REPAIR AND RESTORATION OF THE SR-400
4
WDØGOF 6/22/20014
4-7. V6 RX FAULT ISOLATION.................................................................................................................... 17
4-8. V4A RX FAULT ISOLATION ................................................................................................................. 18
4-9. V3 RX FAULT ISOLATION.................................................................................................................... 18
4-10 V2 RX MIXER FAULT ISOLATION ..................................................................................................... 18
4-11 V1 RX FAULT ISOLATION................................................................................................................... 18
5. TECH NOTES .................................................................................................................................................. 19
5-1. BASIC TUNE UP ...................................................................................................................................... 19
5-1-1. THE PROBLEM: ............................................................................................................................... 19
5-1-2. WHY IS THIS IMPORTANT? .......................................................................................................... 19
5-1-3. A SIMPLE SOLUTION. .................................................................................................................... 19
5-1-4. SUMMATION: .................................................................................................................................. 19
5-1-5. MANUAL
SECTION 5-4
MARK UP:............................................................................................... 20
5-2 PA NEUTRALIZATION ........................................................................................................................... 22
5-3. OPTIONAL 6 MEG IF ALIGNMENT ..................................................................................................... 23
5-x. ADDITIONAL TECHNICAL INFORMATION SOURCES: .................................................................. 23
6. DATA SHEETS ................................................................................................................................................ 24
6-1. VFO FREQUENCY CORRECTION ........................................................................................................ 24
6.2 PERFORMANCE DATA ........................................................................................................................... 25
6-2-1. RECEIVER PERFORMANCE DATA .............................................................................................. 25
6-2-2. TRANSMITTER PERFORMANCE ................................................................................................. 26