Heathkit SB-220

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Heathkit SB-220 and Heathkit SB-221

• 2 kW HF Amplifier Rebuild - Heathkit SB-220 amplifier repaired at W8UM
  [ Hits: 7289 | Votes: 6 | Rating: 5.17 ]
• Heathkit SB-220 - The Heathkit SB-220, two 3-500Z, amplifier made a notable impact in the world of amateur radio when it debuted in 1975. Resources and modifications
  [ Hits: 3588 | Votes: 1 | Rating: 1.00 ]
• Heathkit SB-220 and SB-221 essential mod - Modifications to avoid damage when 3-500Z tubes fail.
  [ Hits: 4071 | Votes: 10 | Rating: 5.20 ]
• Heathkit SB-220 Meter Repair - Repairt a Heathkit SB-220 Linear Amplifier with a bad Plate Voltage meter
  [ Hits: 749 | Votes: 0 | Rating: 0.00 ]
• Improving Heathkit SB-220 - Circuit Improvements for the Heath SB-220 Amplifier
  [ Hits: 2359 | Votes: 6 | Rating: 9.83 ]
• QSK for the TL-922 and SB-220 mods - Beautifully constructed amplifiers. Unfortunately, are not suited for high speed T-R switching, a necessary attribute for operating AMTOR, QSK-CW, or SSB-VOX modes.
  [ Hits: 2653 | Votes: 6 | Rating: 8.33 ]
• SB 220 modification - IV3GFN modification and restore of an HeathkitSB220
  [ Hits: 848 | Votes: 1 | Rating: 8.00 ]
• SB-220 / 200 Amplifier with Solid-State Transceivers - Using Solid-State Transceivers With Older Tube Amplifiers, some Hines and Kinks on the Heath SB-220/200 that can be useful in your application
  [ Hits: 1112 | Votes: 1 | Rating: 10.00 ]
• SB-220 Mods - Heathkit SB-220 Amplifier modification by KE5YA
  [ Hits: 806 | Votes: 0 | Rating: 0.00 ]
• 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
  [ Hits: 712 | Votes: 0 | Rating: 0.00 ]
• SB-220 SB-221 Heathkit Amplifiers - SB-220 or SB-221 Heathkit Amp Using Eimac's 3-500Z - K0GKD
  [ Hits: 4771 | Votes: 7 | Rating: 7.57 ]
• SB220 refurbish - Heathkit SB220 refurbishing by PA5CA
  [ Hits: 554 | Votes: 1 | Rating: 10.00 ]