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which I used. Tony N2TK -----Original Message----- From: K7LXC@aol.com [mailto:K7LXC@aol.com] Sent: Thursday, September 12, 2002 08:42 To: Force12Talk@qth.com; mcgirr@interaccess.com Subject: [Force 12 Talk] EF-420H assembly questions In a message dated 9/11/02 10:12:09 PM Pacific Daylight Time, list@qth.com writes: > 1. The antenna was supplied with two bags of rivets: 110-Long & > 48-Small. 110 divided by four elements does not give an equal number of > long rivets per element. At what point on the elements do I switch from > long to small? I'm afraid if I use too many of the long ones on the first > two or three elements, I won't have enough for the last element. The long rivets are typically used for triple-walled applications - they'd be for the parts of elements closest to the boom. The short ones are used for everything else. You'll also have a bunch of rivets left over so the number included isn't a hard number for the required assembly. > > 2. There was a packet of Noalox compound supplied with antenna, but also a > packet of a copper colored compound. The instructions address the use of > Noalox, but don't mention the copper colored compound. > (looks like the stuff I used on my PolyPhaser bulkhead project, but there's > no Cu-Cu joints in this antenna). Sounds like they're both anti-oxidant and can be used interchangeably. I haven't seen the copper colored one you mention in any F12 antenna I've put together. If you're not sure, don't use it. > > 3. I bought a Force12 5kw balun along w/ the EF-420H. This balun is a > unit potted in a ABS box. The instructions say to mount the balun on a > plate of aluminum or polycarbonate using appropriate U-bolts. I don't have > any of these parts here, do carry these in your inventory? Don't worry about it. There is no convenient way to mount the balun - you have to hang the balun under the boom and it typically crosses an element or something else. Black tie wraps and tape will be sufficient. You can't put too much pressure on the balun like you would with U-bolts because the outer holder is pvc pipe and it's not very strong mechanically. Cheers, Steve K7LXC TOWER TECH - Professional tower services for commercial and amateur -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force12 Web Site: http://www.force12inc.com To Submit Message to the List: Force12Talk@qth.com To unsubscribe and view the Message Archive: see http://qth.com/force12/list For problems with the list: contact n4zr@qth.com -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force12 Web Site: http://www.force12inc.com To Submit Message to the List: Force12Talk@qth.com To unsubscribe and view the Message Archive: see http://qth.com/force12/list For problems with the list: contact n4zr@qth.com |
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