No of course, I don't use the ATU on the 70 cm band, this tuner is connected to the Yaesu FT-857 which also has the 70 cm and while transmitting on this range the ATU attempts tunings but of course it does not reveal any impedance matching and goes into ambiguity alarm; Unfortunately the last time I raised the power in UHF from 2-3W where I don't have this phenomenon to 20 W something I think got corrupted in the firmware as it stopped working perfectly and then I hope to reload the program on his PIC 16F876.
73' Marco IZ0MFI
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