Dosy TFB-3001-S Meter

The Dosy TFB-3001-S meter is an in-line wattmeter and test center designed for CB and amateur (ham) radio users to measure SWR, AM modulation, peak watts, and frequency in the 1.8 MHz to 50 MHz range. The “S” designation indicates it is specifically configured for single-side band (SSB) users.
Key Features and Specifications
Measurement Functions: Simultaneously monitors antenna SWR, AM modulation, and reads peak watts. It also features a built-in frequency counter.
Frequency Range: Accurately measures frequencies from 1.8 MHz to 50 MHz.
Wattage Ranges: Offers three switchable power ranges: 0-10, 0-100, and 0-1000 watts.
Display: Features three large, 2.5-inch black-faced meters with LED backlighting for easy readability.
SSB Specifics: The “S” model includes a momentary toggle to allow for SSB readings without voice interference and a 3-foot speaker lead for tone generation into the microphone, allowing testing without hard-wiring the unit.
Power Supply: Includes a power pack for operation of the frequency counter and meter lights.