----- Original Message -----
From: "Jim & Carolyn Kingsbury" <kingsburys@bellsouth.net>
To: <Topband@contesting.com>
Sent: Thursday, March 02, 2006 11:32 AM
Subject: Topband: 2 Queations
> Has anyone measured or tried the tv cable splitters on the low frequencies
> (1.8 thru 10 Mhz)? I wonder if they will work to combine 2 RG-6 phasing
> lines from pennant or flag antennas to a feed line to the shack. The one
> I
> looked at said for 5 to1000 Mhz but I'm not sure if that rules out 1.8 Mhz
> or not.
>
Performance is generally not too good below 5 MHz, Jim. To
squeeze 7 1/2 octaves of bandwidth out of the magic-T splitter
you have compromise the low-end performance a little to squeeze
and get good performance at 1 GHz. The CATV splitters I used
to measure were barely making spec at 5 MHz. Isolation and
VSWR at 2.5 MHz would probably not be much better than just
using a T-connector. Also, power handling of CATV splitters will
be very low. The dump resistor in the hybrid is typically no more
than a 1/8 watt rating, and the ferrite binocular core used for the
transformer is usually no bigger than 1/2 a pencil eraser.
73, Mike W4EF.........................
_______________________________________________
Topband mailing list
Topband@contesting.com
http://lists.contesting.com/mailman/listinfo/topband
|