25
•
Remove the ground post near the filament transformer.
If unable to remove, then snap off the ground post as close as possible to the chassis
(
1
8
“ max height).
•
Remove all wires connected to the Filament Transformer’s 8V and 80V windings.
•
Do NOT remove either the #14
yellow wire
or the #14
red wire
shown in the upper
portion of Figure 3.20. These two wires supply filament current to the tubes and must
not be removed unless performing the filament voltage modification (not part of the
TL-922 Revival kit). However, Figure 3.21 does show how the filament supply leads
might appear if they were replaced during the filament voltage modification.
•
Add a 0.01uF capacitor between the filament transformer “C.T.” (Center-Tap) and
“E” (Ground) terminals. Ensure that the stock green wire remains soldered to the
transformer “C.T.”
The filament transformer and area immediately adjacent should now appear as shown in
Figure 3.21.
NOTE:
The “DANGER” label on the filament transformer contains an aluminum backing
and may be electrically conductive. Ensure that uninsulated electrical leads will not come
into into contact with the label.
Figure 3.21: Amplifier Chassis After Zener Bias Diode Removal
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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...
