XV144 transmits 5kHz low
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Howdy K3' people:
Made a few contacts on 2m now, SSB & CW. But everyone is telling me I am exactly 5kc low ! In CONFIG:xvtr2 I see offset is 0. I have tried cw-rev too. Where else do I look for a TX offset .. as I am always on the correct receiving freq. thanks -- 73 KD7YZ Bob ______________________________________________________________ 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 |
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Bob,
I don't see how that shift could be coming from the XV144. Its local oscillator is running on the same frequency during receive and transmit. I would check the K3 28 MHz output to see if the same thing occurs. A guess -- It could be a mode thing. If the others are operating with CW in SSB, your K3 should be set similarly. The default for the K3 is for CW to be LSB - if others are operating with CW in USB, that could account for a difference if you are changing modes on the K3. The offset setting on the K3 is to account for any difference between the actual frequency and the K3 transverter band reading, and is applied to both transmit and receive. 73, Don W3FPR On 2/23/2013 10:08 AM, [hidden email] wrote: > Howdy K3' people: > Made a few contacts on 2m now, SSB & CW. But everyone is telling me I > am exactly 5kc low ! > > In CONFIG:xvtr2 I see offset is 0. > > I have tried cw-rev too. > > Where else do I look for a TX offset .. as I am always on the correct > receiving freq. > > thanks > > > > > ______________________________________________________________ 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 |
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In reply to this post by Bob KD7YZ
Assuming the jumper on your XV144 is set for TRN2, that is where you
should change the OFS to give you the correct transmit frequency. For what it's worth, my K2 OFS is set to -1.32 but yours will most certainly be different depending on the precise frequency of the XV144 crystal. 73 de David G4DMP In a recent message, [hidden email] writes >Howdy K3' people: >Made a few contacts on 2m now, SSB & CW. But everyone is telling me I >am exactly 5kc low ! > >In CONFIG:xvtr2 I see offset is 0. > >I have tried cw-rev too. > >Where else do I look for a TX offset .. as I am always on the correct >receiving freq. + - - - - - - - - - - - - - - - - + | David M Pratt, Kippax, Leeds. | | Website: http://www.g4dmp.co.uk | + - - - - - - - - - - - - - - - - + ______________________________________________________________ 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 |
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In reply to this post by Don Wilhelm-4
Bob
For some reason I have not received your original mail, so excuse my piggy back on Don's reply. Firstly, 5kHz is a long way off ! If people called me 5kHz away, I probably would not hear them at all. Secondly, as Don says, the way the transverter works, with just the same one oscillator running for tx or rx, it is pretty much guaranteed not to shift between receive and transmit. So my guess is that you may have accidentally engaged the RIT or more likely the XIT, or perhaps the split frequency option. Everything you would do on 28MHz, your baseband for transverting, is faithfully reproduced on 144MHz. Regards John G4ZTR _____ From: [hidden email] [mailto:[hidden email]] On Behalf Of Don Wilhelm Sent: 23 February 2013 18:38 To: [hidden email] Cc: K3 List Subject: Re: [Elecraft] XV144 transmits 5kHz low Bob, I don't see how that shift could be coming from the XV144. Its local oscillator is running on the same frequency during receive and transmit. I would check the K3 28 MHz output to see if the same thing occurs. A guess -- It could be a mode thing. If the others are operating with CW in SSB, your K3 should be set similarly. The default for the K3 is for CW to be LSB - if others are operating with CW in USB, that could account for a difference if you are changing modes on the K3. The offset setting on the K3 is to account for any difference between the actual frequency and the K3 transverter band reading, and is applied to both transmit and receive. 73, Don W3FPR On 2/23/2013 10:08 AM, [hidden email] wrote: > Howdy K3' people: > Made a few contacts on 2m now, SSB & CW. But everyone is telling me I > am exactly 5kc low ! > > In CONFIG:xvtr2 I see offset is 0. > > I have tried cw-rev too. > > Where else do I look for a TX offset .. as I am always on the correct > receiving freq. > > thanks > > > > > ______________________________________________________________ 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 __________ Information from ESET NOD32 Antivirus, version of virus signature database 8043 (20130223) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signature database 8043 (20130223) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signature database 8043 (20130223) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.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 |
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On Saturday Lemay used a Straight-Key to send: -------------Original Comment------- > Firstly, 5kHz is a long way off ! If people called me 5kHz away, I > probably would not hear them at all. > tell me about it! hi hi ... I'd call and call. finally the other day somebody comes back and tells me i am 5kc low.. later on several others said the same thing. > > Everything you would do on 28MHz, your > baseband for transverting, is faithfully reproduced on 144MHz. RIt XIT Split is not on on either 144 or 28 and as of a half-hour ago, I am still transmitting 5kHz lower than I Rx. -- Best regards, Bob KD7YZ Win7-64bit + K3 ______________________________________________________________ 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 |
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You need Elecraft Tech Support !
-----Original Message----- From: [hidden email] [mailto:[hidden email]] Sent: 26 February 2013 03:36 To: John Lemay Cc: 'K3 List' Subject: Re: [Elecraft] XV144 transmits 5kHz low On Saturday Lemay used a Straight-Key to send: -------------Original Comment------- > Firstly, 5kHz is a long way off ! If people called me 5kHz away, I > probably would not hear them at all. > tell me about it! hi hi ... I'd call and call. finally the other day somebody comes back and tells me i am 5kc low.. later on several others said the same thing. > > Everything you would do on 28MHz, your > baseband for transverting, is faithfully reproduced on 144MHz. RIt XIT Split is not on on either 144 or 28 and as of a half-hour ago, I am still transmitting 5kHz lower than I Rx. -- Best regards, Bob KD7YZ Win7-64bit + K3 __________ Information from ESET NOD32 Antivirus, version of virus signature database 8050 (20130225) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signature database 8051 (20130226) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.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 |
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