Heathkit SB-10 Series Troubleshooting Manual page 12

ah.4.4.SB-102-4: LMO Instability......................................................................................................................... 176
ah.4.5.SB-102-5: Low 40 Meter Output...............................................................................................................176
ah.4.6.SB-102-6: SB & HW Series Audio Preamplifier & VOX Circuit Trouble Shooting Guide.........................177
ah.4.7.SB-102-7: SB & HW Series Instability & Corrective Information..............................................................178
ah.4.8.SB-102-8: Alternate Method of Neutralizing the Final Amplifiers.............................................................179
ah.4.9.SB-102-9: Oscillations or Low Drive.........................................................................................................180
ah.4.10.SB-102-10: Self Oscillations Occurring After Installation of Steel Comb Brackets.................................180
ah.4.11.SB-102-14: Relays Remain Energized After Transmit Condition...........................................................180
ah.4.12.SB-102-15: Poor AGC Action................................................................................................................. 181
ah.4.13.SB-102-16: 100KHZ Calibrator Spurs....................................................................................................181
ah.4.14.SB-102-17: Poor Preselector Tracking ..................................................................................................181
ah.4.15.SB-102-18: Carrier Nulls with C14 Trimmer Plates Completely Meshed...............................................181
ah.4.16.SB-102-19: Relays Chatter in VOX Mode..............................................................................................182
ai)Using an HW-101 as a 100-watt PA........................................................................183
ai.1.The Basic Mod............................................................................................................. 184
ai.2.The Enhanced Mod......................................................................................................185
ai.3.Adjustment................................................................................................................... 185
aj)Tube Substitutes.....................................................................................................187
ak)Tube Test Data........................................................................................................188
HW & SB Series Manual Page 12