[Boatanchors] 75M

[D C *Mac* Macdonald]

I'd say that your solution would be to experimentally 
determine multiple locations for taps on the coil that
will give satisfactory VSWR at desired frequencies, say 
every 50 kHz on the 80/75 meter band. Doing so would most 
likely keep your maximum VSWR around 1.7:1 or less. 
 
Folks who use true bugcatcher mobile antennas do the same 
due to the extremely high "Q" of the coils used there. 
 
* * * * * * * * * * * 
* 73 - Mac, K2GKK/5 * 
* (Since 30 Nov 53) * 
* Oklahoma City, OK * 
* USAF, Ret (61-81) * 
* * * * * * * * * * * 
 
 
 
 
 

> Date: Mon, 14 Nov 2011 10:33:35 -0500
> From: dhallam at knology.net
> To: boatanchors at mailman.qth.net
> Subject: [Boatanchors] 75M
> 
> In all the many years I have been a ham I have almost never been on 
> 75M. I have a Butternut 6HFV vertical antenna which uses a base loading 
> coil for 75/80M. This gives it a VERY narrow bandwidth. I just scanned 
> the swr and find it is 1.2 at 3.750 MHz with a 2.0 bandwidth of +/- 45 KHz.
> 
> This leads to my question of where are the most active areas of SSB 
> activity given that I am going to have only about 90 KHz of bandwidth to 
> work with?
> 
> David
> KW4DH
> 
> -- 
> "There are two means of refuge from the miseries of life. Music and cats." ~ Albert Schweitzer ~
> 
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
> 
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com ** 
> 
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html