The ALUMA T-50HN TOWER PROJECT
I’m in the process of changing out the current tower installation to a mid pivot swivel point that Aluma Tower recommends. I purchased and received a new MP2 post as the old one cannot be removed from 5 feet of cement. Jackhammering will cost up to $1,000 labor. I’m using the old MP2 post next to the house to add a 30′ mast for other antennas.
Important! If you decide to install the tower as I originally did, there is a lot of strain on the 2 bolts that connect the tower leg base to the T Base. Make sure you use large stainless steel bolts with nylon sleeves that fit between the tower holes and the bolts. The bigger the hole, the less tower base leg you will have to withstand the pressure. You might try using the Hinge supplied with the tower and mounting it on the T-BASE to the Base of the tower.
Some hams have asked about mounting the pulley cable directly to the house and not to the MP2 post. Don’t ever use a house bracket or pulley connected to the house. The weight will rip the bracket/bolts off the house and cause structural damage. The MP2 post takes a lot of strain when lifting the tower from it’s base. Especially with the weight of a Mosley HF tri-band, 2 and 6 meter yagis. We have had 3 noreasters here on Cape Cod the month of March 2018 and after 5 years, one of the 2 bolts started to bend.
I suggest installing the tower as shown in the lower photo. I plan on mounting the MP2 post 10 feet away from the back of the house. When the tower is lying down, it’s 7 feet from the hinge (pivot point) to the base of the tower. That will leave 3 feet clearance from the tower base to the house.
My T-50H Aluma Tower has 3 Guy holes at the top of the tower. Make sure all guy wire parts are galvanized or stainless steel, including u-bolts, turnbuckles and guy anchors which are galvanized steel. Make sure you use commercial grade 3-4 foot length galvanized guy anchors. I purchased them from a cell tower company. Make sure the top hole is welded closed and NOT open as pressure could bend the steel causing the end to open and the guy cable falling out under pressure. Local hardware stores sell that type. Don’t buy it. Aluma Tower also sells the closed loop type.
I hope this information was helpful. The T-50H tower has been in service for 7 years and works as well as it did when I first purchased it in 2011. A great investment for amateur radio operators who hate climbing towers.
Thanks all .. 73 Bill N2KNL
Tower install finished May 26, 2018. Here are the installation steps..
Updated Tower Installation
Starting May 7, 2018
Part 1 – Installing the MP2 Tower Post.
May 7, 2018 – The MP2 tower post will be installed where the 7 foot mast stands. The tower base screws have been removed from the T-Base and I lifted the tower 3 feet to the side to prepare a 60 inch by 13 inch hole for the MP2. The top portion of the tower/antennas rest on the wood support. The tower is top heavy and lifting the base was easy.
May 7, 2018 – MP2 tower post arrived from Aluma Tower in Florida via 2 freight companies.
May 8, 2018 – Purchased 3 100′ 3/16″ diameter stainless steel guy cable spools for $20 each at the Deerfield, New Hampshire Near-Fest. I’m replacing the original galvanized cable that was on the tower for the last 6 years. Also purchased on Amazon were 1/8″ Stainless Steel Thimbles and 1/8″ Wire Rope Clips that secure to the 3 tower guy cables. Still using the original stainless steel turnbuckles.
May 7, 2018 – I called DIG SAFE and as expected there were no utility services underground.
May 18, 2018 – Digging the MP2 hole. Purchased a $70 steel wagon from Harbor Freight to haul soil away and move the MP2 post.
May 26, 2018 – Finishing the MP2 Installation. We used a post hole digger to extract 5 feet of sand and dirt, after we used a shop-vac to suck out the remaining sand to 73 inches but we went down 85 inches in case any sand along the size wall would scrape off and collapse to the bottom of the hole. The shop-vac was a blessing the last 2 feet.
We removed the MP2 post from the wood pallet and 4 guys carried it to the work area and prepared to set it into the hole. Chris (blue shirt) was holding a piece of wood against the base of the post as they lowered the post down so it post wouldn’t scrape against the dirt.
MP2 Post install completed..
Tower Vertical / Pin locked in..
Finished product. The Mosley TA-33-M yagi 20 meter antenna element was removed for the install.
Thanks goes out to Chris KB1ZAM, Rob K1UI, Dick W1SIL, Brian & Bill for all their help! The install lasted about 2 hours.
An important note, the alignment connection of the MP2 post to the tower was tricky. The rotor, antennas & mast were already on the tower causing a lot of weight. We moved the tower back and forth positioning the alignment holes so Rob K1UI tightened the bolts . It would have gone easier if it was just the tower itself.
The last steps.. remove the hand crank and install a new Harbor Fright 2,500 lb. 12 volt winch and run battery wires inside PVC pipe underground 13 feet to the deep cycle battery against the house. Next, secure the coax, camera wire, adjust the DAVIS wind instrument and install new stainless steel guy cables and hardware. The ground guy anchors are already in place. The base tower angle when nested is higher than the resting post. It’s 7 feet above the patio. Easy to walk under and cut grass. I’m adding a 2 foot high horizontal support mounted atop the wood post consisting of screw-in flanges and threaded pipe covered with pipe insulation foam to protect the tower when lowered from getting scratched or dented. Elaine and I are planning to have patio pavers installed and leave a 2 foot square area of stone around the tower base.
More photos to come..
May 1, 2012
Thanks for visiting!
My wife, Elaine KB1VAJ and I purchased our Aluma T-50H Tower June 2011 and it’s been in service 6 years. It’s been some time since there has been an update on the tower page. Many of you know, Aluma Tower Company manufactures an excellent product! The T-50H has been through all kinds of weather here on Cape Cod. High winds (numerous wind gusts up to 73 MPH), extreme temperatures, moisture, rain, snow, sleet and sun. We added equipment to the tower, a Davis Vantage Pro2 6152 cabled weather station and 3 wired cameras with a great 65 foot high view. I’m almost 60 years old and lowering/tilting over the tower for maintenance is essential. My climbing days are over!
Aluma Tower MP-2 Post Installation Drawings Received April 5, 2018
Aluma Tower T-50HN / MP-2 Drawings
Updated May 18, 2017
N2KNL.com Website Online Since 10/20/16
N2KNL.com website online since 10/20/16