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Subject:
From:
Scott Gillen <[log in to unmask]>
Reply To:
For blind ham radio operators <[log in to unmask]>
Date:
Thu, 29 Dec 2011 11:18:54 +1300
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text/plain
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text/plain (58 lines)
14lbs = 1 stone. and people I know in the UK use miles as well as kilometers. 

Scott
zl1chm / n0hok
Auckland New Zealand

Sent from my iPhone

On 29/12/2011, at 6:09, Howard Kaufman <[log in to unmask]> wrote:

> Let's see.
> I am going back to high school in my memory.
> 
> The metric system is a decimal system, rather like our money system.
> The basic units are
> Measurement of distance, the meter.
> The measure of weight the gram,
> The measurement of volume the leader.
> I think that distilled water with a density of 1 means that a leader of 
> water weighs 1 kilogram, but am not sure about that.
> 
> Most of the civilized world uses the metric system.  Therefore we in the 
> United States have to convert from metric to the old English system, which 
> the English do not use any more.  G-D knows how much this nonconformity 
> costs us every year.
> 
> A meter is just over a yard in length,  I think 39.1 inches.  making a 
> centimeter about .391 inches in length.
> The system was based on the diameter of the earth at the equator, which is 
> 10,000 kilometers.  I think that's right.
> 
> a Kilogram is about 2.2 pounds.  I have no idea how this compares to weight 
> in stone.
> 
> 28 grams of water equals an ounce.
> 
> The system was to calculate temperature in centigrade, with 100 increments 
> between the freezing and boiling point of pure water as measured at sea 
> level.
> 
> So if we were using the metric system, a half wave dipole, would be 20 
> meters in length, or 10 meters either side of the center feed point.  Since 
> a yard is less than a meter in length, and that difference is multiplied for 
> every meter, a formula to convert the length is necessary.
> So frequency in mhz, divided in to 468 gives you the total length of a half 
> wave dipole.
> at 7 mhz, 7 in to 46 is 6 with a remainder of 4.  7 in to 48 is 6 with a 
> remainder of 6.
> 7 in to 60 is 8 with a remainder of 4.
> This gives a figure of 66.8 total length, or 33.4 feet per side.  Since 
> their are 12 not 10 inches to a foot, this comes out to 33 and 4 tenths of a 
> foot, about 33 feet 5 inches.
> actually I think it's 33 feet 4.8 inches.  Close enough for government at 
> this frequency, but if you were working at 900 mhz frequencies, quite 
> critical.
> Others who know better can rip this little story to shreds.
> 

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