Re: [Elecraft] Elecraft AX-1 Whip Antenna
> On Sep 22, 2022, at 9:47 AM, Jim Clymer wrote: > > > > On Thu, Sep 22, 2022, 11:28 AM Wayne Burdick wrote: > Yes indeed. > > This is why you need an ATU when using such antennas. The ATU can correct for > terrain, counterpoise length and deployment, body capacitance, conductors > associated with other connected devices, etc. > > Wayne > > So that would lead me to believe that matching requirements for bicycle > mobile with a trailing counterpoise would be a moving target. I haven't tried that myself but yeah, probably. However, radios like the KX2 and KX3 are tolerant of dynamic SWR variations. For example if you hit the ATU button at some point and the SWR goes to 1:1, then walk (or bike) over varied terrain that causes the SWR To vary from 1:1 to 2:1, the radio won't complain. Only if the SWR gets really high will power rollback occur. Without the ATU, and using an electrically short/narrowband antenna, you might see SWR vary from 1:1 to 10:1. Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K4 Youtube Videos
Hi Guys, I am not seeing very much in the way of Youtube videos for K4 in comparison to TS890, IC7610, Ftdx101. With more K4's being delivered lately maybe someone will do some everyday SSB/Cw demo videos? ;-) de Wb8yqj Don Carlsbad, Ca. USA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Elecraft AX-1 Whip Antenna
On Thu, Sep 22, 2022, 11:28 AM Wayne Burdick wrote: > Yes indeed. > > This is why you need an ATU when using such antennas. The ATU can correct > for terrain, counterpoise length and deployment, body capacitance, > conductors associated with other connected devices, etc. > > Wayne > So that would lead me to believe that matching requirements for bicycle > mobile with a trailing counterpoise would be a moving target. Jim - WS6X > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Elecraft AX-1 Whip Antenna
Yes indeed. This is why you need an ATU when using such antennas. The ATU can correct for terrain, counterpoise length and deployment, body capacitance, conductors associated with other connected devices, etc. Wayne > On Sep 21, 2022, at 11:52 PM, Dave (NK7Z) wrote: > > Then I believe the case, and everything connected to the case ground, will > become part of the antenna system. > > 73, > Dave, > https://www.nk7z.net > On 9/21/22 23:08, Wayne Burdick wrote: >>> So yes, it CAN be a fact that the coax feedline to the AX1 could be doing >>> more of the radiating than the whip, depending on length. :) >>> >>> 73, Jim K9YC >> The primary use-case for the AX1 is directly attached the radio -- coax >> length zero. >> Wayne >> N6KR >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to d...@nk7z.net > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to n...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Elecraft AX-1 Whip Antenna
On 9/21/2022 11:52 PM, Dave (NK7Z) wrote: Then I believe the case, and everything connected to the case ground, will become part of the antenna system. Yep. The counterpoise for VHF/UHF talkies is the operator's body, capacity coupled to the case. It's also possible to improve TX slightly (a dB or two) by adding a quarter-wave wire under the screw-on mount for the antenna. That's equivalent to Wayne suggests by trailing a wire. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
