Ian, G4ICV, AB2GR wrote
>
> That 70.4 Volts peak to peak is 12.4 Watts; my Heathkit meter is
reading low.
But probably within its tolerance. 10 watts would be ~63.2 volts peak to
peak, so you're reading less than 1 dB high.
How accurate is the scope? And how much do you need that dB? (gri
On Tuesday 21 February 2006 18:25, Don Wilhelm wrote:
> An RF Probe or 'scope to measure the RF Voltage along with an accurate
> non-reactive 50 ohm dummy load will provide much better accuracy (except
> when the wattmeter has been properly calibrated at the power output that it
> is being used to
Ian,
That just amplifies my distrust of wattmeters. If you were on a 100 watt
scale and the wattmeter spec is as good as 5% of full scale, you could
expect an error of up to 5 watts (either high or low) - most amateur grade
wattmetrs are speced for 10% of full scale (or even 20% in some cases), s
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