TW-4100A Frequency Modifications
TW-4100A Frequency Modifications
The following modification will allow the TW-4100A to transmit on the
VHF band from 141-151 and on the UHF band from 420 to 450 MHz.
- Disconnect the antenna, mic, and power cord.
- Remove the top and bottom covers fromm the transceiver by following
the procedure on page 28 of the Instruction Manual.
- Locate the row of diodes on the control unit (top front). The
diodes can be seen by lookng throught the cutout the chassis just
behind the front pannel.
- Using a sharp pair of wire cutters, cut diodes D6 (UHF) and D8
(VHF). Note that diodes D3, 4, 5, and 7 are already removed.
- Reinstall the top and bottom covers.
- Reset the microprocessor by turning on while pushing the M button.
Thats it!
Doug VE4KV@VE4KV
©1996 WB4KDI Dave J. Barnes