freq drift/front end KX3
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1) i was trying to set up a dipole antenna to get my first QSO. i was on
40 m and as i was tinkering with my head ]phones i noticed that i had a 0.1 drift on the LCD readout VFOA. the readout had dropped by that much.. in fact it did more then once. i would tune to a freq, and then listen (not touching anything) and without any other change it would drift by itself??? 2) another item. i removed all wires etc from the radio, and found that there was a lot of noise. even my buddy, who has been a ham for many years wondered what was happening. and what is happening. thought i would ask the gurus here if they know what is going on? ______________________________________________________________ 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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Is yours a factory build or kit? Mine's a kit and I while building it, the
full-turn spacing for the inside nut for the VFO encoder was a bit far for mine to make contact. I noticed that while adjusting the VFO, that it would sometime wander even though I hadn't touched it. In my case, I think there was just a bit of play in the VFO and once I had it properly seated and making clean contact the drifting disappeared. Also does it do it after the radio has been on for a while, or only after freshly powered up? Even with a bit of play in my VFO, the wandering would disappear after a few minutes of being powered on. (note my KX3 no longer exhibits this behavior at all once I got my VFO issues sorted out). ./ben W6MCM On Wed, May 23, 2012 at 6:58 PM, Robert Galambos <[hidden email]> wrote: > 1) i was trying to set up a dipole antenna to get my first QSO. i was on > 40 m and as i was tinkering with my head ]phones > i noticed that i had a 0.1 drift on the LCD readout VFOA. the readout > had dropped by that much.. in fact it did more then once. i would tune > to a freq, and then listen (not touching anything) and without any other > change it would drift by itself??? > > 2) another item. i removed all wires etc from the radio, and found that > there was a lot of noise. even my buddy, who has been a ham for many > years wondered what was happening. and what is happening. > > thought i would ask the gurus here if they know what is going on? > > > > > > ______________________________________________________________ > 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 > 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 12-05-23 10:25 PM, ~BG~ wrote:
> Is yours a factory build or kit? #33 factory built > Mine's a kit and I while building it, the > full-turn spacing for the inside nut for the VFO encoder was a bit far for > mine to make contact. I noticed that while adjusting the VFO, that it > would sometime wander even though I hadn't touched it. In my case, I think > there was just a bit of play in the VFO and once I had it properly seated > and making clean contact the drifting disappeared. funny you should mention that. i had to reseat the vfoa as the nut holding the vfo in place on the front panel was completely lose. i had hand tighten it and afterwards everything was ok. > > Also does it do it after the radio has been on for a while, or only after > freshly powered up? Even with a bit of play in my VFO, the wandering would > disappear after a few minutes of being powered on. (note my KX3 no longer > exhibits this behavior at all once I got my VFO issues sorted out). i would say just the opposite. i noticed it after it had been turned for awhile thanks for the advice though. i thought i was going crazy 73 > > > ./ben > W6MCM > > On Wed, May 23, 2012 at 6:58 PM, Robert Galambos<[hidden email]> wrote: > >> 1) i was trying to set up a dipole antenna to get my first QSO. i was on >> 40 m and as i was tinkering with my head ]phones >> i noticed that i had a 0.1 drift on the LCD readout VFOA. the readout >> had dropped by that much.. in fact it did more then once. i would tune >> to a freq, and then listen (not touching anything) and without any other >> change it would drift by itself??? >> >> 2) another item. i removed all wires etc from the radio, and found that >> there was a lot of noise. even my buddy, who has been a ham for many >> years wondered what was happening. and what is happening. >> >> thought i would ask the gurus here if they know what is going on? >> >> >> >> >> >> ______________________________________________________________ >> 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 >> > ______________________________________________________________ > 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 ______________________________________________________________ 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 va3bxg
Hi Robert,
> ....i noticed that i had a 0.1 drift on the LCD readout VFOA. the > readout > had dropped by that much.. in fact it did more then once.... This shouldn't happen if you adjust the VFO knob height so the bottom of the knob is lightly touching the felt pad. I'm also looking at a firmware change that would prevent the occasional 1-tic drift due to physical asymmetry in the knob. Maintaining contact with the felt pad would then be less of an issue. > ....i removed all wires etc from the radio, and found that > there was a lot of noise. even my buddy, who has been a ham for many > years wondered what was happening. and what is happening. The KX3's receiver has a lot of gain and excellent sensitivity. You may simply have gains set at max, in which case you'll hear background receiver noise. Typically you don't need the preamp on 160-40 meters; if you turn it off, most of the noise should go away, and if you then connect an antenna, atmospheric noise should completely dominate. Let me know if you have further questions. 73, Wayne N6KR ______________________________________________________________ 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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