CW reception with 3 peaks on PX3
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I was in contact with a CW station recently and his signal had 3 peaks on my PX3. Can anyone explain. The other station was using an ICOM 7410. Submitted this also on the KX3 Yahoo forum and had 1 reply. Thanks for that. Thought I might post it here in the hope to get an explanation. Have never seen this before and it does not happen on other CW stations. Gerard VK2JNG Gerard vk2jng at iCloud dot com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email]
Gerard VK2JNG
KX3 # 05782 |
Re: CW reception with 3 peaks on PX3
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Spurs, maybe? Meaning the TX station. Or maybe he was sending MCW
with a lot of distortion. 73, matt W6NIA On Thu, 06 Aug 2015 13:41:30 +1000, you wrote: > > > >I was in contact with a CW station recently and his signal had 3 peaks on my PX3. > >Can anyone explain. The other station was using an ICOM 7410. > >Submitted this also on the KX3 Yahoo forum and had 1 reply. Thanks for that. > >Thought I might post it here in the hope to get an explanation. Have never seen this before and it does not happen on other CW stations. > >Gerard VK2JNG > > > > > >Gerard >vk2jng at iCloud dot com > > > >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[hidden email] > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html >Message delivered to [hidden email] -- "Always store beer in a dark place." -R. Heinlein ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: CW reception with 3 peaks on PX3
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In reply to this post by JandG
Gerald,
If you only saw it on one CW signal, I would suggest there is something wrong with his transmission. 73, Don W3FPR On 8/5/2015 11:41 PM, Gerard Elijzen wrote: > > > I was in contact with a CW station recently and his signal had 3 peaks on my PX3. > > Can anyone explain. The other station was using an ICOM 7410. > > Submitted this also on the KX3 Yahoo forum and had 1 reply. Thanks for that. > > Thought I might post it here in the hope to get an explanation. Have never seen this before and it does not happen on other CW stations. > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: CW reception with 3 peaks on PX3
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My P3 does that when the NB is on and the level is too high.
Myron > > On 8/5/2015 11:41 PM, Gerard Elijzen wrote: > > > > > > I was in contact with a CW station recently and his signal had 3 peaks on my PX3. > > > > Can anyone explain. The other station was using an ICOM 7410. > > > > Submitted this also on the KX3 Yahoo forum and had 1 reply. Thanks for that. > > > > Thought I might post it here in the hope to get an explanation. Have never seen this before and it does not happen on other CW stations. > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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I've heard some South American stations using modulated CW (tone
modulated USB). This invariably produces sidebands. If other signals don't show it, then it is possible you caught one of those guys. 73 de Brian/K3KO On 8/6/2015 11:47 AM, Myron Cherry wrote: > My P3 does that when the NB is on and the level is too high. > > Myron > > > >> On 8/5/2015 11:41 PM, Gerard Elijzen wrote: >>> >>> I was in contact with a CW station recently and his signal had 3 peaks on my PX3. >>> >>> Can anyone explain. The other station was using an ICOM 7410. >>> >>> Submitted this also on the KX3 Yahoo forum and had 1 reply. Thanks for that. >>> >>> Thought I might post it here in the hope to get an explanation. Have never seen this before and it does not happen on other CW stations. >>> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [hidden email] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.6086 / Virus Database: 4401/10383 - Release Date: 08/06/15 > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Check both I/Q plugs to insure they are all the way in. I have seen this when the plugs are not completely plugged in. Push and rotate each plug for a good connection..
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In reply to this post by JandG
Probably sidebands from stray modulation. Distance from "carrier" to one is the freq of the modulating signal. I've very occasionally heard what sounds like intentional MCW, you have to widen your filters to hear it but you can see it on a P(X)3.
Fred K6DGW Sparks NV Gerard Elijzen <[hidden email]> wrote: > > > >I was in contact with a CW station recently and his signal had 3 peaks on my PX3. > >Can anyone explain. The other station was using an ICOM 7410. > >Submitted this also on the KX3 Yahoo forum and had 1 reply. Thanks for that. > >Thought I might post it here in the hope to get an explanation. Have never seen this before and it does not happen on other CW stations. > >Gerard VK2JNG > > > > > >Gerard >vk2jng at iCloud dot com > > > >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[hidden email] > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html >Message delivered to [hidden email] Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: CW reception with 3 peaks on PX3
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In reply to this post by JandG
Mis-adjusted carrier null? PS hum?
73 Ken - K0PP On Aug 5, 2015 9:42 PM, "Gerard Elijzen" <[hidden email]> wrote: > > > > I was in contact with a CW station recently and his signal had 3 peaks on > my PX3. > > Can anyone explain. The other station was using an ICOM 7410. > > Submitted this also on the KX3 Yahoo forum and had 1 reply. Thanks for > that. > > Thought I might post it here in the hope to get an explanation. Have never > seen this before and it does not happen on other CW stations. > > Gerard VK2JNG > > > > > > Gerard > vk2jng at iCloud dot com > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: CW reception with 3 peaks on PX3
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In reply to this post by JandG
What frequency? What spacing between the peaks?
On VHF this effect can often be seen due to aircraft scatter, ie doppler shifted returns as well as the direct one. So lots of possible explanations. Graham On 19:59, Gerard Elijzen wrote: > > > I was in contact with a CW station recently and his signal had 3 peaks on my PX3. > > Can anyone explain. The other station was using an ICOM 7410. > > Submitted this also on the KX3 Yahoo forum and had 1 reply. Thanks for that. > > Thought I might post it here in the hope to get an explanation. Have never seen this before and it does not happen on other CW stations. > > Gerard VK2JNG > > > > > > Gerard > vk2jng at iCloud dot com > > > > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: CW reception with 3 peaks on PX3
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I suspect this is/was a MCW generated signal with a bit too much drive
applied. Thus over drive of any audio stage such as may occur when feeding the computer output or sound card output to the microphone input. In this configuration it is very easy to overdrive the first stage, which appears before any gain adjustments. Once this stage is driven into distortion the least amount, no adjustments down stream in the audio chain will clean up the signal. Also excessive ALC, and in some radios any degree of ALC will cause the artifact, and any amount of audio processing will cause the basic same effect. 73 Bob, K4TAX On 8/7/2015 8:38 AM, Graham g3tct wrote: > What frequency? What spacing between the peaks? > On VHF this effect can often be seen due to aircraft scatter, ie > doppler shifted returns as well as the direct one. > So lots of possible explanations. > > Graham > > On 19:59, Gerard Elijzen wrote: >> >> >> I was in contact with a CW station recently and his signal had 3 >> peaks on my PX3. >> >> Can anyone explain. The other station was using an ICOM 7410. >> >> Submitted this also on the KX3 Yahoo forum and had 1 reply. Thanks >> for that. >> >> Thought I might post it here in the hope to get an explanation. Have >> never seen this before and it does not happen on other CW stations. >> >> Gerard VK2JNG >> >> >> >> >> >> Gerard >> vk2jng at iCloud dot com >> >> >> >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: CW reception with 3 peaks on PX3
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In reply to this post by Graham Kimbell
could be sending Audio tone CW from a sound card and overdriving?
Robin G1MHU ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: CW reception with 3 peaks on PX3
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Usually happens when the signal is strong and/or overdriven plus the noise
blanker is turned on. Gaylord N4SF -----Original Message----- From: Elecraft [mailto:[hidden email]] On Behalf Of Robin Moseley Sent: Friday, August 7, 2015 7:07 AM To: Graham g3tct; Gerard Elijzen Cc: [hidden email] Subject: Re: [Elecraft] CW reception with 3 peaks on PX3 could be sending Audio tone CW from a sound card and overdriving? Robin G1MHU ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Robin Moseley
A distinct possibility. For those that have a P3/PX3/SDR Panadapter and
can hear WWV on several of its frequencies, compare the spectra of the 2.5 and 20 MHz transmissions with those of the 5, 10, and 15 MHz ones. The 2.5 and 20 MHz transmitters are low level modulated followed by linear amplifier chains. The others are plate modulated Class C. The difference is striking. 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015 - www.cqp.org On 8/7/2015 7:06 AM, Robin Moseley wrote: > could be sending Audio tone CW from a sound card and overdriving? > Robin G1MHU ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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