(K2) distortion on CW receive

[RobertG]

#5957 has been on the shelf for a while [2yrs]. When fired up in prep
for Field Day, the received CW tone is significantly distorted in head
phones on all bands. The side tone frequency set is very clean as is the
adjustment for side tone volume. I have no test equipment at this time,
so it's pretty much menu items and adjustments or send it to Don.
Suggestions welcome. Thanks.

...robert
--
Robert G Strickland, PhD ABPH - KE2WY
[hidden email]
Syracuse, New York, USA
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[Don Wilhelm]

Robert,

Do you have the KDSP2 installed?  If so, check the nr and nt settings in
the DSP menu.
If you see a dot before either or both, turn them off and see if the
distortion goes away.  Those functions, if used with aggressive settings
will cause distortion.

The sidetone is fed separately and does not go through the DSP processor.

If that is not the problem, then you likely have mis-aligned IF
filters.  I recall I have worked on your K2 before, and you should have
a chart of the filter settings.  I can tell you how to restore the
proper settings via off-list email.

73,
Don W3FPR

On 6/15/2016 6:11 PM, Robert G Strickland wrote:
> #5957 has been on the shelf for a while [2yrs]. When fired up in prep
> for Field Day, the received CW tone is significantly distorted in head
> phones on all bands. The side tone frequency set is very clean as is
> the adjustment for side tone volume. I have no test equipment at this
> time, so it's pretty much menu items and adjustments or send it to
> Don. Suggestions welcome. Thanks.
>
> ...robert

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[RobertG]

Don...

Thanks. With the DSP function OFF, the audio is fine. I forgot that one.

Yes, you did a repair and complete alignment several years ago.
Excellent work, and I haven't touched anything since then. I don't
remember the chart of filter settings, though that is a while back, and
who knows...

Thanks again. Hope and trust that you and yours are well.

...robert

On 06/15/2016 22:56, Don Wilhelm wrote:

> Robert,
>
> Do you have the KDSP2 installed?  If so, check the nr and nt settings in
> the DSP menu.
> If you see a dot before either or both, turn them off and see if the
> distortion goes away.  Those functions, if used with aggressive settings
> will cause distortion.
>
> The sidetone is fed separately and does not go through the DSP processor.
>
> If that is not the problem, then you likely have mis-aligned IF
> filters.  I recall I have worked on your K2 before, and you should have
> a chart of the filter settings.  I can tell you how to restore the
> proper settings via off-list email.
>
> 73,
> Don W3FPR
>
> On 6/15/2016 6:11 PM, Robert G Strickland wrote:
>> #5957 has been on the shelf for a while [2yrs]. When fired up in prep
>> for Field Day, the received CW tone is significantly distorted in head
>> phones on all bands. The side tone frequency set is very clean as is
>> the adjustment for side tone volume. I have no test equipment at this
>> time, so it's pretty much menu items and adjustments or send it to
>> Don. Suggestions welcome. Thanks.
>>
>> ...robert
>
>

--
Robert G Strickland, PhD ABPH - KE2WY
[hidden email]
Syracuse, New York, USA
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