This is typical for those who insist on not running data modes with 4-5 bars of ALC. You are not providing enough audio and the K3/K3s needs to engage the expander (additional audio gain) in order to achieve enough drive to reach the set power level.
73, ... Joe, W4TV On 4/4/2024 6:21 PM, Pete Smith N4ZR wrote:
I have a K-3 driving a KPA-1500, and have started seeing some strange behavior. After I adjust the power level control on the K-3,. even a little (like 33 to 31 watts), the driving power delivered to the KPA-1500 starts much below the K-3's indication, and only gradually increases to what would be expected at the K-3's power setting. This behavior is apparent in CW, but is more dramatic in FT* using TXData, where it can take several 12-second transmit intervals to reach full power. Touch the K-3's power control even a little, and this cycle starts over again at reduced power, gradually returning to full.
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