[Elecraft] KPA-1500 ATU operation

[Dick Dievendorff]

On 160 and 80 meters, the KPA1500 ATU has 10 kHz "step size" between "bins".


Consider tuning at 3505, 3515, 3525, 3535, 3545.... thru 3995. There's a
table on page 52 of the KPA1500 owner's manual that lists the suggested
tuning frequencies on all bands.

73 de Dick, K6KR

-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On
Behalf Of charles at k5ua.com
Sent: Tuesday, December 10, 2019 15:04
To: elecraft at mailman.qth.net
Subject: [Elecraft] KPA-1500 ATU operation

After saving my KPA-1500 ATU impedance matching parameters on 80M at 20 Kc
intervals (3.510, 3.530, 3.550, 3.570, etc, etc), I expected that the
KPA-1500 ATU would automatically switch to the next set of L/C values at the
midpoint of the 20 Kc segments (like 3.520, 3.540, 3.560, etc, etc), but I
find that it switches randomly, sometimes just 2 Kc away from the main
tuning frequencies.  Does anyone have information on how the ATU is supposed
to work when it is polling the xcvr for frequency?

Thanks, K5UA
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