Introducing the LampizatOr Poseidon DAC
- Thread starter Lukasz "Lampizator" Fikus
- Start date
I’ve found Posseidon lean with stock tubes. With good nos tubes it is a totally different dac. Do you use F2a in your Atlantic dac?
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But how do you "know" that a given heater setting is NOT frying your precious tubes over (maybe even) a short time?
Yes, good point.
To be clear, I'm not talking about running a tube that requires a low heater setting (101d, 45, 242, PX4, etc.) on a high heater setting (300b, T100, etc), for example. I'd never do something like that. The specific change here I'm referring to, is a minor one, in this case, moving from the 45 setting up one notch to the 242 setting on a Philips PT35.
Recall, some older model Lampi DAC's only had a toggle switch with two options: High heater or Low heater. So, back in the day, most tubes were not being run at the precise, optimal setting..
With our more recent Lampi's, we have options to fine tune. But yes, one has to consider the ramifications on tube life. I guess at some level, we are burning out our tubes every time we power them on. But, these Philips PT14 and PT35 are tough little buggers.
I received it with Siemens F2A and a WE 422a for my audition. Currently have Poseidon running stock input and output with a RCA rectifier (I'll try the Western Electric in it too)
I am almost sure that F2a can’t be used in the Posseidon. As far as I know stock tubes are 0.3 A tubes, the F2a is 2A.
Yes, good point.
To be clear, I'm not talking about running a tube that requires a low heater setting (101d, 45, 242, PX4, etc.) on a high heater setting (300b, T100, etc), for example. I'd never do something like that. The specific change here I'm referring to, is a minor one, in this case, moving from the 45 setting up one notch to the 242 setting on a Philips PT35.
Recall, some older model Lampi DAC's only had a toggle switch with two options: High heater or Low heater. So, back in the day, most tubes were not being run at the precise, optimal setting..
With our more recent Lampi's, we have options to fine tune. But yes, one has to consider the ramifications on tube life. I guess at some level, we are burning out our tubes every time we power them on. But, these Philips PT14 and PT35 are tough little buggers.
I've been told by the tube masters that 242 setting is going to reduce tube life too much on PT35, so, back to the normal heater setting. Within 10% over or under the recommended setting is okay, but more than that and your tubes deteriorate rapidly.
Sorry for the detour.. back to the Poseidon discussion!
You should send a note to Lampizator on this one. Poseidons sell sheet states it will run a 5881 beam pentode but that only requires 900 ma of current each. The F2a needs 2A each. The Atlantic TRP will cope with 2A per socket but nothing higher- which is why it has its name. The Poseidon manual (sadly) states nothing about tube amperage limits.
If it’s true then all the pentodes we use in the Horizon should work with adapters. Like the 4654 or P17c.
DHT guys, respectfully, please return to your DAC threads and stop derailing this one, as was done on the TRP thread. Thank you for understanding...
I was told by the Lampi team that the F2a's will work in the Poseidon, but I only have one pair so haven't tried yet. Not sure why a different adapter is needed??? They did note that Lukas prefers to keep it under 1.8A on the output tubes.
To me, the JAN KenRad 7193 (6J5 forefather) is superior to my ears in the TRP and Poseidon over the many 6J5s and the nice L63s (G.E.C.) I have, or el34s or others. To my ears, next best are the very best 6sn7s, although the 7193s are better, being more extended top-to-bottom with the midrange magic retained, yet for 1/10th the price of a quad of the best 6sn7s.
NOS Siemens E88CCs in the input make the sound more organic, dense, and dimensional in presentation over the stock tubes that lack the "breath of life" quality that the Siemens offer. The input buffer tubes made at least as much of a difference as the output tubes, so more testing is needed here for me as I've only tried these 2 tubes here thus far.
I've not had luck bettering the supplied Sovtek 5u4G rectifier yet. The Rectifiers that worked well for the TRP (I have dozens) have not worked in the Poseidon, to my dismay...This is my first 5u4G tube, however, so maybe another select 5u4G will up the ante...?
I was told by the Lampi team that the F2a's will work in the Poseidon, but I only have one pair so haven't tried yet. Not sure why a different adapter is needed??? They did note that Lukas prefers to keep it under 1.8A on the output tubes.
To me, the JAN KenRad 7193 (6J5 forefather) is superior to my ears in the TRP and Poseidon over the many 6J5s and the nice L63s (G.E.C.) I have, or el34s or others. To my ears, next best are the very best 6sn7s, although the 7193s are better, being more extended top-to-bottom with the midrange magic retained, yet for 1/10th the price of a quad of the best 6sn7s.
NOS Siemens E88CCs in the input make the sound more organic, dense, and dimensional in presentation over the stock tubes that lack the "breath of life" quality that the Siemens offer. The input buffer tubes made at least as much of a difference as the output tubes, so more testing is needed here for me as I've only tried these 2 tubes here thus far.
I've not had luck bettering the supplied Sovtek 5u4G rectifier yet. The Rectifiers that worked well for the TRP (I have dozens) have not worked in the Poseidon, to my dismay...This is my first 5u4G tube, however, so maybe another select 5u4G will up the ante...?
Great info thank you. The adapter I have is F2a to EL34 and from reading that is different from a 6v6 pin out.
I plan to try three sets of input tubes I already have here from other gear just waiting on adapters - Telefunken G73R, Tungsram ECC40 and Philips H 7062s.
For rectifiers I use a RCA 5u4g and have a GEC U52 from a friend on the way as well as the WE 422a to try while GA3 is here.
No plan yet on output tubes so I'll look into what you recommended, finally some reasonably priced options.
The Poseidon can use the 6J5 (or equivalent) indirectly heated triodes but can also use 6V6 pentode tubes (in triode mode) due to their common base layout, without requiring the need for an adapter.
The Atlantic can use a variety of pentode tubes (in triode mode) but since these tubes also include the 6V6, it can also use the aforementioned 6J5 triodes directly (without the need for an adapter).
All differences between individual tubes, whether pentode vs triode or directly heated vs indirectly heated can of course end up to be a matter of individual preference, but particularly in Lampis the popular point that "a really good design transcends its topology" is sort of self proven...
(BTW, no affiliation whatsoever with Lampizator, just a fan...)
Ted thank you for this information on using the 6V6 tube in the Poseidon. If I understand your post correctly you are saying I can drop the 6V6 tube right into the Poseidon (in 6J5 position) without an adapter? May I ask if you confirmed that with the Lampizator team? I have some nice GEC made 6V6 tubes I would like to try but want to make sure I understand correctly that they will work before I drop them in.
Hi there,
Please see my quote below, taken from the Lampizator site (Poseidon page):
4 x 6J5 single triode as output buffer or 6V6 pentode (without adapter), also 6C2C - Bakelite or Metalbase, also L63 and CV1067
I also have quite a few of these GEC made 6V6G tubes I got from an Italian vendor many many years ago... They are fine tubes indeed!
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Thank you so much, I appreciate the website reference. I forgot to check the Lampizator Poland website for the more detailed specs.
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