[Elecraft] My K3's hissy and noisy audio

[Enno, PF5X]

Hi Maarten,

I tend to agree with your observations. If you live in a noisy environment like I do, the K3 RX can be quite "restless" and listening fatigue comes in easy. I played with the AGC setting a while ago and came up with the following settings in the CONFIG menu: AGC SLP 008, AGC THR 006. This gives the RX a more analogue behaviour and it increases the distance between the background noise level and desired signal. I am still using F/W 2.76, so the new options in F/W 3.0x might be able to further improve the situation.

-- Enno, PF5X
K3 #1263



Hello everybody,

During last CQ WPX contest I got the chance to put my K3 to work at our
contest station PI4DX. We participated in the Multi One klass which allows
us to use 2 radio's, one running station and one multiplier station.
We used my K3 on the running station and a Icom IC-7700 on the multiplier
station. This was actually the first time I could compare the K3 to a high
end transceiver such as the IC-7700. I was surprised to find out that the
7700 sounded much better. The receiver was less noisy an easier to listen
to. Several other operators also stated the K3's audio was hissy and sharp
and not nice and smooth.
We could hear it using the built-in speaker as well as on a Heil Pro Set
Plus.
The RX EQ is flat and I used the 2.7 filter on a 2.7 KHz bandwidth.
Narrowing the bandwidth makes it worse but that is to be expected. No NB or
NR was used. AFX on or off makes no difference. In addition to the 2.7 KHz
filter my K3 also has the 2.1, 1.8 KHz and the 400 Hz filters. It doesn't
have the 2nd receiver, the KXV3, KBPF3, or the KTCXO3. It does have the
KDVR3, KAT3 and the KPA3. (will order a KXV3 module shortly)

After reading all these glowing reports on the K3's smooth receiver I can
only draw one conclusion; there must be something wrong with my K3.

What could it be?

73, Maarten van Rossum
PD2R
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