35
If the lamp sequencing works correctly, then proceed with the next test to confirm switching
operation of the QSK T/R Relay. For this test, we recommend using an audible continuity
tester.
1. Connect one lead of the continuity tester to the center pin of the SO-239 “RF INPUT”
jack.
2. Connect the other lead of the continuity tester to the center pin of the SO-239 “RF
OUTPUT” jack.
Confirm DC continuity between the center pins of the “RF INPUT” and “RF
OUTPUT” connectors.
3. Set the “LINEAR” switch to
OPERATE
.
4. Open the keying line.
5. Switch the amplifier
ON
.
Confirm DC continuity between the center pins of the “RF INPUT” and “RF
OUTPUT” connectors.
6. Electrically short the “Open” end of the keying line cable.
Confirm loss of DC continuity between the center pins of the “RF INPUT” and
“RF OUTPUT” connectors.
7. Measure DC resistance between center pin of the “RF INPUT” connector and the
tuned input network (Refer to Figure 3.16 on page 21) while the
ON AIR
light is
illuminated.
Confirm DC continuity between the center pin of the “RF INPUT” and the tuned
input.
8. Measure DC resistance between center pin of the “RF OUTPUT” and the output
bandswitch while the
ON AIR
light is illuminated.
Confirm DC continuity between the center pin of the “RF OUTPUT” and the
“common” contact of the output bandswitch. The “common” contact should connect
to the RF choke as shown in Figure 3.18 on page 22.
Confirm DC continuity between the center pin of the “RF OUTPUT” and chassis
ground. DC resistance should be
≈
10Ω.
9. Switch the amplifier
OFF
.
www.KesslerEngineeringLLC.com
Содержание TL-922 Revival (tm)
Страница 7: ...vii List of Tables 3 1 TL 922 Revival tm Modification Kit Contents 5 www KesslerEngineeringLLC com...
Страница 13: ...6 Figure 3 1 TL 922 Revival tm Upgrade Kit Contents www KesslerEngineeringLLC com...
Страница 18: ...11 Figure 3 4 LED Circuit Board Correctly Installed www KesslerEngineeringLLC com...
Страница 30: ...23 Figure 3 19 QSK PCB to QRO Output Connections www KesslerEngineeringLLC com...
Страница 34: ...27 Figure 3 23 Electronic Bias PCB Installed www KesslerEngineeringLLC com...
Страница 46: ...39 3 8 7 Electrical Schematics Figure 3 29 Step Start Schematic Diagram www KesslerEngineeringLLC com...
Страница 47: ...40 Figure 3 30 Step Start PCB www KesslerEngineeringLLC com...
Страница 48: ...41 Figure 3 31 QSK T R Relay Schematic Diagram Figure 3 32 QSK T R Relay PCB www KesslerEngineeringLLC com...
Страница 49: ...42 Figure 3 33 LED Schematic Diagram Figure 3 34 LED PCB www KesslerEngineeringLLC com...
Страница 50: ...43 Figure 3 35 Electronic Bias Schematic Diagram www KesslerEngineeringLLC com...
Страница 51: ...44 Figure 3 36 Electronic Bias PCB www KesslerEngineeringLLC com...
Страница 54: ...47 User Notes www KesslerEngineeringLLC com...
Страница 55: ...48 5 1 User Notes Continued www KesslerEngineeringLLC com...
Страница 56: ...49 5 2 User Notes Continued www KesslerEngineeringLLC com...
Страница 57: ...50 5 3 User Notes Continued www KesslerEngineeringLLC com...
