[Lowfer] UWL station pics and measurements

[Bill Ashlock]

"Bill, please be nice :)"

But it's Friday, Eric :) (Remember the good old days when the Fridays came around?)

I think Jay covered the variometer details nicely but just in case you forgot: P = I x E.
So your input power is only about half a gallon :)

73...

Bill 


> Date: Thu, 10 Feb 2011 22:22:27 -0600
> From: esmithmail at gmail.com
> To: lowfer at mailman.qth.net
> Subject: [Lowfer] UWL station pics and measurements
> 
> Ok.  I have the numbers, perhaps you can help me interpret them.  Most of
> you know when it comes to analog what I don't know would fill volumes.  I do
> have fine success building and programming digital projects since anyone
> with a third grade education can do that.  But certain aspects of real
> electronics have always escaped my understanding.  So please bear with me:
> 
> I took this picture of UWL today at noon:
> http://www.nutstreet.net/images/lowfer/UWL-daytime.jpg
> 
> The final is covered by snow and located inside the void of that brick the
> loading coil is on.  The solar panel is not resting on the ground, there is
> actually a red brick under it but it is hidden by snow.  I didn't have time
> to take measurements then but I wanted to get the picture at that time
> knowing it would be dark by the time I could actually take the readings.
> 
> Here is a picture of the input voltage to the final during key down -- shows
> 12.37 VDC:  http://www.nutstreet.net/images/lowfer/UWL-voltage.jpg
> 
> Here is a picture of the final current during key down -- shows 0.038 A:
> http://www.nutstreet.net/images/lowfer/UWL-current.jpg
> 
> The reason I have the meter on that scale is an open fuse on the uA/mA scale
> :(
> 
> Inside the final enclosure and in-line with the DC feed is a non-inductive
> 0.1 ohm resistor of fair precision that I use to compute output power in
> watts.  But it would be difficult and disruptive to open up right now to get
> my probes on that.
> 
> So what do you think?  I'm interested in any and all feedback, good and bad
> (Bill, please be nice :)
> 
> Eric  KD5UWL / WD2XFX
>  -- UWL is on 185302 Hz, QRSS30, at EM15gp
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