[Designsfx]

Yup, I’ll check with the engineer before plugging anything new, but given the bounds of 6J5 (0.3A) to KT150 (2.0A) per socket, there is a definitely huge range of possibility from extrapolating the bias used from the 6J5

Nevertheless, better safe than sorry - best to double check with the engineer, and minimally I'll probably aim for things that can take 6V6 bias and cap out at the F2A11 as my maximum bound

Check the WBF TRP Tube Rolling thread, one of the guys I recommended 6J5’s to ran a TRP2 and had no issues at all. He other triodes as well and I think settled in 7193’s prior to purchasing a Poseidon. I’m not sure if he kept the TRP but none the less he had no issues. The only issues I’ve heard of so far surrounding the use of 4V rectifiers and adapters. A recent case occurred with one of our friends who had to have his dac returned to Poland for repair over a transformer issue. I don’t know what the final verdict was on the cause of failure- bad tranny or shorted tube/bad adapter.

 

[headphonefranz]

Blast from the past. I wanted to 'up' my DAC experience and found a Lampizator for sale (locally) - a rare event.

2 weeks into the experience - I can report complete satisfaction - a wonderful sound - impact on the chain and music listening experience.

 

[FLXI]

What are you’re favourite tubes for getting more pronounced bass? I’m using the Baltic 4 and just switched from ecc40 to 12bh7, a couple of old rca, and think there is much more authority in this tube at the expense of some air maybe..

New produktion rectifiers also seem to be more bass heavy?

 

[Elect37]

New to the Hobby
can someone explain in detail on the Poseidon DAC

What does the Rectifier tube do?
what do the Octal tubes do?
What do the Novak tubes do?

Thank you!!!!

 

[Polygonhell]

New to the Hobby
can someone explain in detail on the Poseidon DAC

What does the Rectifier tube do?
what do the Octal tubes do?
What do the Novak tubes do?

Thank you!!!!

As I understand the lampizator circuit based entirely on Lucas’ older postings, and various discussions (I’ve never reverse engineered one).
It’s basically a variation of an assymetric SRPP with the Noval tubes provide the anode load (it’s not quite this simple, but they are basically a constant current source and provide some buffering) to the Octal tubes that should be providing the primary gain/color. That’s not to say the Noval tube choice doesn’t change the sound it does, how stiff the CCS is varies based on the gain of the tube.
The Rectifier does exactly what it says on the tin, it’s 2 diodes used to rectify the incoming AC.
Unlike SS rectifiers Tube rectifiers have a significant voltage drop, and it varies a lot by tube type, and load so when you swap rectifier types you probably changing the actual B+voltage by 20-40V possibly more in some cases, so they can have a significant effect on the overall presentation.

 

[Elect37]

As I understand the lampizator circuit based entirely on Lucas’ older postings, and various discussions (I’ve never reverse engineered one).
It’s basically a variation of an assymetric SRPP with the Noval tubes provide the anode load (it’s not quite this simple, but they are basically a constant current source and provide some buffering) to the Octal tubes that should be providing the primary gain/color. That’s not to say the Noval tube choice doesn’t change the sound it does, how stiff the CCS is varies based on the gain of the tube.
The Rectifier does exactly what it says on the tin, it’s 2 diodes used to rectify the incoming AC.
Unlike SS rectifiers Tube rectifiers have a significant voltage drop, and it varies a lot by tube type, and load so when you swap rectifier types you probably changing the actual B+voltage by 20-40V possibly more in some cases, so they can have a significant effect on the overall presentation.

Ok that’s a lot for me Lol I was hoping for like a 3rd grade level of an explanation
But thank you very much!
So in your opinion
question
I am not using the preamp portion of the
Poseidon (right now at least) but is there an order of greater importance in tube rolling that I should start with? The rectifier.?
Should they all be done at the same time because they are dependent on one another?
If I’m not using the preamp right now, are there specific tubes that I could ignore because I’m not using them?

 

[Polygonhell]

is there an order of greater importance in tube rolling that I should start with?

The lampizator stock tubes tend to be quite good, with the exception IMO the short period they shipped 300B’s with the Pacifics.
I don’t have a Poseidon, so I can’t comment of specific options.
My recommendation is find a rectifier you like or pick a couple of power tubes at either end of the spectrum KT150’s are going to a lot more linear that most Octal tubes and be very different to say a KT66 or an EL34, so you have a better idea what the rolls do.
The Noval tubes do make a difference, but it’s more subtle at least on the Pacific.

If I’m not using the preamp right now, are there specific tubes that I could ignore because I’m not using them?

Not familiar enough with the specifics of the preamp in the Poseidon, but the ones in the other lampizators are “passive”, so no tubes in that circuit.

 

[Elect37]

The lampizator stock tubes tend to be quite good, with the exception IMO the short period they shipped 300B’s with the Pacifics.
I don’t have a Poseidon, so I can’t comment of specific options.
My recommendation is find a regulator you like or pick a couple of power tubes at either end of the spectrum KT150’s are going to a lot more linear that most Octal tubes and be very different to say a KT66 or an EL34, so you have a better idea what the rolls do.
The Noval tubes do make a difference, but it’s more subtle at least on the Pacific.



Not familiar enough with the specifics of the preamp in the Poseidon, but the ones in the other lampizators are “passive”, so no tubes in that circuit.

when you say regulator, Is that the rectifier tube?

 

[Polygonhell]

when you say regulator, Is that the rectifier tube?

Yes sorry rectifier

 

[Elect37]

Yes sorry rectifier

Thank you

 

[Nimzerz]

Quick little review on the Siemens F2a to El34 adapter from Takasz & Pinter:

Laszlo, AKA @takacs75 was kind enough to QUICKLY send me a pair of adapters for my Lampizator Golden Atlantic TRP after reaching out to him with an inquiry about them. After letting these break in (they went through a set of tonal changes similar to a brand new set of tubes or capacitors) and adjusting to their sound, I did a quick swap with the old pair of adapters I was using (the ones often suggested on ebay).

The most immediate thing noticeable to me when I first installed the new adapters and that has remained an improvement after break-in is a more robust foundation to the bass. While I felt that my original adapters rendered bass very well, the TP adapters simply have more heft and extend deeper with more texture. For example, the bass in Erykah Badu's song Didn't Cha Know feels more fleshed out and the fundamental is much more present/balanced with the harmonics.

Vocals sound more natural. Initially, when swapping to my old adapters, I thought that there was more clarity, better attack, and better imaging. This was an illusion as a result of a tonal shift towards the upper mids/treble. I'm sure most of you know what I mean here, that false sense of resolution due to the sound becoming harmonically "thin" and lacking body. I am happy to say that these adapters elevate the Lampizator's rendition of all instruments--they simply sound much more natural.

I think a great summary of the improvements would be that there is more body, more weight, a blacker background, and overall better timbre throughout the entire frequency range.

I highly recommend everyone to give these a shot, they are the real deal. Another plus is that they look fantastic:

 

[FLXI]

My EML 274b tube finally had some burn-in time and it actually sounds really really good! I would say one of my best rectifiers so far. I have compared it with Sofia 274B, GEC U52, 596 USAF, Brimar and Valvo 1064, Telefunken 1064.

The EML has richness, sweetness and openness, grate 3d an holographics, not far behind Valvo and GEC but it adds a stronger and more controlled bass foundation. I still prefer Valvo and gec for jazz but as an allrounder, I can really recommend EML!

 

[highstream]

My EML 24B tube finally had some burn-in time and it actually sounds really really good! I would say one of my best rectifiers so far. I have compared it with Sofia 274B, GEC U52, 596 USAF, Brimar and Valvo 1064, Telefunken 1064.

The EML has richness, sweetness and openness, grate 3d an holographics, not far behind Valvo and GEC but it adds a stronger and more controlled bass foundation. I still prefer Valvo and gec for jazz but as an allrounder, I can really recommend EML!

Looking at the EML site and their US distributor, TubesUSA, I don't see an EML 24, B or otherwise. Nor a 248.

 

[Nimzerz]

Looking at the EML site and their US distributor, TubesUSA, I don't see an EML 24, B or otherwise. Nor a 248.

Likely a typo, think they meant 274B

 

[FLXI]

Yes I did thanks!