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
www.KesslerEngineeringLLC.com
Summary of Contents for TL-922 Revival (tm)
Page 13: ...6 Figure 3 1 TL 922 Revival tm Upgrade Kit Contents www KesslerEngineeringLLC com...
Page 18: ...11 Figure 3 4 LED Circuit Board Correctly Installed www KesslerEngineeringLLC com...
Page 30: ...23 Figure 3 19 QSK PCB to QRO Output Connections www KesslerEngineeringLLC com...
Page 34: ...27 Figure 3 23 Electronic Bias PCB Installed www KesslerEngineeringLLC com...
Page 47: ...40 Figure 3 30 Step Start PCB www KesslerEngineeringLLC com...
Page 49: ...42 Figure 3 33 LED Schematic Diagram Figure 3 34 LED PCB www KesslerEngineeringLLC com...
Page 50: ...43 Figure 3 35 Electronic Bias Schematic Diagram www KesslerEngineeringLLC com...
Page 51: ...44 Figure 3 36 Electronic Bias PCB www KesslerEngineeringLLC com...
Page 54: ...47 User Notes www KesslerEngineeringLLC com...
Page 55: ...48 5 1 User Notes Continued www KesslerEngineeringLLC com...
Page 56: ...49 5 2 User Notes Continued www KesslerEngineeringLLC com...
Page 57: ...50 5 3 User Notes Continued www KesslerEngineeringLLC com...
