2. amps-preamps
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what is your opinion ?

Hi everyone, last 18 years I've got hooked up to vintage Tube amplifiers, prior to that I was rather happy with SS muscle amps driven to my Apogee Scintilla and Duetta sig's truly open 3D soundstage Few tube amps was able accept Apogee marriage but not  as good as SS amps, until I ended up bargain priced infamous Altec's voice the theatre speakers not a wife pleaser but luckly I've  got a dedicated music room, never looked back since then ,,WE design 91 , WE46C , RIP Don Garber, even loftin White design SET amps T.Mayer Attilio Caccamo of Tektron some genious Japanese design SET Amps they all have unique presantation complimented by incredable sound of 45, 2A3, VT52,300B, E406N, even modern production Sophia 206 , and many more  ! my question is why these old school design audio sounds nearer to reality ? naturally we are all aware of room acoustics tuning our  rooms etc, etc are we listening equipment or music ? do we really need furniture grade Audio equipment ? or maybe we humans are we trying to re invent the wheel again ?
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sabih's avatar
sabih OP
40 posts
 
Hi Dan , I would love to hear  3C24 ,  it whet's my appetite unfortunately I'm on the other side the pool, I always like the sound of Triode/  transmitting triode valves I bet it sounds sublime what speakers are  you using with this amp? Any chance for photos regards.Sabih
atmasphere's avatar
atmasphere
11,834 posts
 
as far I know everything copy of copy nothing is original even in terms of Audio engineering J.Futterman came up Design of with OTL amps rather talented E.engineers improve or re create their own design
@sabih  Just FWIW, the OTL we make is not a Futterman circuit. Its entirely our own unique design for which we were awarded a patent many years ago. Also FWIW, the means of operation is actually two SET amps wired in a unique bridge configuration called a 'Circlotron'.
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islandmandan
1,260 posts
 
Sabih, you can find pictures aplenty on my Virtual Systems, under "Done For Now" titled "The Summit", which refers to my own personal summit, not some indication of where I think it places me in the vastness of systems on Audiogon, or on Earth, for that matter.

Nice talking to you, stay safe, regards,
Dan
sabih's avatar
sabih OP
40 posts
 
Hi Dan, I  fully respect what you are saying but initial invention of OTL amp as far as I  know creation of J.Futtermam, it means the wheel already has been invented ! talented guys like yourselfs improve /re create OTL Amp  Design  Such as Berning makes Delicious OTL Amps Acuhorn makes OTL Amps and many more, but I sincerely do not understand why we are discussing OTL Amps, my initial question was SET Amps and Horns and  really wanted to hear from SET Amps and horn  lovers or enthusiasts . kindest regards.Sabih
atmasphere's avatar
atmasphere
11,834 posts
 
I fully respect what you are saying but initial invention of OTL amp as far as I know creation of J.Futtermam, it means the wheel already has been invented ! talented guys like yourselfs improve /re create OTL Amp Design Such as Berning makes Delicious OTL Amps Acuhorn makes OTL Amps and many more, but I sincerely do not understand why we are discussing OTL Amps, my initial question was SET Amps and Horns and really wanted to hear from SET Amps and horn lovers or enthusiasts . kindest regards.Sabih
Actually the first OTL patents in the US preceded Futterman's patent. He did not invent the technology, he developed a means of positive feedback to help the drive of the top tube in the output section to be driven as well as the bottom one.


We got around the problem entirely by a different circuit. I got the idea during a dream back in 1976. At the time I had no idea who Futterman was.  FWIW the Berning amplifier is brilliant, but not an OTL as it has both semiconductors and an output transformer in its output section.


My last two posts here (including this one) are corrections to set the record straight. FWIW your opening post does not suggest that this thread is about SETs; it simply asks about 'old school designs' and whether we are re-inventing the wheel (the answer to the latter question is rather obviously 'no.').



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