Welcome to my website

[09.08.2010]

This website was created to share my love for the amateur radio hobby and the public services that are provided a service from the hobby. I welcome anyone who has an interest in comunications to study the material and take the test to become a qualified amateur radio operator.

Calculators

[09.08.2010]

The best part about Amateur Radio is assembling your own antennas from scratch. It's cheaper, and likely works better than a commercial equivalent for the same band. If Mother Nature decides to damage your antenna, (and she will... just give it time...), then repairs / rebuilding is just as cheap as the first time.

How long should it be? Figure it out below:

MHz

feet; inches; meters.

Ohm's Law

Enter any two values:

Volts

Amps

Ohms

Watts

Jpole Calculator (1/2-Wave)

NOTE: Attach center conductor to the "Long section." Shield attaches to the short section.

Enter The Center Frequency

  Freq MHz

Long section dimension is:	feet,	inches,	meters.
Short section dimension is:	feet,	inches,	meters.
Feed point dimension is:	feet,	inches,	meters.
Spacing dimension is:	feet,	inches,	meters.

Inside (spacing) dimensions are metal to metal measurements, NOT center to center.
The caculations are based on 1/2" diameter copper pipe.

A choke very close to the feedpoint (within 3-4 inches) is highly recommended to prevent RF from heading down the feedline into your rig. For the 2-Meter band, four turns of coax at 5in diameter should suffice.

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