[TowerTalk] Matching network for wire antenna needed

[Paul Christensen]

Try and obtain either a CIA or VNA and sweep complex Z between the frequency extremes on both bands. 

Next, you can use TLW software and find combinations of C  and L for several common tuners.  Once you see the L and C extremes to obtain a match across the two bands, you can then select these component values. Over these frequency extremes you will likely exceed 2:1 SWR points and adding remote motors in a sealed enclosure will work well.  

To keep mechanics simple, I would first try an L network as only two controls are needed. TLW lets you try high-pass and low-pass L networks.  Hopefully, component reversal won't be needed. But the only way to know for sure is to first conduct the complex Z sweep measurement.  Once you know that information, TLW will take over, generally with very good accuracy. 

Paul, W9AC

Sent from my iPhone5
 
>> On 2014-09-14 9:45 AM, Gary Marks wrote:
>> I have an Inverted-L antenna for 80M & 160M and would like to make or buy a remote matching system that would work on both ends of both bands that would accept full power.
>> I built a system many years ago from a Doug DeMaw, W1FB, article in the May 1985 issue of QST but it has never worked as well as I wanted for whatever reason.
>> If anyone is interested, this article can be found at the ARRL QST archives http://www.arrl.org/arrl-periodicals-archive-search  by entering W1FB , 1985, May, QST.
>> 
>> Anyone have an idea of a matching system that would do all of the above ?
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