[Drake] Roofing Filters

[Steve Thompson]

On Sunday 15 August 2004 19:05, Bob Camp wrote:
snip
>
> Pop the antenna on the radio and make sure the noise out of the radio
> goes up when you are tuned to a quiet part of the band you want to use.
> Stick in a 10 db pad. Does the noise still go up? if so keep stepping
> up the pad.
>
> Once you have a pad that keeps you from hearing antenna noise back off
> by 10 db. Most of the time you will find that you have a 10 or 20 db
> pad on the lower HF bands and a 10 db pad on 20 meters. Of course this
> trick only works if the band is open....etc.
Hurrah!!!! Well put, Bob.

Unfortunately, it's a forlorn task trying to convince the average ham that, 
often, a pad will improve their receive performance. I know so few who really 
understand what makes a good receiver, and what limits it.

Cheers,

Steve