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In Reply to: Ah yes... posted by Brian Walsh on January 3, 2005 at 21:24:59:
since I am certain that they had a triode output section. PL509s could be wired in triode, but I don't think that's how they did it.
Follow Ups:
According to the Stereophile review of the Sans Pareil monoblocks in June 1992 the output tubes were 6LF6's and if I remember correctly the tubes were hooked up in pentode mode.
No argument here; the Sans Pareil used a pentode-based output stage, with 6LF6s, if you say so. I wasn't sure whether the Sans Pareil used 6LF6s or EL/PL509s, since I never laid eyes on one. Futterman himself and then Counterpoint, NYAL, and Prodigy eventually settled on the 6LF6 as the output tube of choice for Futterman-type OTLs, but in later years the 6LF6 became scarce and expensive. That's why Transcendent now uses the EL or PL509. However, Brian and I are talking about my brief experience with the Triomphe amplifier, which was a little brother to the Panthere and like the Panthere had a triode output stage. The Triomphe did not use 6C33Cs but instead used 6AS7s, as far as I can remember.
Have you seen the website of John Atwood,who apparently did some consulting on the Fourier amps? There is some info on the Fourier Sans Pareils, Triomphe,and Panthere.
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