Need help?Do you have a question about the Heath Heathkit SB-220 and is the answer not in the manual?
Details input voltage connections for 120 VAC and 240 VAC.
Primary and secondary connections for the High Voltage Transformer (T1).
Includes the main power switch and mode selection switch.
Connection for the cooling fan motor.
Identifies diodes (D1-D14) and resistors (R1-R9) on the main circuit board.
Lists capacitors (C3-C9) mounted on the main circuit board.
Includes Plate Meter, Grid Meter, and Multi-Meter Switch.
Details the Filament and Bias Transformer (T2) connections.
Schematic of the amplifier tubes (V1, V2) and associated components.
Includes tuning capacitors, inductors, and RFCs in the RF path.
Details connections for the bandswitch wafers (1F, 2, 1R).
Schematic for the 5.1 VDC cathode bias supply.
Includes the ALC threshold adjustment and related components.
Wiring for the sensitivity control and meter switch.
Details input voltage connections for 120 VAC and 240 VAC.
Primary and secondary connections for the High Voltage Transformer (T1).
Includes the main power switch and mode selection switch.
Connection for the cooling fan motor.
Identifies diodes (D1-D14) and resistors (R1-R9) on the main circuit board.
Lists capacitors (C3-C9) mounted on the main circuit board.
Includes Plate Meter, Grid Meter, and Multi-Meter Switch.
Details the Filament and Bias Transformer (T2) connections.
Schematic of the amplifier tubes (V1, V2) and associated components.
Includes tuning capacitors, inductors, and RFCs in the RF path.
Details connections for the bandswitch wafers (1F, 2, 1R).
Schematic for the 5.1 VDC cathode bias supply.
Includes the ALC threshold adjustment and related components.
Wiring for the sensitivity control and meter switch.
To Next Page
General