[Elecraft] [K3] need help with hiss on ssb receive

[Phil Hystad]

So, I assume you guys are talking about "hiss" that is even apparent on a quiet band (such as 10-meters when it is dead).  

If the hiss only occurs on a band with regular atmospheric noise how do you know to distinguish between the two or maybe even what components of one over the other.

73, phil, K7PEH



On Nov 24, 2012, at 9:49 AM, KD8NNU <goldtr8 at charter.net> wrote:

> I have hiss problems with all my radios.   In the mobile operations I use DSP amplified speakers to kill hiss.
> 
> For the K3 me I went to external amplified stereo speakers and cut the treble down.
> 
> I almost never use my head phones due to the hiss.   However, since the shack is in the basement I don’t need earphones very often.
> 
> I did use an external equalizer when I first got the K3 but I had RF issues with it so I had to take it out of line.    I might have to give it a try again as I fixed my RF problems so maybe it would work and I could use the earphones again.  However I am not sure it would be worth the effort.
> 
> Don
> 
> ~73
> Don
> KD8NNU
> -.- -.. ---.. -. -. ..-
> -----Original Message----- From: Mike Rodgers
> Sent: Friday, November 23, 2012 11:00 PM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] [K3] need help with hiss on ssb receive
> 
> I've been putting up with this hiss on receive for two years. Others have complained as well. It sounds like a rushing wind. Kinda like old cassette tape hiss. It's the dirty little secret no one wants to talk about and the first thing that comes up on other forums when you mention k3. The most common being "tiring to listen to.
> 
> I think I've got it the best it can be but I'm looking for tips to make it better.
> It keeps me from listening wide. Any hi cut above 2400 starts to irritate me so that limits me to a width of 2.1!
> 
> Others complain on LSB but to me it seems more noticeable on USB where I hang out.
> 
> It's a two year old k3 #5047 running latest firmware (not the beta).
> It's not Agc related as its the same with agc off.
> 
> I feel I have a very aggressive negative eq as follows.
> 
> 0.  0.  0.  -3.  -3.  -12.  -12/16.  -16
> 
> I love the rig except for this. I'm not planning to sell it but I would like to make it better if possible.
> Right now I'm stuck at a width of 2.1 because of this. Am I doomed to just get used to it? I can filter it out with a kenwood speaker with filters but that's really just doing the same as reducing hi cut or bandwidth.
> 
> Any ideas welcomed.
> 
> Thanks and 73
> Mike R
> 
> 
> 
> Play me some fiddle, but no stinkin' violin!
> 
> Amateur/Ham Radio KE5GBC
> HF & Echolink mobile
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