[Elecraft] KBPF3 usefulness or effectiveness?

[James Sarte]

Hi Guy et al,

I was more or less curious about how it worked.  I do hear a relay clicking
somewhere around 7400 kHz, but I do not recall seeing or hearing an
appreciable change in s-meter readings or AF levels.

I'm sure it works fine in the lower broadcast bands though.

James K2QI

On Mon, Dec 28, 2009 at 11:26 AM, Guy Olinger K2AV <olinger at bellsouth.net>wrote:

> If the AGC is being used, any difference would be seen in the S-meter,
> not the AF output, unless you live in an extremely quiet location and
> you're trying to copy 40m BC during the day.
>
> My KBPF3 switches in at 7.385. If you turn the AF gains to minimum in
> a quiet room, you will hear the relay kick in/out the KBPF3 as you
> tune across the switch-in points. Mine switches before the ham band
> filter adds any noticeable loss, as there is no sudden change in any
> level.  Very smooth.
>
> Were you having trouble hearing a station or just curious about the
> way it operates?
>
> 73, Guy.
>