![]() ![]() The main microprocessor of the tuner is PIC16F18877, another PIC16F1454 processor is used as an embedded programmer. The current consumption in the operating mode is 12 mA, in the sleep mode 170 μA, in the off state 37 μA. After 30 minutes of sleep, the tuner turns off completely and you can turn it on by holding the button for a long time (more than 3 seconds). You can wake him up with a short press on the button. The tuner has 3 power consumption modes - the operating mode, when the display indicates the parameters, lasts 5 minutes, after which the tuner falls asleep and the display turns off. The best examples of these (SANYO) have a capacity of 800 mAh each, the worst ones are usually 400 mAh. The built-in battery consists of two Li-Ion 14500 batteries connected in parallel. The tuner is built on IM41 bistable relays, which means that a significant current is consumed by the tuner only for a short time during tuning in rest mode, the tuner's relays retain their state for an arbitrarily long time, without consuming power. The display mainly shows the current transmitter power and SWR in the transmitter cable and sometimes briefly indicates the modes. The control button has only 3 functions - a short press resets the tuner and sets all relays to their initial state, in which all reactive elements are disabled and do not affect the signal flow through the tuner, a long press causes the tuner to enter the tuning mode and a very long press for more than 5 seconds causes the firmware version to be displayed on the display. The rear panel contains RF BNC connectors, a ground clamp and an external control interface connector that can be connected to the transceiver for more convenient control of the tuner. On the front panel there is a control button, a small 0.91" OLED 128 * 32 display and a USB Type C connector, used to charge the tuner's built-in battery and connect to a computer to change the firmware. The tuner is assembled in an affordable Chinese case 100x71x25 mm, the front and rear panels are made as PCB, in the same way as the main printed circuit board. When you press the button of external tuner control on the transceiver, the tuner is automatically run if ON or reset if OFF position. That is, when the tuner button is pressed, the transceiver automatically generates a carrier for tuning and when changing from band to band, the transceiver initiates tuning by the tuner. Long press on the button now turns the device on and off.Ģ - external control using the Icom protocol is implemented, works in both directions. The current consumption in this monitoring mode is 4 mA. For these 30 minutes, the tuner constantly monitors the power supplied and instantly lights up the display when needed. Now the tuner either shines on the display for 5 minutes after it is disturbed, or turns off after 30 minutes if it is not touched and the transmitter is not turned on. New in FW version 1.1ġ - the control method has been reworked, there is no more sleep mode. New in FW version 1.5Ģ - More stability in bus transfer to OLEDģ - No continious data transferring to the display New in FW version 1.2ġ - Display memory feature for last SWR addedĢ - full automatic mode error solved. Repeat it couple times to reach a good result. If you are using 1N5711 diodes in the RF detector, you can calibrate the power meassurement.Īpply known 1W of power on 7MHz and change cell 8 for correct value.Īpply known 10W of power on 7MHw and change cell 9 for correct value.
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