Enclosure not stated · 2 knobs

Tycobrahe Octavia

Based on the Roger Mayer Octavia· 27 other boards clone it

Schematic

Check before you build · 1 value the reader of this schematic was not sure of

Transformer: rating text '200 400mW' unclear, likely a small 200-ohm-class audio transformer

Ref	Value	Normalized	Type	Notes
Resistors 10
×1	180k	180k		read from the schematic by eye
×1	820k	820k		read from the schematic by eye
×1	680k	680k		read from the schematic by eye
×1	220k	220k		read from the schematic by eye
×1	220	220		ohms; read from the schematic by eye
×1	1k	1k		read from the schematic by eye
×1	47k	47k		read from the schematic by eye
×1	1k2	1.2k		read from the schematic by eye
×1	22k	22k		read from the schematic by eye
×1	470	470		ohms; read from the schematic by eye
Capacitors 7
×1	0.1uF	100n		input; read from the schematic by eye
×1	150pF	150p		read from the schematic by eye
×1	33uF	33u		electrolytic, bias filter; read from the schematic by eye
×1	25uF	25u		electrolytic; read from the schematic by eye
×1	.001uF	1n		read from the schematic by eye
×1	33uF	33u		electrolytic, output coupling to transformer; read from the schematic by eye
×1	220uF	220u		electrolytic, emitter bypass; read from the schematic by eye
Diodes 1
×2	1N34A	1N34A		germanium rectifier pair; read from the schematic by eye
Transistors 2
×1	MPS-A18	MPSA18		read from the schematic by eye
×2	2N3906	2N3906		read from the schematic by eye
Potentiometers 2
Intensity	1k	1k	Potentiometer	read from the schematic by eye
Volume	A500k	A500k	Potentiometer	drawn 500k LOG; read from the schematic by eye
Other 1
×1	200:400mW	200:400MW		coupling transformer, impedance ratio 3:1, centre-tapped secondary; drawn "200 400mW"; read from the schematic by eye