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General| Brand | MFJ |
|---|---|
| Model | MFJ-815D |
| Category | Measuring Instruments |
| Language | English |
Details the MFJ-815D SWR/Wattmeter, its purpose, and key features like peak reading and a cross-needle meter.
Connect transmitter to TRANSMITTER port and antenna to ANTENNA port using quality coax and connectors.
Unit requires DC power (9 VDC battery or 12 VDC external) for operation; lamp needs 12 VDC.
Connect a 50-ohm dummy load to the ANTENNA connector to measure transmitter/amplifier power output.
Push the ON/OFF button to turn the unit on. Select power ranges using the 3000/300 Watt button.
PEAK/AVG button selects peak envelope power (PEP) or average power; PEP readings differ on SSB.
Forward and reflected power are read on the meter scales, with values dependent on selected Watt range.
SWR is read where needles cross. True power is derived by subtracting reflected from forward power.
Lists required equipment: transmitter, dummy load, accurate power meter, and suitable cables for calibration.
Adjusts HI FWD and LO FWD trim pots to set the 3000W and 300W forward power scale accuracy.
Adjusts HI REF and LO REF trim pots for 100W and 60W reflected power scale accuracy.
States that SWR requires no calibration, as it is directly derived from forward and reflected power readings.
Provides contact information for MFJ Technical Service via phone, mail, FAX, and email for operational support.
Diagram showing the electronic components and connections for the sensor board of the SWR/Wattmeter.
Diagram illustrating the components and circuitry of the meter board, including amplification and meter drivers.
Details the warranty period, proof of purchase requirements, exclusions, and conditions for repairs or replacements.
Explains the procedure and associated charges for servicing units that fall outside the warranty period.
Provides the mailing address for sending MFJ products for in-warranty or out-of-warranty service.
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