Thanks Don!
I aggree with you.
I used to calibrate RF-electro-surgery devices in a former life :)
Thanks for the tip on the non-reactive power resistor.
I think I will look to get one.
Good stuff!.
Duane
On Mon, 20 Jul 2009 21:07 -0400, Don Wilhelm w3...@embarqmail.com
wrote:
Duane,
While
dw wrote:
Some day a smart ham is going to manufacture and sell a mico-chip based
watt-meter which the user can calibrate himself using a bird meter
Someone already has and does. It's called a W1 and it is sold by
Elecraft. I have one, mine is in a nifty polycarbonate case from W8FGU,
and
And same for the upcoming W2 :-)
http://www.elecraft.com/manual/W2%20Data%20Sheet%20rev%204sm.pdf
73, Eric WA6HHQ
Fred Jensen wrote:
dw wrote:
Some day a smart ham is going to manufacture and sell a mico-chip based
watt-meter which the user can calibrate himself using a bird meter
If I am correct, most manufactures claim a 10% tolerance on most
d'arsonval type watt meters.
I believe there are also some caveats.
That 10% is at a specified level of applied wattage, and of course
applied into a 50 ohm load.
This means that at 100 watts applied power, the meter can read +/- 10
Duane,
While you are correct on the meter movement specs, take a hard look at
the wattmeters available to hams.
The LP-100 wattmeter does almost what you are referring to. It is quite
accurate when calibrated.
I have a general mistrust on analog reading wattmeters. Many wattmeters
on the
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