Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: How many can you put together for a lightweight antenna ?
Document: I just got my HAM Ticket and decided I wanted to utilize a 25/65w Kenwood Mobile Rig for the house. As many experienced Amateurs know, the $150 2-Meter radio is the least of the costs when putting together a home system... it's really all about the antenna system.
i put 3 of these together and installed on my 20 foot tower to get the elevation to bring in great signal. very reasonably priced.
Well, it's a metal pole so not much to review here. I used this for my Mom's house for an HD Antenna I put on her roof. It gave me a bit more height and I needed it to attach the motor for turning the antenna.
Used it for an attic mount antenna. Was going to piece together parts from a hardware store to make it work but for the price it wasn't worth it.
I needed a standard TV antenna mast to pair with my Channel Master 2018 antenna. The word standard is important as many universal antenna mounts are not the standard diameter for TV antennas, which is 1.25". Antennas generally come with U-bolts/clamps which attach to masts up to 1.5".
Have one mounted off my porch with a Supersonic SC603 HDTV antenna mounted on it. Says can connect up to three of these together so I plan to buy two more eventually for 15' height for better reception. Hardware to mount the pole bought for under $2 at local hardware, don't buy mounting kits online outrageously priced FYI.
It is as advertised and I am satisfied. I cannot think of that many words to descrive this. I would recommend it for anyone that is need for a mast.
What can one say about some galvanized pipe. It is strong enough for smaller antennae and has already put up with some 50+ mile an hour gusts here.CONS:  I had to use a half-round file to take the small metal burrs off of the ends of the tubes before they would mate.
The name says it all. Good heavy duty and fits together well. Good coating and I think it will last a long time. Well worth the price but be aware that the shipping is more than the mast.
This antenna mast is strong and sturdy. I used it to mount a weather station on it. Great for that!
Answer: It depends on your definition of "lightweight" .  I have three sections supporting a J-pole antenna for Ham radio.  It weighs about five pounds and have had no problems at all.