[SixClub] 6 meters AM

[KA2AEV at aol.com]

WOW
You're good!
 
 
In a message dated 6/25/2009 7:09:33 A.M. Eastern Daylight Time,  
k4rw at lowcountry.com writes:

George,

As I'm sure you're aware, this mode has 3 distinct  components of the 
signal.
Two distinct sidebands of modulation component  (USB & LSB), and a carrier
are present during transmit. This requires  antennas that are capable of
radiating each component. The best arrangement  is using either a 2 antenna
stack or a 3 antenna stack. The latter is  considered the best choice as it
will equally radiate the two modulation  components, each from its own
antenna, plus the carrier from its own  antenna. The 2 antenna stack works
well but you will have some degradation  of the signal levels on the two
sidebands. This is due to only one antenna  of the stack sharing the
radiation of 2 sidebands while the other antenna  is radiating the carrier.

If you have a Shure 444 or 450 microphone,  place the extendable neck of the
microphone in the middle of its length of  travel. These microphones are
designed to be fully extended for USB and  fully lowered for LSB. Using the
middle will allow for the use of both  sidebands and provide better audio on
AM.

So there you have it. My  secrets are out.

All kidding aside, the antennas used for SSB or CW  also work quite well on
AM mode. No special "mode based" antenna is  required. However, the
polarization does make a difference if you want to  talk with someone close
to you. Then your respective polarization should  match for best signal
strength.

Roger,  K4RW



-----Original Message-----
From:  sixclub-bounces at mailman.qth.net
[mailto:sixclub-bounces at mailman.qth.net] On  Behalf Of George Clark
Sent: Sunday, May 24, 2009 11:11 AM
To:  undisclosed recipients:
Subject: [SixClub] 6 meters AM

Those  that run AM on 6 meters. What do you use for an antenna?
Beam,Dipole? I've  never tried it. Those that use dipoles,Could you give the
measurements for  it?
George



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