[Elecraft] Re: Updated Version of Elecraft Keying Mod

Fri Apr 9 03:55:02 2004

It was NOT the rise time. It was the leading edges, the sharp little
edge or corner at the BEGINNING of the rise time, and the BEGINNING of
the fall time, that were causing the clicks.

The problem was with the SHAPE of the rise time, not the amount or
length of rise time.

73, Guy.

----- Original Message ----- 
From: "John, KI6WX" <[email protected]>
To: <[email protected]>
Cc: "Guy Olinger, K2AV" <[email protected]>
Sent: Friday, April 09, 2004 1:09 AM
Subject: Re: [Elecraft] Re: Updated Version of Elecraft Keying Mod

>
> ----- Original Message ----- 
> From: "Guy Olinger, K2AV" <[email protected]>
>
>
> > The leading edges were the killer in the K2. That's basically what
> > Wayne fixed.
> >
> I have trouble believing this statement.  It is well known from
circuit
> design engineering that a faster risetime or falltime creates a
wider
> bandwidth signal.  The risetime of the original K2 keying circuit
was 3
> milliseconds and the falltime was 2 milliseconds.  So how does a 3
> millisecond risetime create more key clicks than a 2 millisecond
falltime?
>
> -John
>  KI6WX
>
>
>