Kessler Engineering TL-922 Revival (tm), Installation Manual

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5
3.3 TL-922 Revival
(
tm
)
Hardware Upgrade Kit Features
Kessler Engineering’s TL-922 Revival
(
tm
)
hardware upgrade kit provides:
1. Step-Start In-Rush Current Protection
2. Low-Voltage PTT Switching for use with modern solid-state transceivers
3. Quiet T/R Switching
4. QSK Operation
5. Electronic Bias Control
6. LED “On-Air“, “Standby”, and Meter Illumination
The upgrade kit utilizes four high-quality, removable circuit boards, with complete documen-
tation to facilitate installation, service and maintenance of the modified TL-922 amplifier.
The kit comes with all circuit boards assembled and tested. Should a fault develop on any
of these circuit boards, it may be removed and serviced. If necessary, they may also be
returned to Kessler Engineering for repair.
The complete modification kit comes with the items listed in Table 3.1 and shown in
Figure 3.1.
Table 3.1: TL-922 Revival
(
tm
)
Modification Kit Contents
Quantity Description
1 LED Circuit Board
1 Step-Start Circuit Board
1 QSK T/R Relay Circuit Board
1 Electronic Bias Circuit Board
1 Wiring Harness
8 Heat Shrink Tubing
12 Plastic Wire Ties
2 8mm Hex Nuts
2 Flat Steel Washers
2 Flat Nylon Washers
1 Rubber Grommet
1 LED Diffuser Paper
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