24
3.8
Electronic Bias PCB Installation
Synopsis
The amplifier’s Zener bias diode and heatsink will be removed. The Electronic Bias PCB will
be installed and new connections will be made to the filament transformer and the primary
control PCB.
3.8.1
Zener Diode and Heatsink Removal
The stock Zener diode and its associated heatsink are located adjacent to the filament trans-
former as shown in Figure 3.20. This area will be used to hold the Electronic Bias PCB.
Figure 3.20: Zener Bias Diode Prior to Removal
•
Cut the brown wire where it attaches to the Zener diode. This is the
IG
connection
(described subsequently).
•
Remove and retain the screws holding the heatsink to the chassis.
•
Remove and retain the screw holding the terminal strip next to the Zener diode.
•
De-solder the diode from the ground post.
•
Remove the electrolytic capacitor and terminal strip located to the right of the filament
transformer in Figure 3.20.
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Содержание TL-922 Revival (tm)
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Страница 13: ...6 Figure 3 1 TL 922 Revival tm Upgrade Kit Contents www KesslerEngineeringLLC com...
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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...
