[Elecraft] [K3] Subtle Change in CW monitor tone

[Phil Hystad]

NR is off, AGC is Fast, and my 400 Hz 8-pole filter is engaged.  My K3 is
new, serial number 3799 so it has the latest firmware as of the December
28th ship date.   I have not updated firmware so far.  I did do some
experimentation with AGC but not enough to come to any conclusions.


73, phil, K7PEH

On Thu, Mar 11, 2010 at 11:01 AM, Gary Hvizdak <garyhvizdak at cfl.rr.com>wrote:

>  Phil,
>
>
>
>     It might be helpful if you were to mention your NR, AGC, and width
> settings as well as what roofing filter is engaged, and your firmware
> versions.
>
>
>
>     BTW, are you able to record what you are hearing and post it online?
>
>
>
> 73,
> Gary  KI4GGX
> K3 #2724
>
>
>  ------------------------------
>
>
>
> *Phil Hystad*  <elecraft%40mailman.qth.net?Subject=Re:%20%5BElecraft%5D%20%5BK3%5D%20Subtle%20Change%20in%20CW%20monitor%20tone&In-Reply-To=%3Cf5f18e621003111044pd50d4d8t39b85e7c101c22d1%40mail.gmail.com%3E>
> *Thu Mar 11 13:44:23 EST 2010*
>
>
>
> I am not sure how to describe this but I will do the best I can.  When
>
> listening to a single CW station I detect a slight tone frequency change
>
> from the sending station.  It almost sounds like some other very close by
>
> (within 100 Hz) station is also sending but such another station does not
>
> exist.  I thought at first it might be a slight variation due to the
>
> sender's frequency control but I have ruled that out as it occurs with a
>
> number of different stations.  I can hear this mostly (or, maybe only) when
>
> the signals are strong, S9 and beyond.
>
>
>
> Does anyone else detect this or is it just me.  It is not really a bother
>
> now that I am used to it but it seems to occur only when there is a slight
>
> pause in the sending, such as break between words.
>
>
>
> Comments?
>
>
>
> 73, phil, K7PEH
>
>
>