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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IWXOVW3WHAT3M5A2DM5EITCAHUL7EH6O/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "1FD73B7E679A432F876AF14FD053B586@athlon",
    "message_id_hash": "IWXOVW3WHAT3M5A2DM5EITCAHUL7EH6O",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/ZPEMJRSTCHKAMVJNLKPK6QO4FPSLSWJW/?format=api",
    "sender": {
        "address": "ve4yz (a) mts.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Alan",
    "subject": "[amsat-bb] Re: Gulf Alpha Antenna Model No.2M 70CM Sat.\t(DualBandAntenna)",
    "date": "2008-12-26T17:44:54Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/5JO23KWSXWR7DJL3CS2BRAHST63WYX6G/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Guy and the group... \n\nHere is Pete's current dual band yagi which I believe you are referring to\n\nhttp://www.gulfalphaantennas.com/Product%20Page%202M%2070CM%20sat%20yagi.htm\nl\n\nAs Joe mentioned, the craftsmanship and material quality is first class.  I\nam also the owner of the older versions shown in the first couple of\npictures here:\n\nhttp://picasaweb.google.com/ve4yz.alan/VE4YZ#\n\nwhere I ran a pair of them with M2 matching tees and no mast mount preamps (\nbut with the internal preamps in the FT847 ) but with AZ and EL control.\n\nThis was satisfactory for me for a while and worked well especially on the\nSSB sats, FO-29, VO-52, AO-7.  On FM AO-52 and SO-50 there were fads due to\nlack of polarity control.  GO-32 and ISS TX are so strong that polarity\ncontrol was not an issue.\n\nHowever, I eventually moved to abbreviated KLM's ( due to tower limitations\nand roof clearance ) with polarization control and Landwehr preamps shown in\nthe later photos.  The improvement was huge!  I have the KLM's and HyGain's\nfull length at 2 other locations and the performance is a little better but\nnot a huge an improvement as going for no polarity control to the switchable\npolarization.\n\nHere... http://www.mts.net/~ve4wsc/photogallery/tour3.htm  M2/KLM\nAnd here... http://picasaweb.google.com/WinCube.Winnipeg/GroundStation#\nHyGain\n\nThe GulfAlphas are in storage in the garage rafts and are ready for use at\nField Day and other events.\n\nAt my QTH I think I am an example of what is often heard in ham circles -\ninvest as much as you can on the antenna, on feedline and preamps.  At home\nI went from a rotator mounted Arrow to the GulfAlphas to the KLMs over the\ncourse of about 4 years.  They all worked.   But they all worked differently\n:-)   Unfortuantely this is a case of $$$ being a big part of the solution.\n\n\n... Alan\n\n\n> -----Original Message-----\n> From: [email protected] \n> [mailto:[email protected]] On Behalf Of Gary \"Joe\" Mayfield\n> Sent: December 26, 2008 7:28 AM\n> To: 'Guy Brauning'; [email protected]\n> Subject: [amsat-bb] Re: Gulf Alpha Antenna Model No.2M 70CM \n> Sat. (DualBandAntenna)\n> \n> Guy,\n> \n>      I have the previous version of the Gulf Alpha dual band. \n>  We use it at field day every year and it performs well.  \n> Your idea to add the pre-amp is wise as it is a little short \n> for some of the UHF downlink signals.  \n> \n>      You may also want to plan for some classic mode J \n> de-sense issues which aren't really a factor of the antenna \n> as much as a reality of listening on the third harmonic of \n> your transmit signal.\n> \n>      On the whole it has been a great antenna, and that \n> sucker is built like a battleship.  I wish he had a larger \n> line of antennas as he builds a VERY solid product.  I \n> believe Gulf Alpha is a one man shop so there may be some \n> lead time as well, but definitely worth the wait!\n> \n> 73,\n> Joe kk0sd\n> \n> -----Original Message-----\n> From: [email protected] \n> [mailto:[email protected]] On Behalf Of Guy Brauning\n> Sent: Thursday, December 25, 2008 7:44 PM\n> To: [email protected]\n> Subject: [amsat-bb] Gulf Alpha Antenna Model No.2M 70CM Sat. (Dual\n> BandAntenna)\n> \n> Hello and thanks for reading this.  I am looking for some \n> \"Owner Experience\"\n> before making a decision about buying one of the Gulf Alpha \n> dual band satellite antennas.  I know the antenna is a \n> compromise compared to a pair of circular polarized yagis; \n> however, I am looking for a less expensive alternative for a \n> basic 2M/70CM base set-up. My only experience with the \n> satellites has been with handheld/portable radios (FT-60R and \n> FT-817ND) and the Arrow and ELK handheld antennas.  My guess \n> is that the Gulf Alpha dual band satellite antenna (installed \n> above obstructions and with an AZ rotator / low loss feed \n> lines / and a 70CM mast mounted pre-amp) would be comparable \n> if not considerably better than the handheld Arrow/ELK for FM \n> work on AO-51 and SO-51 (for passes at or below 40 degrees \n> max elevation) but I would also like to work some of the \n> linear sats on SSB/CW and I don't know if the antenna would \n> meet that need. (I already have a 2Meter all mode in addition \n> to the FT-817 as well as a refurbished CD-44 rotor.)  If this \n> antenna would support reliable CW/SSB contacts on the linear \n> satellites, it would be a good fit.  I would install the \n> antenna at approximately 25 feet in height, leave it fixed at \n> 15 degs elevation using the supplied mast mount, and rotate \n> it with a CD-44 rotator.  I plan on using LMR-600 coax for \n> the 432 run and LMR-400U for the 2 meter run (Total length \n> for each run about 30 - 40 feet).  I would also use an AR2 \n> mast mounted 432 preamp and Polyphasers at the shack entry \n> with appropriate jumpers (best loss specs vs. needed\n> flexibility) from the Polyphasers to the radios.  Radios \n> would be a Yaesu FT-290R MKII (2 MTR All-Mode) and a Yaesu \n> FT-817ND for 432.  I'm looking for someone with experience \n> using the Gulf Alpha to let me know their opinion of how well \n> the antenna might play given my anticipated installation specifics.\n> \n> \n>  \n> \n> Thanks for your help!\n> \n>  \n> \n> Guy \n> \n>  N3SCR\n> \n\n",
    "attachments": []
}