be extremely honored to build anything for her, but there are some time hurdles to jump over before anything is going to happen. Still, I can't imagine not jumping a few hurdles to make this happen.

Went to hear Wynton tonite .. spotted Paul Simon in the crowd

Does that lift the veil? 🙃

Ok guys, I'm streaming. Come and hang. I can show you my new nerdy hobby and we can chat audio and music. I haven't figured out how to strip my music from my recordings yet (it's not hard, but no time), but I can always just play stuff and take the VOD down, I record it simultaneously locally as well anyway. Or maybe you'll just be soothed by the sound of my Bob Ross-esque voice? Seriously though, two people have independently compared me to Bob Ross. I can't say he's an influence, but maybe a kindred spirit? https://www.twitch.tv/philodox42

You're making my career feel wholey inadequate. Nice work buddy!

Damn, Steve. That is cool as hell.