K3 Hi SWR when sending CW

[vk4tux]

http://hamgineer.blogspot.com.au/2012/05/swr-changes-when-i-increase-my-tran
smit.html

Testing fwd & ref pwr ratios with a Bird 43 at both pwr levels would be
interesting for a better comparison;

http://www.bird-technologies.com/~/media/Bird/Files/PDF/Products/manuals/920
-43.ashx

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[Barry]

The first link is particularly relevant.  My antenna is on a balcony, surrounded by metal.  Metal railing, making up cap to balcony wall several feet below wires.  Metal mesh in building wall (stucco), about 5 feet away.  Commercial grade metal studs in building walls.

Guess that's why the current balun didn't work.  Moving the antenna is not an option.

Barry W2UP

[Vic Rosenthal]

Three suggestions:

1) Add a choke balun close to the rig.
2) Add 10' piece of coax to feedline.
3) Add 1/4 wave wire from ground terminal of radio to establish ground reference (about
10' for 12 meters). Be sure it is insulated, and end should not be accessible to people or
animals.

You can do all of these if necessary.

On 10/5/2012 4:24 AM, Barry wrote:
> The first link is particularly relevant.  My antenna is on a balcony,
> surrounded by metal.  Metal railing, making up cap to balcony wall several
> feet below wires.  Metal mesh in building wall (stucco), about 5 feet away.
> Commercial grade metal studs in building walls.
>
> Guess that's why the current balun didn't work.  Moving the antenna is not
> an option.
>
> Barry W2UP

--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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