K2 SSB adjustment

[Mike Geddes]

The audio quality on my K2 was pretty bad on SSB, transmit and receive. I
followed the SSB manual advice and adjusted BFO1 using Cal Fil on upper and
lower sideband (on 80 meters) until I got it sounding pretty good. Not
perfect. But pretty decent. I then tried to transmit on 10 meters upper, and
the SSB quality was terrible.  Like it, too, needed adjustment. I was under
the impression that doing this once on any HF band would work for all. Is
this not true? Any suggestions for getting the SSB sounding good on this
fine rig? (FYI, I was transmitting for testing of audio quality and feedback
on my initial adjustments, and had nearby ham helping me listen and offer
suggestions. My rig is wired for Kenwood mikes, and I was using the MC-43
and a Heil Pr-20 for testing.) Any thoughts and suggestions are appreciated.
I want to get the SSB transmit and receive sounding as good as possible.

73,
Mike
N4JX

K1/4  #2319
K2/100  #6042



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[Julian, G4ILO]

On Nov 30, 2007 3:33 AM, Mike Geddes <[hidden email]> wrote:

> The audio quality on my K2 was pretty bad on SSB, transmit and receive. I
> followed the SSB manual advice and adjusted BFO1 using Cal Fil on upper and
> lower sideband (on 80 meters) until I got it sounding pretty good. Not
> perfect. But pretty decent. I then tried to transmit on 10 meters upper, and
> the SSB quality was terrible.  Like it, too, needed adjustment. I was under
> the impression that doing this once on any HF band would work for all. Is
> this not true? Any suggestions for getting the SSB sounding good on this
> fine rig? (FYI, I was transmitting for testing of audio quality and feedback
> on my initial adjustments, and had nearby ham helping me listen and offer
> suggestions. My rig is wired for Kenwood mikes, and I was using the MC-43
> and a Heil Pr-20 for testing.) Any thoughts and suggestions are appreciated.
> I want to get the SSB transmit and receive sounding as good as possible.
>
> 73,
> Mike
> N4JX

LSB and USB both need to be adjusted separately. But the sidebands at
IF are reversed above, I think, 17m, so USB on 15m and up will use the
same settings as LSB on the lower bands, and vice versa. So 10m USB
should sound the same as 80m LSB.
--
Julian, G4ILO K2 s/n: 392  K3 s/n: ???
G4ILO's Shack: www.g4ilo.com
Zerobeat Ham Forums: www.zerobeat.net/smf
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[oe9fwv]

hi Mike,

On 29 Nov 2007 at 22:33, Mike Geddes wrote:

> The audio quality on my K2 was pretty bad on SSB, transmit and
> receive. I followed the SSB manual advice and adjusted BFO1 using Cal
> Fil on upper and lower sideband (on 80 meters) until I got it sounding
> pretty good. Not perfect. But pretty decent. I then tried to transmit
> on 10 meters upper, and the SSB quality was terrible.  Like it, too,
> needed adjustment. I was under the impression that doing this once on
> any HF band would work for all. Is this not true? Any suggestions for
> getting the SSB sounding good on this fine rig? (FYI, I was
> transmitting for testing of audio quality and feedback on my initial
> adjustments, and had nearby ham helping me listen and offer
> suggestions. My rig is wired for Kenwood mikes, and I was using the
> MC-43 and a Heil Pr-20 for testing.) Any thoughts and suggestions are
> appreciated. I want to get the SSB transmit and receive sounding as
> good as possible.

maybe this thread helps you:
http://www.mail-archive.com/elecraft@.../msg44313.html

With my K2 and KPA100 I had good success with ground the microphone
shell. I have also made the mentioned Gain modification.

73! de Werner
OE9FWV

--  
 ... Technology:  Once you can afford it, it's out of date.



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[Don Wilhelm-4]

Mike,

As has been stated earlier on the reflector, 80 or 40 meter LSB should
sound the same as 10 meter USB - there is a sideband swap due to the VCO
injection frequency at 15 meters and above.  You could be having some RF
feedback problems on 10 meters, or it could just be a matter of more
precise filter alignment is needed.

While setting the SSB filters like the KSB2 manual indicates is a good
starting point, you can do much better by using Spectrogram.  Align the
lower frequency corner of the passband at 300 Hz for best results - if
you have the stock 2.4 kHz filter width, set Spectrogram markers at 300
and 2600 and center the passband between those points.

If you are not familiar with Spectrogram for aligning the K2 filters,
take a look at the information on the Elecraft website builder's
resource page, or Tom Hammond's website www.n0ss.net or at my website
www.qsl.net/w3fpr - look at Part 3 of the article on K2 Dial Calibration.

73,
Don W3FPR

Mike Geddes wrote:

> The audio quality on my K2 was pretty bad on SSB, transmit and
> receive. I followed the SSB manual advice and adjusted BFO1 using Cal
> Fil on upper and lower sideband (on 80 meters) until I got it sounding
> pretty good. Not perfect. But pretty decent. I then tried to transmit
> on 10 meters upper, and the SSB quality was terrible.  Like it, too,
> needed adjustment. I was under the impression that doing this once on
> any HF band would work for all. Is this not true? Any suggestions for
> getting the SSB sounding good on this fine rig? (FYI, I was
> transmitting for testing of audio quality and feedback on my initial
> adjustments, and had nearby ham helping me listen and offer
> suggestions. My rig is wired for Kenwood mikes, and I was using the
> MC-43 and a Heil Pr-20 for testing.) Any thoughts and suggestions are
> appreciated. I want to get the SSB transmit and receive sounding as
> good as possible.
>

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