A couple of comments to Bill Stevens contribution:
Small attenuators: As you get to powers >100W, your peak voltage
exceeds 100V. The small attenuators might be ok. for average power
at a low duty cycle, but will they arc??.
I rather play it safe and use a large one.
RG58U: Attenuation depends on frequency and cable material. At 1GHz
they range from 14.5 to 21.5 db. per 100 ft (Belden). So if you need
to know, it's best to measure it.
All fer now
Cheers Rolf
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Rolf Tschudin Tel. 1 301 496 2692
National Institutes of Health Fax 1 301 496 0825
Bldg. 5, Room B2-29
Bethesda MD 20892-0505 e-mail: tschudin@nih.gov
USA Compuserve: 71543,751
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