HF/VHF SWR Analyzer MFJ-249

MFJ-249 HF/VHF SWR Analyzer

The MFJ-249 combines four basic circuits: a wide range oscillator, a frequency counter, a 50 Ω RF bridge and a calibrated bridge unbalance indicator. This combination of circuits allows measurement of the SWR (referenced to 50  Ω) of any load connected to the ANTENNA connector. The FREQUENCY switch selects the following frequency ranges:
1.8 - 4 MHz, 4 - 10 MHz, 10 - 26.2 MHz, 26.2 - 62.5 MHz, 62.5 - 113 MHz, 113 - 170 MHz.

The MFJ-249 can be used to adjust or measure the following:
Antennas: SWR, resonant frequency, bandwitdth, efficiency
Antenna tuners: SWR, frequency
Amplifiers: Input and output networks
Coaxial transmission lines: SWR, velocity factor, losses, resonance
Balanced transmission lines: Impedance, velocity factor, resonence
Matching or tuning stubs: SWR, resonant frequency, bandwidth
Traps: Resonant frequency
Tuned circuits: Resonant frequency
Small capacitor: Value
RF chokes and inductors: Self resonance, series resonance, value
Transmitters and oscillators: Frequency

In questo link sono elencati 67 modelli, di cui 65 con immagini e 41 con schemi.
Elenco delle radio e altri apparecchi della MFJ Enterprises; Starkville (MS)