1.8MHz-50MHz ATU-100 HF shortwave Antenna Radio Station Automatic Antenna Tuner
1. Compact appearance, outdoor portable, with housing, rugged and durable
2. With buttons, with 0.91 inch OLED display, resolution of 128x32 pixels, display at a glance
3. This product is both a Antenna Tuner and a power standing wave meter, supporting the display of standing wave value, forward power
4. This circuit contains a set of 7 inductors and 7 capacitors, which makes it can work in a wider frequency range, can effectively cover from 1.8MHz-50MHz amateur radio range
5. Maximum current consumption of 400mA, maximum operating power of 100W, maximum possible measurement power of 150W
ATU-100 automatic Antenna Tuner DIY open source N7DDC
The finished kit is hand soldered and provides 3.2 program support SSD1306 controller with 128x32 pixels resolution and 0.91 inch diagonal monochrome OLED display.
the circuit contains a set of 7 inductors and 7 capacitors which allows it to operate over a wider range of whisker rates and can effectively cover the amateur radio range from 1.8MHZ- 50MHZ.
Allowable supply voltage range: DC10-15V
Maximum current consumption: 400 mA
Maximum operating power: 100W
Maximum possible power: 150 W
Minimum power required to start tuning: 5 W
Minimum possible measurement power: 0.1 W
Measurement resolution at power up to 10 W: 0.1 W
Measurement resolution for power greater than 10 watts: 1W
Power measurement accuracy error: +10%
Maximum installation inductance: 8.53H inductance
Minimum installation step: 0.05H
Maximum installed capacitance: 1869 pF
Minimum capacitance installed step: 10 pF
Typical consumption: 100-200 mA
Currently optional features are 1w start tuning, 1 second screen self-extinguishing/normal light, fully automatic/manual mode, etc. The default is 1w start tuning, screen constant light, manual/automatic switching mode.
DC socket connected to the power supply DC 10-15V positive and negative, the panel POWER switch is in the open position, set the radio power at 5W-10W can, long press the RESET/TUNE button, the Antenna Tuner screen appears TUNE words, at this time the transmitter transmitting sustained power Antenna Tuner can be adjusted automatically. Short press the RESET / TUNE button day adjustment to release the previously adjusted LC relay, in the straight-through position.
The black and red terminal block is used experimentally for the adjustment of long-line antenna.
Ver1.21 version in the spare position on the motherboard to add SX1308 boost circuit ( this part of the components need to be purchased by the player ), can be reserved through the SMT Hummer plate to achieve the power supply mode switch. And add Auto Full Auto mode interface on the motherboard to facilitate the DIY mill. Note: Because of the noise interference that may arise after adding this DC-DC boost circuit, not as a basis for product quality issues. SX1308 is a fixed frequency, S0T23-6 closed current-mode boost converter, up to 1.2MHZ operating frequency makes the peripheral inductor-capacitor can choose smaller specifications, built-in soft-start function reduces the start-up inrush current. Internal integrated 80 milliohm power MOSFET, the highest boost efficiency up to 97%.
Power meter *1
Wire*1
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