Vintage amp restorations plus some random old schematics and layouts
BACK FROM THE SIXTIES
...& Seventies
Burns Sonic Solid State Amplifiers
Including Baldwin Burns versions
The Sonic 20, Sonic 30 and Sonic 50 were Burns' more affordable alternative to the Orbit series.
Reworked after the Baldwin takeover and rebadged as 'Baldwin Burns', they were issued as the Sonic 25, 35 and 55. These later cabinet designs gave a nod to Baldwin's own American equipment, but the circuitry stayed British.
For 'Vibrato' read 'Tremolo'.
STILL WORKING ON THIS PAGE
Burns Sonic 20
Catalogue No. 546
Advertised Power Output: 20watts (British)
Size:
Weight:
Speakers: 2 x 10"
CONTROLS
Channel 1:
Input x 1
Volume, Treble, Vibrato Intensity, Vibrato Speed.
Power On/Off Switch
Channel 2:
Treble, Volume.
Input x 1
Captive Vibrato Footswitch in the back of the cabinet.
Baldwin Burns Sonic 25
Advertised Power Output: 25watts
Size:
Weight:
Speakers: 2 x 10"
CONTROLS
Channel 1:
Input x 1
Volume, Bass, Treble, Vibrato Intensity, Vibrato Speed.
Channel 2:
Treble, Volume.
Input x 1
Captive Vibrato Footswitch and Power On/Off switch in the back of the cabinet.
Burns Sonic 30
Catalogue No. 544
Advertised Power Output: 30watts (British)
Size:
Weight:
Speakers: 1 x 12"
CONTROLS
Channel 1:
Inputs x 2
Volume, Bass, Treble, Vibrato Intensity, Vibrato Speed.
Power On/Off Switch
Channel 2:
Treble, Volume.
Input x 1
Captive Vibrato Footswitch in the back of the cabinet.
Baldwin Burns Sonic 35
Advertised Power Output: 35watts
Size: 25"w x 20"h x 10"d
Weight: 35Ib (16kg)
Speakers: 1 x 12"
CONTROLS
Channel 1:
Inputs x 2
Volume, Bass, Middle, Treble, Vibrato Intensity, Vibrato Speed.
Channel 2:
Treble, Volume.
Input x 1
Captive Vibrato Footswitch and Power On/Off switch in the back of the cabinet.
Baldwin Burns Sonic 35 Schematic
NB: The component numbers are for convenience only. Factory numbers not available at the time of writing.
Left click to enlarge.
Baldwin Burns Sonic 35 Component Layout
Burns Sonic 50
Catalogue No. 545
Advertised Power Output: 50watts (British)
Size:
Weight:
Speakers: 2 x 12"
CONTROLS
Channel 1:
Inputs x 2
Volume, Bass, Treble, Vibrato Intensity, Vibrato Speed, Vibrato Footswitch Socket.
Power On/Off Switch.
Channel 2:
Treble, Bass, Volume
Inputs x 2
Baldwin Burns Sonic 55
Probably a Friday afternoon job, but you have to guess where the Vibrato labelling should have gone and what the Selector control might do.
Advertised Power Output: 55watts
Size:
Weight:
Speakers: 2 x 12"
CONTROLS
Channel 1:
Inputs x 2
Volume, Bass, Treble, Vibrato Intensity, Vibrato Speed.
Vibrato Footswitch Socket.
Channel 2:
Selector ?, Treble, Bass, Volume.
Inputs x 2
Power On/Off Switch in the back of the cabinet.
