WOW

This page exists to document my restoration of a Heathkit SB-220 amplifier.

I acquired this amp from the QRZ forums. What little I know about the history is that it came from a silent key and the first pass of restoration was started by a fellow ham in West Virginia.

The amp was in a very basic shape and required extensive cleaning to remove tar and smell left over from a former owner. I read through several resources on the SB-220 and decided to apply the following modifications from the as shipped configuration:

• Harbach Rectifier Metering board (RM-220)
• Replacement Filtering capacitor block
• Replacement feet
• Molex connectors on the HV transformer leads
• W7RY QSK mod with vacuum relay(s)
• Standby switch on the front (disables keying line)
• Removed the ALC function