That is correct, the dimensioning shows the 25W version.
The concept of the hybrid amplifier was to couple a cascode with a white cathode follower as the first stage directly to the MOS-FET output stage. Two PCC88 triodes would be used as tubes.
The quiescent current should be set to <300mA per pair, including the balancing of the floating circuit - P1 and P2.
I wonder, among other things, whether the setting was stable over the long term.
The "Musikus ST265"
Four years later,
Edmund Wincek presented his own version of a HYP-End, also with a PCC88, in Elektor magazine. The first stage here consists of a single double triode in SRPP configuration.
This power amplifier design (and dimensioning) is specified as a 65W version into 4 ohms, with a damping factor of 3.2!
#
The minimal two-stage, mixed concept somehow has a charm all of its own, but is the DF specification correct?
Four years later,
Edmund Wincek presented his own version of a HYP-End, also with a PCC88, in Elektor magazine. The first stage here consists of a single double triode in SRPP configuration.
This power amplifier design (and dimensioning) is specified as a 65W version into 4 ohms, with a damping factor of 3.2!
#
The minimal two-stage, mixed concept somehow has a charm all of its own, but is the DF specification correct?
