[Elecraft] K3 Rev C +AF filter

[srife at swbell.net]

Sorry, my posts have been going to individuals instead of the reflector.




	I have tinnitus in both ears and less high frequency noise is a good
thing for me. I can see where the younger guys, and some older ones that
still have good hearing, are not bothered by the K3 audio. The Heil headset
does seem to make an improvement...or maybe it's just that all of the other
noises (room etc.) go away and it makes listening to the K3 much better
because you can turn down the AF gain some. 

	I'll have to admit that I have not attempted adjustment to the
equalizers or messed with the AGC adjustments that some have mentioned. I am
in the process of getting SN/0690 up-to-date with the mods that are listed
on Elecrafts site, and also have ordered the upgraded DSP board. Once the
hardware & FW are up to date I'll start digging in the new manual and see if
I can make my listening experience better.

	This is a good thread and I'm listening.


Stan Rife 
W5EWA 



-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of David Olean
Sent: Thursday, December 17, 2009 5:01 PM
To: Vic K2VCO; k4pi
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 Rev C +AF filter

I have two K3s, one has  the new DSP board, so I hooked them up together and

listened to low frequency tones. The higher SN radio definitely has more 
bass. In fact I have noted a few times, just how low it goes. It seemed very

unusual for a communications radio to do that. So I listened to the older 
one and it has less bass, but to be honest, I don't see a problem with it. 
It sounds just fine to me. Now if it was my stereo FM receiver I would heave

it out, but I chase DX with it and see no big reason to update it. I guess 
it is a personal decision for folks. I am using a Heil headset to make the 
comparison. I am almost 65 years old and my hearing is hosed on the high 
end. I am not sure if it is from the several decades of weak signal work, or

having way too much fun in the 60's, but my upper limit is now a bit over 6 
or 8 kHz. I tune in CW at about 450-500 Hz.

Dave K1WHS

----- Original Message ----- 
From: "Vic K2VCO" <vic at rakefet.com>
To: "k4pi" <k4pi at bellsouth.net>
Cc: <elecraft at mailman.qth.net>
Sent: Thursday, December 17, 2009 9:43 PM
Subject: Re: [Elecraft] K3 Rev C +AF filter


> k4pi wrote:
>> I am anxious to see what the new board will do.  I have used QF1A for 
>> many
>> years and never found a radio yet where it did not enable me to copy 
>> signals
>> much better.  I treat my QF1As like gold and never operate without one in
>> the Peak mode.
>
> All the board changes do is improve low end response, which in my opinion 
> is already more
> than good enough for CW and SSB work.
>
> The 'filter' mentioned is not a peak or null filter, but just a lowpass 
> filter to remove
> some very high-pitched DSP artifacts that bother some operators.
>
> In my opinion, this replacement board is not something that everyone 
> needs. I will
> probably order the filter sub-board by itself when it becomes available 
> even though I'm
> probably too old to hear the DSP artifacts in question, but don't intend 
> to bother with
> replacing the DSP board.
> -- 
> 73,
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html 

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html