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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZYHTEA672NKT4PID6VEJLWRMVA6UINFU/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "6A5086715BB9497CBE3B8BDB3B7ECC42@JamesPC", "message_id_hash": "ZYHTEA672NKT4PID6VEJLWRMVA6UINFU", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/ZYHTEA672NKT4PID6VEJLWRMVA6UINFU/?format=api", "sender": { "address": "jdanehy (a) cinci.rr.com", "mailman_id": null, "emails": null }, "sender_name": "Jim Danehy", "subject": "[amsat-bb] Fw: ELK or ARROW", "date": "2008-12-28T02:33:29Z", "parent": null, "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/TD4GEDCZX3MKMHTHSFEQYUE3LVXPLUXJ/?format=api", "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/EUSCFX5TOZZNI5RPQLQLSPUEVEHSW6BN/?format=api", "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YMMQAN3LQEB7NKCSWW3J7OOR45K4MNHI/?format=api", "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OINKO7BQGBR2W2QEYFDZFFB4NFWOBXF5/?format=api" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "\n. there is the old adage that you get what you pay for . . . why buy a \npoorly designed antenna that does not work very well\n> ?\n>\n> If you have a 5 element yagi that only produces 4 dbi you are not getting \n> what you paid for . . . most 2 element yagis would out perform that \n> statistic . . . a 5 element yagi should be at least 9 db + or 10 db dbd \n> (dipole ) not isotropic . . . . there is something that is called \n> MERCHANTABILITY . . .i.e., an IMPLIED WARRANTY that you are getting at \n> least the minimum for your money . . .\n> 4 dbi for an Arrow is way off base . . . so it is not just ; you can not \n> afford a Cadillac but you are not even getting a Ford or Chevy . . i.e., \n> the gain of a 5 element yagi on 435 mhz . . . that is the issue, not cost \n> alone . . . . . . same comments apply to the ELK but I have attempted to \n> make the point that there is a minimum performance for a certain number of \n> elements that is pretty OBJECTIVE and when it is not met . . . . well \n> that is my point . . . these two antennas have shown to some testers that \n> they do not measure up to the minimum EXPECTATIONS . . .unfortunately that \n> is acceptable to some . . . . then it becomes acceptable to many . . . \n> and objectivity is abandoned . . .\n>\n> Jim W9VNE\n>\n>\n> ----- Original Message ----- \n> From: \"Trey Brown\" <[email protected]>\n> To: \"Jim Danehy\" <[email protected]>\n> Sent: Saturday, December 27, 2008 6:39 PM\n> Subject: Re: [amsat-bb] ELK or ARROW\n>\n>\n>> Thanks for the comments. Realize, though, that not everyone wants or\n>> can afford to have the Cadillac.\n>>\n>>\n>> On Sat, Dec 27, 2008 at 4:06 PM, Jim Danehy <[email protected]> wrote:\n>>> the Arrow antenna has been critiqued by Kent Britain, WA5VJB\n>>>\n>>> http://wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf\n>>>\n>>> he says that some have measured the Arrow for gain on 435 mhz @ 4 dbi \n>>> (isotropic) . . . . and that further analysis showed that for the \n>>> element lengths used on 435 mhz that it peaks at 457 mhz and not 435 mhz \n>>> . . . Kent is a well respected VHF/UHF antenna person who has plenty of \n>>> credibility . . .\n>>>\n>>> Kent opines that the Arrow, as built does not have its elements \n>>> insulated from the boom. It uses dimensions for insulated elements . . . \n>>> so much for the Arrow . . . .\n>>>\n>>> Now for the ELK : a local friend of mine owns an Arrow and he uses it \n>>> successfully. He bought an ELK and attempted to compare the Arrow and \n>>> the ELK . . . . he could not make an across town QSO on 435 mhz from his \n>>> second story window with the ELK , so he sent the ELK back for a refund \n>>> .\n>>>\n>>> I have worked and exchanged QSLs with several hundred satellite users . \n>>> . .the majority of the folks that have worked and QSLed me (close to 250 \n>>> + ) have been using either the Arrow or ELK based upon the information \n>>> on their cards. So they are popular. Are they optimum ? A lot of \n>>> anecdotal information would seem to say NO . . .\n>>>\n>>> Thirty-five years ago I worked Oscar 6 with a homebrew 2 mtr yagi that \n>>> probably was worse than either the Arrow or Elk but I worked YV and KL7 \n>>> from Indiana on CW with about 15 watts to the 3 elements which my XYL \n>>> waved around at my directions . . . not any more . . .what do I use \n>>> these days : a pair of circular polarity yagis on 10 foot booms \n>>> manufactured by M Square . . . .\n>>>\n>>> Folks ask what should they buy ? Maybe a Ford or maybe a Chevy . . . \n>>> neither is a Cadillac . . . .\n>>>\n>>> Jim W9VNE\n>>> _______________________________________________\n>>> Sent via [email protected]. Opinions expressed are those of the author.\n>>> Not an AMSAT-NA member? Join now to support the amateur satellite \n>>> program!\n>>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>>>\n>>\n>>\n>>\n>> -- \n>> Trey -- N5THX\n>>\n>> They who can give up essential liberty to obtain a little temporary\n>> safety, deserve neither liberty nor safety.\n>> - Benjamin Franklin\n>>\n> \n\n", "attachments": [] }