Tuning in the AUTO mode (briefly touch RB1, pin 22 on the microprocessor, to ground) will enable automatic retuning whenever the frequency is changed. Auto mode is memorized in nonvolatile memory until that pin is grounded briefly again. Apparently this unit is delivered in the default Manual mode requiring explicit TUNE press whenever retuning is required. There's lots of info about the ATU-100 operation online.
Thanks for the video, I have the same configuration - tuning in AM seems to work for me. The idea with the Velcro is interesting, I will probably do it that way too. Which antenna do you use? 73 de Roman HB9XBK
Put it in the RTTY mode. That works better. I just purchased the ATU-10 which is the baby brother to what you have. I really like it. You can't beat the price. Barry, KU3X
Unless you need it portable, the first thing to do is to remove the battery and charging circuit and replace it with a linear 12V wall wart. The battery up converter produces terrible hash on some frequencies
How much power were you putting out when tuning. What is the min power it will tune with. How do you ensure you don't blow the finals whilst tuning. Answers much appreciated
@@McPilot_W3DDS The instructions I have seen say no more than 10W to tune! Minimum to tune is 5W, tunes perfectly on 5W and it does not strain the finals.
Hi! I have one ATU-100. The Power reading doesnt seem correct in SSB (I put 100W in my IC-718 and the ATU only shows 11 ~ 12W), does yours read it as it should or it shows a little bit less of power output?
@@McPilot_W3DDS The swr reading its about 1.5 without the tuner, after tunning its gets around 1.1. It seems to be tunning ok, I just suspicious about the power reading in SSB 😅
@@McPilot_W3DDS I find out the problem, the problem is my power supply, it isnt powerfull enough for my radio.. so the reading is right.. I'm going to purchase an 20a or more power supply. Thanks :)
@@McPilot_W3DDS what type of ac adapter did yours use? Does the unit come with a USB adapter? As I’m looking at the one you used on You Tube and there’s another one available that you can plug into the wall with a 12 VDC adapter.
@@robbsanderson3572 Any USB power source like a phone charger. I have both versions of this tuner. The one you are interested in I have connected to my standard 12v power supply via power poles
@@McPilot_W3DDS That’s interesting as I wasn’t sure if an iPhone charger would be enough to charge the internal battery in the one model. So I was looking at the other model which you can plug into a wall outlet with the 12 VDC . Where is a good source for getting the directions for AT 100?
@@McPilot_W3DDS Thanks for answering. At 7:06, before you tuned, the swr read 9.9, so I assume it will at least match 10:1? Am i understanding correctly? Still new to some of these things. Only started playing with hf about 9 months ago. Thanks! KE8LIB.
