What makes a good propagation beacon?

 

ANSWER: When the beacon does what it was intended to do…. serve as an indicator of directional band openings and to provide data for propagation studies……

 

Which message characteristics have an effect on how well the beacon operation accomplishes the objective? ( band openings & propagation study data )

 

ANSWER: All of them……. But more specifically……. WPM  & MESSAGE COMPOSITION .

 

  WPM…….. Too fast or too slow……. What’s about right?....

 

     If band conditions are marginal the speed should be sufficient to hear the complete call on the “peaks” between the deep fades or noise. …. Requiring a  somewhat  faster WPM .                            

 

       WPM too fast and the listeners with limited CW copy ability will be left out….Too slow causes the message to be too long and can be missed by    experienced listeners or during deep QSB.     See "long time listener" below

 

COMPOSITION…..  The Call should be repeated often enough that a person is able to mentally re-construct the message amid marginal conditions, backscatter or aural propagation “flutter”.

 

Key down between messages….   ......Beacon messages with long "key down" conditions are easily missed because the signal is often mistaken as from an "intruder" AM heterodyne

 

The most important part of the message is the call sign of the beacon operator.  If the Call can be copied correctly all other information can be obtained via call books or the internet.

 

Location identifier……included for quickly determining the direction of the propagation.  …...  It should be short like either the State abbreviation or the four digit grid square.  I like the 2 letter State abbreviation as the identifier....... Field day Ops, mobile or camper/ hikers rarely have access to a grid square map..... 

 

The FCC part 97 no longer requires that a “slash B” or a “slash BCN” be included with the Call……. See  97.119  Station  Identification.

 

Long messages with extraneous information should be avoided ….. This is very important during periods of low sunspots. 

 

As a long time listener:

 I have found it helpful to include both the “DE” and “/B or /BCN” in the message…. This makes identifying the Call much easier by hearing both the beginning and end of that part of the message. Kinda like providing "brackets" around the call.

 

The “gap” between message repeats should be no more than 4 or 5 seconds…. This is long enough that another beacon that was unheard before can be heard within the gap space…… still short enough that a person tuning the frequencies slowly will not miss the message. This is especially important as the "automatic control" segment of the beacon band has become more crowded.

 

A WPM speed of 10 to 13 WPM seems to be the best for all around copying of the message.

 

What seems the easiest for Me to log is a message typically like the following :

 

NY  NY  NY  DE K2ABC/B  K2ABC/B K2ABC/B  (4-5 second gap)” repeat  

 

CA  CA  CA DE W6ABC/B  W6ABC/B  W6ABC/B ( 5 DITS a second apart)” repeat

 

DE AF5BC/B  AF5BC/BCN  AF5BC/BCN  AF5BC/BCN  EM16  EM16  EM16 ( 5 DAHS a second apart)" repeat

 

Or about any combination of the above examples………