I believe that the KX3 does not have bypass relays in its ATU. Instead, when you select "Bypass", it sets the ATU to have no C or L added. If the ATU is not functioning correctly, perhaps with a stuck relay, it may still be affecting the measurements.

73 Bill AE6JV

On 7/11/20 at 10:05 PM, [email protected] (Frank O'Donnell) wrote:

As for Walter's point about the ATU, the results are mighty odd. I just set the KX3 to 40 meters with 15 watts out, appropriate slug in the Bird 43, set ATU to bypass and started keying. The power out dropped to about 5w. I then set ATU to auto and tapped the ATU Tune button. With the radio still set to 15w out, the Bird now peaked at about 25w! Is it plausible that antenna tuning activity within the KX3 could actually increase the TPO by ~5x? Or does that cast even more suspicion on the Bird?
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Bill Frantz        |The nice thing about standards| Periwinkle
(408)348-7900 |is there are so many to choose| 150 Rivermead Rd #235 www.pwpconsult.com |from. - Andrew Tanenbaum | Peterborough, NH 03458

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