[TowerTalk] In Shack Tuner Vs. Remote Tuner for Multi-BandAntennas

[WA3GIN in King George, VA]

When did matchbox or coupler get replaced with tuner?

I thought a tuner was what was used to TUNE-IN AM and FM broadcast stations 
or one TUNES a VFO --- aren't these devices coupling RF from the feed-line 
to the feed-point of the antenna?  They aren't adjusting the resonance of 
the antenna, so what are they tuning?  ;-))

Have Fun,
dave
wa3gin

----- Original Message ----- 
From: "Jim Brown" <jim at audiosystemsgroup.com>
To: <towertalk at contesting.com>
Sent: Saturday, May 03, 2014 3:41 AM
Subject: Re: [TowerTalk] In Shack Tuner Vs. Remote Tuner for 
Multi-BandAntennas


> On 5/2/2014 11:54 PM, Roger (K8RI) on TT wrote:
>> Technically the tuner at the antenna is better, but with good coax and 
>> low bands it's hardly worth the effort, but look up the chart in the 
>> handbook for additional loss Vs SWR at a given cable loss. Basically, at 
>> 160, 75, and even 40, it makes little difference whether the tuner is in 
>> the shack or remote.   Unless it's a long run, if you are using good, low 
>> loss coax, the difference is likely only a few tenths of a db.  Look up 
>> transmission line basics  (20.1) in the current 2014 book.  This chart 
>> has been in there for years, so if you have a different version, just 
>> look gor transmission line basics.
>
> YES, YES, YES.
>
> 73, Jim K9YC
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