K144XV Frequency Error
Locked
 
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Hi Folks,
I need help. I have an early K3 equipped with the K3EXREF Frequency Lock Option, K144XV Two Meter Module and K144XV Reference Oscillator Phase Lock Option. Some time after installing the KSYN3A synthesizers I noticed that the 144 Mhz band has a 5.6 KHz frequency error. Signals occurring on the 144.200 calling frequency appear at 144.1944. Other bands do not display this frequency error. These observations have been verified by a very precise RF signal generator. I verified that the 10 Mhz GPS reference is present and meets the Elecraft amplitude requirements. The tech mode menu "ref cal" asterisk is present and blinking, indicating that the radio is phase locked to the 10 Mhz reference. I went back through the installation manuals for the options mentioned and did not find any error. I'm concluding that I may have made an assembly error when installing the KSYN3a. Can some member of the Elecraft "brain trust" help me find and resolve this problem please? Thanks, Bill W7QQ ______________________________________________________________ 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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Bill,
A wild guess - did you have an offset turned on in the menu before you installed the K3EXREF? I assume you have both the K3EXREF option along with the K144RFLK options for best stability of the K144XV. Check the XVn OFS menu parameter. 73, Don W3FPR On 9/18/2015 6:51 PM, Bill Schwantes wrote: > Hi Folks, > > I need help. I have an early K3 equipped with the K3EXREF Frequency Lock > Option, K144XV Two Meter Module and K144XV Reference Oscillator Phase Lock > Option. > > Some time after installing the KSYN3A synthesizers I noticed that the 144 > Mhz band has a 5.6 KHz frequency error. Signals occurring on the 144.200 > calling frequency appear at 144.1944. > > ______________________________________________________________ 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 Bill Schwantes
Hi Bill,
Under main menu look for XV OFS. Believe has a +/- 10kc shift range which will move you on frequency. If you had it right before it may have got shifted or even turned off accidentally. 73, Bob K2TK On 9/18/2015 6:51 PM, Bill Schwantes wrote: > Hi Folks, > > I need help. I have an early K3 equipped with the K3EXREF Frequency Lock > Option, K144XV Two Meter Module and K144XV Reference Oscillator Phase Lock > Option. > > Some time after installing the KSYN3A synthesizers I noticed that the 144 > Mhz band has a 5.6 KHz frequency error. Signals occurring on the 144.200 > calling frequency appear at 144.1944. > > Other bands do not display this frequency error. > > These observations have been verified by a very precise RF signal > generator. > > I verified that the 10 Mhz GPS reference is present and meets the Elecraft > amplitude requirements. The tech mode menu "ref cal" asterisk is present > and blinking, indicating that the radio is phase locked to the 10 Mhz > reference. > > I went back through the installation manuals for the options mentioned and > did not find any error. I'm concluding that I may have made an assembly > error when installing the KSYN3a. > > Can some member of the Elecraft "brain trust" help me find and resolve this > problem please? > > Thanks, Bill > W7QQ > ______________________________________________________________ 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 Bill Schwantes
I just installed a 2nd receiver and the 2M ref lock. The KRX3A
installation manual, which uses the new synths shows J4 of the new style main synth connected to REF IN on the 2M transverter. The ref lock installation manual shows J83 of the old style synth connected to REF IN and REF OUT connected to J2 on the KREF3 board. Absent advice from someone at Elecraft who knows, I would use J4 with the new synths and the J83 with a jumper to the KREF3 board with the old synths. 73 Bill AE6JV On 9/18/15 at 3:51 PM, [hidden email] (Bill Schwantes) wrote: >Hi Folks, > >I need help. I have an early K3 equipped with the K3EXREF Frequency Lock >Option, K144XV Two Meter Module and K144XV Reference Oscillator Phase Lock >Option. > >Some time after installing the KSYN3A synthesizers I noticed that the 144 >Mhz band has a 5.6 KHz frequency error. Signals occurring on the 144.200 >calling frequency appear at 144.1944. > >Other bands do not display this frequency error. > >These observations have been verified by a very precise RF signal >generator. > >I verified that the 10 Mhz GPS reference is present and meets the Elecraft >amplitude requirements. The tech mode menu "ref cal" asterisk is present >and blinking, indicating that the radio is phase locked to the 10 Mhz >reference. > >I went back through the installation manuals for the options mentioned and >did not find any error. I'm concluding that I may have made an assembly >error when installing the KSYN3a. > >Can some member of the Elecraft "brain trust" help me find and resolve this >problem please? > >Thanks, Bill >W7QQ Bill Frantz | Privacy is dead, get over | Periwinkle (408)356-8506 | it. | 16345 Englewood Ave www.pwpconsult.com | - Scott McNealy | Los Gatos, CA 95032 ______________________________________________________________ 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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On Fri,9/18/2015 5:28 PM, Bill Frantz wrote:
> I just installed a 2nd receiver and the 2M ref lock. The KRX3A > installation manual, which uses the new synths shows J4 of the new > style main synth connected to REF IN on the 2M transverter. I installed five synth boards. It's been a while, but I think I remember the instructions for the new boards having really good pix documenting what plugs to what, but I don't have an internal 2M transverter. 73, Jim ______________________________________________________________ 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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