K3 in Very Heavy DQRM on 40M CW......

[W5RDW]

I thought I would try VP8SGI this evening on 40M, since I had not tried 40 due to the horrible DQRM almost every night on their TX frequency. They were pretty loud tonight here in NTx (10-15 dB above noise floor). I use a Delta Loop at 50 feet. A DQRM was "almost" zero beat on their frequency and 20 to 30 dB louder than them, making it near impossible to copy them. And to top it off, there were also a few signals very near their Tx frequency also. I cranked the K3 filter down as far as it would go (50Hz) and tuned the VFO A just ever so slightly to maximize the SGI copy and throw a few dB more rejection on the DQRM. After a few seconds, I could copy him clearly to make the contact.

This was the first time I have had to use that much filtering to make a contact!

[Wes (N7WS)]

All the selectivity in the world wouldn't help when the a**hole EU was keying
and swishing his VFO at about 0200Z tonight.

I finally worked them at 0401Z but wasn't sure because of QRM on their freq.  So
I kept calling and worked them again for sure at 0414Z.  Inverted V, apex at
45', K3S/KPA500.  Slot number 14.



On 2/4/2016 6:04 PM, W5RDW wrote:

> I thought I would try VP8SGI this evening on 40M, since I had not tried 40
> due to the horrible DQRM almost every night on their TX frequency. They were
> pretty loud tonight here in NTx (10-15 dB above noise floor). I use a Delta
> Loop at 50 feet. A DQRM was "almost" zero beat on their frequency and 20 to
> 30 dB louder than them, making it near impossible to copy them. And to top
> it off, there were also a few signals very near their Tx frequency also. I
> cranked the K3 filter down as far as it would go (50Hz) and tuned the VFO A
> just ever so slightly to maximize the SGI copy and throw a few dB more
> rejection on the DQRM. After a few seconds, I could copy him clearly to make
> the contact.
>
> This was the first time I have had to use that much filtering to make a
> contact!
>

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[Gary K9GS]

I heard both of your QSOs Wes.  I worked them right after you at 0416Z

Congratulations!

They had a great signal on 40 and also 30M a few hours earlier.



On 2/4/2016 10:55 PM, Wes (N7WS) wrote:

> All the selectivity in the world wouldn't help when the a**hole EU was
> keying and swishing his VFO at about 0200Z tonight.
>
> I finally worked them at 0401Z but wasn't sure because of QRM on their
> freq.  So I kept calling and worked them again for sure at 0414Z.  
> Inverted V, apex at 45', K3S/KPA500.  Slot number 14.
>
>
>
> On 2/4/2016 6:04 PM, W5RDW wrote:
>> I thought I would try VP8SGI this evening on 40M, since I had not
>> tried 40
>> due to the horrible DQRM almost every night on their TX frequency.
>> They were
>> pretty loud tonight here in NTx (10-15 dB above noise floor). I use a
>> Delta
>> Loop at 50 feet. A DQRM was "almost" zero beat on their frequency and
>> 20 to
>> 30 dB louder than them, making it near impossible to copy them. And
>> to top
>> it off, there were also a few signals very near their Tx frequency
>> also. I
>> cranked the K3 filter down as far as it would go (50Hz) and tuned the
>> VFO A
>> just ever so slightly to maximize the SGI copy and throw a few dB more
>> rejection on the DQRM. After a few seconds, I could copy him clearly
>> to make
>> the contact.
>>
>> This was the first time I have had to use that much filtering to make a
>> contact!
>>
>
> ______________________________________________________________
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>
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> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>
>
> --
> 73,
>
> Gary K9GS
>
> Greater Milwaukee DX Association: http://www.gmdxa.org
> Society of Midwest Contesters: http://www.w9smc.com
> CW Ops #1032   http://www.cwops.org
>
> ************************************************

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