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11/24/25 at 04:13:54

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Space Tech Lab Super Tube Rectifier Arrived! (Read 200421 times)

Adamaley

Senior Member

Posts: 53

Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #650 - Yesterday at 16:26:35

Quote:

Posted by: CAJames Posted on: Today at 15:15:56
I noticed no meaningful volume difference between the 211 and 805 or 845 in my non-Decware preamp.

FWIW I tried to power a UFO25 with pairs of all of those DHTs: 211, 805 and 845 and none of them worked. AL said it was because the internal impedance of the tubes was too high. To me it seems like the voltage drop you get using triodes as diodes like in the STR is more a function of the load than a characteristic of the tube. But JMO and all that.

Thanks for this info. All one can do is compile experiences to gauge what the resultant volume levels will be. I'll be using the RS237 mostly in the STR rectifying my Lampizator DAC, so was hoping folks that have Lampi DACs night chime in.

Bluetti AC200P - Veridion Power Strip & PCs(Taiko Extreme Server
Lampi Pacific DAC(STL STR-1002) Misho Wooden Preamp(STL STR-1002))
Ecoflow Deltra Pro Ultra - Veridion Power Strip & PCs
(Wyetech Labs Ruby XR300B Monoblocks/Zynsonix Adapter/Hifiman Susvara OG)

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CAJames

Seasoned Member

"I've run every
red light on memory
lane."

Posts: 2904

Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #651 - Yesterday at 17:32:20

So I went back and reread my old posts and kinda refreshed my memory on the DHTs. This is my TL;DR

845 was very linear with excellent soundstage.

805 was more dynamic and emphasized the lower frequencies.

211 was very transparent and linear but somewhat compressed soundstage relative to the others.

But my biggest takeaway is the difference between all of the bargain Chinese tubes and any of the USA/Elrog tubes is much bigger than the difference between the tubes themselves. I'll admit to being prejudiced against current production anyway, and I have no clue where the fancier Chinese tubes would fall, but that's what I've got.

[Volumio | Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia
Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Mapletree Phono 3E
STR-1002 -> Woo WA22 -> 2x UFO25s, balanced monos
Omega SAM , Hifiman Arya, Audeze LCD-XC

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