QST Articles: SB-220 Heathkit HF Linear Amplifier

1970 August QST p. 45 Heath SB-220 Linear Amplifier (Recent Equipment)

1974 December QST p. 47 SB-220 on 6 Meters (H&K)

1978 November QST p. 40 Heath SB-220 Modifications

1979 February QST p. 20 Upgrading Your Heath SB-220 Linear Amplifier (Feedback: Apr. p. 27; Jul. p. 50; Nov. p. 56)

1980 January QST p. 25 All Solid-State QSK for the Heath SB-220 (Feedback, Feb. p. 44)

1988 January QST p. 45 Using the SB-220 Amplifier with Solid State Transceivers (H&K)

1988 September QST p. 45 No Holes Standby Switch Modification for the Heath SB-220/SB-221 Amplifier (H&K)

1989 February QST p. 42 Improving the Heathkit SB-220 Amplifier

1989 November QST p. 25 Circuit Improvements for the Heath SB-220 Amplifier–Part 1

1989 December QST p. 41 Circuit Improvements for the Heath SB-220 Amplifier–Part 2

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