Application Notes - LDG TW-2 Manual

You can also select SWR for tone readout, as above (SWR Button). The pitch of the tone is
proportional to the SWR; the higher the SWR, the higher the tone. If the SWR is above about 5:1,
the tone will pulse to indicate that the SWR is excessive.
After 30 seconds with no RF present, the TW-2 automatically reverts to Speech mode (verbose or
terse, whichever you have set). You can also manually reset it to Speech mode by pressing and
releasing any of the buttons. The TW-2 will beep to indicate that it has returned to Speech mode.

Application Notes

The TW-2 is primarily intended for visually impaired hams, and those of us more "experienced"
hams who must resort to bifocals, making small meters hard to see at any distance.
The TW-2 is also very useful for special situations when you need to "watch" more than one
meter, as when you are tuning the output stage of a vacuum tube transmitter or amplifier. With
your TW-2 in Tone mode, you can easily watch the plate current meter on the transmitter or
amplifier while listening to the power output on your TW-2 in Tone mode.
The TW-2 is perfectly suited to mobile use. Simply install it in a convenient location near your
operating position, and provide 12 volts DC through a fused line (fuse not included; LDG
recommends a 2 amp fast-blow fuse). SWR Tone mode is especially useful when tuning a
remotely controlled antenna while watching the road. LDG strongly recommends pulling over to
a stop before adjusting your antenna, but we realize that not everyone does this; you know who
you are.
FWD Button
REV Button
SWR Button
REV + SWR
FWD + REV
FWD + SWR
Press and
Press and
Release
Hold 3 sec
(RF Present)
Forward Forward Power
Power Tone Mode
Reverse Reverse Power
Power Tone Mode
SWR
Tone Mode
_
_
Band
needed
No RF
Button Summary
Press and Hold
On Power-Up
English
Spanish
SWR
German
_ Terse Mode
_ Verbose Mode
_ _
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