Thanks Max
So at this point just wondering how much different? and would it (for me) be different in a good way..
BTW.. In class AB2 that amp is pushing closer to 400w..SICK!!!
I am loving it!
Jelle
What about it are you loving?..
All The Best!
Tony
" The psychics on my bench is the same as Dumble'"
talbany wrote:So at this point just wondering how much different?
Do you remember what Brandon posted concerning the more general differences between the circuits of the different "generations" of SSSs and concerning the differences between his "EJ-version" of his HPD and his "SRV-version" of his HPD?
If so:
AFAIR the general topology of the preamp of this 300SL is more similar to the preamp of what Brandon called the "later" 150W SSSs, than to what Brandon called the "early" SSSs (like #002 e. g.).
And - if I don't mix up everything right now - the general structure of the PI>driver stage of this 300SL is more similar to the PI>driver stage of the SRV(Dumbleland)-version of the HPD (or 150W SSS,) than to the EJ-version of the HPD (or 150W SSS).
talbany wrote:
Jelle
What about it are you loving?..
All The Best!
Tony
The cryptic nature of the description given by Max. I do not mind, in fact, I understand why. It is just amusing me. Never mind me...
BTW, I see two tall tube sockets: if I were to venture a guess, I would say that these are two paralel 12BH7 cathode follower drivers to maintain sufficient current supply into those 6550s.
Also, that row of preamp tubes at the front panel side, is that two or three tubes? I think that one on the left is a silver cap can. Anyone?
jelle wrote:BTW, I see two tall tube sockets: if I were to venture a guess, I would say that these are two paralel 12BH7 cathode follower drivers to maintain sufficient current supply into those 6550s.
Also, that row of preamp tubes at the front panel side, is that two or three tubes? I think that one on the left is a silver cap can. Anyone?
Perhaps you can draw some conclusions concerning these pictures by looking at the attached data sheet of a DL 300SL and comparing it with the data sheet of a SSS 150W (posted above in a previous post) and comparing both with your own ("by Welagen") version of a 150W SSS?
BTW: AFAIR what Brandon posted concerning this topic, the structure of the PI>driver circuit of a Dumbleland Special 150W and the "SRV-version" of a SSS 150W is different from at least some PI>driver circuits of at least some SSS 100W and 150W.
Cheers,
Max
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Last edited by Max on Mon Jul 28, 2014 6:42 pm, edited 1 time in total.
Max
Somewhere I have the info Brandon mentions but if memory serves the main differences being the DL being a 12BH7/7025 combo and the SSS being (predominantly)7025/7025..AFAIK the circuits would be very similar and are interchangeable with balance and re-bias so this should go under tube compliment correct?..You are correct they do change the sound and feel!
IMO there are probably several ways to source grid current and drive the grids..Pick your tube and they all yield basically the same result..Class AB2 (it's not like a reverb or tone stack circuit)
Also Dumble used more feedback loops in the earlier designs and of coarse ran his 6550's at around 500V vs 450 in the 6L version..Is this what you are referring too?
I guess I am looking at it in a more broader aspect..
Does this make any sense?
Thanks again
Tony
Last edited by talbany on Mon Jul 28, 2014 8:28 pm, edited 3 times in total.
" The psychics on my bench is the same as Dumble'"
