Note
The TW-1 is dewsigned to provide accurate and precise RF power and SWR readings aurally, by synthesized voice over a self-contained speaker. It is ideal for situations when you need to watch something else while making an adjustment, or for visually impaired hams.
Readout resolution is 1 watt or 1% of the reading, whichever is larger. For example, if the reading is 75 watts, 1% would be 0.75 watts, so the achieved resolution would be 1 watt. The readout would go from "Seventy Five Watts" to "Seventy Six Watts" as you increase power. At a reading of 245 watts, 1% would be 2 watts (rounded off), so the resolution would be 2 watts; the reading would go from "Two Hundred Forty Five Watts" to "Two Hundred Forty Seven Watts".
The TW-1 will speak in one of two different modes: Verbose and Terse. In Verbose mode, the TW-1 speaks in full sentences, as in "The forward power is ninety seven watts". In Terse mode, only the numerical value is spoken, as in "ninety seven". The default is Verbose mode. To select Terse mode, press the REV and SWR buttons together while you apply DC power. Thereafter, on pressing a button when RF is present, only the numerical value will be spoken.
There is no range switch; the TW-1 auto-ranges from 0 to 2,000 watts. There is no On/Off switch; the TW-1 automatically turns itself on during use and off after use. The idle current is less than 100 uA.
Specifications
– 0 - 2,000 watts, auto-ranging
– +/- 5% accuracy (measured on 14 MHz), 10% on 6 meters
– 1 watt or 1% power resolution
– Adjustable volume
– Verbose or terse speech
– Tone mode for continuous feedback
– Speaks in English, Spanish or German
Power Requirements: 12 volts at 200 ma, 2.5 x 5.5 mm jack, center positive.
