[Elecraft] K2 and KX3 with A/B switch

[Wayne Burdick]

Ignacy,

I’ve never noticed the KX3’s AGC pumping, so I suspect something else. Small speaker aside, it should sound every bit as good as the analog K2, just with additional filtering features (thanks to the KX3’s DSP). 

Try turning AGC off. If there really were pumping, this would stop it. If it doesn’t stop, there’s something else going on. Do you have NB or NR turned on? Also try setting RX SHFT to 8.0 to see if you have noise getting into the KX3’s power supply lead. Baseband (RX SHFT=0) would be more affected by this in some cases.

73,
Wayne
N6KR



> On Nov 1, 2017, at 7:17 PM, Ignacy <no9e at arrl.net> wrote:
> 
> I am going to sell my K2 as it is gathering dust since KX3 came on board. But
> for probably the last time I put them on the A/B switch. Here is what I have
> found. 
> 
> 1. K2 has good speaker. KX3 has lousy speaker. Nothing strange as K2 is
> bigger. 
> 
> For comparisons I attached KX3 to an external amplified speaker.
> 
> 2. A weak CW signal in K2 is natural and easy copying. You can make it sound
> similar in KX3 by playing PBT and sometimes  engaging APF. 
> 
> 3. in SSB, K2 sounds nice and mellow although the bandwidth is limited. KX3
> sounds tiring because of AGC pumping. I fiddled with HOLD, ATTACH, etc.,
> with little effect.
> 
> K2 has to go because it is too big. But it is a fine radio.
> 
> Has anybody found AGC in KX3 harsh? Any way to do something about it other
> than running RF gain?
> 
> Ignacy, NO9E
> 
> 
> 
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> 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
> Message delivered to n6kr at elecraft.com