I experienced the same thing, especially on 20M. The tuner is
apparently ignoring some of the signals on the AUXBUS line. I put a
scope on that line. I can see, some of the time, the amplifier
responding to the signal with a "clunk" as the tuner relays adjust to
the new segment. The rest of the time, I see the signal, but no
response from the amp. If you attempt to transmit when the signal is
ignored, you get chattering relays followed by "ATU Retune Complete" on
the amp display. I took a photo of the signal trace and sent it to
Support yesterday. They haven't gotten back to me yet.
Walt, WA1KKM
On 2/21/19 3:36 AM, Peter Dougherty wrote:
Hi all,
Something I noticed this past weekend in the contest about the KPA1500,
especially on 80 and 160, where the internal tuner was needed on antennas
that were above ~1.5:1 SWR. When I changed frequencies into a range that
required retuning, I had to manually press the ATU control and initiate a
tune sequence, or else when I was auto-sending CW my call would get cut off
as the tuner set its needed values.
Since I'd memorized the entire band(s) ahead of time, is there a way for the
memorized tuning solutions to load on QSY, rather than on RF application? It
really slowed me down as I was S&Ping my way through the low bands on Friday
night.
---------------------------------------------
73 and Good DX
Peter, W2IRT
President, North Jersey DX Association
DXCC Card Checker
Letter O Manager, ARRL Incoming 2nd District QSL bureau
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