If my memory serves me correctly, power calibration is done band by
band. I suggest you calibrate the amp PWR ADJ to agree with your LP=100
for each band. Be sure to use a 50 dummy load and NOT an antenna.
73
Bob, K4TAX
Message: 17
Date: Fri, 5 Feb 2021 16:06:10 -0700 (MST)
From: Lou W0FK<starma...@hotmail.com>
To:elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA-1500 power reading ?
Message-ID:<1612566370706-0.p...@n2.nabble.com>
Content-Type: text/plain; charset=UTF-8
Ed Stallman-2 wrote
The KPA1500 is new to me and very happy with my purchase . I'm using the
LP-100A watt meter and comparing it with the KPA-1500 they both read
close enough 10 to 160 . On 6m I'm seeing a bigger spread? with the
LP-100A reading 1500w the KPA-1500 is showing 1375w . If you look at
this in DB , it's nothing. I know the LP-100A is very accurate and the
only way to know for sure is to have Larry at Telepost test it. Most
likely wont do wont do that. Are their others that see a difference on 6m
?
Thanks Ed N5DG
I have the same setup Ed (KPA1500/LPA-100A). I've always seen a difference,
and never really paid much attention to it. When I read your email I ran
some very quick and dirty tests, here's what I'm seeing:
80M: LPA -- 1322, KPA1500 -- 1513
40M: LPA -- 1325, KPA1500 -- 1504
6M: LPA -- 1345, KPA1500 -- 1550
Pretty consistent with your 6M readings. Are you seeing much closer numbers
than mine?
73, Lou W0FK
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