"Bill Turner" wrote in message
...
On Mon, 07 Feb 2005 11:00:46 GMT, "Highland Ham"
wrote:

For much higher power levels a metal enclosure will be better.
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May I ask why would metal be better than wood?
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At 1000 -1500 Watts RF it is better to keep thing within metal walls.

As I understand it ,in the USA any amateur radio station operating at an RF
power level in excess of 50 Watts needs to make a 'antenna radiation
assessment'
Although an antenna matching unit is not an antenna , sitting close to a
non-screened matching unit with air inductors operating at 1000 -1500 Watts
RF output ,seems to me rather too close for comfort.
For the same reason RF power amplifiers (even when home brewed ) are no
doubt inside a metal enclosure.

Frank GM0CSZ / KN6WH