Run the power calibration.
73,
... Joe, W4TV
On 4/4/2024 9:03 PM, Pete Smith N4ZR wrote:
I just set the audio to be sure I'm hitting 4 bars of ALC,and the cycle
of adjust K-3 power to full expected drive to the KPA-1500 is now more
like CW, but the question remains - after I adjust the power a tiny
fraction in either direction, why does the K-3's output power drop way
back and relatively slowly recover?
73, Pete N4ZR
On 4/4/2024 7:41 PM, Joe Subich, W4TV wrote:
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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