SWR-Meter

On this page you will find:

• Daiwa SWR Meter
• Giant SWR meter
• MFJ HF Amp meters
• Digital SWR/Watt Meter
• QRP Wattmeter
• Multichannel SWR/Powermeter with USB connection
• DIAMOND SWR/Power-Meter
• Cross needle intruments
• SWR-Analyzer

SWR Meter

Simple SWR Meter for shortwave and VHF. Separate analog instruments for power and SWR. Selectable range 10 or 100W. Frequency range 3.5 to 150MHz, impedance 50Ω. Size 65 x 145 x 55mm, weight 300g, connectors PL female.

Daiwa SWR Meter

Two different models available: CN-1xx is the smaller and affordable version, CN-8xx is the version with large instrument. Both models have selectable power ranges (see table), selectable power measurement average/peak. Easy to read cross needle instrument with illumination, solid metal cabinet.

CN-801HP with true peak power readout.
All Daiwa SWR meters can be selected to display avearge or peak power. The PEP value is found by different different charge/discharge constants and therefore is not very precise.
In contrast to that the new CN-801HP has a true, active peak envelope power (PEP) reading which is important for PSK31 and other digital modes. This function requires an external 12V DC power supply.

The CN-802HP-3 has a max. range of 3000W (compared to 2000W of the CN-802HP).

Giant SWR meter MFJ-869

MFJ-869

Giant SWR Meter MFJ-869.
19cm wide, 17cm high, 16cm deep and not to be ignored on your desk! The giant SWR meter by MFJ is controlled by a micro processor and shows peak or average power as wel las the reflected power. The three ranges with 20, 200 or 2000 max. are selected automatically. Maximum power is 1500W, frequency range from 1.8 to 54 MHz.

An SWR Alarm value can be selected from 1.5 to 3.0 in steps of 0.5. When reaching this SWR value (accidently) an acoustic and visual alarm goes off. Further the PTT line of the amplifier can be looped through the MFJ-869, this line is cut when high SWR happens, thus protecting your amp. Plus you have an additional relay contact (NC or NO) for other alarm actions.

The MFJ-869 giant SWR meter requires 12 to 15V supply voltage, max. current requirement is 350mA. A DC cable with suitable connector is included. Coax connectors on the rear side are PL (SO-239), the relay contact is on a 3.5mm phone jack, the amp PTT line is connected though cinch connectors. An further 9-pin serial SubD connector is used for software updates. When no HF power is seen by the SWR meter the processor switches to sleep mode to save power and prevent spurious noise on HF.

MFJ HF Amp meters

Inserted directly into the antenna feedline, measures antenna current in three calibrated ranges.
Use the RF current meters for precise measurements of antenna currents, while tuning your amplifier or tuner, calculate the impedance of your antenna feedpoint. Highly suitable for experiments with antennas or monitor changes of the antenna during operation.

Tuning for maximum antenna current usually results in highest radiated power (power rises to the square of the current). The minimum SWR is not necessarily the point where the highest antenna current is found. Or compare the efficiency of various tuners, the MFJ HF current meters identify losses quite easily.
The MFJ HF current meters are solid constructed devices for shortwave. Frequency range 1 to 30MHz, calibrated ranges for max. 0,3, 1 or 3A. 3A correspnd to 450W on a 50Ω antenna. .

MFJ-834, HF current meter, Coax, max. 3A

Connectors PL sockets for direct insertion into the feedline. Large, backlit analog instrument, size 152 x 89 x 114mm, weight 425g.

MFJ-835, HF Ampèremeter, Parallel wire, max. 3A

Ideal to check the current balance of parallel wire feeds. The large bar in the middle of the instrument clearly identifies the range of balanced current on both wires. Balanced currents lead to less radiation from the feedline, reduces distortion of the antenna pattern, less risk of TVI and BCI. The MFJ-835 allows you to analyse the problems exactly.

Binding posts for parallel wire. Large, backlit analog cross-needle instrument, size 152 x 89 x 114mm, weight 620g.

MFJ-836, combined HF current and SWR meter

The MFJ-836 combines both an SWR meter and a HF current meter, resulting in a compact control showing all antenna parameters.

Lage cross-needle instrument for VSWR/Power, max. range 300/3000W selectable, peak or average power selectable. Analog instrument for HF current up to 3A. Connectors PL sockets, size 152 x 89 x 114cm, weight 650g.

Ranges MFJ-836: 0.3, 1, 3A

Ranges MFJ-836H: 3, 10, 30A

MFJ-854,HF Current meter

The MFJ-854 is a very sensitive HF current meter. The sense coil snaps over any wire, radiator or cable and measures the true current flow in that conductor. This allows to measure currents in parts of an antenna, in radial or ground networks or on coaxcales. Also detects induced current in other conductors, like any household appliance and helps in identifying interferences like TVI or BCI.
Five fixed ranges from 30mA to 3A or one variable range selectable. The variable range has a minimum sensitivity of 1mA, enough to sense smallest currents like those from the MFJ SWR meters MFJ-259B or MFJ-269.

• High accuracy due to electronical compensation, especially at low currents
• Wide application from 1mA to 3A in six selectable ranges
• Full coverage of HF from 1.8 to 30MHz
• Little influence on the tested conductor
• Sense coil snaps over max. 1.3cm conductors
• Low power consumption and power-save mode allow for extremely long battery life
• Weight: ca. 400g

MFJ-826B Digital SWR/Watt Meter

MFJ-826B

Measures power and SWR on HF and 6m.

Forward and reflected power, SWR and tx frequency can be displayed at the same time. Alternatively TX power and SWR can be displayed as easy to read bar graphs. The MFJ-826B has as backlit 2 line LC display. Softwareupdate are possible over the RS232 serial interface.

MFJ-813: QRP Wattmeter

MFJ-813

SWR/Wattmeter for QRP

The MFJ-813 offers a calibrated scale up to max. 5 Watt and allows measurements of power and SWR, the minimum power is 100mW. The sensor (system Bruene) detects RF voltage and current for a uniform accuracy over a wide range of impedances, frequencies and power. Frequency range 1.8 to 50MHz, aluminium case, 2x SO-239 (PL) connectors, size 11.5 x 6 x 7.5 cm.

MFJ-815C: 300/3000W SWR/Wattmeter

MFJ-815C

SWR/Wattmeter for 300/3000W

The MFJ-815C is an SWR and power meter with true peak value measurement, for power levels of up to 300 or 3000W, frequency range from 1.8 to 30MHz. The cross needle instrument is selectable for max. forward power of 300 or 3000W, 60 or 600W reflected power. To use the MFJ-815C the device must be supplied with external 12V DC, otherwise the peak power measurement will not work. Alternatively a 9V battery can be installed internally. A switch selects between average and peak power measurement. Connectors 2x PL.

WN-2: Multichannel SWR/Powermeter with USB connection

WN-2 Front View

The new WN-2 power meter measures and displays output power or SWR of up to four radios/antennas at the same time.

Up to four sensors for power/SWR can be connected to the device and can be installed at the point where they are rquired; sensors are available for 1.6 to 470MHz and up to max. 8KW.

The measured data is displayed on a computer connected via USB. The required software (for Windows XP or newer, 32/64 bit) is included.

When operating standalone the data is shown on the internal LC display. So a computer is not required, but of course would give a much better overview.

The WN-2 measures spectrum and envelope of the transmitted signal up to 20kHz modulation bandwidth. Intermod, splatter or overmodulation can be seen immediately. The required fast sampling rate of the transmitted signal is achieved by using a fast RISC processor in the sensor.

Additionally the WN-2 offers four analog (0 to 10V) and four digital (TTL) inputs for many measurement tasks. A programmable solenoid output offers the possibility to emergency shut-down, for example in the case of high SWR. Another option is the board to control a Yaesu rotator.

The device is shipped including one HF 2kW sensor, CD-ROM, USB cable and power supply.

HF- and SHF-Sensor 2kW with RF-View.
This new sensor offers an additional output (BNC female). This output signal can be connected directly to an oscilloscope and allows to monitor the trnasmitted signal in realtime. This is very useful to monitor distortions etc.

WN-2 Rear View

Screenshot WN-2

HF Sensor 2000W, 150cm cable

UHF Sensor 500W, 150cm cable

HF Sensor with RF-View

DIAMOND SWR/Power-Meter SX-27, SX-100 ... SX-1000

SX-1100

High performance meter well superior compared to the CB gear. All equipment features 12V DC input for powering the illumination and display LED's. However, can be operated at full functionalities without the external power supply.
Those meters having two separate RF sensors (see table) may be connected simultaneously to two transceivers with the appropriate antennas. Switchover between the sensors is done by means of a switch located in the box.

Technical Data:
• selectable power meter 'mean value / PEP'.
• select display either forward power / reflected power or VSWR
• three selectable power ranges, see table
• large meter, built-into a solid metal box
• Precision ± 10% of full scale

SX-27P

Cross needle intruments

SX-20C and SX-40C: Compact meters from DIAMOND also suitable for mobile applications. Simultaneous display of forward and reflected power and SWR. Two measurement ranges, needs 3 watts minimum for VSWR. SX-240C has two sensors (HF, V/UHF), max. 3000W on HF, all connectors PL female.

Model	SX-20C	SX-40C	SX-240C
Frequency range	3,5-30/50-54/130-150	144-470	3.5-54 & 140-470	MHz
Power Range	30/300	30/300	30/300/3000	Watt
Precision	better than 15%
Size	85x87x95	85x87x95	110x170x125	mm
Order No.	24011 78.40 EUR Buy now	24010 84.00 EUR Buy now	24007 239.00 EUR Buy now

SWR-Analyzer

MFJ-259B / MFJ-269

MFJ-259B

MFJ-269

With the MFJ-259B get your antennas properly tuned for maximum performance. Connect to the feed line, set the bandswitch and tune the dial - just like a transceiver. Read the antenna SWR and complex impedance. By tuning through you see instantly the antenna resonance frequency. Frequency range: MFJ-259B: 1.8 - 170 MHz, MFJ-269: additionally 415-470 MHz. External 12V supply or internal batteries (10x AA size).

MFJ-259B: 5 measurement units all in one:
• RF signal generator 1.8 - 170MHz
• Frequency counter with 0.1Hz accuracy
• SWR Analyzer
• Measure complex antenna impedance
• Dip meter (with option MFJ-66)

Accessories MFJ-259B, MFJ-269

MFJ-731: When making measurements with the SWR analysers MFJ-259B and MFJ-269 it can happen that strong, nearby broadcast station can influence the measurement. This is a situation where the adjustable filter MFJ-731 helps. The MFJ-731 filter can be used a notch filter between 550 and 1800kHz to reject stong medium wave (AM) stations. The the ranges 1.8-20.0, 3.5-4.0 and 7-30 MHz the MFJ-731 can act as an adjustable band pass filter. The filter needs to be aligned before each SWR measurement. Connectors: 2x PL socket.

MFJ-29C

MFJ-66

MFJ-731

MFJ-266 SWR Analyzer

MFJ-266

Compact antenna and HF instrument for shortwave and up to 70cm UHF

The MFJ-266 SWR analyser covers the bands from shortwave, over 4m and FM radio up to 2m VHF and 70cm UHF. The backlit LC display shows frequency, SWR and impedance (real and imaginary parts, absolute magnitude) at the same time. Further the device can measure capacities, inductivities, field strength or frequency, as wel las act as a signal generator. This enables you to perform easily all antenna measurements as well as frequent HF measurements on cables, stubs, filters, baluns etc. Yet the MFJ-266 is easy to operate.

Frequenca ranges
The MFJ-266 covers the following frequency ranges:

• A: 1.5 — 2.7 MHz
• B: 2.5 — 4.8 MHz
• C: 4.6 — 9.6 MHz
• D: 8.5 — 18.7 MHz
• E: 17.3 — 39 MHz
• F: 33.7 — 65 MHz
• V: 85 — 185 MHz
• U: 300 — 490 MHz

SWR Measurement
The SWR measurment covers a range from 1:1 to 9.9:1, impedances from 10 to 500 Ω, displayed are real- and imaginary part (not on UHF!).

Capacity and Inductivity measurement
Unknown components like capacitors and inductances can be easily found out with the MFJ-266, the result is shown in pF or µH. The measurement is done at HF frequencies, not low AF frequencies as with some cheap LC meters.

Frequency- and Field Strength Measurement
When operating the MFJ-266 as a frequency counter, the device covers frequency of up to 500MHz, the resolution can be selected between 1kHz and 100Hz. In this mode the relative field strength is also displayed, allowing comparative measurements of antennas, oscillators, transmitters etc.

Signal Generator
The MFJ-266 can be operated as a signal generator. The is usefil for measurements on filters, mixers or low-power driver stages. The output level is approx. 2V_pp.

Size, Weight, Power Supply
The size of the SWR analyser is 95 x 79 x 165mm (WxDxH), the weight is approx. 800g. The power supply is either done by 8 internal AA batteries or externally with 12 V=. Power consumption approx. 30mA in frequency counter mode, or 140mA in analyser mode. The antenna connector is N female, an adaptor to PL is included. The Grip-Dip coils MFJ-66 (see above) can be used with the MFJ-266 as well.

MFJ-207 SWR Analyser

The MFJ-207 10-160 Meter Antenna SWR Analyzer gives you a direct readout of your antenna's SWR without the need for formulas or indirect readings. The MFJ-207 can also be used to adjust a tuner to match your antenna without the need for transmitting. The frequency coverage for the MFJ-207 is approximately from 1.75 MHz to 30 MHz in five bands. This provides a very smooth reading of SWR at high frequencies. The coverage for each band may slightly vary from the coverage labled on the cover. The bands and coverage are:

• BAND A: 1.75 - 3.00 MHz
• BAND B: 3.00 - 5.00 MHz
• BAND C: 6.50 - 11.70 MHz
• BAND D: 11.65 - 20.00 MHz
• BAND E: 18.00 - 30.00 MHz

It has a jack for an external frequency counter. The MFJ-207 uses a 9V battery or external EDC 12V. It measures 19H x 6.5W x 5.7D cm.