Re: [Elecraft] OT - G5RV antenna baluns
Back in those days most of my friends did not even own an swr meter, we tuned up by dipping and loading and worked out the power input to the PA to meet the regulations. In later life LV preferred to speak of the ASTU Antenna System Matching Unit. I prefer to use MU for the box in the shack. David G3UNA ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] OT - G5RV antenna baluns
In an issue of Radcom published between 1999 and 2006, which I shall have to find, IIRC there is some comment on the the G5RV with references. If I remember correctly Captain Varney G5RV first published the design in the 1940s, could well have been in 1946, and the antenna was intended to be used on 20m only. The multiband application came later.Will report back ASAP unless somebody else comes up with the history of the G5RV in the meantime. 73, Geoff GM4ESD Ron D'Eau Claire [EMAIL PROTECTED] wrote: From what I can discover, Captain Varney, G5RV, published his antenna design in England in 1946. I was referencing the comments made about it by John D Heys, G3BDQ, in his book Practical Wire Antennas. You are quite right! It seems like everyone who find an article by Captain Varney thought that was the original article! Actually Capt. Varney was a prolific author and active Ham before the war and that continued until the 1990's. His call is now held by the Mid Sussex Amateur Radio Society who writes of him, Louis Varney was the president of M.S.A.R.S. for 37 years until his death in 2000. In later years he was still climbing trees trying to improve on his famous G5RV antanna! (sic) Perhaps one of our friends from G-land can find the original article. It was published in 1946 according to Heys. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Dayton K3 pics
I've posted a couple K3 pics from yesterday at my Web site: http://www.craigr.com/coppermine/index.php?cat=28 Craig NZ0R ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] G5RV
Ref question N2EY ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 S/N plate, Ken Kopp, 2007/05/18
I agree, and feel same. For those of us who took the leap of faith, and bankrolled the introduction of the yet to be seen (by me) K3 - something on the first production K3 rigs - should be unique. A K3 Gold logo (ala Kenwood), a K3 Li logo plate, a unique SN plate on rig. Something visual or unique. Or an internal feature included - that may be only optional in future rigs. Fred, N3CSY K3 Founder's Club Looking for a deal? Find great prices on flights and hotels with Yahoo! FareChase. http://farechase.yahoo.com/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: K3 S/N plate
Ken Kopp - K0PP: Picture this ... a S/N like: 24/200, or 37 of 300 as one sees on artwork. I've never understood the fixation some Elecraft-owners have with their rigs' serial number. John Harper AE5X http://www.ae5x.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] G5RV
Ref question N2EY You will find the original article from G5RV himself on: www.remeeus.eu/hamradio/antennes_tuners/g5rv.htm 73, Rob, PA0RBO, K2 # 2406 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 S/N plate, Ken Kopp, 2007/05/18
Hallo, I agree, and feel same. For those of us who took the leap of faith, and bankrolled the introduction of the I think getting the K3 earlier than later is more than enough reward for the trust we have placed in Elecraft. vy 73 de toby -- DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz) K2 #885, K2/100 #3248 K3/100 #??? ( #200) DOK C12, BCC, DL-QRP-AG ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Embedded S/N
With all the talk of serial numbers I would willing topay a little extra to have the K3 Serial number show up on the displayat start up. I could identify my other Elecraft rigs easily on opening them up but in the case of the K3 I think the inners will all look the same. I think it would be a nice security feature should the rig be stolen etc. Rowland G4APO K2/K1/ KX1/ K3 fully paid to take advantage of the good exchange rates. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
FW: [Elecraft] KX1 High Current
Hi Steve Yes that 30-80 module was a bit tricky but was nice to have. I have about 69ma on 80 meters in receive but not sure what to advise. There are some pretty sharp guys on here that may have some ideas but thought I'ld let you know what readings I had. I also found the atu was a bit touchier than the K1,K2 but with some patience it would work great. Werner N8BB KX1 sn 1656 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Steve Watkins Sent: Saturday, May 19, 2007 1:10 AM To: elecraft@mailman.qth.net Cc: Watti Subject: [Elecraft] KX1 High Current Just completed the 3080 module...more challenging than the KX1 itself. I am experiencing higher current on 80 meters than the manual suggests (65 ma).. I'm seeing 106 ma. This is with the board on the bench, not in the case. I've noted at other places in my Elecraft building experience that the recommended current in the manual has been lower than what is ammended through discussion and errata's ?? Is 106 ma acceptable? Receive on 20 and 40 seem fine. Thanks, Steve ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] G5RV
In a message dated 5/19/07 8:25:36 AM Eastern Daylight Time, [EMAIL PROTECTED] writes: Ref question N2EY You will find the original article from G5RV himself on: www.remeeus.eu/hamradio/antennes_tuners/g5rv.htm Thanks for the link, but it's not the article I was looking for. I'm looking for the first article he wrote describing the classic 102 foot dipole with 31 foot open-line matching section. G5RV described the antenna that bears his call long before 1984. In fact, I have found various references that say the first/original article appeared in 1946, 1958, and 1966. Thanks again for the link 73 de Jim, N2EY ** See what's free at http://www.aol.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 S/N plate,
... Still would like to see a Li SN assignment, for those first production - buying hams. We the Leap of Faith K3 supporters. Or a Special SN, or a functional item inside K3, not normally there. (positraction, 3 dueces, muncy 4-speed, etc.) Heck - even an Li Knob Fred, N3CSY supporters club - (NOT founders!) Give spam the boot. Take control with tough spam protection in the all-new Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/newmail_html.html ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] OT:G5RV thoughts
I realize that this is off-topic but allow me a few thoughts about the ongoing G5RV discussion. I have placed Varney's original paper here: www.k6mhe.com/n7ws/G5RV.PDF Reading this will reveal the following: 1. Varney *did* intend to operate the antenna on multiple bands, although 20-meters was the design center frequency. 2. A version with an all open-wire feeder *is* still a so-called G5RV. Varney even specifies that a version *without* the coax is better on some bands. 3. The only thing magical about the antenna is the choice of radiator length. 4. On 20-meters, the open-wire section of the coax-fed version *is not* a matching section but an impedance repeating section. 5. Varney repeats an often made error when he states that some part or another of the antenna resides in the open-wire line, i.e is folded into the feeder. If this were true we wouldn't need acreage for operation on 160-meters. Wes N7WS Looking for a deal? Find great prices on flights and hotels with Yahoo! FareChase. http://farechase.yahoo.com/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Dayton K3 pics
Nice pics Craig. Thanks. Stan Rife W5EWA Craig Rairdin [EMAIL PROTECTED] wrote: I've posted a couple K3 pics from yesterday at my Web site: http://www.craigr.com/coppermine/index.php?cat=28 Craig NZ0R ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Dayton K3 pics
Izzat T-SHIRTS I see under the K3 in one photo?? !! (:-)) Ken Kopp - K0PP [EMAIL PROTECTED] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Dayton K3 pics
Great pics! But that radio is obviously defective. Does anyone else see the fleas on the bottom side of the planar board? Some of the later rigs seem to be coming that way, must be an infestation the factories. = I've posted a couple K3 pics from yesterday at my Web site: http://www.craigr.com/coppermine/index.php?cat=28 Craig NZ0R ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K1 check
Hi ! I´m working on K1 #2300. Resistance check page 16 says K3 pin 2, K2 *pin 9* 5 ohms. But there are only 8 pins ! Resistance pin 2 to pin 7 reads 2,7 ohms. Any suggestions ? 73 Allan OZ8A ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Dayton K3 pics
It's not a bug, it's a feature. Simon Brown, HB9DRV - Original Message - From: Don Rasmussen [EMAIL PROTECTED] But that radio is obviously defective. Does anyone else see the fleas on the bottom side of the planar board? Some of the later rigs seem to be coming that way, must be an infestation the factories. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K1 check
I think K3 has 10 pins, that's how many I counted on my 80/15 board. John k7up At 10:01 AM 19/05/07, you wrote: Hi ! I´m working on K1 #2300. Resistance check page 16 says K3 pin 2, K2 *pin 9* 5 ohms. But there are only 8 pins ! Resistance pin 2 to pin 7 reads 2,7 ohms. Any suggestions ? 73 Allan OZ8A ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] G5RV
That was published in 1984 covering a multiband affair. According to Heys, G3BDQ, the original G5RV article was published in 1946 for a single band antenna. In fact the biography box on the first page of the linked article says Varney designed the original G5RV in 1946. Varney published several articles about multiband use of his design. There's an update of the article linked below, also by Varney, available on the ARRL web site (www.arrl.org). Varney simply reverted to using his design as a center fed doublet on any band except 20 meters! Of course, a center-fed doublet (random length horizontal wire, broken at the center for low-loss open-wire feedline) has been an well-known, efficient antenna since the 1920's. Varney offered nothing new in his G5RV design except on 20 meters where the length of the horizontal wire coupled with the matching section (33 feet of open wire line of specific size and spacing) produced a tolerably low SWR for common types of feed lines in use in 1946. It needed a matching network between the feedline and the matching section on other bands, and was not optimized for 50 ohm coax even on 20 meters! From the referenced article, Varney writes: Although the impedance match for 75-ohm twin lead or 80-ohm coaxial cable at the base of the matching section is good at 14 MHz, and even the use of 50 ohm coaxial cable results in only about a 1.8:1 SWR on this band, the use of a suitable matching network is necessary on all other HF bands.. Note the terminology: Matching section is the length of open wire line of specific length, wire size and spacing used to match the center of the horizontal wire to a feed line at the lower end. Matching network is what we call today an antenna tuner or ATU. The matching network (ATU) should be at the end of the matching section (open work line), not at the rig. Putting the tuner at the rig adds significant losses to the system depending upon the type and length of feeder used between the rig and the matching section. Also, note that the original design was optimized for 80 ohm coax or 75 ohm twinlead, both of which were fairly common right after WWII. Post WWII rigs with tunable pi-network outputs could handle quite a wide range of feeder impedances efficiently without resorting to an external tuner. We weren't particularly concerned about an SWR of 2:1, 4:1 or more even if we had the means to measure it. So a 1.8:1 SWR was quite good. Of course, with today's fixed-tuned rigs that's crowding the point at which the rig will roll back power or shut down altogether to protect the finals unless a tuner is used at the output to reduce the SWR the rig sees. Used that way, the G5RV is identical to the common multi-band doublet used since the 1920's. It's efficient if: 1) An efficient tuner is used capable of matching the rig to the antenna, and 2) No coax or other lossy feed line is used between the tuner and the radiator. Bottom line is that the practice of putting the tuner at the rig, and running coax between the tuner and the radiator with perhaps a balun or unun thrown in significantly increases the losses. Ron AC7AC -Original Message- Ref question N2EY You will find the original article from G5RV himself on: www.remeeus.eu/hamradio/antennes_tuners/g5rv.htm 73, Rob, PA0RBO, K2 # 2406 ___ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] G5RV
Ron D'Eau Claire wrote: Used that way, the G5RV is identical to the common multi-band doublet used since the 1920's. It's efficient if: 1) An efficient tuner is used capable of matching the rig to the antenna, and 2) No coax or other lossy feed line is used between the tuner and the radiator. Bottom line is that the practice of putting the tuner at the rig, and running coax between the tuner and the radiator with perhaps a balun or unun thrown in significantly increases the losses. Agree absolutely John G3YPZ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] YouTube Film: K3 Wayne
http://www.youtube.com/watch?v=NUxhVKfXf4k vy 73 de toby -- DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz) K2 #885, K2/100 #3248 K3/100 #??? ( #200) DOK C12, BCC, DL-QRP-AG ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] YouTube Film: K3 Wayne
I like the piece on the Hamvention Friday one where the new Yeasu rig is said to be a winner with a 10KHz Roofing Filter! Yeah...so ...! Chris G3SJJ Toby Deinhardt wrote: http://www.youtube.com/watch?v=NUxhVKfXf4k vy 73 de toby ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] YouTube Film: K3 Wayne
Wow - nice. Did you see that silver tongued devil that they hired to impersonate Wayne? Slick. And the preposterous things he was saying about the radio. Sure, they probably got him from Hollywood or something and he has no idea of what he is really saying, but Elecraft come on, this is SHAMELESS. [Elecraft] YouTube Film: K3 Wayne http://www.youtube.com/watch?v=NUxhVKfXf4k vy 73 de toby ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Options
--- In [EMAIL PROTECTED], Roar s-roabr@ wrote: Hi I have maybe a dumb quiz, but which of the the options are within the fully assambled radio K3? Filters etc??? 73 Rag LA6FJA/K3RAG = Here is how I optioned mine. 10 watts, if I like it I'll upgrade it to 100 watts. $1399. Cool. Comes with a 2.7 roofing filter and a noise blanker. Great deal. $99 TXCO - passed on that, I don't need 1 ppm precision when 5 ppm comes with the radio. That's good for CW and SSB (my modes). $99 General Coverage - purchased that, because without it, the ham band filters are engaged and that means serious attenuation of any SWL frequency that is more than a couple hundred kilohertz away from a ham band edge. $120 AM filter - nope, although it's required for AM transmit, 10 meters is the only band where I might use it and I have hollow state rigs for that. $99 FM filter - nope, although it's required for FM transmit, 6 and 10 meters are the places for that and I do CW and SSB there. I'm also not sure about CTSS on the K3. $79 CW Filter - nope, my choice would be 800hz, I'll wait for the variable filters in the couple of years that the bands are soft. What a great starting point for a reliable core station, and I expect there will be all manner of kits that will support the radio, since they would be less likely to require SMT. (fleas). ;-) $539 Subreceiver - for contests, not needed here for search pounce. $99 DVR - for contests, not needed here for search pounce. $259 Auto tuner - not yet. $79 Transverter - not yet. $39 USB adapter - not yet. The biggest selling points of the radio for me are the taylorable AGC and the reputation of Elecraft for designing a radio I can count on. I always use a speaker and enjoy hearing a louder signal when it's bigger. That works all the way up to room filling. There are not many rigs these days that will allow that because the AGC is oppressive and overbearing, ruthless and just plain mean. ;-) de wb8yqj/6 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 size and weight
Don, Re I guess the question is whether the contest crowd will want to stay up all night with a radio this small physically. I can't wait! My FT1000MP is just too big... 73, Henry - K4TMC (part-time SSB contester) In a message dated 5/18/2007 1:05:05 AM Eastern Daylight Time, [EMAIL PROTECTED] writes: I guess the question is whether the contest crowd will want to stay up all night with a radio this small physically. ** See what's free at http://www.aol.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] G5RV
Thanks to the efforts of N7WS and G3VGR, I now have pdfs of the 1958, 1966 and 1984 G5RV articles. What an incredible online community - within a few hours of a request, fellow amateurs a continent and an ocean away supply me with the information. In a message dated 5/19/07 2:34:37 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: Varney simply reverted to using his design as a center fed doublet on any band except 20 meters! Of course, a center-fed doublet (random length horizontal wire, broken at the center for low-loss open-wire feedline) has been an well-known, efficient antenna since the 1920's. Varney offered nothing new in his G5RV design except on 20 meters where the length of the horizontal wire coupled with the matching section (33 feet of open wire line of specific size and spacing) produced a tolerably low SWR for common types of feed lines in use in 1946. It needed a matching network between the feedline and the matching section on other bands, and was not optimized for 50 ohm coax even on 20 meters! I have to disagree with this somewhat. The intent of the G5RV design, IMHO, wasn't to make an optimized antenna for 50 ohm coax or 20 meters, but rather to make one that would be a reasonable compromise for the HF/MF ham bands of the time. From the referenced article, Varney writes: Although the impedance match for 75-ohm twin lead or 80-ohm coaxial cable at the base of the matching section is good at 14 MHz, and even the use of 50 ohm coaxial cable results in only about a 1.8:1 SWR on this band, the use of a suitable matching network is necessary on all other HF bands.. Note the terminology: Matching section is the length of open wire line of specific length, wire size and spacing used to match the center of the horizontal wire to a feed line at the lower end. Matching network is what we call today an antenna tuner or ATU. The matching network (ATU) should be at the end of the matching section (open work line), not at the rig. Putting the tuner at the rig adds significant losses to the system depending upon the type and length of feeder used between the rig and the matching section. Also, note that the original design was optimized for 80 ohm coax or 75 ohm twinlead, both of which were fairly common right after WWII. But the actual added losses of using a tuner at the rig may not be worth worrying about. It all depends on the situation. Post WWII rigs with tunable pi-network outputs could handle quite a wide range of feeder impedances efficiently without resorting to an external tuner. We weren't particularly concerned about an SWR of 2:1, 4:1 or more even if we had the means to measure it. So a 1.8:1 SWR was quite good. Of course, with today's fixed-tuned rigs that's crowding the point at which the rig will roll back power or shut down altogether to protect the finals unless a tuner is used at the output to reduce the SWR the rig sees. Yup. In fact, towards the end of the hollowstate era, the matching range of many tube rigs was quite restricted, so that SWR of more than 2 or 3 to 1 was too much for them. Even with all-open-line feed, G5RV developed something worthwhile. The classic dipole fed with ladder line and a tuner can be made to work on all bands even if random lengths of dipole and feedline are used. But the impedances at the shack-end of the line may be very high, very low, and/or very reactive if this is done. What G5RV did was to come up with a set of values that result in easier-to-match values of impedance at the shack end of the line. 73 de Jim, N2EY ** See what's free at http://www.aol.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] May RFTB
This Sunday evening the Flying Pigs Amateur Radio Club International will be holding its monthly Run For The Bacon. This is a friendly, two hour QRP CW Sprint, which is open to ALL radio amateurs, will last from 9:00 - 11:00PM EDT (0100-0300 UTC Monday). You may work stations once per band on 160, 80, 40, 20, 15 or 10 Meters. Suggested starting frequencies are 1.812, 3.562, 7.044, 14.062, 21.062, and 28.062 MHz. The exchange is RST, S/P/C (State, Province, Country) and Flying Pigs membership number. If you're not a member of the Flying Pigs, and would like to be; then please click on the membership hyperlink on .http://www.gentzow.com/fpqrp/ Otherwise, non-members can just use their output power figure. You can report your score via the Autolog page which can be found at : http://gentzow.com/fpqrp/autolog.asp or you can mail your logs to the address given on the Autolog page. The deadline for logs is May 27th at 2400 UTC. Hope to catch you on the air Sunday evening! 72 es oo Larry W2LJ FP#612 -- 73 de Larry W2LJ QRP - When you care to use the very least! http://www.w2lj.qrpradio.com http://w2lj.blogspot.com/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 S/N plate,
John Harper, AE5X, wrote: I've never understood the fixation some Elecraft-owners have with their rigs' serial number. I was wondering how long it would be before someone with common sense came along. I completely agree with Mr. Harper that we Elecraft owners are much too enamored with serial numbers. These aren't limited-edition European china used for affairs-of-state at Buckingham Palace and autographed by the queen. For heavens sake, they're just radios ... boxes of wires, metal, carbon, plastic, and other unsentimental material. No less a company than Collins is notorious for non-sequential numbering. In fact, the only way of dating a KWM-2 is by the date-numbers etched onto the sides of the crystal-cases, and that's assuming the crystals are original to the rig (and that they had numbers in the first place which not all did). We Americans seem to have developed a propensity over the last decade or so for fawning after idols-du-jour, both human and material. Except to a poorly developed ego, it makes not one scintilla of difference when a given box is manufactured, sold, purchased, or modular-ated. Elecraft as a company, unique as it is, exists to transfer money from your pockets to the owners' pockets. That they have done so by producing a quality product and answering emails is commendable, but that is not their (nor my, nor yours if you're honest) ultimate goal. A comfortable retirement is. That one can have fun and create enjoyment for others along the way is icing on the cake. But the cake is capitalism. Let's get off the kneelers, cool the incense, stop with the mantras and chants, and be adults about this whole K3 business before it becomes the cult it already has. My opinion only . . . 73, Kent Trimble, K9ZTV Jefferson City, MO ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 S/N plate,
On Sat, May 19, 2007 at 10:25:43PM -0500, K9ZTV wrote: Let's get off the kneelers, cool the incense, stop with the mantras and chants, and be adults about this whole K3 business before it becomes the cult it already has. apparently you haven't ventured close enough to the swirling vortex of the reality distortion field to have been sucked in yet... ;-) 73, -- Jeff ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 S/N plate,
K3 announced on reflector at 1 a.m. Missouri time. At 8:15 a.m. they had my credit card number. I am officially one of the distorted. Kent Jeff Davis wrote: apparently you haven't ventured close enough to the swirling vortex of the reality distortion field to have been sucked in yet... ;-) 73, ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Elecraft CW Net Announcement
Good Evening, The seasons are indeed changing. They have gone from grouse calling in the afternoon to saw whet owls calling at night. As the owls file away I keep wondering how such a small bird can make such a loud sound. Then I think of a cricket's stridulations created by rubbing body parts together. Another odd call we have up here is the veery; it creates a tone which rises and falls in tone simultaneously. This reminds me of a passage in Copeland's Appalachian Spring. Where he uses multiple instruments to create the same tonal changes the veery uses one syrinx. I am confused about how they can do that. I just finished tuning the front end of a new transceiver. It now works on receive for both CW and SSB. Next I get to tune the transmit section for best output. However, while listening to the local oscillator and the receive section I had a chance to check both 80 and 40 meters. I know 40 is working fairly well because there is a contest on at this time. They helped me tune the first IF transformer. Then I moved to SSB and found a group of folks chatting. They helped me set the BFO for best tone. I was listening to 20 meters early today while working on my computer. Seems like both bands are working. At the ARES meeting on Tuesday evening one member stated the bands were in terrible shape. I had to differ with him because I had been having a great time working folks on the other side of the world. Then I asked him the crucial question, What mode are you using? He looked at me funny and said, SSB, of course! I demurred in stating the obvious; discretion is often the better part of valor. This soul is the one who runs the ARES Field Day operation. They try to make as many points as possible without getting on the air. Luckily I've found some other folks to work with to get on the air and make contacts from the field. I'll not be working from an EOC but I won't have their S8 noise floor either ;) We are going to have fun and make contacts with other folks who are out to have a good time. Tomorrow: 1) Hail signs (first letter or two of the suffix of your call) 2) NCS help (as well as QSP/QNP relay help) Please join us: Sunday 2300z (Sunday 4 PM PDT) 14050 kHz Monday 0200z (Sunday 7 PM PDT) 7045 kHz Kevin. KD5ONS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KX1 build...so addictive!
It's after 1:00am on Sunday and I decided that it was time to stop stuffing parts and get some rest. I started around 10:15pm and have almost finished the first part of the assembly. I stopped after installing the three momentary push-buttons S3, S4, and S5. Next comes S2 (top of p. 24 on the Rev. B manual). I'm just so excited to see this thing spring to life and wanted to keep on going as long as I could. Now I know what you guys are talking about when you speak of knowing when to stop in the wee hours of the night. But, it's just so addictive!!! S/N 1601 is beginning to look good. I'll send a link to photos tomorrow (or rather, later on today). Zzzz. -john W4PAH ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] G5RV
BUT if you just want to get out for general rag-chewing, then the coax version combined with a rig with built-in auto matching makes for a very simple set-up. For a local ham with bad arthritis, that's all he wanted, ie push-button technology, no fiddling with knobs as he put it. I couldn't think of an easier solution for him. The only extra was a switch to make it into a top loaded system for 160m. For top to ten, this is the simplest and most cost-effective antenna I have ever used. After all, even though he lost a few watts in the coax, he was still getting out and probably within an S point of a properly set up doublet. Instead of running 50W he could run 100W, power is cheap and amateur radio gave him a great buzz. KISS where-ever possible. David G3UNA - Original Message - From: john petters [EMAIL PROTECTED] To: Ron D'Eau Claire [EMAIL PROTECTED] Cc: 'Elecraft' elecraft@mailman.qth.net Sent: Saturday, May 19, 2007 8:39 PM Subject: Re: [Elecraft] G5RV Ron D'Eau Claire wrote: Used that way, the G5RV is identical to the common multi-band doublet used since the 1920's. It's efficient if: 1) An efficient tuner is used capable of matching the rig to the antenna, and 2) No coax or other lossy feed line is used between the tuner and the radiator. Bottom line is that the practice of putting the tuner at the rig, and running coax between the tuner and the radiator with perhaps a balun or unun thrown in significantly increases the losses. Agree absolutely John G3YPZ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
