Having spent much of my life (Every Monday for nearly 23 years)
calibrating instruments in the lab, maintenance, QA and production, it's
normal for me to see readings I can believe in, whether that accuracy is
necessary or not. Other than those first few years in production I did
that until I went to college.
I think it's similar for many hams, although they don't realize just how
poor the accuracy of that equipment is and refuse to believe it when
shown. Generally, as I've said before, "It's good enough for who it's for"
I'm not asking for an answer to me or the reflector.
How many on the reflector can honestly say they regularly check the
power out when running the legal limit? Did you allow for meter error?
How often do you check? Have you ever had the meter actually checked
for accuracy?
How long since your multimeter was properly calibrated? What is its
accuracy when properly calibrated. What is the accuracy of your digital
multimeter? How about half scale? Is the accuracy a percent of full
scale, or of the reading?
Who actually measures output power withy care to stay legal, given the
accuracy of measurement.
How about close to the band edge? USB and LSB? Other modes? VFO accuracy
and stability. How wide is your CW? It depends on the speed.
How do you scale readings and accuracy?
There are many places where accuracy is important and many others where
it isn't critical if allowed for in the measurements.
73
Roger (K8RI)
On 5/4/2015 1:44 AM, Richard Solomon wrote:
You left out one important item, some folks need more accuracy at the test
bench. Proper alignment of the power chain requires it.
73, Dick, W1KSZ
On May 3, 2015 10:29 PM, "Mike Waters" <mikewate@gmail.com> wrote:
I can only think of a couple of situations where an accurate wattmeter
matters.
Some amateurs seem to think that a given increase in their wattmeter
deflection --or a corresponding decrease in their reflected power--
corresponds to an equal S-meter increase on the other end of the QSO.
It just doesn't work that way.
73, Mike
www.w0btu.com
On Sat, May 2, 2015 at 7:47 AM, John Simmons <jasimmons@pinewooddata.com>
wrote:
... Why are so many hams obsessed with accurate power measurements? Go
figure.
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
---
This email has been checked for viruses by Avast antivirus software.
http://www.avast.com
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|