[Elecraft] SSB output overshoot

[Geoffrey Mackenzie-Kennedy]

Have you any thoughts about what might be causing Don's K2/100 to behave 
when he switches the display from RF to ALC? I can see how the ALC might 
'hunt' on SSB, but switching the display should not make any difference to 
ALC action I would have thought.

73,
Geoff
GM4ESD

----- Original Message ----- 
From: "Steve Kavanagh" <skavanagh72 at yahoo.ca>
To: <Elecraft at mailman.qth.net>
Sent: Wednesday, November 01, 2006 1:55 PM
Subject: Re: [Elecraft] SSB output overshoot


>I think Don's observations sound like the problem I
> and a few others have had. See, for example the
> symptoms described here:
>
> http://www.ac6rm.net/mailarchive/html/elecraft-list/2005-03/msg00676.html
>
> http://www.ac6rm.net/mailarchive/html/elecraft-list/2005-12/msg00408.html
>
> These two, at least, were due to the KSB2 ALC circuit
> having insufficient attenuation range to control the
> output of K2/100's which have above-average overall
> transmit gain on the lower bands.  The fix involves
> adding a resistor and changing another in the KSB2.
> Gary Surrency at Elecraft was able to provide me the
> necessary details.
>
> But Mike's problem sounds much less severe.  It might
> be a marginal case of this effect, I suppose.
>
> 73,
> Steve VE3SMA