[TowerTalk] In Shack Tuner Vs. Remote Tuner forMulti-BandAntennas
Jim W7RY
w7ry at centurytel.net
Sun May 4 10:33:27 EDT 2014
Same reason a condenser was changed to a capacitor. More modern language.
73
Jim W7RY
-----Original Message-----
From: WA3GIN in King George, VA
Sent: Saturday, May 03, 2014 4:47 AM
To: jim at audiosystemsgroup.com ; towertalk at contesting.com
Subject: Re: [TowerTalk] In Shack Tuner Vs. Remote Tuner
forMulti-BandAntennas
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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