Fun Facts

Interesting information about amateur radio.

VHF Propogation Map

The ARRL posted a link to this on their Facebook page.

The map shows activity that has happened in the past hour. Paths are combined to create color-coded footprint indicating the distance VHF signals are likely to be traveling. Packet stations typically run low power into small vertical antennas. Better equipped stations should exceed the the distances…


The Birds and The Bees of SWR Knowledge Part 2

6 and 10

Attached is a possible multi-band antenna from the MARCH 2015 issue of
QST  to put up in the attic to be able to get yourself on 10 and 6 meters
quickly and easily to try them out.  Uses the two conductors of 450 ladder
line to make a dual band antenna, such as 10 m and 6 m "in one flexible,
cheap, unit."  Doc's (W8NRH) sea stories suggest 6 m SSB (SSB is typically
horizontal  polarization, FM is typically vertical  polarization for mobile
work, BUT, contacts CAN be made both ways) can open up and be worked on a
'wet noodle' of an antenna!

Early FM Mobile Radio Tests

Here is some of the developmental history from 1941 of how FM as we
know it today got started and tested by GE, with FCC Engineers in tow. FM
was only invented 1935 by Major (name, not rank) Edward Armstrong. Of note
is that these FM mobile radio tests started at +15 kHz FM deviation and on
40 kHz channel spacing! That means it was only re-farmed once in the mid
1960's to what was called "Narrowband" of +5 kHz FM deviation and to 20
kHz channel spacing on VHF Low-Band (30-50 MHz), which was called "UHF"

FCC Bites in OH; EMA Notes

First, just when you think there is no FCC Enforcement action and/or

Before the Federal Communications Commission, Washington, D.C. 20554
In the Matter of Daniel R. Hicks,  Licensee of Amateur Radio Station
KB8UYZ, Cincinnati, Ohio

The Birds and The Bees of SWR Knowledge

So much good discussion about SWR (Standing Wave Ratio) lately on the
Repeater, and to get some new Hams off to a good start on the right foot,
here are some facts your parents should have told you (presuming they were
Hams and knew better themselves when they were kids....).

Line A

Do you know the infamous FCC's "Line A" does run through the northern
tier of Ohio?  What does it mean to you and your operations on 420-450 MHz?
Even though Union County is not within Line A, there are other issues and
(such as Commercial Licenses by the FCC in the 420-430 MHz sub-band, and
Canadian Primary status in the 420-430 AND 440-450 MHz sub-bands) that we
must "not cause interference to."  Just a little known, little used set of
rules that could impact your operating in Ohio that we need to keep in

FM, The New Fangled Fad

And a reminder that what we use or are so accustomed to today isn't even 100 years old yet...

 Today in Radio History:

 June 14, 1922 WEAR, Baltimore, broadcasts President Harding's speech at the dedication of the

Francis Scott Key Memorial, the first time a U.S. president has been broadcast live.

 June 16, 1934 Armstrong transmits FM signal 70 miles from Empire State Building to Long Island

Some Coaxial Cable Facts and Trivia

A little data from Wiki.  The 1/4 wave antenna impedance is ~ 36 ohms
resistive (at resonance), and a 1/2 wave dipole cut-and-fed in the middle
(1/4 wave to each side) as a nominal 73 ohms of Radiation Resistance (left
as the "impedance" where XL and XC cancel each other out), where as the 1/2
wavelength antenna, fed at the end, is a very high (>3,000 ohms) impedance
antenna and seldom used for that reason (exception:  thru-the-glass
antennas and their special and unique conditions*).  From there, I have

Lightning Rod Facts vs Myths Information

Lightning rods attempt to discharge the voltage build-up between earth
and sky/cloud before the flash-over potential gets reached causing
lightning.  How fast one or several pointed lightning rods can accomplish
that movement of a mass of electrons from earth into the sky to reduce the
voltage differential (think of it like discharging a capacitor - a little
bit over time through a resistor, or "all at once" through 0.1 ohms) is the
issue to leave not-enough voltage differential to achieve the catastrophic

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