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Heathkit SB-220

Heathkit SB-220 and Heathkit SB-221

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    • 2 kW HF Amplifier Rebuild - Heathkit SB-220 amplifier repaired at W8UM
      [ Hits: 6333 | Votes: 4 | Rating: 4.75 ]
    • 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: 3245 | Votes: 1 | Rating: 1.00 ]
    • Heathkit SB-220 and SB-221 essential mod - Modifications to avoid damage when 3-500Z tubes fail.
      [ Hits: 3491 | Votes: 10 | Rating: 5.20 ]
    • Heathkit SB-220 Meter Repair - Repairt a Heathkit SB-220 Linear Amplifier with a bad Plate Voltage meter
      [ Hits: 295 | Votes: 0 | Rating: 0.00 ]
    • Improving Heathkit SB-220 - Circuit Improvements for the Heath SB-220 Amplifier
      [ Hits: 2334 | Votes: 5 | Rating: 10.00 ]
    • 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: 2353 | Votes: 6 | Rating: 8.33 ]
    • SB 220 modification - IV3GFN modification and restore of an HeathkitSB220
      [ Hits: 581 | 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: 876 | Votes: 0 | Rating: 0.00 ]
    • SB-220 Mods - Heathkit SB-220 Amplifier modification by KE5YA
      [ Hits: 564 | 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: 331 | 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: 4541 | Votes: 7 | Rating: 7.57 ]
    • SB220 refurbish - Heathkit SB220 refurbishing by PA5CA
      [ Hits: 325 | Votes: 0 | Rating: 0.00 ]
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