I don't have the tilt base. I bought my MA40 and beam used, so not sure of its age. Quality seems fine. I made an adapter for a cordless drill to allow me to crank it up and down without cranking. Vic is correct that the TA33Jr is a little more narrow banded than some leather beams. However, I use it successfully on both CW and SSB without a tuner. It has a lot less wind load than a full sized triband beam, which is important with a tower of that type if the rotor is placed at the top as I have it. Might not be as big an issue if you rotate the whole tower. On Tue, Jul 12, 2016 at 8:28 AM Mel Farrer via Elecraft < [email protected]> wrote:
> Don't discount the Hex Beam concept. > Mel, K6KBE > > > From: Vic Rosenthal 4X6GP <[email protected]> > To: [email protected]; Terry Brown <[email protected]> > Sent: Tuesday, July 12, 2016 6:12 AM > Subject: Re: [Elecraft] Need advice on Small Tower > > Hello Terry, > > In my opinion, there will be no problem. I can imagine that if the tower > is right at the house and if there is a strip of metal flashing along > the peak of the roof it might detune the director slightly when the > antenna is pointed east. Maybe. But I can't believe it will cause you > any trouble. Anyway, with the tilt base you will have to install it some > distance from the house. > > Remember the tilt base and the rotor plus mast will add to the height of > the tower. US Towers also makes a 55-footer. It's a lot more expensive, > though. > > I don't recommend the TA33-JR. Because of the short boom length it will > have a narrow bandwidth on 20m. If you operate both CW and SSB you may > find that you need to use a tuner. Your old ATB-34 is slightly bigger, > but has a wider bandwidth. > > There are newer designs for small beams that are better than the > venerable TA-33. > > Also if you can find one that works on 18 MHz too, that will be a plus. > In the next few years, 10 and 15m will be dead much of the time. > > 73, > Vic, 4X6GP > Rehovot, Israel > Formerly K2VCO > http://www.qsl.net/k2vco/ > > On 12 Jul 2016 04:21, Terry Brown wrote: > > Hello all, > > > > I am the owner if a K2, KX3, PX3, and KXPA100. I have been a ham since > > 1982, and love my Elecraft gear. I have a question for the group. I am > > moving from my current QTH in Corvallis, OR after 30 years. Currently I > > have a Rohn 25 based tower that is about 35 feet above my flat roof. On > the > > tower is a tri-band Cushcraft ATB-34 and 2m/440 comet antennas. The beam > > and tower date from the time I became a ham. > > > > I am building a new home in an established neighborhood in West Salem, > > Oregon. The CCRs have expired, so I am not restricted from a tower > setup. > > My new QTH is high in the west hills of Salem. The view to the east is > > amazing as the ground slopes away. To the west, the terrain has a slight > > rise. I am 68 yrs. old. I don't want to have to climb a tower again. > My > > home will be two stories with the garage level under it. The peak of my > > roof will be about 34 ft. above grade. My new tower location will be > about > > 32 feet from grade to the peak of the roof. The roofline will run N-S > with > > the tower on the west side of the house. \ > > > > I have decided to purchase a new smaller lightweight crankup tower and a > > smaller tribander such as the Mosley TA-33 JR-N or NW. I have seen the > US > > Towers MA-40, a 20-41ft. crankup as one type. It comes with a tilt over > > base add-on which would allow me to service the antenna from the ground. > > This particular two section tower can crank down to 20 ft., thus not > being > > visible from the street east of the house. It's max height is 41 ft. > which > > would put the antenna only 9-10 ft. above the roofline when transmitting > to > > the East. I want to put a winch on the tower so I don't have to > physically > > crank it up by hand as I get older. With this background I have two > > questions: > > > > 1. Will the yagi attached to the tower with only 9-10 ft. height above > > the roofline (41 ft. tower) be an effective radiator and receive > antenna on > > 20-15-10 meter bands to the East? Being on the West Coast, this will be > the > > direction of most of my mainland US contacts. To the N-W-S, the antenna > > will be 41 ft. above the ground, so no problem. > > > > 2. I am not committed to any particular crankup tower. The US Tower > is > > just the one I have seen on the internet. I would be interested in any > > lighterweight fold over crank up tower up to 50 ft. I think a tubular > > constructed type tower would be my preference due to weight of > installation. > > A triangular designed crankup may be ok, too. > > > > I know I can have a larger tower and antenna, but I want my setup to be > > neighbor friendly. I am not a contester, and will never operate over 100 > > watts. It is nice to be able to work a station if I can hear it. I also > > want the advantage of a horizontally polarized antenna with gain. I have > > been spoiled with that setup over the years. > > > > Just as an aside, my other antenna is a horizontal loop about 250 ft. in > > length that I use for all the other bands. It is up about 30 ft. > suspended > > from the trees in my current QTH. I feed it with 450 ohm ladder into a > 4:1 > > balun to coax. At my new QTH, we will plant two contained planters with > 20 > > or 30 ft. bamboo on the SW and NW corners of my property where I can put > a > > vertical pipe for two supports, then use the peak of my roof on the N > and S > > side at 34 Ft. for my NE and SE contact points for my other two corners > for > > my horizontal loop. I will feed it with the same 450 ohm ladder from > the NE > > corner. I really like my horizontal loop because it is so quiet being > > horizontally polarized. My current one works great so I want the same > thing > > for my new QTH. > > > > I look forward to getting some great input from this group. I have been > > amazed at the level of quality information I have seen on this group. > > > > Thanks in advance to you all. > > 73's, > > Terry Brown, N7TB > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
