[Elecraft] Accuracy of Wattmeter W2 under 2 Watt

[Hajo Dezelski]

Hello,

I have been using a wattmeter from Fox for powers under 1 Watt, but
the display is too nervous and hard to read. So I stumbled over the
Elecraft W2 and read that with the 200 W sensor, you can read also
power levels under 2 Watt. This would be really helpful for I
experiment with power levels down to 0.5 mW.

So before I invest, let me just ask some questions:

1. Has someone compared the power indicatores for the levels of 100 -
1000 mW with a precise wattmeter? As far as I understood each led
signifies 100 mW.

2. If I would use the computer readout: How precise is the output?
Just 100 mW or ist it e.g. 147 mW?

3. I am working max. 10 Watt with the Kx3, but normally use only
between 100 mW and 5 W max. Could I adjust  with the calibration of
active sensor down to let's say 1 Watt instead of 2 Watt?

4. Is it possible to modify the transformer T1 and T2 of the sensor so
that the range would be (20W - 2 W and 200 mW. Or is there a sensor
like this available on request from Elecraft.

I know a lot of questions, but as far as I can see this meter would be
a real champion for QRPP and could be used with a WSPR TRX.

73 de
Hajo (DL1SDZ)

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Cela est bien dit, mais il faut cultiver notre jardin.