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V.S.W.R. meter Introduction VSWR. Forward and reflected power direct digital readout, without any calibration. Maximum measurable power range up to 120W. low insertion loss (0.3 decibels or less) structure allows it to be permanently connected. Build in Frequency counter . All Funtion display ( Frequency Counter ,Powe SW-28VU 125-525MHz SW-28HF 1.5-60MHz SWR & Power Meter This S.W.R. & Power meter is a highly accurate RF meter for measuring Forward Power, Reflected Power, and V.S.W.R. Main Features: · O-LED meter display for easy reading. · Forward RF power readings, switchable to indicate either average power. · Reflected RF power readings. · V.S.W.R. ratios. · Convenient control for easy operation. Manual Wholesale Quotation Shopping SURECOM SW-28 SWR & Power Meter Instruction Features: - According to the fitting algorithm of the characteristics of the detector diode, coupled with the dual-reference segment detection, the accuracy in the power range of 0-120 watts is better than 5%. - 5 kinds of interface display methods, choose according to your preferences , one-click switching. - High-speed average detection method, real-time efficiency display. - Buzzer alarm when a standing wave is greater than 2.0. - Built-in lithium battery, which can be used for more than 100 hours on a single charge. - Multi-function buttons make it more fun to use, reserve space for adding functions in the future and provide an additional interactive method. Parameters: Frequency range: 1. 5-60MHz (SW28HF) Frequency range: 125-525 MHz (SW28VU) Power measurement range: 0 -120W Standing wave measurement range: 1.0:1-19.99:1 Insertion loss: <0.12dB Insert standing wave: ≤1.02 Measurement accuracy: better than ±5% Standing wave alarm: ≥3.0 (with close function) RF interface type: SO239 Display content: forward power; standing wave; antenna power; efficiency. Power supply: built-in rechargeable lithium battery or USB type-C Power off power consumption: <0.1uA Data communication: USB type-c Overall size: 88mm (W)*40 mm(H)*80mm(D) (excluding protruding parts) A simple introduction to use: - Long press to switch the machine, short press to switch the display interface, double click to switch the standing wave alarm; - There are 5 kinds of display interfaces in total, which are automatically saved and automatically recalled the next time you start up. - The red light is displayed when charging, and the light is off when fully charged. Explanation of Features: 1. Power Switch. 2. 0.96" OLED Display. 3. Menu. 4. Peak/Avg or Enter ( SW-28HF only ), Enter (SW-28VU only) 5. Charger LED 6. 5V Charger in Type -C. 7. ANT Connector: Coax connector to 50 ohm antenna system. 8. TX Connector: Coax connector to transmitter 50 ohm RF output. 9. Model No.Detail & Work Frequency Range. SW-28HF explanation of display 1. Model No. 2. Battery Level 3. Forward watt data 4. Forward watt data 5. Version No. 6. S.W.R.data 7. Reflected watt Menu: 1. MODE: Power on by Avg. /Peak 2. BEEP: ON/OFF 3. AUTORESET: OFF ~30sec. 4. EXIT 5. SAVE & EXIT SW-28 VU explanation of display 1. Model No. 2. Battery Level 3. Forward watt data 4. Forward watt data 5. Version No. 6. S.W.R.data 7. Reflected watt 8. A(analog) ,D(DMR) Menu: 1. BEEP: OFF / SWR> 3~9 2. AUTO RESET: OFF ~ 15 sec. 3. ADJ. WATT : + - 99 (long press Enter for + - ) 4. EXIT 5. SAVE & EXIT How to Use : The S.W.R.meter is connected between the r adio (TX) and the antenna, as close as possible to the transceiver (use a cable of max. 40 cm like Test Jumper. 1)Check all connections. 2)Press the key of the microphone PTT to pass into the transmission and keep it in this position. 3)Read data of S.W.R. / Forward watt / Reflected watt What is a high SWR reading? 1.5 -> 2.0. Your antenna is acceptably tuned and should work fine. 2.0 -> 3.0. Your SWR reading is slightly high, it shouldn't damage your radio, but you should try and tune your antenna to bring down your SWR reading. Above 3.0 or more. Your antenna isn't tuned acceptably and could damage your radio. If you have related videos, please share with us, please contact us

Features:  1 V.S.W.R. Forward  power direct digital readout, without any calibration.  2 V.S.W.R. REW  power direct digital readout, without any calibration.  3. Maximum measurable power range up to 100W.  4. 3 seconds check your antenna SWR , also check your radio RF power watt. 5.Easy to install handheld Radio  SW-33PLUS SURECOM SW-33 PLUS 125-525 Mhz Mini Digital VHF/UHF Power & SWR Meter Features: 1. V.S.W.R. Forward power direct digital readout, without any calibration. 2. V.S.W.R. REW power direct digital readout, without any calibration. 3. Maximum measurable power range up to 100 Watt. 4. 3 seconds check your antenna S.W.R. , also check your radio RF power watt. 5. Easy to install handheld Radio Manual Wholesale Quotation Shopping Features function Push red button and hold 2 sec. to" Power on " and "ALL "mode " LCD display show Push red button -" 90° "mode , LCD display show Push red button -" 180° "mode, LCD display show Push red button -" V.S.W.R. "mode ,LCD display show Push red button -" FW POWER "mode ,LCD display show Push red button and HOLD -" POWER OFF 1.1 How to use Power meter (forward) Push red button -switch on Push red button at four times to mode "POWER meter " ,LCD display show Connect the SMA (mark TX) to Radio output . Connect the SMA to DUMMY Load Caution : Please use correct dummy load , High power will damage the dummy load. 1.2 How to measure SWR? All forms of SWR meters measure SWR, standing wave ratio on a transmitter feeder. Using SWR meter is relatively easy, but one should be able to interpret the results when using it. In general, VSWR and SWR are the same. When using VSWR meters to measure the the performance of a new antenna, always one should prefer to use up to 3W power and a clear channel. The following procedure can be used to use the meter. Push red button at two times to mode "V.S.W.R. meter " ,LCD display show Connect the SMA (mark TX) to Radio output . Connect the SMA (mark Ant) to ANTENNA When the the LCD show 1.00 to 1.50 , 1.0~ 1.5:1 mean the antenna is suit the frequency. When the the LCD show 1.50 to 3.00 , 1.5~ 3.0:1 mean the antenna is not good suit the frequency. When the the LCD show 5.00 to 19.99 ,5.0~19.99:1 mean the antenna is not suit the frequency. The VSWR meter is connected in the feeder from the transmitter to antenna. For the feeder convenience, SWR meter is located at the transmitter end of the feeder. This helps to monitor the actual VSWR values. One should know, where exactly SWR can be measured. There is always some degree of feeder loss, which has a major effect on the VSWR readings. Feeder loss absorbs power in both directions. When the reflected signal is reduced, there is a high level of feeder loss. The reflected signal gets reduced as a forward signal to the antenna, later it’s reflected back to the transmitter. Since the signal is reduced on its way to the transmitter, an antenna with poor match and high VSWR will be fine at the transmitter. Hence, when a feeder that induces a high loss is used, VSWR is good at the transmitter, but at the antenna, it may be poor. Package Contents 1x SW-33 PLUS SWR/POWER METER 1x English User Manual 1x USB charger cable (Not include Power adaptor) 1x SMA male to SMA male Adaptor 1x SMA male to SMA female Adaptor 1x SMA female to BNC female Adaptor 1x SMA male to BNC male Adaptor 1x 5-20W DUMMY LOAD for testing / other type of 5W dummy load for testing (random) SWR Formulas and Calculations VSWR can be calculated from various parameters. By definition, VSWR is given as ratio of maximum voltage on the line to the minimum voltage. The same can be expressed in terms of forward and reflected wave voltages. If you have related videos, please share with us, please contact us

BLUETOOTH SPEAKER MIC 41-92A/B Surecom waterproof Bluetooth Speaker Microphone PTT for Android Phone POC walketalkie Main features: 3 hours to complete the charge standby time about 100 hours support mobile phone, intercom and music automatic switching support volume control extra 3.5mm plug headphones support Bluetooth A2DP music playback Function: for Andriod Phone / I-OS /POC App : Zello , 409PTT MORE INFORMATION 41-99 Bluetooth Ham Radio PTT Speaker Mic for Android Walkie Talkie for ZELLO A certified push-to-talk hardware created specifically for Zello Use a dedicated hardware button for push-to-talk. Listen clearly in noisy environments through a headset or more powerful speaker. Keep your phone locked and safe in your pocket, or talk and listen while using other apps. Your Android devices need either a data plan or a WiFi connection. VISIT WEBSITE 41-101 Radio Zello Phone Dual PTT Mix Talk Bluetooth Speaker Microphone Functional Description: Telephone processing: Support mobile hands-free functions, mobile phones, intercom and music automatic switching Support voice dial-up Last code replay Telephone answering, reject and hang up modulation A2DP music: Support Bluetooth A2DP music playback Can enjoy mobile stereo music or other A2DP music sources Using the Bluetooth AVRCP protocol, the remote music playback can be suspended, the last or the next Independent volume control button Volume storage VISIT WEBSITE 41-105 Bluetooth Ham Radio PTT Speaker Mic for Walkie Talkie VISIT WEBSITE