Towertalk
[Top] [All Lists]

[TowerTalk] 75 ohm coax matching

To: <towertalk@contesting.com>
Subject: [TowerTalk] 75 ohm coax matching
From: k6ll@juno.com (David O Hachadorian)
Date: Mon, 07 Jul 1997 10:57:23 EDT
On Mon, 7 Jul 1997 09:37:20 -0400 (EDT) TexasRF@aol.com writes:
>A little known and used method of matching 50 ohm loads and sources to 
>75 ohm
>coax is the "series transformer". They are by their very nature single 
>band
>devices but there are applications as they allow the 75 ohm line to be 
>any
>desired length.
>
>Basically the series transformer in the 50 to 75 ohm case boils down 
>to a 30
>degree length of 75 ohm coax followed by a 30 degree length of 50 ohm 
>coax.
>At the radio end, the reverse is done: 30 degree length of 50 ohm coax
>followed by 30 degree length of 75 ohm coax. Ain't science wonderful!? 
>Try
>it, you will like it! 73 de K5GW

This approach was just detailed in the June, 1997 issue of
QST, page 43. It's pretty neat, at least for a single band.

Dave Hachadorian, K6LL
k6ll@juno.com

--
FAQ on WWW:               http://www.contesting.com/towertalkfaq.html
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm

<Prev in Thread] Current Thread [Next in Thread>