Posted by
Phil LaMarche-2 on
Mar 16, 2009; 4:19pm
URL: http://elecraft.85.s1.nabble.com/Hot-K3-tp2483931p2487038.html
This thread was very helpful to me and I learned a lot about the RF gain
control. Thank you!
Phil
Philip LaMarche
LaMarche Enterprises, Inc.
www.instantgourmetspices.com
www.w9dvm.com
800-395-7795 pin 02
727-944-3226
FAX 727-937-8834
NASFT 30210
K3 #1605
W9DVM
-----Original Message-----
From:
[hidden email]
[mailto:
[hidden email]] On Behalf Of
[hidden email]
Sent: Monday, March 16, 2009 12:16 PM
To:
[hidden email]
Subject: Re: [Elecraft] "Hot" K3
Yes, it is a "hot" receiver. I usually have the RF gain turned to about
50%
- just a little above the band noise. You can be more aggressive on PSK
and
weak signal CW as it is possible to copy signals below (but not much below)
the band noise.
Also, the K3 was designed to have excellent dynamic range and if you ride
the RF gain too high, you are wasting some of that headroom.
Buck
k4ia
K3 #101
In a message dated 3/16/2009 11:57:22 A.M. Eastern Daylight Time,
[hidden email] writes:
Don:
I had the same reaction upon first using my new K3 last year. The K3 is
significantly more sensitive than my previous rig (IC-756 non-Pro), and as
my noise environment is fairly high (inner suburb with ~110 dBm background
noise), at first it seemed as if the K3 is fairly noisy. Also, while the S
meter of most rigs are calibrated fairly well at S9, their meters are not
linear (in dB units) at lower S unit readings (the K3 meter is very linear
at 6 dB per S unit)-- with the result that the K3 meter readings are higher
by a few S units.
I find that I often use the attenuator and/or the RF gain to decrease the
band noise in the K3 -- I rarely used these in my other rigs. Also, try
playing with the AGC settings, particularly the THR and SLP settings, which
can be customized to suit your operating conditions. Also, turning off the
AGC and riding the RF gain can really help pull out very weak signals.
Steve N9SZ
Don Rasmussen wrote:
"My new K3 #2308 shows two to three S-units high as compared to my other HF
radios, \ and lots of hiss in the speaker audio at low AF levels."
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