Hi,
This was a common complaint in the past. Elecraft engineered a retrofit
low pass filter for the RX DSP board which cuts off above 4kHz. Or you
can swap out for a replacement DSP board to revision D status where the
LPF is fully integrated. You might like to investigate what the status
of you K3 is.
Details can be accessed via the Elecraft ordering page.
Regards,
Mike VP8NO
On 24/11/2012 06:02, Barry Simpson wrote:
I have never heard any hiss whatsoever with my K3 (s/n 1397) either on speaker
or headphones, CW or SSB and I am particularly sensitive to such things. My
TS590 does have some very low level hiss which I can live with Ok and I had a
TS480 which had quite pronounced hiss. The worst I have heard in recent years
is the FT2000 which is one of the reasons I have never owned one.
73
Barry. VK2BJ
Sent from my iPad
On 24/11/2012, at 11:15, Scott Manthe <scott.man...@gmail.com> wrote:
I've heard of this problem, but have never actually heard the problem on my K3,
which has a serial number in the 3000 range. I'm sure you'll get numerous
replies offering suggestions.
I'm curious, when you say you "hang out" on USB, does this mean you never
operate below 10 mHz? Or do you operate on USB even on 40, 80 and 160 meters? Personally,
I don't notice much difference in the frequency response on USB and LSB, but that might
be because I only operate USB on the bands above 10 mHz.
73,
Scott, N9AA
On 11/23/12 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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