It is the corresponding circuit to the tube (Electra) version and to the JFET version but this time with a bipolar transistor.
The headphone is the collector resistor itself.
So for stereo we just need 2 transistors for the simplest signal path.
One resistor form the collector terminal to the base is for biasing.
Everything is in Class A (electrons flowing all the time even through the headphones themselves).
Germanium transistors sound very nice, is this due to the higher mobility of electrons?
One can experiment with OC series germanium bipolar transistors, OC58, OC71, OC72...
Silicon transistors should sound very nice too.
Sound is big, detailed and amazing. Deep bass!
We must protect our ears when listening through headphones, levels must be low.
Reference:
Transistor Audio Amplifier Manual - Clive Sinclair - Bernard's Radio Manuals, Bernards Publishers LTD, London, first published 1962 -reprinted November 1977 - pages 5-7
The headphone is the collector resistor itself.
So for stereo we just need 2 transistors for the simplest signal path.
One resistor form the collector terminal to the base is for biasing.
Everything is in Class A (electrons flowing all the time even through the headphones themselves).
Germanium transistors sound very nice, is this due to the higher mobility of electrons?
One can experiment with OC series germanium bipolar transistors, OC58, OC71, OC72...
Silicon transistors should sound very nice too.
Sound is big, detailed and amazing. Deep bass!
We must protect our ears when listening through headphones, levels must be low.
Reference:
Transistor Audio Amplifier Manual - Clive Sinclair - Bernard's Radio Manuals, Bernards Publishers LTD, London, first published 1962 -reprinted November 1977 - pages 5-7
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