[Elecraft] Rescaling the W2?

Cliff Frescura cf at cfcorp.com
Fri Nov 20 10:15:25 EST 2015


I find the scaling awkward as well.  My W2 is placed on the input side of my
KPA500 and it seems that dividing the scale by two might do the trick.  I've
not looked at the schematic, but wonder if it could be tricked by a resistor
divider in the sensor line.

73,

Cliff K3LL

-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Don
Wilhelm
Sent: Friday, November 20, 2015 5:55 AM
To: Scott Townley; elecraft at mailman.qth.net
Subject: Re: [Elecraft] Rescaling the W2?

Scott,

I believe that would require a new sensor and firmware to support it.
Popular scales on wattmeters are 200 watts and 2000 watts full scale, so you
are not going to get much better with another brand product.
The W2 used with its utility program can give you more resolution, but then
using the Utility when mobile would not be advisable.

73,
Don W3FPR

On 11/20/2015 8:32 AM, Scott Townley wrote:
> I know the W2 can be "dialed in" to match one's personal standard, 
> but...can it be completely rescaled?
> I use the K3/KPA500/W2 mobile, and the KPA500 is mounted in my pickup 
> bed so the W2 is the only system meter available at the operating 
> position.  However, the 2's scaling doesn't give me much display 
> dynamic range...the KPA500 will only light 5 of the 17 LEDs at full 
> power.
> It would be far more useful for me to have the meter scaled to 600W 
> say...then the 15th LED would be 450W.  Even scaling it to 1000W would 
> give me more than half the display range.
>
>

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