I'm not necessarily defining a personal situation. But almost any 80 or 160
antenna will suffice as an example.
I am currently constructing a vertical for those bands. The model shows 2:1 on
160 at resonance and >3:1 just 60 KHz away and this is with considerable ground
loss. Less loss would equal lower BW. With quarter wave resonance on 80 at 3.6
MHz it exceeds 3:1 at 3.8 MHz and is nearly 7:1 at 4.0.
Transmission line loss is a non-issue with 7/8" Heliax.
On 4/21/2017 6:28 AM, Jim Miller wrote:
Wes
Can you describe your affected antennas?
73
Jim ab3cv
On Apr 21, 2017, at 8:56 AM, Wes Stewart <wes_n...@triconet.org> wrote:
A couple of points.
If you believe that an SWR of >3 necessarily degrades the efficiency of an
antenna, you are simply wrong.
If the "tuner" components have to be derated to this extent then perhaps it
should be called a line flattener rather than a tuner because a lot of guys are still
going to need a tuner.
On 4/21/2017 4:34 AM, j...@kk9a.com wrote:
The KPA1500 tuner range is fine. If your antennas have >3:1 SWR you need
to do some work outside. It will help your signal much more than the amp.
Even when I operated the RTTY Roundup in January after an ice storm my
antennas were within this amplifiers SWR range.
John KK9A
from: Wes Stewartn7ws
Fri Apr 21 01:18:59 EDT 2017
]
Not enough full power tuner range.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
