On 80 meters where the LDG did not do so well, neither did the ATU-10. Where ever the LDG provided a match, so did the ATU-10. As for the matching, I can say it works as good as or as bad as my LDG Z-100 Plus. But, the ATU works without the interface cable, it’s just not controllable from the radio. The needed interface cable is nothing more than a stereo audio cable with 1/8″ male plugs on both ends. You may have to give it a few minutes for the batteries to take a little charge, but from that point on just leave keep the ATU-10 connected to the USB cable. If you forget to charge the battery and go on site with a dead battery, you can supply power to the ATU-10 via the USB charging cable. The package DID NOT include the interface cable for the Icom 705 nor did it included any paperwork…….no manual! My battery showed about half charged and firmware version 1.4 was installed. The package contained an Allen wrench and a USB cable for charging the battery as well as for updating the firmware. There is a very good demo posted on YouTube. I did not provide a link for ebay because some ebay adds are dated. I ordered the above pictured ATU-10 from. So the hunt was on for a small ATU with internal batteries and BNC’s instead of the dreaded SO-239 connectors. I do want to get my hands on an Elecraft T1 ATU but Elecraft can’t get the parts from the manufactures to make them. Everything I have relating to QRP operating uses all BNC connectors, including my home brew two position antenna switch. Another downside is it uses SO-239 connectors instead of BNC connectors. Size matters to me and the LDG ATU is too big. Most of the time I turn the LDG off by toggling between bypass and tune using the button of the front of the unit. Now I only tell the LDG to tune where needed. I resolved this by not using the interface cable. My biggest complaint is, when interfaced and the IC-705 tells the LDG to tune and it does not know the antenna is matched and resonant, the LDG adds capacitance and inductance which actually raises the SWR. The unit does as advertised but I am not impressed with its performance.
Antenna tuner plus#
I did purchase the LDG Z100 Plus 705 with interfacing cable. I can not always erect this antenna in the clear. One example is when I use my half wave end fed 40. There are times I find myself in need of an ATU. Many thanks to Barry (KU3X) for sharing the following guest post originally posted on his website:
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