[K3] need help with hiss on ssb receive

[K2GN]

Is it possible you have the SUB-Rx set to use a RXant and you don't have an
RXant?
Happened to me when I move my RXant to another rig.
You have to set the SUB-RX to the Main Ant, not the RX Ant.
Larry/K2GN - http://k2gn.com


-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Buck k4ia
Sent: Monday, November 26, 2012 9:04 AM
To: [hidden email]
Subject: Re: [Elecraft] [K3] need help with hiss on ssb receive

Reduce your RF gain,  Use the attenuator on the lower bands.

The reason it is the same with the AGC on or off is because with AGC off the
receiver is running full bore amplifying all the background noise.
You must reduce your RF gain until the background noise (hiss) goes away so
the signal you want to hear will be just above the silence.  Then, set the
AGC controls to the defaults or follow some of the other suggestions on this
list.

Buck
k4ia
K3 # 101  KX3 #715

On 11/23/2012 11:00 PM, Mike Rodgers wrote:
> 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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[Bill Clarke]

The article regarding AGC at w3prf.com was most interesting and
informative. I am now experimenting with the AGC settings much more than
I had.  So far this morning, I am enjoying the K3 far more than I have
in the past. This may just be the magic bullet for the hiss problem that
has bothered me so much.

Thanks,

Bill W2BLC

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[Don Wilhelm-4]

That website is www.w3fpr.com.

The article was created before the AGC parameters were expanded, but the
principles are the same.

As it has been said here, turn off the preamp if it is not needed, and
even add the attenuator.
If you hear an increase in noise level when you connect an antenna,
there is enough gain.  The K3 has more than enough gain on all but the
most quiet bands without the preamp, so turning it off when not needed
goes a long way toward reducing the hiss of ambient band noise.

73,
Don W3FPR

On 11/26/2012 9:22 AM, Bill Clarke wrote:

> The article regarding AGC at w3prf.com was most interesting and
> informative. I am now experimenting with the AGC settings much more
> than I had.  So far this morning, I am enjoying the K3 far more than I
> have in the past. This may just be the magic bullet for the hiss
> problem that has bothered me so much.
>
> Thanks,
>
> Bill W2BLC
>
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> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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>
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> Please help support this email list: http://www.qsl.net/donate.html
>

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