Description ATU-100 EXT 1.8-50M 100W Open Source Shortwave Automatic Antenna
Tuner with Metal Shell Assembled
1. Has been authorized by the author N7DDC
2. Follow the author's design, C1-C7 adopts 500V Elec Fish Mica Capacitors
which are stable and reliable
3. Input power supply solid capacitor filtering, stable, safe and long life
4. The button on the front panel can be used to set antenna tuner's automatic
This button can be used to set antenna tuner's automatic mode. Steps:
1. Turn it on and long press TUNE button at the same time to enter mode
2. Release TUNE button, and switch automatic mode by pressing TUNE button.
3. After the adjustment is completed, shut down and restart through the POWER
switch on the back.
SMT Patch Welding: High reliability and strong vibration resistance. SMT
patch soldering can help you get rid of soldering a large number of patches
Imported Magnetic Ring Inductance Components: Adopt T68-2 imported magnetic
ring, stable and reliable performance.
Universal Double M Female Flange: Improve durability while ensuring stable
connection. Newly added rocker switch, easy to control power on and off state,
no longer need to repeatedly plug and unplug power supply.
Specially Designed Support Bracket: Simple and firm support, easy to put PCB
into the box for fixing.
Front panel's button can be used to set antenna tuner's automatic mode.
Input voltage range: 10-15V DC
Maximum working current: 400mA
Maximum working power: 100W
Maximum measurement power: 150W
Auto tuning trigger power: 5W
Minimum measurement power: 1W
Power measurement error: 20%
Maximum inductance: 8.53uH
Minimum inductance: 0.05uH
Maximum capacity: 1869pF
Minimum capacitance: 10pF
1 x Set of Automatic Antenna Tuner
It is assembled and ready to use.
Battery is not included.
The firmware is updated in September, 15th, 2020. Future versions are new
Due to its design, stable standing wave value cannot be measured when the
power is lower than 10W, so the adjustment work cannot be guaranteed. QRP radio
users please not purchase the product.
After turning on power supply, press and hold TUNE button and turn on power
switch at the same time. Release the TUNE button after hearing the sound of
relay. OPTIONS is displayed on the screen, after a short stay, it automatically
enters setting modes.
Description of Each Setting Item:
Auto Mode (ON/OFF):
If you plan to use the device without additional buttons, you can enable the
automatic mode by setting the value to ON. The default value is ON.
Show Loss (ON/OFF):
Indicating the power delivered to the antenna and efficiency of fider and
transmitter when input power is enough for correct SWR measuring.
Fider Loss (0.0-9.9):
This value uses for counting the power delivered to antenna. The loss value
can be found in the reference data for the used cable or you can measure the
exact value yourself.
Auto Delta (1.3-3.0):
The default value is 1.3. That is, when the automatic mode is activated, the
tuning process will be triggered when the SWR is above 1.3 and when it changes
Attention: ATU-100 Options are only for products purchased after November
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will contact you after your payment. Thanks for your understanding. Return Terms
1. If you receive defective item, please kindly notify us within 14 days. We
will guide you the returning instruction for replacement or refund.
2. If you purchased in improper condition, please NOTE that the sipping and
handling fee will not be refund, all return shipping fee should paid by the
buyer unless item DOA.
3. We reserve the right to refuse any returns for objective reasons. Custom
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item price or postage cost. These charges are the buyer's responsibility.
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On Nov-24-20 at 01:01:11 PST, seller added the following information: