Forums - Space Tech Lab Super Tube Rectifier Arrived!

Adamaley

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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #650 - 11/23/25 at 16:26:35

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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.

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CAJames

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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #651 - 11/23/25 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.

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Campo007 Verified Member Offline Posts: 10	Re: Space Tech Lab Super Tube Rectifier Arrived! Reply #652 - 11/25/25 at 19:31:27 Has anyone tried the Cryotone 845?
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Adamaley

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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #653 - 11/25/25 at 19:38:12

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Posted by: CAJames Posted on: 11/23/25 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.

Thanks. This really helps. Since I am using headphones, I love the feeling of getting lost in huge images with an expansive soundstage - it is something the Linlai 845 does even better than the RCA 845 - so losing that to any degree as a tradeoff for other technicalities sucks. As always, everything is a balancing act.

Quote:

Posted by: Campo007 Posted on: Today at 19:31:27
Has anyone tried the Cryotone 845?

I haven't.

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Lampi Pacific DAC(STL STR-1002) Misho Wooden Preamp(STL STR-1002))
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(Wyetech Labs Ruby XR300B Monoblocks/Zynsonix Adapter/Hifiman Susvara OG)

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HockessinKid Seasoned Member Online Posts: 1341 Delaware	Re: Space Tech Lab Super Tube Rectifier Arrived! Reply #654 - 11/30/25 at 23:05:17 The graphene Sluggo arrived yesterday and is in the STR-1002 Super. There you go Lon😉. HK
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CAJames

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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #655 - 01/18/26 at 20:51:42

Here is something potentially interesting I'll call STRish:

https://www.aliexpress.us/item/3256808922410755.html

It isn't an STR, which will adapt triodes, or full wave rectifiers or half wave rectifiers to do the rectification and it isn't a DTR that uses solid state rectification with a tube regulator. It uses one or more 5V rectifiers to do the rectification in parallel which apparently gets you higher current and at the least removes the rectifier current and heat from your amp. I don't think it is for me, but someone else might be interested. Esp. if they have a large collection of rectifiers they could mix and match.

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Kahuna Jack Seasoned Member Offline Posts: 251	Re: Space Tech Lab Super Tube Rectifier Arrived! Reply #656 - 01/18/26 at 22:45:38 That company has a few different variations with another using a pair of 805/845's . If I run out of things to spend $$ on I might buy one just for another tool in the chest. So much cool stuff, so little money and time LOL
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__Jon__ Verified Member Offline Posts: 40	Re: Space Tech Lab Super Tube Rectifier Arrived! Reply #657 - 03/03/26 at 00:55:55 This thread has me excited. I have a bunch of 866a rectifiers that I've been wanting to find a way to use. Sounds like people are having good experiences.
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__Jon__

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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #658 - 03/03/26 at 18:30:43

I'm planning to try with the STR-104-Mk2-Super-DUAL, as I would like to be able to use 2.5 V and 5 V tubes (without needing the double tube adapters for the 866a tubes), and I like that it works with two pieces of equipment.

Anyone who has both the STR 104 and either the STR-1002 or STR-1004, notice any difference in using the same tubes between these?

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CAJames

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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #659 - 03/04/26 at 00:33:01

Since the only thing the STR does is heat up the tubes I'd be surprised if there was much if any difference between using the same tubes in either. Probably the adapter is as big a factor as anything. If you are only, or mostly, interested in the 866A then by all mean get the 104. But if it were me I would not want to be without the option of the big 4 pin triodes and high powered rectifiers like the 872A/4B32. Also, FWIW, antidotally it seems like the quality control issues are more common with the 104 than the 1002. Either way a lot of us found the STR to be transformative.

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__Jon__ Verified Member Offline Posts: 40	Re: Space Tech Lab Super Tube Rectifier Arrived! Reply #660 - 03/04/26 at 07:00:37 Thanks. I think I'll start with the 104 at least. I have boxes of 2.5 v and 5 v rectifiers I've accumulated to try. I'm going to use it for headphones initially, but may switch it once I get the monoblocks. Using ZMA currently. Will post once I have some impressions.
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Campo007 Verified Member Offline Posts: 10	Re: Space Tech Lab Super Tube Rectifier Arrived! Reply #661 - Yesterday at 11:52:52 I recently received the JYL Jinyinlai WE9845's. I've had these running now for 2 weeks and can say, these are the best 845's i've had. Easliy bettered the LinLai E845, the ShuGuang Natural T and the stock Psvane i recieved with the STR. I haven't tried the spendy Elrog's - but would love to one day.
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GroovySauce Seasoned Member Online Posts: 929 East Tennessee	Re: Space Tech Lab Super Tube Rectifier Arrived! Reply #662 - Yesterday at 12:14:58 I really haven’t heard anyone discussing the JYL tubes. What is the sound character? How are they different from the Linlai E845 and Natural Sound 845-T?
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Campo007

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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #663 - Yesterday at 12:20:13

I found the LinLai E845's very "HIFI" sounding. I liked the Natural T's much more. Heap more meat on the bones and more fun. The JYL's have the meat and fun factor of the Natural T's, but give me more detail in the midrange. It's like i can hear into the recording more, more room sound, more space, more depth.

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GroovySauce

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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #664 - Yesterday at 14:27:33

How many hours did you have on the E845s? What do you consider the HiFi sound? I found the E845s to very very light and delicate an ephemeral sound. I think especially with the STR 100+ hours minimum maybe closer to 200 for them to fully settle.

I have the same report for the Natural Sound 845-T

You are selling me on the JYL. Once I get the 845 amps I might end up giving the JYl a spin.

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CAJames

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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #665 - Yesterday at 16:32:13

Very interesting. I'd never heard of JYL either, apparently another Shuguang alumni. I have no business buying more tubes for my STR, but it is always nice to have options. And I agree with Groovy, it takes over 100 hours before you get the "final answer" sound from these tubes.

FWIW, the Elrog 845s are fabulous. No way would I have paid for new, but I lucked into a used pair. However, I've found that I like the 4B32 tube, a 5V Xenon rectifier, even better. Actually I'm using one Elrog 845 and one 4B32.

Please keep us posted as your journey continues.

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Hearafter Seasoned Member Online “In Tubes We Trust” Posts: 369 SF Bay Area	Re: Space Tech Lab Super Tube Rectifier Arrived! Reply #666 - Yesterday at 19:13:09 Interesting indeed. 🤔 about possibly upgrading my stock DGR tube Camp007 Where did you buy the JYL WE845 from and their cost? Also noticed they make a 845+ version thats looks like their entry level 845.
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Campo007

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Re: Space Tech Lab Super Tube Rectifier Arrived!
Reply #667 - Today at 00:12:37

I had at least 300-400 hours on the E845's. Possibly more. A good 4-6 months of 2-4 hours a day. What i mean by a hifi sound, is that they had great top end and great bottom end, but lacked some timbre. This is where the Natural T was better for me.

I'd never heard of JYL either until a mate of mine bought a pair of their mess 300B's. He raved about them. He liked them more than the Stradi 300B. So from there i though i'd give them a go.

I bought these: https://www.jyltube.com/en/product-2/jyl-we9845/

They have a few different types.

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GroovySauce Seasoned Member Online Posts: 929 East Tennessee	Re: Space Tech Lab Super Tube Rectifier Arrived! Reply #668 - Today at 18:10:33 Quote: What i mean by a hifi sound, is that they had great top end and great bottom end, but lacked some timbre. I get what you mean, thank you.
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