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Author Topic: What unit of measure does 10m20 mean?  (Read 833 times)
KF7NUA
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Posts: 153




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« on: September 10, 2012, 03:41:50 PM »

I was looking at a dipole on the net from a person from Belgium and all the lengths were written in this style of unit of measure 10m20
What does 10m20 mean?
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ZL1BBW
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Posts: 355




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« Reply #1 on: September 10, 2012, 03:48:07 PM »

Probably equals 10.2 metres.
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ex MN Radio Officer, Portishead Radio GKA, BT Radio Amateur Morse Tester.  Licensed as G3YCP ZL1DAB, now taken over my father (sk) call as ZL1BBW.
WB6BYU
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Posts: 13038




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« Reply #2 on: September 10, 2012, 06:20:47 PM »

Basically the units symbol gets used as a decimal point.

This particular usage, however, is somewhat ambiguous, as it could mean 10.10 meters, or
10.10 milli-something, because the metric prefix is often what is put in the decimal space.
For example 5u6 would be 5.6 micro (microfarads for a capacitor, microhenries for a coil, etc.)
Similarly, 56k seems obvious, but k56 would be 560 ohms (0.56k) for a resistor.

Using this scheme any value of  2 significant digits can be expressed as two digits plus
a standard multiplier character.
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