Yaesu FT-857D & Tuner Testing: At A POTA

I will finish up my video on putting the Yaesu FT-857D in service and using the LDG Z-100 Plus Tuner to get the antenna to match the 50 ohm impedance the radio wants to see. This has been a trial and error assessment of the two units working together and settings that go along with that.
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[@merxzone]

Great video I know the frustration. My 857 didn’t like the z100 tuner so I ended up getting the yt100 tuner and haven’t had any trouble. Good luck and happy hunting

[@pablop5937]

Great video!

[@gregjames189]

I think the fact that you could tune at lower power has more to do with the saturation of your transmission line transformer, than the tuner. Many antennas limit the power due to the TLT. I have two end feds, one will take up to 25 watts, CW 45 Watts, SSB. The other will take 200 watts SSB and 100 watts CW. The difference is not the wire, it is the TLT (balun). When in saturation the inductance of the antenna goes to crap.

[@terryadams8012]

I have the LDG IT 100 tuner. Use it on an Icom. On the Icom it has a cable from the tuner to the radio. Tuning is done by pressing the tune button on the radio. It does tune with the radio set at 100 watts very well and brings the swr to just over 1 on all bands. The antenna used with it is a 49:1 End Fed. Hope you have better luck with it in the future, I know how frustrating that can be.

[@tomprovo6204]

Hi there. I have an 857d with an LDG YT-100 tuner. My tuner is not the same one that you have but I believe that they operate in much the same way. The radio is packed away right now but as I recall the tuner uses the info from the CAT/Linear port on the back of the radio to make its tuning decisions and adjustments. In order to do this, the following settings should be made: #19, CAT RATE ="4800" #20, CAT/LIN/TUNER = "CAT' and #61 TUNER/ATAS = "OFF". And you probably already know this, but your coax transmission line will give you better SWR the closer it is to 1/2 wavelength long. If it is close to 1/4 wavelength long or odd multiples, you are going to have pretty messed up SWR readings. Good Luck!

[@Boriajob]

Hi there. Im having almost the same problem with my EFHW (inv. L) Before I've bought a tuner, I've noticed that on 160m, 80m my antenna is resonating a little off the HAM bands, 160 around 2 and a bit MHz, 80 about 3,9-4MHz, 40, 20, 15 under 1,5SWR on HAM bands, 12 meters some times under 1,5 sometimes about 2SWR, 10 meters about 2,5-3SWR, but for 10meters I think it's just cap issue, because I have got caps after wiring out antenna in my yard 🙃 well... this is not so big problem. Now I have an ATU LDG Z11proII. This tuner can "tune" the antenna to a almost or evenly to 1:1 SWR at 100W continous carrier, when in manual recomended up to 30W I guess 🤔 for a while - no problems, sometimes I have to retune from scratch, because of icing, on my antenna wire, sagging and etc. And yeah, at the end. The wire is about 42 meters long, but at the fastest way, i have just looped a few meters, its like you are looping, shortening your dipole antenna, just folding over excess of wire and straping with tie strips almost as feet