Re: [Elecraft] K3 KX3 running winmor
I'm running RMSExpress 1.2.27.0 / WINMOR 1.5.7.0 and I'm seeing the same problem. It clicks the K3 over to USB mode instead of DATA mode. USB Digital is selected in WINMOR setup too. The bug was reported back in Jan (I believe) and from what I can see it hasn't been fixed. Frank KG6EYC On Fri, May 16, 2014 at 4:55 PM, Joel Black wrote: > Hmm... I don't seem to have this issue with my K3. I use RMSExpress and > WINMOR on both amateur bands and MARS frequencies. > > Make sure you're running the latest version of RMSExpress and WINMOR. > There was an issue with a version released since the beginning of the year > where the radio would go into USB mode instead of DATA A. > > 73, > Joel - W4JBB > > > On 5/16/14, 9:54 AM, K7JLTextra wrote: > >> I run Winmor on my K3 & KX3 and find it very frustrating that Winmor >> resets the mode back to SSB with each automatic frequency change. I need >> the mode to be set to DATA A so that the compression & Equalizers are >> disabled, ALC is optimized, and for the K3 the rear panel connectors are >> enabled. Are there other Winmor user that would like to see the WL2K >> development group make some changes to fix this problem? >> >> John Hendricks K7JLT >> __ >> 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 w4...@charter.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 vad...@gmail.com > -- CW: NAQCC #6554 | SKCC #10435 | FISTS #16155 | SOC #1038 | FPQRP #3186 Digital: FHC #4224 | 30MDG #6370 | DMC #5698 Gear: K3 #7164 | P3 #3134 | KX3 #1787 http://vadept.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] I got big heavy knobs...
Hi Eric, Thank you for that... I would not have thought about that! -- Thanks and 73's, For equipment, and software setups and reviews see: www.nk7z.net for MixW support see; http://groups.yahoo.com/neo/groups/mixw/info for Dopplergram information see: http://groups.yahoo.com/neo/groups/dopplergram/info for MM-SSTV see: http://groups.yahoo.com/neo/groups/MM-SSTV/info On Fri, 2014-05-16 at 23:27 -0400, Eric Swartz WA6HHQ - Elecraft wrote: > One important note: If you ship or your radio or check it as luggage, make > sure to remove the heavy after-market knobs. We have seen damage to the > encoder shafts from shocks encountered in shipment when these knobs were left > installed. > > 73, > > Eric (Recovering from day one of Dayton..) > elecraft.com > _..._ > > > > > On May 16, 2014, at 1:32 PM, David Cole wrote: > > > > Hello, > > X-Scanned: 4PSA Clean Server on May 16 10:32:50 > > > > I have received a large number of private replies indicating that the > > Elecraft encoders are up to the job. Thanks to all for the info... > > > > -- > > Thanks and 73's, > > For equipment, and software setups and reviews see: > > www.nk7z.net > > for MixW support see; > > http://groups.yahoo.com/neo/groups/mixw/info > > for Dopplergram information see: > > http://groups.yahoo.com/neo/groups/dopplergram/info > > for MM-SSTV see: > > http://groups.yahoo.com/neo/groups/MM-SSTV/info > > > > > > > > > > __ > > 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 elist_c...@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] KXPA100 f/w 1.28 now production released
Elecraft is right on top of it; I'm also confident we'll have a solution fairly soon. 73, Matt VK2RQ > On 17 May 2014, at 1:52 pm, Ron Cowherd wrote: > > Yes, I have also had similar problems with the KXPA100 (SN#0876)and have > already composed and sent a letter to support. The letter is much too > detailed to reproduce here but I also suspected a firmware glitch. My unit > was working flawlessly until the upgrade. I'm sure the problem will soon be > solved. > > 73, Ron K4GYD > > Sent from my iPad > >> On May 16, 2014, at 6:56 PM, Matt VK2RQ wrote: >> >> How are people finding this new firmware? >> >> I've been having problems recently with my KXPA100, where it intermittently >> shows high SWR for a brief moment, and then either recovers or puts itself >> in bypass. At first I thought I had an issue with my antenna, but I >> discovered it was happening with a dummy load too. It mostly happens on SSB, >> but it happens to a lesser extent CW. It also happens with both my KX3 with >> integrated cable, and with my K2 using the keying line. I pulled the amp >> apart, looking for poor connections and dry joints, but no success there. By >> gently blowing across the mike, I was able to get it into the failure mode, >> and stay there. The SWR bridge in the amp was reading high. I had a >> crossneedle SWR meter between the radio and the amp, but as I blew >> progressively harder into the mike, the SWR on the meter was low. Then, once >> the power applied reached a certain level, the amp would come good again. >> This made me suspect whether the band auto-sensing may have been switching >> in a wrong LPF? >> >> Then last night, I reflashed the amp with release firmware 1.28, but still >> had the problem. Then I downgraded the firmware on the amp from 1.28 to >> 1.09, which was the release my amp was shipped with. I haven't observed or >> been able to reproduce the problem since. This is now leading me to suspect >> a possible bug in the 1.28 firmware? >> >> I'm wondering if anyone else may have observed any strange glitches with the >> 1.28 firmware? >> >> 73, Matt VK2RQ >> >>> On 3 May 2014, at 2:14 am, Eric Swartz - WA6HHQ, Elecraft >>> wrote: >>> >>> KXPA100 Production Firmware MCU 1.28 has been released to production status >>> and is now shipping. >>> >>> Important: This version of firmware has new features that require the very >>> latest KXPA100 Utility. >>> >>> We recommend all KXPA100 owners upgrade to the latest KXPA100 utility and >>> to KXPA100 MCU 1.28. >>> >>> >>> Some of the Key Changes in this release: >>> >>> - Better tolerates forward and reflected power overshoot for brief periods >>> to support external antenna tuners. Use approximately 10-20 watts of >>> KXPA100 output when tuning. >>> >>> - When the attenuator is acquired because of SWR or high reflected power, >>> release attenuator immediately on next key up if SWR has been reduced to >>> 3:1 or less. >>> >>> - Update band voltage tables for ICOM 703 and Yaesu FT-817 >>> >>> - Reduce power required for ATU tune. >>> >>> - Add per-band Antenna configuration (requires the new KXPA Utility for >>> user interface) >>> >>> - Improved RS232 handling for 3rd party applications. (Ham Radio Deluxe >>> v6.2, PigKnob, etc.) >>> >>> >>> 73, >>> Eric >>> 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 matt.vk...@gmail.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 roncowh...@aol.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] KXPA100 f/w 1.28 now production released
Yes, I have also had similar problems with the KXPA100 (SN#0876)and have already composed and sent a letter to support. The letter is much too detailed to reproduce here but I also suspected a firmware glitch. My unit was working flawlessly until the upgrade. I'm sure the problem will soon be solved. 73, Ron K4GYD Sent from my iPad > On May 16, 2014, at 6:56 PM, Matt VK2RQ wrote: > > How are people finding this new firmware? > > I've been having problems recently with my KXPA100, where it intermittently > shows high SWR for a brief moment, and then either recovers or puts itself in > bypass. At first I thought I had an issue with my antenna, but I discovered > it was happening with a dummy load too. It mostly happens on SSB, but it > happens to a lesser extent CW. It also happens with both my KX3 with > integrated cable, and with my K2 using the keying line. I pulled the amp > apart, looking for poor connections and dry joints, but no success there. By > gently blowing across the mike, I was able to get it into the failure mode, > and stay there. The SWR bridge in the amp was reading high. I had a > crossneedle SWR meter between the radio and the amp, but as I blew > progressively harder into the mike, the SWR on the meter was low. Then, once > the power applied reached a certain level, the amp would come good again. > This made me suspect whether the band auto-sensing may have been switching in > a wrong LPF? > > Then last night, I reflashed the amp with release firmware 1.28, but still > had the problem. Then I downgraded the firmware on the amp from 1.28 to 1.09, > which was the release my amp was shipped with. I haven't observed or been > able to reproduce the problem since. This is now leading me to suspect a > possible bug in the 1.28 firmware? > > I'm wondering if anyone else may have observed any strange glitches with the > 1.28 firmware? > > 73, Matt VK2RQ > >> On 3 May 2014, at 2:14 am, Eric Swartz - WA6HHQ, Elecraft >> wrote: >> >> KXPA100 Production Firmware MCU 1.28 has been released to production status >> and is now shipping. >> >> Important: This version of firmware has new features that require the very >> latest KXPA100 Utility. >> >> We recommend all KXPA100 owners upgrade to the latest KXPA100 utility and to >> KXPA100 MCU 1.28. >> >> >> Some of the Key Changes in this release: >> >> - Better tolerates forward and reflected power overshoot for brief periods >> to support external antenna tuners. Use approximately 10-20 watts of KXPA100 >> output when tuning. >> >> - When the attenuator is acquired because of SWR or high reflected power, >> release attenuator immediately on next key up if SWR has been reduced to 3:1 >> or less. >> >> - Update band voltage tables for ICOM 703 and Yaesu FT-817 >> >> - Reduce power required for ATU tune. >> >> - Add per-band Antenna configuration (requires the new KXPA Utility for user >> interface) >> >> - Improved RS232 handling for 3rd party applications. (Ham Radio Deluxe >> v6.2, PigKnob, etc.) >> >> >> 73, >> Eric >> 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 matt.vk...@gmail.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 roncowh...@aol.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] I got big heavy knobs...
One important note: If you ship or your radio or check it as luggage, make sure to remove the heavy after-market knobs. We have seen damage to the encoder shafts from shocks encountered in shipment when these knobs were left installed. 73, Eric (Recovering from day one of Dayton..) elecraft.com _..._ > On May 16, 2014, at 1:32 PM, David Cole wrote: > > Hello, > X-Scanned: 4PSA Clean Server on May 16 10:32:50 > > I have received a large number of private replies indicating that the > Elecraft encoders are up to the job. Thanks to all for the info... > > -- > Thanks and 73's, > For equipment, and software setups and reviews see: > www.nk7z.net > for MixW support see; > http://groups.yahoo.com/neo/groups/mixw/info > for Dopplergram information see: > http://groups.yahoo.com/neo/groups/dopplergram/info > for MM-SSTV see: > http://groups.yahoo.com/neo/groups/MM-SSTV/info > > > > > __ > 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 elist_c...@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] KX3-2M and -4M now available to order
Hi Mike, Answers below: We will be updating the FAQ shortly with the latest specs. I believe this is total RX current, but only during active receive. The RX current is much lower than this as we have now implemented the battery save mode like most HTs, where the rx can be user set to be sampled at regular intervals when squelched, with it in low current standby otherwise. Yes, you can turn off the 2M option from the menu if desired. The Squelched current is the total current draw. The factory installed price is the same for new KX3s getting the 2M option and for those returned to the factory for installation of the option. While not overly difficult, the 2M option does take more time than the simple plugging in of a board like the KXAT3. Factory installation also involves specific routing and installation of several thin coax cables and PCB insertion of micro coax RF connectors, along with a full factory test of the installed 2M option and the rest of the KX3 after installation to make sure Hf operation was not disturbed. We try to test to a level above that normally required for field installations of the option. Eric 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
[Elecraft] W6SFM Bug Roundup Event starts tomorrow!
This is a general announcement to remind those interested that the W6SFM Samuel F Morse Amateur Radio Club will be holding its Semi Annual Bug Roundup event tomorrow, May 17th starting from 1700 UTC though Sunday 0500 UTC. This 12-hour event is not a contest; rather it is a time dedicated to celebrating our CW and Bug key heritage. Participants are encouraged to get on the air and simply make enjoyable, conversational CW QSOs using a Bug style key as the sending instrument. For more information including Rules and where to send your logs after the event please visit our Bug Roundup web page located at: http://www.w6sfm.com/Bug_Roundup.html We hope to hear you on the air tomorrow! 73 W6SFM __ 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] KXPA100 f/w 1.28 now production released
How are people finding this new firmware? I've been having problems recently with my KXPA100, where it intermittently shows high SWR for a brief moment, and then either recovers or puts itself in bypass. At first I thought I had an issue with my antenna, but I discovered it was happening with a dummy load too. It mostly happens on SSB, but it happens to a lesser extent CW. It also happens with both my KX3 with integrated cable, and with my K2 using the keying line. I pulled the amp apart, looking for poor connections and dry joints, but no success there. By gently blowing across the mike, I was able to get it into the failure mode, and stay there. The SWR bridge in the amp was reading high. I had a crossneedle SWR meter between the radio and the amp, but as I blew progressively harder into the mike, the SWR on the meter was low. Then, once the power applied reached a certain level, the amp would come good again. This made me suspect whether the band auto-sensing may have been switching in a wrong LPF? Then last night, I reflashed the amp with release firmware 1.28, but still had the problem. Then I downgraded the firmware on the amp from 1.28 to 1.09, which was the release my amp was shipped with. I haven't observed or been able to reproduce the problem since. This is now leading me to suspect a possible bug in the 1.28 firmware? I'm wondering if anyone else may have observed any strange glitches with the 1.28 firmware? 73, Matt VK2RQ On 3 May 2014, at 2:14 am, Eric Swartz - WA6HHQ, Elecraft wrote: > KXPA100 Production Firmware MCU 1.28 has been released to production status > and is now shipping. > > Important: This version of firmware has new features that require the very > latest KXPA100 Utility. > > We recommend all KXPA100 owners upgrade to the latest KXPA100 utility and to > KXPA100 MCU 1.28. > > > Some of the Key Changes in this release: > > - Better tolerates forward and reflected power overshoot for brief periods to > support external antenna tuners. Use approximately 10-20 watts of KXPA100 > output when tuning. > > - When the attenuator is acquired because of SWR or high reflected power, > release attenuator immediately on next key up if SWR has been reduced to 3:1 > or less. > > - Update band voltage tables for ICOM 703 and Yaesu FT-817 > > - Reduce power required for ATU tune. > > - Add per-band Antenna configuration (requires the new KXPA Utility for user > interface) > > - Improved RS232 handling for 3rd party applications. (Ham Radio Deluxe v6.2, > PigKnob, etc.) > > > 73, > Eric > 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 matt.vk...@gmail.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] K3 KX3 running winmor
Hmm... I don't seem to have this issue with my K3. I use RMSExpress and WINMOR on both amateur bands and MARS frequencies. Make sure you're running the latest version of RMSExpress and WINMOR. There was an issue with a version released since the beginning of the year where the radio would go into USB mode instead of DATA A. 73, Joel - W4JBB On 5/16/14, 9:54 AM, K7JLTextra wrote: I run Winmor on my K3 & KX3 and find it very frustrating that Winmor resets the mode back to SSB with each automatic frequency change. I need the mode to be set to DATA A so that the compression & Equalizers are disabled, ALC is optimized, and for the K3 the rear panel connectors are enabled. Are there other Winmor user that would like to see the WL2K development group make some changes to fix this problem? John Hendricks K7JLT __ 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 w4...@charter.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 arch...@mail-archive.com
Re: [Elecraft] OT: US Signal Corps rhombic book
Thanks for the pointer. It is available at archive.org in several formats. https://archive.org/details/TM11-666 wunder K6WRU On May 16, 2014, at 4:23 PM, Mel Farrer via Elecraft wrote: > I'll also throw in a bit. Department of the Army, Tech Manual, TM 11-666, > also has a lot of information on the rhombic designs and implementation, as > well as a lot more. Mine is well worn and dated February 1953. > > > Mel, K6KBE > > On Friday, May 16, 2014 4:08 PM, Mike Markowski wrote: > > > > Sorry, gang, seems I posted my last note as html which I was told was > stripped resulting in an empty message. Original follows. > = > > Hi all, > > Are any interested in a pdf of > >"Construction of a Rhombic Receiving Antenna," US Army Signal Corps, > March 20, 1943 > > It's 37 pages long, 15 pages of which are text and the rest tables & > drawings, and is7.3 MBytes. It lays out the heavy duty design of > rhombics as built by the then-US War Dept, not a backyard ham antenna > project! But a ham or club lucky enough to have enough land and spare > change might make use of it. Also, it contains no theory whatsoever. > "Rhombic Antenna Design," by AE Harper, Bell Telephone Laboratories, > 1941 is a good and similar vintage companion in that regard. Harper's > report also contains construction details. > > I've mentioned it before on this list, but before US Army Ft. Monmouth, > NJ closed a few years ago I enjoyed using their one surviving rhombic of > the 2 originals. Thinking of how much fun that was got me reading up on > rhombics recently. Some photos of that shack just prior to shut down: > http://udel.edu/~mm/ham/monmouth/ > > 73, > Mike ab3ap > __ > 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 farrerfo...@yahoo.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 wun...@wunderwood.org -- Walter Underwood wun...@wunderwood.org __ 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] OT: US Signal Corps rhombic book
I'll also throw in a bit. Department of the Army, Tech Manual, TM 11-666, also has a lot of information on the rhombic designs and implementation, as well as a lot more. Mine is well worn and dated February 1953. Mel, K6KBE On Friday, May 16, 2014 4:08 PM, Mike Markowski wrote: Sorry, gang, seems I posted my last note as html which I was told was stripped resulting in an empty message. Original follows. = Hi all, Are any interested in a pdf of "Construction of a Rhombic Receiving Antenna," US Army Signal Corps, March 20, 1943 It's 37 pages long, 15 pages of which are text and the rest tables & drawings, and is7.3 MBytes. It lays out the heavy duty design of rhombics as built by the then-US War Dept, not a backyard ham antenna project! But a ham or club lucky enough to have enough land and spare change might make use of it. Also, it contains no theory whatsoever. "Rhombic Antenna Design," by AE Harper, Bell Telephone Laboratories, 1941 is a good and similar vintage companion in that regard. Harper's report also contains construction details. I've mentioned it before on this list, but before US Army Ft. Monmouth, NJ closed a few years ago I enjoyed using their one surviving rhombic of the 2 originals. Thinking of how much fun that was got me reading up on rhombics recently. Some photos of that shack just prior to shut down: http://udel.edu/~mm/ham/monmouth/ 73, Mike ab3ap __ 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 farrerfo...@yahoo.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] OT: US Signal Corps rhombic book
The last year of my enlistment was spent as one of three operators selected to reopen K2USA in 1964. General "Duffy" Brown, a ham, was embarrassed to discover that the station was boarded up and couldn't participate in traffic concerning the AK earthquake. I left my slot as a crypto instructor at the Signal School for this opportunity. Gen. Brown assigned the task to a Major whose name escapes me (Norm something). He was our CO. SFC Wm (Scotty) Scot was in charge, SP5 Jim Dishaw and I were operators. But since we were all hams, Scotty "found" some non-ham radio operators on post who handled all of our MARS obligations (using Studio 2 in the photos), leaving the three of us to play ham radio with studios full of KWM-2As , S-Lines, some Hallicrafters, etc. Most of our time was spent troubleshooting and repairing the equipment to get it operational. The KWM-2As we liberated from various sources on Fort Monmouth. I sat in a sling on the end of a crane atop every freakin' one of those 90' telephone poles getting the Telex monoband beams operational. I didn't like that part much. The rhombic was sometimes used for phone patches to SE Asia, but the beams usually worked better. I can't remember what the rhombic was terminated on at the time. I believe it was changed later. I used to break into QSOs between a couple VKs talking ground wave who were discussing how the band had closed. It was sometimes a magic antenna, but not always. BTW, the license trustee, Mike Reason (W2EXU) was a local civilian who hung out at the MARS station and helped out a lot. He's a really nice guy who later made his career in civil service there at Fort Monmouth. My wife and I visited with him on a motorcycle trip in 1985. I having talked to him in a long while, but maybe you met him when you were there. Eric KE6US On 5/16/2014 2:04 PM, Mike Markowski wrote: Sorry, gang, seems I posted my last note as html which I was told was stripped resulting in an empty message. Original follows. = Hi all, Are any interested in a pdf of "Construction of a Rhombic Receiving Antenna," US Army Signal Corps, March 20, 1943 It's 37 pages long, 15 pages of which are text and the rest tables & drawings, and is7.3 MBytes. It lays out the heavy duty design of rhombics as built by the then-US War Dept, not a backyard ham antenna project! But a ham or club lucky enough to have enough land and spare change might make use of it. Also, it contains no theory whatsoever. "Rhombic Antenna Design," by AE Harper, Bell Telephone Laboratories, 1941 is a good and similar vintage companion in that regard. Harper's report also contains construction details. I've mentioned it before on this list, but before US Army Ft. Monmouth, NJ closed a few years ago I enjoyed using their one surviving rhombic of the 2 originals. Thinking of how much fun that was got me reading up on rhombics recently. Some photos of that shack just prior to shut down: http://udel.edu/~mm/ham/monmouth/ 73, Mike ab3ap __ 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 eric_c...@hotmail.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
[Elecraft] OT: US Signal Corps rhombic book
Sorry, gang, seems I posted my last note as html which I was told was stripped resulting in an empty message. Original follows. = Hi all, Are any interested in a pdf of "Construction of a Rhombic Receiving Antenna," US Army Signal Corps, March 20, 1943 It's 37 pages long, 15 pages of which are text and the rest tables & drawings, and is7.3 MBytes. It lays out the heavy duty design of rhombics as built by the then-US War Dept, not a backyard ham antenna project! But a ham or club lucky enough to have enough land and spare change might make use of it. Also, it contains no theory whatsoever. "Rhombic Antenna Design," by AE Harper, Bell Telephone Laboratories, 1941 is a good and similar vintage companion in that regard. Harper's report also contains construction details. I've mentioned it before on this list, but before US Army Ft. Monmouth, NJ closed a few years ago I enjoyed using their one surviving rhombic of the 2 originals. Thinking of how much fun that was got me reading up on rhombics recently. Some photos of that shack just prior to shut down: http://udel.edu/~mm/ham/monmouth/ 73, Mike ab3ap __ 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] FS K3/10F & K3/100F Dayton Flea market 3618
Both radio factory built & have following options: KXV3A, KDVR3, 2.8KC, 2.1KC, 1.0KC, 400HZ Boxes and manuals. 73, Tim K9TM __ 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] 270 foot (ish) Doublet & K3 ATU
Sure it does, you're changing the line losses, tweaking C and L and therefore the SWR (always measured at the tuner, but moving peaks and valleys closer/further away from that point) any time you alter the system. There are specific resonant points in an antenna system (typically each half wavelength). The goal is to make one of them at the radio. In a multiband antenna, this is um, challenging if not impossible. The common mode choke stops any into the shack, but what is varying is the coax from rig to choke. Those losses change and resonant portions of the feed system change so I'd expect to see the tuning change. The odd part is no major difference from 70' of window line to 100'. My presumption is that the antenna is simply too close to dirt, so changes are more subtle or masked. The coax portion (if used) should be as short as feasible to keep line losses low. If you can't, you'll have to accept the losses; sometimes I use 35' instead of 10' so I can be more effective (get a better tune) on the bottom of 80M and run the amp. Signal loss is not as significant there and receiver gain is far more than ample. I won't do that on 10M where the loss is major (2-3 S units). It's a system, not just a bunch of pieces. They all add up. FWIW, 170' per leg of the dipole is 5/8 wave mid 75 meters; not a resonant antenna. It requires a tuner. If the OP has time and the space, an intriguing option is the 160 full wave loop. It resonates in every ham band or close enough. Only the 160 M loop does this, an 80 M loop does not. I don't have the real estate, or tall trees. So for field day, a meadow with enough tall trees on the edge... Hmmm... 73, Rick wa6nhc Tiny iPhone 5 keypad, typos are inevitable > On May 15, 2014, at 1:33 PM, "Wes (N7WS)" wrote: > > This makes no logical sense, unless you have a big common-mode problem. > > Wes N7WS > > > >> On 5/15/2014 12:54 PM, Rick Bates, WA6NHC wrote: >> Changing the length of the coax portion has a HUGE impact on where (or if) >> the system tunes; the window line, none. > > __ > 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 happymooseph...@gmail.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
[Elecraft] OT: US Signal Corps rhombic book
__ 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] Programmers Reference Questions
I've found a solution with python... The problem was getting it to not
interpret '\xB2' as an escape sequence, so I just re-encode it with string
escapes, then do a string replacement:
>>> source = 'DS@1\xB200\xB325\x80\x90'
>>> source2 = source.encode('string-escape').replace(r'\xb', '.')
>>> freq = source2[2:12].replace('@','').zfill(10)
>>> freq
'01.200.325'
Thanks for all the replies!
-Dave
-Original Message-
From: "Bill Noyce"
Sent: Friday, May 16, 2014 1:18pm
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Programmers Reference Questions
David Patino asks:
> But the responses I'm seeing from
> the KX3 don't appear to follow this
> layout. Given an active frequency of
> 1.200.325 the response is:
>
> DS@1\xB200\xB325\x80\x90;
>
> The appears to be the active
> frequency in plain text, replacing
> spaces with @'s and .'s with \xB,
> only the last two entries for icon
> data and extended data are 8-bit
> bytes expressed in hex.
It looks like the digits are in plain ASCII, as suggested by the note that
the minimum value is 0x30 (the ASCII code for "0"). The digits with a
decimal point to their left are encoded as ASCII+0x80, so for example ".2"
appears as "0xB2" because 0x32+0x80=0xB2.
This would be clearer if each byte of the response is presented on its own
line:
D
S
@
1
\xB2
0
0
\xB3
2
5
\x80
\x90
;
Hope this helps,
-- Bill, AB1AV
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Re: [Elecraft] K3 KX3 running Winmor
John Hendricks K7JLTsays: > run Winmor on my K3 & KX3 and > find it very frustrating that Winmor > resets the mode back to SSB with > each automatic frequency change. If you're using Winmor through RMS Express, go into Rig Configuration in a Winmor session. Make sure you have selected "Elecraft K3/KX3" and select "USB Digital" as the mode. Make sure you have the most current version; there was a version a couple of months ago that didn't distinguish K3 from K3/KX3, with the result that this commanded LSB on the K3 and KX3. -- Bill, AB1AV __ 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] I got big heavy knobs...
The extra weight is not a problem. I've been using them for years with no issues. They are wonderful. 73, Doug -- K0DXV On 5/16/2014 9:53 AM, David Cole wrote: Hi all, I have just purchased a set of those all metal knobs for my K3... I did not really realize just how heavy they were... The thought then occurred to me that the encoder shafts for both the main and the sub tuning may not be able to take the additional weight... Is this a valid worry? If you are using these knobs, how long have you had them on? Does anyone know if the encoder bearings are metal or is it just a plastic encoder shaft bearing? __ 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] Programmers Reference Questions
David Patino asks: > But the responses I'm seeing from > the KX3 don't appear to follow this > layout. Given an active frequency of > 1.200.325 the response is: > > DS@1\xB200\xB325\x80\x90; > > The appears to be the active > frequency in plain text, replacing > spaces with @'s and .'s with \xB, > only the last two entries for icon > data and extended data are 8-bit > bytes expressed in hex. It looks like the digits are in plain ASCII, as suggested by the note that the minimum value is 0x30 (the ASCII code for "0"). The digits with a decimal point to their left are encoded as ASCII+0x80, so for example ".2" appears as "0xB2" because 0x32+0x80=0xB2. This would be clearer if each byte of the response is presented on its own line: D S @ 1 \xB2 0 0 \xB3 2 5 \x80 \x90 ; Hope this helps, -- Bill, AB1AV __ 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] KX3-2M and -4M now available to order
Lyle wrote in response to my FAQ questions: > It is the total KX3 current drain. > Just set a band other than 2 meters, and the 2 meter module will power down. > Manuals etc will be on the website in due time. Thanks for the quick and clear responses. This looks like a "must-have" option! I think the FAQ would be improved by incorporating the information that you provided. 73, Mike / KK5F __ 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] I got big heavy knobs...
Hello, I have received a large number of private replies indicating that the Elecraft encoders are up to the job. Thanks to all for the info... -- Thanks and 73's, For equipment, and software setups and reviews see: www.nk7z.net for MixW support see; http://groups.yahoo.com/neo/groups/mixw/info for Dopplergram information see: http://groups.yahoo.com/neo/groups/dopplergram/info for MM-SSTV see: http://groups.yahoo.com/neo/groups/MM-SSTV/info __ 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] KX3-2M and -4M now available to order
Mike, see below: Eric wrote: The KX3 2M FAQ, which will also apply to the -4M, can be reached at: http://www.elecraft.com/manual/KX3-2M%20FAQ.htm The FAQ question that follows raises a number of additional questions: Q: What is the current drain on 2 meters? A: Current drain is typically 300-350 mA on receive and 1.5 A on transmit at 3 watts, running from a 14 V supply. Is that the *TOTAL* current drawn by the KX3 with KX3-2M installed, or is this *ADDITIONAL* current draw to that of the KX3 without KX3-2M? It is the total KX3 current drain. Is there a front panel function that may be used to turn off the KX3-2M and restore the pre-installation KX3 current consumption when 2m isn't desired? Just set a band other than 2 meters, and the 2 meter module will power down. We're also working on a standby mode (when squelched) that should reduce average current drain to between 180 and 200 mA, depending on the dwell time selected by the user. I have the same question...is this squelched current draw in addition to the normal KX3 current draw? It is the total current drain, not additional current drain. And the standby mode is already implemented -- the FAQ was written before the firmware :-) The KX3-2M and -4m specific order page is at the following address. http://www.elecraft.com/tmp/kx3_2m_4m.html The $60 premium charged for factory installation implies that there's some notable time and effort required. Is this an accurate anticipation? Will the factory-installation premium be the same for new KX3 units ordered with the KX3-2m option? FT units have typically taken 30 to 60 minutes to install depending on the individual doing it. Open the case, remove the ATU (if present), install the SMA cable, snap in the LO cable, re-install the ATU (or the interface board if no ATU was present), install the 2 M module (2 screws), snap on the shield cover, inspect your work, then close the case. Enable the module through the menu and you're ready to go. Manuals etc will be on the website in due time. 73, Lyle KK7P __ 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] KX3-2M and -4M now available to order
Eric wrote: > The KX3 2M FAQ, which will also apply to the -4M, can be reached at: > http://www.elecraft.com/manual/KX3-2M%20FAQ.htm The FAQ question that follows raises a number of additional questions: > Q: What is the current drain on 2 meters? > > A: Current drain is typically 300-350 mA on receive and 1.5 A on transmit > at 3 watts, running from a 14 V supply. Is that the *TOTAL* current drawn by the KX3 with KX3-2M installed, or is this *ADDITIONAL* current draw to that of the KX3 without KX3-2M? Is there a front panel function that may be used to turn off the KX3-2M and restore the pre-installation KX3 current consumption when 2m isn't desired? >We're also working on a standby mode (when squelched) that should reduce >average current drain to between 180 and 200 mA, depending on the dwell >time selected by the user. I have the same question...is this squelched current draw in addition to the normal KX3 current draw? > The KX3-2M and -4m specific order page is at the following address. > > http://www.elecraft.com/tmp/kx3_2m_4m.html The $60 premium charged for factory installation implies that there's some notable time and effort required. Is this an accurate anticipation? Will the factory-installation premium be the same for new KX3 units ordered with the KX3-2m option? Thanks, Mike / KK5F __ 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] K3 KX3 running winmor
I know that it's "best practice" to use DATA A mode for digital, but I use Winmor all the time in SSB mode and don't run into any problems. I don't even bother turning off the compression and EQ, either. Have you tried it this way, and if so what has your experience been? Tim AE6LX On Fri, May 16, 2014 at 7:54 AM, K7JLTextra wrote: > I run Winmor on my K3 & KX3 and find it very frustrating that Winmor > resets the mode back to SSB with each automatic frequency change. I need > the mode to be set to DATA A so that the compression & Equalizers are > disabled, ALC is optimized, and for the K3 the rear panel connectors are > enabled. Are there other Winmor user that would like to see the WL2K > development group make some changes to fix this problem? > > John Hendricks K7JLT > __ > 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 ae...@worldwidedx.com > -- Owner, worldwidedx.com AE6LX, Amateur Radio NNN0ITA, Navy MARS NNN0GAF FOUR, Southern CA Director Assistant for Training, Navy MARS __ 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] I got big heavy knobs...
I think you’ll find that Elecraft uses a premium ball bearing in their encoder and it is up to the task. 73, David W4DES On May 16, 2014, at 11:53 AM, David Cole wrote: > Hi all, > > I have just purchased a set of those all metal knobs for my K3... I did > not really realize just how heavy they were... > > The thought then occurred to me that the encoder shafts for both the > main and the sub tuning may not be able to take the additional weight... > Is this a valid worry? If you are using these knobs, how long have you > had them on? > > Does anyone know if the encoder bearings are metal or is it just a > plastic encoder shaft bearing? > __ 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] I got big heavy knobs...
Hi all, I have just purchased a set of those all metal knobs for my K3... I did not really realize just how heavy they were... The thought then occurred to me that the encoder shafts for both the main and the sub tuning may not be able to take the additional weight... Is this a valid worry? If you are using these knobs, how long have you had them on? Does anyone know if the encoder bearings are metal or is it just a plastic encoder shaft bearing? -- Thanks and 73's, For equipment, and software setups and reviews see: www.nk7z.net for MixW support see; http://groups.yahoo.com/neo/groups/mixw/info for Dopplergram information see: http://groups.yahoo.com/neo/groups/dopplergram/info for MM-SSTV see: http://groups.yahoo.com/neo/groups/MM-SSTV/info __ 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] K3 KX3 running winmor
I run Winmor on my K3 & KX3 and find it very frustrating that Winmor resets the mode back to SSB with each automatic frequency change. I need the mode to be set to DATA A so that the compression & Equalizers are disabled, ALC is optimized, and for the K3 the rear panel connectors are enabled. Are there other Winmor user that would like to see the WL2K development group make some changes to fix this problem? John Hendricks K7JLT __ 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] KX3-2M can be ordered
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[Elecraft] KX3-2M and -4M now available to order
Hi, We will be taking orders for the KX3 All-Mode 2M and 4M internal options at the Dayton Hamvention Friday. We have now also added a link to the -2M and -4M order page to our regular web order form at: http://www.elecraft.com/elecraft_prod_list.htm The KX3 2M FAQ, which will also apply to the -4M, can be reached at: http://www.elecraft.com/manual/KX3-2M%20FAQ.htm Both transverters should start shipping late July to mid-August. Note that only one of these at a time may be installed in the KX3. The KX3-2M and -4m specific order page is at the following address. http://www.elecraft.com/tmp/kx3_2m_4m.html Note that the 2M and 4M order items with the suffix "NOATU" are for those KX3s that do not have the KXAT3 ATU installed. The 2M and 4M normally plug into the KXAT3. The "NOATU" versions include a special mounting PCB that takes the place of the KXAT3, so that the 2M or 4M XV can be plugged in. We will be adding additional information on these options to our web page once we return from Dayton next week. Thanks again for your interest! 73, Wayne and Eric 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
[Elecraft] 270 foot (ish) Doublet & K3 ATU
Iain, It may be worth going back to basics and reading up on doublet antennas as well as open wire feeders. The critical length is half of the top plus the feeder length and this should be adjusted so that it isn't resonant on any band you wish to use. This because it is easier to match a medium impedance but reactive load rather that a high or low impedance load. The impedance of the feeder is immaterial in this case as are issues of balance so erect whatever you can and enjoy using it. Based on your dimensions of 270ft top and 33ft feeder the critical length will be 168ft which may give trouble on some bands so may I suggest using about 148 to 150ft. Hope your system works out OK 73 Peter G3SMT __ 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
