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Old August 18th 09, 03:46 PM posted to rec.radio.shortwave,rec.radio.amateur.equipment
dave dave is offline
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First recorded activity by RadioBanter: Jan 2009
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Default Can I use wirewound resistors to build an HF attenuator?

Ralph Mowery wrote:
"dave" wrote in message
m...
I need to lose about 5 dB from a 15 Watt exciter. Thanks.


Simple answer is no.

While you can build one with wirewound resistors , the normal formulars will
not usually work at RF and you will have a lot of inductance to deal with.
Even the socalled non-inductive resistors are only so at the audio
frequencies.



Can the inductive reactance be cancelled with capacitors? I'm mainly
concerned with 40, 30 and 20 meters.