29
Figure 3.24: Amplifier
IG
connection
3.8.5
Filament Transformer Electrical Connections
The connections to the filament transformer will be completed next. When finished making
the electrical connections to the filament transformer, the results should appear as shown in
Figure 3.23.
The
Filament Transformer
includes an isolated 8V secondary winding to provide meter
illumination current and an isolated 80V secondary winding to provide current necessary to
operate the T/R relay.
Note:
While reference is made to the labels printed on the outer layer of the transformer,
often these labels are partially obscured by the warning label. Please refer to the orientation
of the connecting wires shown in Figure 3.23 as a guide.
CT Electrical Connection
•
Solder the
CT
wire lead to the filament transformer
CT
terminal. The
CT
terminal
is the upper left terminal as shown in Figure 3.23.
80V Winding Electrical Connections
The filament transformer 80V secondary winding feeds a full-wave bridge rectifier DC power
supply used to power the QSK T/R relays. The label for the 80V winding may be partially
obscured by the transformer warning label. However, the 80V windings are the two terminals
shown on the right side of the transformer just below the
E
(Ground) terminal (Figure 3.23).
•
Solder the first
80V
wire to the 80V terminal labeled “0.25A” on filament transformer.
•
Solder the second
80V
wire to the 80V terminal labeled “80V” on filament transformer.
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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...
