Give a man a wattmeter, and he'll know down to the milliwatt how much power he's running.
Give him two, and he'll never know how much power he's running...
(with apologies to the time-honored saw about watches)
73,
-- Dave, N8SBE
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On 2023-09-12 07:07, Bruce Akhurst wrote:
On Tue, Sep 12, 2023 at 02:35 AM, Chris wrote:
Obviously totally useless.
Chris, G5CTH
I'm sure its useful to you so be happy.
FWIW? ?
A 1 : 1:05 SWR implies a? voltage reading across '50 ohms' that's 5% different to nominal/expectation for that power level.? That 5% measurement error becomes 5% squared (10.2%) as you move to reading power.? ?Add your scope error and your power calculation can easily be 15 to 20% out unless you have a way to calibrate your entire measurement system individually.
This would not work at all in a professional environment but in amateur use of course you can decide what's good enough for you.? ?
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