Heathkit SB-220

Heathkit SB-220 and SB-221

Reviewed by David • Senior RF Engineer & Technical Editor • March 2026

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  4.0/5 (1)

  SB 220 modification

  IV3GFN modification and restore of an HeathkitSB220
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  No votes

  SB-220 Mods

  Heathkit SB-220 Amplifier modification by KE5YA
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  5.0/5 (1)

  SB220 refurbish

  Heathkit SB220 refurbishing by PA5CA
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  5.0/5 (1)

  Heathkit SB-220 Meter Repair

  Repairt a Heathkit SB-220 Linear Amplifier with a bad Plate Voltage meter
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  5.0/5 (1)

  SB-220 Repairs and Modifications

  Heathkit SB 220 mods, replacing the Zener ZD1, replacing the plate-voltage voltage divider, adding a keying circuit for solid state transceivers